Fixing accidental merge from WIP branch. (#32520)

Revert "Merge branch 'master' into master"

This reverts commit e3a03c04c4, reversing
changes made to 6474982649.

packages/flutter/test/cupertino/date_picker_test.dart

@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+import 'dart:io' show Platform;
 import 'dart:ui';
 
 import 'package:flutter/cupertino.dart';
@@ -822,6 +823,43 @@ void main() {
       );
     });
 
+    testWidgets('DatePicker golden tests', (WidgetTester tester) async {
+      await tester.pumpWidget(
+        CupertinoApp(
+          home: Center(
+            child: SizedBox(
+              width: 400,
+              height: 400,
+              child: RepaintBoundary(
+                child: CupertinoDatePicker(
+                  mode: CupertinoDatePickerMode.dateAndTime,
+                  initialDateTime: DateTime(2019, 1, 1, 4),
+                  onDateTimeChanged: (_) {},
+                ),
+              )
+            ),
+          )
+        )
+      );
+
+      await expectLater(
+        find.byType(CupertinoDatePicker),
+        matchesGoldenFile('date_picker_test.datetime.initial.1.png'),
+        skip: !Platform.isLinux
+      );
+
+      // Slightly drag the hour component to make the current hour off-center.
+      await tester.drag(find.text('4'), Offset(0, _kRowOffset.dy / 2));
+      await tester.pump();
+
+      await expectLater(
+        find.byType(CupertinoDatePicker),
+        matchesGoldenFile('date_picker_test.datetime.drag.1.png'),
+        skip: !Platform.isLinux
+      );
+    });
+  });
+
   testWidgets('scrollController can be removed or added', (WidgetTester tester) async {
     final SemanticsHandle handle = tester.ensureSemantics();
     int lastSelectedItem;
@@ -895,35 +933,6 @@ void main() {
     expect(lastSelectedItem, 1);
     handle.dispose();
   });
-
-  testWidgets('DatePicker golden tests', (WidgetTester tester) async {
-      await tester.pumpWidget(
-        CupertinoApp(
-          home: SizedBox(
-            width: 200,
-            child: CupertinoDatePicker(
-              mode: CupertinoDatePickerMode.dateAndTime,
-              initialDateTime: DateTime(2019, 1, 1, 4),
-              onDateTimeChanged: (_) {},
-            )
-          )
-        )
-      );
-
-      await expectLater(
-        find.byType(CupertinoDatePicker),
-        matchesSkiaGoldFile('date_picker_test.datetime.initial.png'),
-      );
-
-      // Slightly drag the hour component to make the current hour off-center.
-      await tester.drag(find.text('4'), Offset(0, _kRowOffset.dy / 2));
-      await tester.pump();
-
-      await expectLater(
-        find.byType(CupertinoDatePicker),
-        matchesSkiaGoldFile('date_picker_test.datetime.drag.png'),
-      );
-  });
 }
 
 Widget _buildPicker({ FixedExtentScrollController controller, ValueChanged<int> onSelectedItemChanged }) {

packages/flutter/test/cupertino/nav_bar_test.dart

@@ -2,6 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+import 'dart:io';
+
 import 'package:flutter/cupertino.dart';
 import 'package:flutter/rendering.dart';
 import 'package:flutter/services.dart';
@@ -799,9 +801,12 @@ void main() {
 
       await expectLater(
         find.byType(RepaintBoundary).last,
-        matchesSkiaGoldFile('nav_bar_test.standard_title.png'),
+        matchesGoldenFile('nav_bar_test.standard_title.1.png'),
       );
     },
+    // TODO(xster): remove once https://github.com/flutter/flutter/issues/17483
+    // is fixed.
+    skip: !Platform.isLinux,
   );
 
   testWidgets(
@@ -830,9 +835,12 @@ void main() {
 
       await expectLater(
         find.byType(RepaintBoundary).last,
-        matchesSkiaGoldFile('nav_bar_test.large_title.png'),
+        matchesGoldenFile('nav_bar_test.large_title.1.png'),
       );
     },
+    // TODO(xster): remove once https://github.com/flutter/flutter/issues/17483
+    // is fixed.
+    skip: !Platform.isLinux,
    );
 
 

packages/flutter/test/cupertino/segmented_control_test.dart

@@ -2,6 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+import 'dart:io';
+
 import 'package:flutter/widgets.dart';
 import 'package:flutter/cupertino.dart';
 import 'package:flutter_test/flutter_test.dart';
@@ -1325,9 +1327,9 @@ void main() {
 
     await expectLater(
       find.byType(RepaintBoundary),
-      matchesSkiaGoldFile('segmented_control_test.0.png'),
+      matchesGoldenFile('segmented_control_test.0.0.png'),
     );
-  });
+  }, skip: !Platform.isLinux);
 
   testWidgets('Golden Test Pressed State', (WidgetTester tester) async {
     final Map<int, Widget> children = <int, Widget>{};
@@ -1363,7 +1365,7 @@ void main() {
 
     await expectLater(
       find.byType(RepaintBoundary),
-      matchesSkiaGoldFile('segmented_control_test.1.png'),
+      matchesGoldenFile('segmented_control_test.1.0.png'),
     );
-  });
+  }, skip: !Platform.isLinux);
 }

packages/flutter/test/material/bottom_app_bar_test.dart

@@ -2,6 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+import 'dart:io';
+
 import 'package:flutter_test/flutter_test.dart';
 import 'package:flutter/material.dart';
 import 'package:flutter/rendering.dart';
@@ -71,15 +73,15 @@ void main() {
     await pump(FloatingActionButtonLocation.endDocked);
     await expectLater(
       find.byKey(key),
-      matchesSkiaGoldFile('bottom_app_bar.custom_shape.1.png'),
+      matchesGoldenFile('bottom_app_bar.custom_shape.1.png'),
     );
     await pump(FloatingActionButtonLocation.centerDocked);
     await tester.pumpAndSettle();
     await expectLater(
       find.byKey(key),
-      matchesSkiaGoldFile('bottom_app_bar.custom_shape.2.png'),
+      matchesGoldenFile('bottom_app_bar.custom_shape.2.png'),
     );
-  });
+  }, skip: !Platform.isLinux);
 
   testWidgets('color defaults to Theme.bottomAppBarColor', (WidgetTester tester) async {
     await tester.pumpWidget(

packages/flutter/test/material/bottom_app_bar_theme_test.dart

@@ -2,6 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+import 'dart:io' show Platform;
+
 import 'package:flutter/material.dart';
 import 'package:flutter/rendering.dart';
 import 'package:flutter_test/flutter_test.dart';
@@ -80,7 +82,8 @@ void main() {
 
     await expectLater(
       find.byKey(_painterKey),
-      matchesSkiaGoldFile('bottom_app_bar_theme.custom_shape.png'),
+      matchesGoldenFile('bottom_app_bar_theme.custom_shape.png'),
+      skip: !Platform.isLinux,
     );
   });
 

packages/flutter/test/material/bottom_navigation_bar_test.dart

@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+import 'dart:io';
 import 'dart:ui';
 
 import 'package:flutter/material.dart';

packages/flutter/test/material/card_theme_test.dart

@@ -2,6 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+import 'dart:io' show Platform;
+
 import 'package:flutter/material.dart';
 import 'package:flutter/rendering.dart';
 import 'package:flutter_test/flutter_test.dart';
@@ -137,7 +139,8 @@ void main() {
 
     await expectLater(
       find.byKey(painterKey),
-      matchesSkiaGoldFile('card_theme.custom_shape.png'),
+      matchesGoldenFile('card_theme.custom_shape.png'),
+      skip: !Platform.isLinux,
     );
   });
 }

packages/flutter/test/material/dialog_theme_test.dart

@@ -2,6 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+import 'dart:io' show Platform;
+
 import 'package:flutter/material.dart';
 import 'package:flutter/rendering.dart';
 import 'package:flutter_test/flutter_test.dart';
@@ -130,7 +132,8 @@ void main() {
 
     await expectLater(
       find.byKey(_painterKey),
-      matchesSkiaGoldFile('dialog_theme.dialog_with_custom_border.png'),
+      matchesGoldenFile('dialog_theme.dialog_with_custom_border.png'),
+      skip: !Platform.isLinux,
     );
   });
 

packages/flutter/test/material/dropdown_test.dart

@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+import 'dart:io';
 import 'dart:math' as math;
 import 'dart:ui' show window;
 
@@ -140,7 +141,8 @@ void main() {
     assert(tester.renderObject(buttonFinder).attached);
     await expectLater(
       find.ancestor(of: buttonFinder, matching: find.byType(RepaintBoundary)).first,
-      matchesSkiaGoldFile('dropdown_test.default.png'),
+      matchesGoldenFile('dropdown_test.default.0.png'),
+      skip: !Platform.isLinux,
     );
   });
 
@@ -152,7 +154,8 @@ void main() {
     assert(tester.renderObject(buttonFinder).attached);
     await expectLater(
       find.ancestor(of: buttonFinder, matching: find.byType(RepaintBoundary)).first,
-      matchesSkiaGoldFile('dropdown_test.expanded.png'),
+      matchesGoldenFile('dropdown_test.expanded.0.png'),
+      skip: !Platform.isLinux,
     );
   });
 

packages/flutter/test/material/floating_action_button_test.dart

@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+import 'dart:io';
 import 'dart:ui';
 
 import 'package:flutter/material.dart';
@@ -680,7 +681,8 @@ void main() {
     await tester.pump(const Duration(milliseconds: 1000));
     await expectLater(
       find.byKey(key),
-      matchesSkiaGoldFile('floating_action_button_test.clip.png'),
+      matchesGoldenFile('floating_action_button_test.clip.2.png'), // .clip.1.png is obsolete and can be removed
+      skip: !Platform.isLinux,
     );
   });
 

packages/flutter/test/material/input_decorator_test.dart

@@ -3,6 +3,7 @@
 // found in the LICENSE file.
 
 import 'dart:async';
+import 'dart:io' show Platform;
 
 import 'package:flutter/material.dart';
 import 'package:flutter/rendering.dart';
@@ -2019,15 +2020,19 @@ void main() {
       await tester.pumpWidget(buildFrame(TextDirection.ltr));
       await expectLater(
         find.byType(InputDecorator),
-        matchesSkiaGoldFile('input_decorator.outline_icon_label.ltr.png'),
+        matchesGoldenFile('input_decorator.outline_icon_label.ltr.png'),
+        skip: !Platform.isLinux,
       );
 
       await tester.pumpWidget(buildFrame(TextDirection.rtl));
       await expectLater(
         find.byType(InputDecorator),
-        matchesSkiaGoldFile('input_decorator.outline_icon_label.rtl.png'),
+        matchesGoldenFile('input_decorator.outline_icon_label.rtl.png'),
+        skip: !Platform.isLinux,
+      );
+    },
+    skip: !Platform.isLinux,
   );
-    });
 
   testWidgets('InputDecorationTheme.toString()', (WidgetTester tester) async {
     // Regression test for https://github.com/flutter/flutter/issues/19305

packages/flutter/test/material/material_test.dart

@@ -2,6 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+import 'dart:io' show Platform;
+
 import 'package:flutter/material.dart';
 import 'package:flutter/painting.dart';
 import 'package:flutter/rendering.dart';
@@ -616,7 +618,8 @@ void main() {
 
       await expectLater(
         find.byKey(painterKey),
-        matchesSkiaGoldFile('material.border_paint_above.png'),
+        matchesGoldenFile('material.border_paint_above.png'),
+        skip: !Platform.isLinux,
       );
     });
 
@@ -656,7 +659,8 @@ void main() {
 
       await expectLater(
         find.byKey(painterKey),
-        matchesSkiaGoldFile('material.border_paint_below.png'),
+        matchesGoldenFile('material.border_paint_below.png'),
+        skip: !Platform.isLinux,
       );
     });
   });

packages/flutter/test/material/radio_test.dart

@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+import 'dart:io' show Platform;
 import 'dart:ui';
 
 import 'package:flutter/rendering.dart';
@@ -276,7 +277,8 @@ void main() {
     await tester.pumpAndSettle();
     await expectLater(
       find.byKey(painterKey),
-      matchesSkiaGoldFile('radio.ink_ripple.png'),
+      matchesGoldenFile('radio.ink_ripple.png'),
+      skip: !Platform.isLinux,
     );
   });
 }

packages/flutter/test/material/tab_bar_theme_test.dart

@@ -2,6 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+import 'dart:io' show Platform;
+
 import 'package:flutter/material.dart';
 import 'package:flutter/rendering.dart';
 import 'package:flutter_test/flutter_test.dart';
@@ -267,7 +269,8 @@ void main() {
 
     await expectLater(
       find.byKey(_painterKey),
-      matchesSkiaGoldFile('tab_bar_theme.tab_indicator_size_tab.png'),
+      matchesGoldenFile('tab_bar_theme.tab_indicator_size_tab.png'),
+      skip: !Platform.isLinux,
     );
   });
 
@@ -278,7 +281,8 @@ void main() {
 
     await expectLater(
       find.byKey(_painterKey),
-      matchesSkiaGoldFile('tab_bar_theme.tab_indicator_size_label.png'),
+      matchesGoldenFile('tab_bar_theme.tab_indicator_size_label.png'),
+      skip: !Platform.isLinux,
     );
   });
 
@@ -294,7 +298,8 @@ void main() {
 
     await expectLater(
       find.byKey(_painterKey),
-      matchesSkiaGoldFile('tab_bar_theme.custom_tab_indicator.png'),
+      matchesGoldenFile('tab_bar_theme.custom_tab_indicator.png'),
+      skip: !Platform.isLinux,
     );
   });
 
@@ -310,7 +315,8 @@ void main() {
 
     await expectLater(
       find.byKey(_painterKey),
-      matchesSkiaGoldFile('tab_bar_theme.beveled_rect_indicator.png'),
+      matchesGoldenFile('tab_bar_theme.beveled_rect_indicator.png'),
+      skip: !Platform.isLinux,
     );
   });
 }

packages/flutter/test/painting/continous_rectangle_border_test.dart

@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+import 'dart:io' show Platform;
 import 'package:flutter/material.dart';
 import 'package:flutter/painting.dart';
 import 'package:flutter_test/flutter_test.dart';
@@ -71,7 +72,8 @@ void main() {
 
     await expectLater(
       find.byType(RepaintBoundary),
-      matchesSkiaGoldFile('continuous_rectangle_border.golden_test_even_radii.png'),
+      matchesGoldenFile('continuous_rectangle_border.golden_test_even_radii.png'),
+      skip: !Platform.isLinux,
     );
   });
 
@@ -92,7 +94,8 @@ void main() {
 
     await expectLater(
       find.byType(RepaintBoundary),
-      matchesSkiaGoldFile('continuous_rectangle_border.golden_test_varying_radii.png'),
+      matchesGoldenFile('continuous_rectangle_border.golden_test_varying_radii.png'),
+      skip: !Platform.isLinux,
     );
   });
 
@@ -110,7 +113,8 @@ void main() {
 
     await expectLater(
       find.byType(RepaintBoundary),
-      matchesSkiaGoldFile('continuous_rectangle_border.golden_test_large_radii.png'),
+      matchesGoldenFile('continuous_rectangle_border.golden_test_large_radii.png'),
+      skip: !Platform.isLinux,
     );
   });
 

packages/flutter/test/rendering/localized_fonts_test.dart

@@ -2,6 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+import 'dart:io' show Platform;
+
 import 'package:flutter/material.dart';
 import 'package:flutter_test/flutter_test.dart';
 
@@ -49,9 +51,11 @@ void main() {
 
       await expectLater(
         find.byType(RichText),
-        matchesSkiaGoldFile('localized_fonts.rich_text.styled_text_span.png'),
+        matchesGoldenFile('localized_fonts.rich_text.styled_text_span.png'),
+      );
+    },
+    skip: !Platform.isLinux,
   );
-    });
 
   testWidgets(
     'Text with locale-specific glyphs, ambient locale',
@@ -99,9 +103,11 @@ void main() {
 
       await expectLater(
         find.byType(Row),
-        matchesSkiaGoldFile('localized_fonts.text_ambient_locale.chars.png'),
+        matchesGoldenFile('localized_fonts.text_ambient_locale.chars.png'),
+      );
+    },
+    skip: !Platform.isLinux,
   );
-    });
 
   testWidgets(
     'Text with locale-specific glyphs, explicit locale',
@@ -141,8 +147,10 @@ void main() {
 
       await expectLater(
         find.byType(Row),
-        matchesSkiaGoldFile('localized_fonts.text_explicit_locale.chars.png'),
+        matchesGoldenFile('localized_fonts.text_explicit_locale.chars.png'),
+      );
+    },
+    skip: !Platform.isLinux,
   );
-    });
 
 }

packages/flutter/test/widgets/backdrop_filter_test.dart

@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+import 'dart:io';
 import 'dart:ui';
 
 import 'package:flutter/widgets.dart';
@@ -42,7 +43,8 @@ void main() {
     );
     await expectLater(
       find.byType(RepaintBoundary).first,
-      matchesSkiaGoldFile('backdrop_filter_test.cull_rect.png'),
+      matchesGoldenFile('backdrop_filter_test.cull_rect.1.png'),
+      skip: !Platform.isLinux,
     );
   });
 }

packages/flutter/test/widgets/clip_test.dart

@@ -356,7 +356,7 @@ void main() {
     );
     await expectLater(
       find.byType(RepaintBoundary).first,
-      matchesSkiaGoldFile('clip.ClipRect.png'),
+      matchesGoldenFile('clip.ClipRect.1.png'),
     );
   });
 
@@ -396,7 +396,7 @@ void main() {
     );
     await expectLater(
       find.byType(RepaintBoundary).first,
-      matchesSkiaGoldFile('clip.ClipRectOverlay.png'),
+      matchesGoldenFile('clip.ClipRectOverlay.1.png'),
     );
   });
 
@@ -445,7 +445,7 @@ void main() {
     );
     await expectLater(
       find.byType(RepaintBoundary).first,
-      matchesSkiaGoldFile('clip.ClipRRect.png'),
+      matchesGoldenFile('clip.ClipRRect.1.png'),
     );
   });
 
@@ -488,7 +488,7 @@ void main() {
     );
     await expectLater(
       find.byType(RepaintBoundary).first,
-      matchesSkiaGoldFile('clip.ClipOval.png'),
+      matchesGoldenFile('clip.ClipOval.1.png'),
     );
   });
 
@@ -536,7 +536,7 @@ void main() {
     );
     await expectLater(
       find.byType(RepaintBoundary).first,
-      matchesSkiaGoldFile('clip.ClipPath.png'),
+      matchesGoldenFile('clip.ClipPath.1.png'),
     );
   });
 
@@ -581,7 +581,7 @@ void main() {
     await tester.pumpWidget(genPhysicalModel(Clip.antiAlias));
     await expectLater(
       find.byType(RepaintBoundary).first,
-      matchesSkiaGoldFile('clip.PhysicalModel.antiAlias.png'),
+      matchesGoldenFile('clip.PhysicalModel.antiAlias.1.png'),
     );
   });
 
@@ -589,7 +589,7 @@ void main() {
     await tester.pumpWidget(genPhysicalModel(Clip.hardEdge));
     await expectLater(
       find.byType(RepaintBoundary).first,
-      matchesSkiaGoldFile('clip.PhysicalModel.hardEdge.png'),
+      matchesGoldenFile('clip.PhysicalModel.hardEdge.1.png'),
     );
   });
 
@@ -599,7 +599,7 @@ void main() {
     await tester.pumpWidget(genPhysicalModel(Clip.antiAliasWithSaveLayer));
     await expectLater(
       find.byType(RepaintBoundary).first,
-      matchesSkiaGoldFile('clip.PhysicalModel.antiAliasWithSaveLayer.png'),
+      matchesGoldenFile('clip.PhysicalModel.antiAliasWithSaveLayer.png'),
     );
   });
 
@@ -641,7 +641,7 @@ void main() {
     );
     await expectLater(
       find.byType(RepaintBoundary).first,
-      matchesSkiaGoldFile('clip.PhysicalModel.default.png'),
+      matchesGoldenFile('clip.PhysicalModel.default.1.png'),
     );
   });
 
@@ -690,7 +690,7 @@ void main() {
     await tester.pumpWidget(genPhysicalShape(Clip.antiAlias));
     await expectLater(
       find.byType(RepaintBoundary).first,
-      matchesSkiaGoldFile('clip.PhysicalShape.antiAlias.png'),
+      matchesGoldenFile('clip.PhysicalShape.antiAlias.1.png'),
     );
   });
 
@@ -698,7 +698,7 @@ void main() {
     await tester.pumpWidget(genPhysicalShape(Clip.hardEdge));
     await expectLater(
       find.byType(RepaintBoundary).first,
-      matchesSkiaGoldFile('clip.PhysicalShape.hardEdge.png'),
+      matchesGoldenFile('clip.PhysicalShape.hardEdge.1.png'),
     );
   });
 
@@ -706,7 +706,7 @@ void main() {
     await tester.pumpWidget(genPhysicalShape(Clip.antiAliasWithSaveLayer));
     await expectLater(
       find.byType(RepaintBoundary).first,
-      matchesSkiaGoldFile('clip.PhysicalShape.antiAliasWithSaveLayer.png'),
+      matchesGoldenFile('clip.PhysicalShape.antiAliasWithSaveLayer.png'),
     );
   });
 
@@ -752,7 +752,7 @@ void main() {
     );
     await expectLater(
       find.byType(RepaintBoundary).first,
-      matchesSkiaGoldFile('clip.PhysicalShape.default.png'),
+      matchesGoldenFile('clip.PhysicalShape.default.1.png'),
     );
   });
 

packages/flutter/test/widgets/editable_text_cursor_test.dart

@@ -2,6 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+import 'dart:io';
+
 import 'package:flutter/foundation.dart';
 import 'package:flutter/rendering.dart';
 import 'package:flutter_test/flutter_test.dart';
@@ -90,9 +92,9 @@ void main() {
 
     await expectLater(
       find.byKey(const ValueKey<int>(1)),
-      matchesSkiaGoldFile('editable_text_test.0.png'),
+      matchesGoldenFile('editable_text_test.0.3.png'),
     );
-  });
+  }, skip: !Platform.isLinux);
 
   testWidgets('cursor layout has correct radius', (WidgetTester tester) async {
     final GlobalKey<EditableTextState> editableTextKey = GlobalKey<EditableTextState>();
@@ -141,9 +143,9 @@ void main() {
 
     await expectLater(
       find.byKey(const ValueKey<int>(1)),
-      matchesSkiaGoldFile('editable_text_test.1.png'),
+      matchesGoldenFile('editable_text_test.1.3.png'),
     );
-  });
+  }, skip: !Platform.isLinux);
 
   testWidgets('Cursor animates on iOS', (WidgetTester tester) async {
     final Widget widget = MaterialApp(

packages/flutter/test/widgets/invert_colors_test.dart

@@ -2,6 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+import 'dart:io';
+
 import 'package:flutter/rendering.dart';
 import 'package:flutter/widgets.dart';
 import 'package:flutter_test/flutter_test.dart';
@@ -20,7 +22,8 @@ void main() {
 
     await expectLater(
       find.byType(RepaintBoundary),
-      matchesSkiaGoldFile('invert_colors_test.0.png'),
+      matchesGoldenFile('invert_colors_test.0.png'),
+      skip: !Platform.isLinux,
     );
   });
 
@@ -38,7 +41,8 @@ void main() {
 
     await expectLater(
       find.byType(RepaintBoundary),
-      matchesSkiaGoldFile('invert_colors_test.1.png'),
+      matchesGoldenFile('invert_colors_test.1.png'),
+      skip: !Platform.isLinux,
     );
   });
 }

packages/flutter/test/widgets/list_wheel_scroll_view_test.dart

@@ -2,6 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+import 'dart:io';
+
 import 'package:flutter_test/flutter_test.dart';
 import 'package:flutter/foundation.dart';
 import 'package:flutter/rendering.dart';
@@ -535,7 +537,8 @@ void main() {
 
       await expectLater(
         find.byKey(const Key('list_wheel_scroll_view')),
-        matchesSkiaGoldFile('list_wheel_scroll_view.center_child.magnified.png'),
+        matchesGoldenFile('list_wheel_scroll_view.center_child.magnified.png'),
+        skip: !Platform.isLinux,
       );
     });
 
@@ -589,7 +592,8 @@ void main() {
 
       await expectLater(
         find.byKey(const Key('list_wheel_scroll_view')),
-        matchesSkiaGoldFile('list_wheel_scroll_view.curved_wheel.left.png'),
+        matchesGoldenFile('list_wheel_scroll_view.curved_wheel.left.png'),
+        skip: !Platform.isLinux,
       );
     });
 

packages/flutter/test/widgets/opacity_test.dart

@@ -2,6 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+import 'dart:io';
+
 import 'package:flutter/widgets.dart';
 import 'package:flutter_test/flutter_test.dart';
 import 'package:flutter/material.dart';
@@ -177,7 +179,8 @@ void main() {
     );
     await expectLater(
       find.byType(RepaintBoundary).first,
-      matchesSkiaGoldFile('opacity_test.offset.png'),
+      matchesGoldenFile('opacity_test.offset.1.png'),
+      skip: !Platform.isLinux,
     );
   });
 

packages/flutter/test/widgets/physical_model_test.dart

@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+import 'dart:io' show Platform;
 import 'dart:math' as math show pi;
 
 import 'package:flutter/material.dart';
@@ -110,7 +111,8 @@ void main() {
     expect(exception.diagnostics.first.toString(), startsWith('A RenderFlex overflowed by '));
     await expectLater(
       find.byKey(key),
-      matchesSkiaGoldFile('physical_model_overflow.png'),
+      matchesGoldenFile('physical_model_overflow.png'),
+      skip: !Platform.isLinux,
     );
   });
 

packages/flutter/test/widgets/shadow_test.dart

@@ -2,6 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+import 'dart:io' show Platform;
+
 import 'package:flutter_test/flutter_test.dart';
 import 'package:flutter/material.dart';
 
@@ -23,15 +25,18 @@ void main() {
     );
     await expectLater(
       find.byType(Container),
-      matchesSkiaGoldFile('shadow.BoxDecoration.disabled.png'),
+      matchesGoldenFile('shadow.BoxDecoration.disabled.png'),
     );
     debugDisableShadows = false;
     tester.binding.reassembleApplication();
     await tester.pump();
+    if (Platform.isLinux) {
+      // TODO(ianh): use the skip argument instead once that doesn't hang, https://github.com/dart-lang/test/issues/830
       await expectLater(
         find.byType(Container),
-      matchesSkiaGoldFile('shadow.BoxDecoration.enabled.png'),
+        matchesGoldenFile('shadow.BoxDecoration.enabled.png'),
-    );
+      ); // shadows render differently on different platforms
+    }
     debugDisableShadows = true;
   });
 
@@ -56,11 +61,11 @@ void main() {
       await tester.pumpWidget(build(elevation));
       await expectLater(
         find.byType(Container),
-        matchesSkiaGoldFile('shadow.ShapeDecoration.$elevation.png'),
+        matchesGoldenFile('shadow.ShapeDecoration.$elevation.png'),
       );
     }
     debugDisableShadows = true;
-  });
+  }, skip: !Platform.isLinux); // shadows render differently on different platforms
 
   testWidgets('Shadows with PhysicalLayer', (WidgetTester tester) async {
     await tester.pumpWidget(
@@ -83,15 +88,18 @@ void main() {
     );
     await expectLater(
       find.byType(Container),
-      matchesSkiaGoldFile('shadow.PhysicalModel.disabled.0.png'),
+      matchesGoldenFile('shadow.PhysicalModel.disabled.png'),
     );
     debugDisableShadows = false;
     tester.binding.reassembleApplication();
     await tester.pump();
+    if (Platform.isLinux) {
+      // TODO(ianh): use the skip argument instead once that doesn't hang, https://github.com/dart-lang/test/issues/830
       await expectLater(
         find.byType(Container),
-      matchesSkiaGoldFile('shadow.PhysicalModel.enabled.png'),
+        matchesGoldenFile('shadow.PhysicalModel.enabled.png'),
-    );
+      ); // shadows render differently on different platforms
+    }
     debugDisableShadows = true;
   });
 
@@ -120,9 +128,9 @@ void main() {
       await tester.pumpWidget(build(elevation.toDouble()));
       await expectLater(
         find.byType(Container),
-        matchesSkiaGoldFile('shadow.PhysicalModel.disabled.1.$elevation.png'),
+        matchesGoldenFile('shadow.PhysicalShape.$elevation.1.png'),
       );
     }
     debugDisableShadows = true;
-  });
+  }, skip: !Platform.isLinux); // shadows render differently on different platforms
 }

packages/flutter/test/widgets/text_golden_test.dart

@@ -2,6 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+import 'dart:io' show Platform;
+
 import 'package:flutter_test/flutter_test.dart';
 import 'package:flutter/material.dart';
 import 'package:flutter/widgets.dart';
@@ -29,7 +31,7 @@ void main() {
 
     await expectLater(
       find.byType(Container),
-      matchesSkiaGoldFile('text_golden.Centered.png'),
+      matchesGoldenFile('text_golden.Centered.png'),
     );
 
     await tester.pumpWidget(
@@ -53,9 +55,9 @@ void main() {
 
     await expectLater(
       find.byType(Container),
-      matchesSkiaGoldFile('text_golden.Centered.wrap.png'),
+      matchesGoldenFile('text_golden.Centered.wrap.png'),
     );
-  });
+  }, skip: !Platform.isLinux);
 
 
   testWidgets('Text Foreground', (WidgetTester tester) async {
@@ -84,7 +86,7 @@ void main() {
 
     await expectLater(
       find.byType(RepaintBoundary),
-      matchesSkiaGoldFile('text_golden.Foreground.gradient.png'),
+      matchesGoldenFile('text_golden.Foreground.gradient.png'),
     );
 
     await tester.pumpWidget(
@@ -106,7 +108,7 @@ void main() {
 
     await expectLater(
       find.byType(RepaintBoundary),
-      matchesSkiaGoldFile('text_golden.Foreground.stroke.png'),
+      matchesGoldenFile('text_golden.Foreground.stroke.png'),
     );
 
     await tester.pumpWidget(
@@ -129,9 +131,9 @@ void main() {
 
     await expectLater(
       find.byType(RepaintBoundary),
-      matchesSkiaGoldFile('text_golden.Foreground.stroke_and_gradient.png'),
+      matchesGoldenFile('text_golden.Foreground.stroke_and_gradient.png'),
     );
-  });
+  }, skip: !Platform.isLinux);
 
   // TODO(garyq): This test requires an update when the background
   // drawing from the beginning of the line bug is fixed. The current
@@ -179,9 +181,9 @@ void main() {
 
     await expectLater(
       find.byType(RepaintBoundary),
-      matchesSkiaGoldFile('text_golden.Background.png'),
+      matchesGoldenFile('text_golden.Background.png'),
     );
-  });
+  }, skip: !Platform.isLinux);
 
   testWidgets('Text Fade', (WidgetTester tester) async {
     await tester.pumpWidget(
@@ -215,9 +217,9 @@ void main() {
 
     await expectLater(
       find.byType(RepaintBoundary).first,
-      matchesSkiaGoldFile('text_golden.Fade.1.png'),
+      matchesGoldenFile('text_golden.Fade.1.png'),
     );
-  });
+  }, skip: !Platform.isLinux);
 
   testWidgets('Default Strut text', (WidgetTester tester) async {
     await tester.pumpWidget(
@@ -240,9 +242,10 @@ void main() {
     );
     await expectLater(
       find.byType(Container),
-      matchesSkiaGoldFile('text_golden.StrutDefault.png'),
+      matchesGoldenFile('text_golden.StrutDefault.png'),
     );
-  });
+  }, skip: true); // Should only be on linux (skip: !Platform.isLinux).
+                  // Disabled for now until font inconsistency is resolved.
 
   testWidgets('Strut text 1', (WidgetTester tester) async {
     await tester.pumpWidget(
@@ -267,9 +270,10 @@ void main() {
     );
     await expectLater(
       find.byType(Container),
-      matchesSkiaGoldFile('text_golden.Strut.1.png'),
+      matchesGoldenFile('text_golden.Strut.1.1.png'),
     );
-  });
+  }, skip: true); // Should only be on linux (skip: !Platform.isLinux).
+                  // Disabled for now until font inconsistency is resolved.
 
   testWidgets('Strut text 2', (WidgetTester tester) async {
     await tester.pumpWidget(
@@ -295,9 +299,10 @@ void main() {
     );
     await expectLater(
       find.byType(Container),
-      matchesSkiaGoldFile('text_golden.Strut.2.png'),
+      matchesGoldenFile('text_golden.Strut.2.1.png'),
     );
-  });
+  }, skip: true); // Should only be on linux (skip: !Platform.isLinux).
+                  // Disabled for now until font inconsistency is resolved.
 
   testWidgets('Strut text rich', (WidgetTester tester) async {
     await tester.pumpWidget(
@@ -346,9 +351,10 @@ void main() {
     );
     await expectLater(
       find.byType(Container),
-      matchesSkiaGoldFile('text_golden.Strut.3.png'),
+      matchesGoldenFile('text_golden.Strut.3.1.png'),
     );
-  });
+  }, skip: true); // Should only be on linux (skip: !Platform.isLinux).
+                  // Disabled for now until font inconsistency is resolved.
 
   testWidgets('Strut text font fallback', (WidgetTester tester) async {
     // Font Fallback
@@ -381,9 +387,10 @@ void main() {
     );
     await expectLater(
       find.byType(Container),
-      matchesSkiaGoldFile('text_golden.Strut.4.png'),
+      matchesGoldenFile('text_golden.Strut.4.1.png'),
     );
-  });
+  }, skip: true); // Should only be on linux (skip: !Platform.isLinux).
+                  // Disabled for now until font inconsistency is resolved.
 
   testWidgets('Strut text rich forceStrutHeight', (WidgetTester tester) async {
     await tester.pumpWidget(
@@ -432,9 +439,10 @@ void main() {
     );
     await expectLater(
       find.byType(Container),
-      matchesSkiaGoldFile('text_golden.StrutForce.1.png'),
+      matchesGoldenFile('text_golden.StrutForce.1.1.png'),
     );
-  });
+  }, skip: true); // Should only be on linux (skip: !Platform.isLinux).
+                  // Disabled for now until font inconsistency is resolved.
 
   testWidgets('Decoration thickness', (WidgetTester tester) async {
     final TextDecoration allDecorations = TextDecoration.combine(
@@ -470,9 +478,9 @@ void main() {
     );
     await expectLater(
       find.byType(Container),
-      matchesSkiaGoldFile('text_golden.Decoration.1.png'),
+      matchesGoldenFile('text_golden.Decoration.1.0.png'),
     );
-  });
+  }, skip: !Platform.isLinux); // Coretext uses different thicknesses for decoration
 
   testWidgets('Decoration thickness', (WidgetTester tester) async {
     final TextDecoration allDecorations = TextDecoration.combine(
@@ -509,7 +517,7 @@ void main() {
     );
     await expectLater(
       find.byType(Container),
-      matchesSkiaGoldFile('text_golden.DecorationThickness.1.png'),
+      matchesGoldenFile('text_golden.DecorationThickness.1.0.png'),
     );
-  });
+  }, skip: !Platform.isLinux); // Coretext uses different thicknesses for decoration
 }

packages/flutter/test/widgets/widget_inspector_test.dart

@@ -1896,7 +1896,8 @@ class TestWidgetInspectorService extends Object with WidgetInspectorService {
       expect(expectedChildLayerCount, equals(2));
       await expectLater(
         layer.toImage(renderObject.semanticBounds.inflate(50.0)),
-        matchesSkiaGoldFile('inspector.repaint_boundary_margin.png'),
+        matchesGoldenFile('inspector.repaint_boundary_margin.png'),
+        skip: !Platform.isLinux,
       );
 
       // Regression test for how rendering with a pixel scale other than 1.0
@@ -1906,7 +1907,8 @@ class TestWidgetInspectorService extends Object with WidgetInspectorService {
           renderObject.semanticBounds.inflate(50.0),
           pixelRatio: 0.5,
         ),
-        matchesSkiaGoldFile('inspector.repaint_boundary_margin_small.png'),
+        matchesGoldenFile('inspector.repaint_boundary_margin_small.png'),
+        skip: !Platform.isLinux,
       );
 
       await expectLater(
@@ -1914,7 +1916,8 @@ class TestWidgetInspectorService extends Object with WidgetInspectorService {
           renderObject.semanticBounds.inflate(50.0),
           pixelRatio: 2.0,
         ),
-        matchesSkiaGoldFile('inspector.repaint_boundary_margin_large.png'),
+        matchesGoldenFile('inspector.repaint_boundary_margin_large.png'),
+        skip: !Platform.isLinux,
       );
 
       final Layer layerParent = layer.parent;
@@ -1929,7 +1932,8 @@ class TestWidgetInspectorService extends Object with WidgetInspectorService {
           width: 300.0,
           height: 300.0,
         ),
-        matchesSkiaGoldFile('inspector.repaint_boundary.png'),
+        matchesGoldenFile('inspector.repaint_boundary.png'),
+        skip: !Platform.isLinux,
       );
 
       // Verify that taking a screenshot didn't change the layers associated with
@@ -1946,7 +1950,8 @@ class TestWidgetInspectorService extends Object with WidgetInspectorService {
           height: 500.0,
           margin: 50.0,
         ),
-        matchesSkiaGoldFile('inspector.repaint_boundary_margin.png'),
+        matchesGoldenFile('inspector.repaint_boundary_margin.png'),
+        skip: !Platform.isLinux,
       );
 
       // Verify that taking a screenshot didn't change the layers associated with
@@ -1966,7 +1971,8 @@ class TestWidgetInspectorService extends Object with WidgetInspectorService {
           height: 300.0,
           debugPaint: true,
         ),
-        matchesSkiaGoldFile('inspector.repaint_boundary_debugPaint.png'),
+        matchesGoldenFile('inspector.repaint_boundary_debugPaint.png'),
+        skip: !Platform.isLinux,
       );
       // Verify that taking a screenshot with debug paint on did not change
       // the number of children the layer has.
@@ -1976,7 +1982,8 @@ class TestWidgetInspectorService extends Object with WidgetInspectorService {
       // hasn't changed the regular render of the widget.
       await expectLater(
         find.byType(RepaintBoundaryWithDebugPaint),
-        matchesSkiaGoldFile('inspector.repaint_boundary.png'),
+        matchesGoldenFile('inspector.repaint_boundary.png'),
+        skip: !Platform.isLinux,
       );
 
       expect(renderObject.debugLayer, equals(layer));
@@ -1989,7 +1996,8 @@ class TestWidgetInspectorService extends Object with WidgetInspectorService {
           width: 100.0,
           height: 100.0,
         ),
-        matchesSkiaGoldFile('inspector.container.png'),
+        matchesGoldenFile('inspector.container.png'),
+        skip: !Platform.isLinux,
       );
 
       await expectLater(
@@ -1999,7 +2007,8 @@ class TestWidgetInspectorService extends Object with WidgetInspectorService {
           height: 100.0,
           debugPaint: true,
         ),
-        matchesSkiaGoldFile('inspector.container_debugPaint.png'),
+        matchesGoldenFile('inspector.container_debugPaint.png'),
+        skip: !Platform.isLinux,
       );
 
       {
@@ -2019,7 +2028,8 @@ class TestWidgetInspectorService extends Object with WidgetInspectorService {
             height: 100.0,
             debugPaint: true,
           ),
-          matchesSkiaGoldFile('inspector.container_debugPaint.png'),
+          matchesGoldenFile('inspector.container_debugPaint.png'),
+          skip: !Platform.isLinux,
         );
         expect(container.debugNeedsLayout, isFalse);
       }
@@ -2031,7 +2041,8 @@ class TestWidgetInspectorService extends Object with WidgetInspectorService {
           width: 50.0,
           height: 100.0,
         ),
-        matchesSkiaGoldFile('inspector.container_small.png'),
+        matchesGoldenFile('inspector.container_small.png'),
+        skip: !Platform.isLinux,
       );
 
       await expectLater(
@@ -2041,7 +2052,8 @@ class TestWidgetInspectorService extends Object with WidgetInspectorService {
           height: 400.0,
           maxPixelRatio: 3.0,
         ),
-        matchesSkiaGoldFile('inspector.container_large.png'),
+        matchesGoldenFile('inspector.container_large.png'),
+        skip: !Platform.isLinux,
       );
 
       // This screenshot will show the clip rect debug paint but no other
@@ -2053,7 +2065,8 @@ class TestWidgetInspectorService extends Object with WidgetInspectorService {
           height: 100.0,
           debugPaint: true,
         ),
-        matchesSkiaGoldFile('inspector.clipRect_debugPaint.png'),
+        matchesGoldenFile('inspector.clipRect_debugPaint.png'),
+        skip: !Platform.isLinux,
       );
 
       final Element clipRect = find.byType(ClipRRect).evaluate().single;
@@ -2067,10 +2080,10 @@ class TestWidgetInspectorService extends Object with WidgetInspectorService {
       );
       // Add a margin so that the clip icon shows up in the screenshot.
       // This golden image is platform dependent due to the clip icon.
-      final String platform = Platform.operatingSystem;
       await expectLater(
         clipRectScreenshot,
-        matchesSkiaGoldFile('inspector.clipRect_debugPaint_margin.$platform.png'),
+        matchesGoldenFile('inspector.clipRect_debugPaint_margin.png'),
+        skip: !Platform.isLinux,
       );
 
       // Verify we get the same image if we go through the service extension
@@ -2109,7 +2122,8 @@ class TestWidgetInspectorService extends Object with WidgetInspectorService {
           height: 300.0,
           debugPaint: true,
         ),
-        matchesSkiaGoldFile('inspector.padding_debugPaint.png'),
+        matchesGoldenFile('inspector.padding_debugPaint.png'),
+        skip: !Platform.isLinux,
       );
 
       // The bounds for this box crop its rendered content.
@@ -2120,7 +2134,8 @@ class TestWidgetInspectorService extends Object with WidgetInspectorService {
           height: 300.0,
           debugPaint: true,
         ),
-        matchesSkiaGoldFile('inspector.sizedBox_debugPaint.png'),
+        matchesGoldenFile('inspector.sizedBox_debugPaint.1.png'),
+        skip: !Platform.isLinux,
       );
 
       // Verify that setting a margin includes the previously cropped content.
@@ -2132,7 +2147,8 @@ class TestWidgetInspectorService extends Object with WidgetInspectorService {
           margin: 50.0,
           debugPaint: true,
         ),
-        matchesSkiaGoldFile('inspector.sizedBox_debugPaint_margin.png'),
+        matchesGoldenFile('inspector.sizedBox_debugPaint_margin.png'),
+        skip: !Platform.isLinux,
       );
     });
 
@@ -2203,7 +2219,8 @@ class TestWidgetInspectorService extends Object with WidgetInspectorService {
 
       await expectLater(
         find.byKey(mainStackKey),
-        matchesSkiaGoldFile('inspector.composited_transform.only_offsets.png'),
+        matchesGoldenFile('inspector.composited_transform.only_offsets.png'),
+        skip: !Platform.isLinux,
       );
 
       await expectLater(
@@ -2212,12 +2229,14 @@ class TestWidgetInspectorService extends Object with WidgetInspectorService {
           width: 5000.0,
           height: 500.0,
         ),
-        matchesSkiaGoldFile('inspector.composited_transform.only_offsets_follower.png'),
+        matchesGoldenFile('inspector.composited_transform.only_offsets_follower.png'),
+        skip: !Platform.isLinux,
       );
 
       await expectLater(
         WidgetInspectorService.instance.screenshot(find.byType(Stack).evaluate().first, width: 300.0, height: 300.0),
-        matchesSkiaGoldFile('inspector.composited_transform.only_offsets_small.png'),
+        matchesGoldenFile('inspector.composited_transform.only_offsets_small.1.png'),
+        skip: !Platform.isLinux,
       );
 
       await expectLater(
@@ -2226,7 +2245,8 @@ class TestWidgetInspectorService extends Object with WidgetInspectorService {
           width: 500.0,
           height: 500.0,
         ),
-        matchesSkiaGoldFile('inspector.composited_transform.only_offsets_target.png'),
+        matchesGoldenFile('inspector.composited_transform.only_offsets_target.png'),
+        skip: !Platform.isLinux,
       );
     });
 
@@ -2298,7 +2318,8 @@ class TestWidgetInspectorService extends Object with WidgetInspectorService {
       // screenshots of specific subtrees are reasonable.
       await expectLater(
         find.byKey(mainStackKey),
-        matchesSkiaGoldFile('inspector.composited_transform.with_rotations.png'),
+        matchesGoldenFile('inspector.composited_transform.with_rotations.png'),
+        skip: !Platform.isLinux,
       );
 
       await expectLater(
@@ -2307,7 +2328,8 @@ class TestWidgetInspectorService extends Object with WidgetInspectorService {
           width: 500.0,
           height: 500.0,
         ),
-        matchesSkiaGoldFile('inspector.composited_transform.with_rotations_small.png'),
+        matchesGoldenFile('inspector.composited_transform.with_rotations_small.png'),
+        skip: !Platform.isLinux,
       );
 
       await expectLater(
@@ -2316,7 +2338,8 @@ class TestWidgetInspectorService extends Object with WidgetInspectorService {
           width: 500.0,
           height: 500.0,
         ),
-        matchesSkiaGoldFile('inspector.composited_transform.with_rotations_target.png'),
+        matchesGoldenFile('inspector.composited_transform.with_rotations_target.png'),
+        skip: !Platform.isLinux,
       );
 
       await expectLater(
@@ -2325,7 +2348,8 @@ class TestWidgetInspectorService extends Object with WidgetInspectorService {
           width: 500.0,
           height: 500.0,
         ),
-        matchesSkiaGoldFile('inspector.composited_transform.with_rotations_follower.png'),
+        matchesGoldenFile('inspector.composited_transform.with_rotations_follower.png'),
+        skip: !Platform.isLinux,
       );
 
       // Make sure taking screenshots hasn't modified the positions of the

packages/flutter_goldens/lib/flutter_goldens.dart

@@ -3,20 +3,16 @@
 // found in the LICENSE file.
 
 import 'dart:async';
-import 'dart:io';
 import 'dart:typed_data';
 
 import 'package:file/file.dart';
 import 'package:file/local.dart';
 import 'package:flutter_test/flutter_test.dart';
 import 'package:meta/meta.dart';
-import 'package:test_api/test_api.dart' as test_package show TestFailure;
 
 import 'package:flutter_goldens_client/client.dart';
 export 'package:flutter_goldens_client/client.dart';
 
-const String _kFlutterRootKey = 'FLUTTER_ROOT';
-
 /// Main method that can be used in a `flutter_test_config.dart` file to set
 /// [goldenFileComparator] to an instance of [FlutterGoldenFileComparator] that
 /// works for the current test.
@@ -29,12 +25,12 @@ Future<void> main(FutureOr<void> testMain()) async {
 ///
 /// Within the https://github.com/flutter/flutter repository, it's important
 /// not to check-in binaries in order to keep the size of the repository to a
-/// minimum. To satisfy this requirement, this comparator uses the
+/// minimum. To satisfy this requirement, this comparator retrieves the golden
-/// [SkiaGoldClient] to upload widgets for framework-related golden tests and
+/// files from a sibling repository, `flutter/goldens`.
-/// process results.
 ///
-/// This comparator will instantiate the [SkiaGoldClient] and process the
+/// This comparator will locally clone the `flutter/goldens` repository into
-/// results of the test.
+/// the `$FLUTTER_ROOT/bin/cache/pkg/goldens` folder, then perform the comparison against
+/// the files therein.
 class FlutterGoldenFileComparator implements GoldenFileComparator {
   /// Creates a [FlutterGoldenFileComparator] that will resolve golden file
   /// URIs relative to the specified [basedir].
@@ -53,51 +49,48 @@ class FlutterGoldenFileComparator implements GoldenFileComparator {
   @visibleForTesting
   final FileSystem fs;
 
-  /// Instance of the [SkiaGoldClient] for executing tests.
-  final SkiaGoldClient _skiaClient = SkiaGoldClient();
-
   /// Creates a new [FlutterGoldenFileComparator] that mirrors the relative
   /// path resolution of the default [goldenFileComparator].
   ///
-  /// The [defaultComparator] parameter is visible for testing
+  /// By the time the future completes, the clone of the `flutter/goldens`
+  /// repository is guaranteed to be ready use.
+  ///
+  /// The [goldens] and [defaultComparator] parameters are visible for testing
   /// purposes only.
   static Future<FlutterGoldenFileComparator> fromDefaultComparator({
+    GoldensClient goldens,
     LocalFileComparator defaultComparator,
   }) async {
     defaultComparator ??= goldenFileComparator;
 
+    // Prepare the goldens repo.
+    goldens ??= GoldensClient();
+    await goldens.prepare();
+
     // Calculate the appropriate basedir for the current test context.
-    const FileSystem fs = LocalFileSystem();
+    final FileSystem fs = goldens.fs;
     final Directory testDirectory = fs.directory(defaultComparator.basedir);
-    final Directory flutterRoot = fs.directory(Platform.environment[_kFlutterRootKey]);
+    final String testDirectoryRelativePath = fs.path.relative(testDirectory.path, from: goldens.flutterRoot.path);
-    final Directory goldenRoot = flutterRoot.childDirectory(fs.path.join(
+    return FlutterGoldenFileComparator(goldens.repositoryRoot.childDirectory(testDirectoryRelativePath).uri);
-      'bin',
-      'cache',
-      'pkg',
-      'goldens',
-    ));
-    final String testDirectoryRelativePath = fs.path.relative(
-      testDirectory.path,
-      from: flutterRoot.path,
-    );
-    return FlutterGoldenFileComparator(goldenRoot.childDirectory(testDirectoryRelativePath).uri);
   }
 
   @override
   Future<bool> compare(Uint8List imageBytes, Uri golden) async {
     final File goldenFile = _getGoldenFile(golden);
     if (!goldenFile.existsSync()) {
-      throw test_package.TestFailure('Could not be compared against non-existent file: "$golden"');
+      throw TestFailure('Could not be compared against non-existent file: "$golden"');
+    }
+    final List<int> goldenBytes = await goldenFile.readAsBytes();
+    // TODO(tvolkert): Improve the intelligence of this comparison.
+    if (goldenBytes.length != imageBytes.length) {
+      return false;
+    }
+    for (int i = 0; i < goldenBytes.length; i++) {
+      if (goldenBytes[i] != imageBytes[i]) {
+        return false;
+      }
     }
-    final bool authorized = await _skiaClient.auth(fs.directory(basedir));
-    if (!authorized) {
-      // TODO(Piinks): Clean up for final implementation on CI, https://github.com/flutter/flutter/pull/31630
     return true;
-      //throw test_package.TestFailure('Could not authorize golctl.');
-    }
-    await _skiaClient.imgtestInit();
-
-    return await _skiaClient.imgtestAdd(golden.path, goldenFile);
   }
 
   @override

packages/flutter_goldens/test/flutter_goldens_test.dart

@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+import 'dart:io' as io;
 import 'dart:typed_data';
 
 import 'package:file/file.dart';
@@ -13,57 +14,49 @@ import 'package:platform/platform.dart';
 import 'package:process/process.dart';
 
 const String _kFlutterRoot = '/flutter';
-//const String _kGoldenRoot = '$_kFlutterRoot/bin/cache/pkg/goldens';
+const String _kRepositoryRoot = '$_kFlutterRoot/bin/cache/pkg/goldens';
-//const String _kVersionFile = '$_kFlutterRoot/bin/internal/goldens.version';
+const String _kVersionFile = '$_kFlutterRoot/bin/internal/goldens.version';
-//const String _kGoldensVersion = '123456abcdef';
+const String _kGoldensVersion = '123456abcdef';
-// TODO(Piinks): Finish testing, https://github.com/flutter/flutter/pull/31630
+
 void main() {
   MemoryFileSystem fs;
   FakePlatform platform;
   MockProcessManager process;
-  //Directory flutter;
-  //Directory golden;
-
-  setUp(() async {
-    fs = MemoryFileSystem();
-    platform = FakePlatform(environment: <String, String>{
-      'FLUTTER_ROOT': _kFlutterRoot,
-      // TODO(Piinks): Add other env vars for testing, https://github.com/flutter/flutter/pull/31630
-    });
-    process = MockProcessManager();
-    //flutter = await fs.directory(_kFlutterRoot).create(recursive: true);
-    //golden = await fs.directory(_kGoldenRoot).create(recursive: true);
-    //fs.file(_kVersionFile).createSync(recursive: true);
-    //fs.file(_kVersionFile).writeAsStringSync(_kGoldensVersion);
-  });
-
-  group('SkiaGoldClient', () {
-    //SkiaGoldClient skiaGold;
 
   setUp(() {
-      //skiaGold =
+    fs = MemoryFileSystem();
-        SkiaGoldClient(
+    platform = FakePlatform(environment: <String, String>{'FLUTTER_ROOT': _kFlutterRoot});
+    process = MockProcessManager();
+    fs.directory(_kFlutterRoot).createSync(recursive: true);
+    fs.directory(_kRepositoryRoot).createSync(recursive: true);
+    fs.file(_kVersionFile).createSync(recursive: true);
+    fs.file(_kVersionFile).writeAsStringSync(_kGoldensVersion);
+  });
+
+  group('GoldensClient', () {
+    GoldensClient goldens;
+
+    setUp(() {
+      goldens = GoldensClient(
         fs: fs,
         platform: platform,
         process: process,
       );
     });
 
-    group('auth', () {
+    group('prepare', () {
-      // check for successful auth - return true
+      test('performs minimal work if versions match', () async {
-      // check for unsuccessful auth - throw NonZeroExitCode
+        when(process.run(any, workingDirectory: anyNamed('workingDirectory')))
-      // check for unavailable auth (not on CI) - return false
+            .thenAnswer((_) => Future<io.ProcessResult>.value(io.ProcessResult(123, 0, _kGoldensVersion, '')));
-      // check for redundant work
+        await goldens.prepare();
+
+        // Verify that we only spawned `git rev-parse HEAD`
+        final VerificationResult verifyProcessRun =
+            verify(process.run(captureAny, workingDirectory: captureAnyNamed('workingDirectory')));
+        verifyProcessRun.called(1);
+        expect(verifyProcessRun.captured.first, <String>['git', 'rev-parse', 'HEAD']);
+        expect(verifyProcessRun.captured.last, _kRepositoryRoot);
       });
-
-    group('init', () {
-      // check for successful init - return true
-      // check for unsuccessful init - throw NonZeroExitCode
-      // Check for redundant work
-    });
-
-    group('imgtest', () {
-
     });
   });
 
@@ -81,22 +74,21 @@ void main() {
 
     group('fromDefaultComparator', () {
       test('calculates the basedir correctly', () async {
-//        final MockSkiaGoldClient skiaGold = MockSkiaGoldClient();
+        final MockGoldensClient goldens = MockGoldensClient();
-//        final MockLocalFileComparator defaultComparator = MockLocalFileComparator();
+        final MockLocalFileComparator defaultComparator = MockLocalFileComparator();
-//        final Directory flutterRoot = fs.directory('/foo')..createSync(recursive: true);
+        final Directory flutterRoot = fs.directory('/foo')..createSync(recursive: true);
-//        final Directory skiaGoldRoot = flutterRoot.childDirectory('bar')..createSync(recursive: true);
+        final Directory goldensRoot = flutterRoot.childDirectory('bar')..createSync(recursive: true);
-//        when(skiaGold.fs).thenReturn(fs);
+        when(goldens.fs).thenReturn(fs);
-//        when(skiaGold.flutterRoot).thenReturn(flutterRoot);
+        when(goldens.flutterRoot).thenReturn(flutterRoot);
-//        when(skiaGold.repositoryRoot).thenReturn(skiaGoldRoot);
+        when(goldens.repositoryRoot).thenReturn(goldensRoot);
-//        when(defaultComparator.basedir).thenReturn(flutterRoot.childDirectory('baz').uri);
+        when(defaultComparator.basedir).thenReturn(flutterRoot.childDirectory('baz').uri);
-//        comparator = await FlutterGoldenFileComparator.fromDefaultComparator(
+        comparator = await FlutterGoldenFileComparator.fromDefaultComparator(
-//            goldens: goldens, defaultComparator: defaultComparator);
+            goldens: goldens, defaultComparator: defaultComparator);
-//        expect(comparator.basedir, fs.directory('/foo/bar/baz').uri);
+        expect(comparator.basedir, fs.directory('/foo/bar/baz').uri);
       });
     });
 
     group('compare', () {
-
       test('throws if golden file is not found', () async {
         try {
           await comparator.compare(Uint8List.fromList(<int>[1, 2, 3]), Uri.parse('test.png'));
@@ -106,32 +98,21 @@ void main() {
         }
       });
 
-      // TODO(Piinks): This is currently disabled in flutter_goldens.dart, https://github.com/flutter/flutter/pull/31630
+      test('returns false if golden bytes do not match', () async {
-//      test('throws if goldctl has not been authorized', () async {
+        final File goldenFile = fs.file('/path/to/flutter/bin/cache/goldens/test/foo/bar/test.png')
-//        // See that preceding test does not leave auth behind [52]
+          ..createSync(recursive: true);
-//        try {
+        goldenFile.writeAsBytesSync(<int>[4, 5, 6], flush: true);
-//          await comparator.compare(Uint8List.fromList(<int>[1, 2, 3]), Uri.parse('test.png'));
+        final bool result = await comparator.compare(Uint8List.fromList(<int>[1, 2, 3]), Uri.parse('test.png'));
-//          fail('TestFailure expected but not thrown');
+        expect(result, isFalse);
-//        } on TestFailure catch (error) {
+      });
-//          expect(error.message, contains('Could not authorize goldctl.'));
+
-//        }
+      test('returns true if golden bytes match', () async {
-//      });
+        final File goldenFile = fs.file('/path/to/flutter/bin/cache/goldens/test/foo/bar/test.png')
-      // TODO(Piinks): Add methods to Mock SkiaGoldClient to inform the comparator and test for proper behavior. See matcher_test.dart for model, https://github.com/flutter/flutter/pull/31630
+          ..createSync(recursive: true);
-//      test('returns false if skia gold test fails', () async {
+        goldenFile.writeAsBytesSync(<int>[1, 2, 3], flush: true);
-//        final File goldenFile = fs.file('/path/to/flutter/bin/cache/goldens/test/foo/bar/test.png')
+        final bool result = await comparator.compare(Uint8List.fromList(<int>[1, 2, 3]), Uri.parse('test.png'));
-//          ..createSync(recursive: true);
+        expect(result, isTrue);
-//        goldenFile.writeAsBytesSync(<int>[4, 5, 6], flush: true);
+      });
-//        final bool result = await comparator.compare(Uint8List.fromList(<int>[1, 2, 3]), Uri.parse('test.png'));
-//        expect(result, isFalse);
-//      });
-//
-//      test('returns true if skia gold test passes', () async {
-//        final File goldenFile = fs.file('/path/to/flutter/bin/cache/goldens/test/foo/bar/test.png')
-//          ..createSync(recursive: true);
-//        goldenFile.writeAsBytesSync(<int>[1, 2, 3], flush: true);
-//        final bool result = await comparator.compare(Uint8List.fromList(<int>[1, 2, 3]), Uri.parse('test.png'));
-//        expect(result, isTrue);
-//      });
     });
 
     group('update', () {
@@ -155,5 +136,5 @@ void main() {
 }
 
 class MockProcessManager extends Mock implements ProcessManager {}
-class MockSkiaGoldClient extends Mock implements SkiaGoldClient {}
+class MockGoldensClient extends Mock implements GoldensClient {}
 class MockLocalFileComparator extends Mock implements LocalFileComparator {}

packages/flutter_goldens_client/lib/client.dart

@@ -3,12 +3,10 @@
 // found in the LICENSE file.
 
 import 'dart:async';
-import 'dart:convert' as convert;
 import 'dart:io' as io;
 
 import 'package:file/file.dart';
 import 'package:file/local.dart';
-import 'package:path/path.dart' as path;
 import 'package:platform/platform.dart';
 import 'package:process/process.dart';
 
@@ -17,210 +15,163 @@ import 'package:process/process.dart';
 // https://github.com/flutter/flutter/wiki/Writing-a-golden-file-test-for-package%3Aflutter
 
 const String _kFlutterRootKey = 'FLUTTER_ROOT';
-const String _kGoldctlKey = 'GOLDCTL';
-const String _kServiceAccountKey = 'GOLD_SERVICE_ACCOUNT';
-const String _kSkiaGoldInstance = 'SKIA_GOLD_INSTANCE';
 
-/// A class that represents the Skia Gold client for golden file testing.
+/// A class that represents a clone of the https://github.com/flutter/goldens
-class SkiaGoldClient {
+/// repository, nested within the `bin/cache` directory of the caller's Flutter
-  /// Create a  handle to a local workspace for the Skia Gold Client.
+/// repository.
-  SkiaGoldClient({
+class GoldensClient {
+  /// Create a handle to a local clone of the goldens repository.
+  GoldensClient({
     this.fs = const LocalFileSystem(),
     this.platform = const LocalPlatform(),
     this.process = const LocalProcessManager(),
   });
 
-  /// The file system to use for storing local files for running imgtests.
+  /// The file system to use for storing the local clone of the repository.
   ///
-  /// This is useful in tests, where a local file system (the default) can be
+  /// This is useful in tests, where a local file system (the default) can
-  /// replaced by a memory file system.
+  /// be replaced by a memory file system.
   final FileSystem fs;
 
   /// A wrapper for the [dart:io.Platform] API.
   ///
-  /// This is useful in tests, where the system platform (the default) can be
+  /// This is useful in tests, where the system platform (the default) can
-  /// replaced by a mock platform instance.
+  /// be replaced by a mock platform instance.
   final Platform platform;
 
-  /// A controller for launching sub-processes.
+  /// A controller for launching subprocesses.
   ///
-  /// This is useful in tests, where the real process manager (the default) can
+  /// This is useful in tests, where the real process manager (the default)
-  /// be replaced by a mock process manager that doesn't really create
+  /// can be replaced by a mock process manager that doesn't really create
-  /// sub-processes.
+  /// subprocesses.
   final ProcessManager process;
 
-  Directory _workDirectory;
+  RandomAccessFile _lock;
 
-  // TODO(Piinks): Environment variables are temporary for local testing, https://github.com/flutter/flutter/pull/31630
   /// The local [Directory] where the Flutter repository is hosted.
   ///
   /// Uses the [fs] file system.
   Directory get flutterRoot => fs.directory(platform.environment[_kFlutterRootKey]);
 
-  /// The [path] to the local [Directory] where the goldctl tool is hosted.
+  /// The local [Directory] where the goldens repository is hosted.
   ///
-  /// Uses the [platform] [environment] in this iteration.
+  /// Uses the [fs] file system.
-  String get _goldctl => platform.environment[_kGoldctlKey];
+  Directory get repositoryRoot => flutterRoot.childDirectory(fs.path.join('bin', 'cache', 'pkg', 'goldens'));
 
-  /// The [path] to the local [Directory] where the service account key is
+  /// Prepares the local clone of the `flutter/goldens` repository for golden
-  /// hosted.
+  /// file testing.
   ///
-  /// Uses the [platform] [environment] in this iteration.
+  /// This ensures that the goldens repository has been cloned into its
-  String get _serviceAccount => platform.environment[_kServiceAccountKey];
+  /// expected location within `bin/cache` and that it is synced to the Git
-
+  /// revision specified in `bin/internal/goldens.version`.
-  /// The name of the Skia Gold Flutter instance.
   ///
-  /// Uses the [platform] [environment] in this iteration.
+  /// While this is preparing the repository, it obtains a file lock such that
-  String get _skiaGoldInstance => platform.environment[_kSkiaGoldInstance];
+  /// [GoldensClient] instances in other processes or isolates will not
+  /// duplicate the work that this is doing.
+  Future<void> prepare() async {
+    final String goldensCommit = await _getGoldensCommit();
+    String currentCommit = await _getCurrentCommit();
+    if (currentCommit != goldensCommit) {
+      await _obtainLock();
+      try {
+        // Check the current commit again now that we have the lock.
+        currentCommit = await _getCurrentCommit();
+        if (currentCommit != goldensCommit) {
+          if (currentCommit == null) {
+            await _initRepository();
+          }
+          await _checkCanSync();
+          await _syncTo(goldensCommit);
+        }
+      } finally {
+        await _releaseLock();
+      }
+    }
+  }
 
-  /// Prepares the local work space for golden file testing and initializes the
+  Future<String> _getGoldensCommit() async {
-  /// goldctl authorization for executing tests.
+    final File versionFile = flutterRoot.childFile(fs.path.join('bin', 'internal', 'goldens.version'));
-  ///
+    return (await versionFile.readAsString()).trim();
-  /// This ensures that the goldctl tool is authorized and ready for testing.
+  }
-  Future<bool> auth(Directory workDirectory) async {
-    _workDirectory = workDirectory;
 
-    // TODO(Piinks): Cleanup for final CI implementation, https://github.com/flutter/flutter/pull/31630
+  Future<String> _getCurrentCommit() async {
-    if (_serviceAccount == null)
+    if (!repositoryRoot.existsSync()) {
-      return false; // Not in the proper environment for golden file testing.
+      return null;
-
+    } else {
-    final File authFile = _workDirectory.childFile(fs.path.join(
+      final io.ProcessResult revParse = await process.run(
-      'temp',
+        <String>['git', 'rev-parse', 'HEAD'],
-      'auth_opt.json'
+        workingDirectory: repositoryRoot.path,
-    ));
-    if (!authFile.existsSync()) {
-      final List<String> authArguments = <String>[
-        'auth',
-        '--service-account', _serviceAccount,
-        '--work-dir', _workDirectory.childDirectory('temp').path,
-      ];
-
-      final io.ProcessResult authResults = io.Process.runSync(
-        _goldctl,
-        authArguments
       );
-      if (authResults.exitCode != 0) {
+      return revParse.exitCode == 0 ? revParse.stdout.trim() : null;
+    }
+  }
+
+  Future<void> _initRepository() async {
+    await repositoryRoot.create(recursive: true);
+    await _runCommands(
+      <String>[
+        'git init',
+        'git remote add upstream https://github.com/flutter/goldens.git',
+        'git remote set-url --push upstream git@github.com:flutter/goldens.git',
+      ],
+      workingDirectory: repositoryRoot,
+    );
+  }
+
+  Future<void> _checkCanSync() async {
+    final io.ProcessResult result = await process.run(
+      <String>['git', 'status', '--porcelain'],
+      workingDirectory: repositoryRoot.path,
+    );
+    if (result.stdout.trim().isNotEmpty) {
       final StringBuffer buf = StringBuffer();
       buf
-          ..writeln('Flutter + Skia Gold auth failed.')
+        ..writeln('flutter_goldens git checkout at ${repositoryRoot.path} has local changes and cannot be synced.')
-          ..writeln('stdout: ${authResults.stdout}')
+        ..writeln('To reset your client to a clean state, and lose any local golden test changes:')
-          ..writeln('stderr: ${authResults.stderr}');
+        ..writeln('cd ${repositoryRoot.path}')
-        throw NonZeroExitCode(authResults.exitCode, buf.toString());
+        ..writeln('git reset --hard HEAD')
-      }
+        ..writeln('git clean -x -d -f -f');
-    }
-    return true;
-  }
-
-  Future<void> imgtestInit() async {
-    final File keysFile = _workDirectory.childFile('keys.json');
-
-    if(!keysFile.existsSync() || await _isNewCommit()) {
-      final String commitHash = await _getCommitHash();
-      final String keys = '${_workDirectory.path}keys.json';
-      final String failures = '${_workDirectory.path}failures.json';
-
-      await io.File(keys).writeAsString(_getKeysJSON());
-      await io.File(failures).create();
-
-      final List<String> imgtestInitArguments = <String>[
-        'imgtest', 'init',
-        '--instance', _skiaGoldInstance,
-        '--work-dir', _workDirectory.childDirectory('temp').path,
-        '--commit', commitHash,
-        '--keys-file', keys,
-        '--failure-file', failures,
-        '--passfail',
-      ];
-
-      if(imgtestInitArguments.contains(null)) {
-        final StringBuffer buf = StringBuffer();
-        buf.writeln('Null argument for Skia Gold imgtest init:');
-        imgtestInitArguments.forEach(buf.writeln);
       throw NonZeroExitCode(1, buf.toString());
     }
+  }
 
-      final io.ProcessResult imgtestInitResult = io.Process.runSync(
+  Future<void> _syncTo(String commit) async {
-        _goldctl,
+    await _runCommands(
-        imgtestInitArguments,
+      <String>[
+        'git pull upstream master',
+        'git fetch upstream $commit',
+        'git reset --hard FETCH_HEAD',
+      ],
+      workingDirectory: repositoryRoot,
     );
-
-      if (imgtestInitResult.exitCode != 0) {
-        final StringBuffer buf = StringBuffer();
-        buf
-          ..writeln('Flutter + Skia Gold imgtest init failed.')
-          ..writeln('stdout: ${imgtestInitResult.stdout}')
-          ..writeln('stderr: ${imgtestInitResult.stderr}');
-        throw NonZeroExitCode(imgtestInitResult.exitCode, buf.toString());
-      }
-    }
   }
 
-  Future<bool> imgtestAdd(String testName, File goldenFile) async {
+  Future<void> _runCommands(
-    final List<String> imgtestArguments = <String>[
+    List<String> commands, {
-      'imgtest', 'add',
+    Directory workingDirectory,
-      '--work-dir', _workDirectory.childDirectory('temp').path,
+  }) async {
-      '--test-name', testName,
+    for (String command in commands) {
-      '--png-file', goldenFile.path,
+      final List<String> parts = command.split(' ');
-    ];
+      final io.ProcessResult result = await process.run(
-
+        parts,
-    if(imgtestArguments.contains(null)) {
+        workingDirectory: workingDirectory?.path,
-      final StringBuffer buf = StringBuffer();
-      buf.writeln('Null argument for Skia Gold imgtest add:');
-      imgtestArguments.forEach(buf.writeln);
-      throw NonZeroExitCode(1, buf.toString());
-    }
-
-    final io.ProcessResult imgtestResult = io.Process.runSync(
-      _goldctl,
-      imgtestArguments,
       );
-    if (imgtestResult.exitCode != 0) {
+      if (result.exitCode != 0) {
-      final StringBuffer buf = StringBuffer();
+        throw NonZeroExitCode(result.exitCode, result.stderr);
-      buf
+      }
-        ..writeln('Flutter + Skia Gold imgtest add failed.')
-        ..writeln('If this is the first execution of this test, it may need to be triaged.')
-        ..writeln('In this case, re-run the test after triage is completed.\n')
-        ..writeln('stdout: ${imgtestResult.stdout}')
-        ..writeln('stderr: ${imgtestResult.stderr}');
-      throw NonZeroExitCode(imgtestResult.exitCode, buf.toString());
     }
-    return true;
   }
 
-  Future<String> _getCommitHash() async {
+  Future<void> _obtainLock() async {
-    // TODO(Piinks): Remove after pre-commit tests can be ingested by Skia Gold, https://github.com/flutter/flutter/pull/31630
+    final File lockFile = flutterRoot.childFile(fs.path.join('bin', 'cache', 'goldens.lockfile'));
-    return 'e51947241b37790a9e4e33bfdef59aaa9b930851';
+    await lockFile.create(recursive: true);
-//    if (!flutterRoot.existsSync()) {
+    _lock = await lockFile.open(mode: io.FileMode.write);
-//      return null;
+    await _lock.lock(io.FileLock.blockingExclusive);
-//    } else {
-//      final io.ProcessResult revParse = await process.run(
-//        <String>['git', 'rev-parse', 'HEAD'],
-//        workingDirectory: flutterRoot.path,
-//      );
-//      return revParse.exitCode == 0 ? revParse.stdout.trim() : null;
   }
 
-  Future<bool> _isNewCommit() async {
+  Future<void> _releaseLock() async {
-    // auth file is there, need to check if we are on a new commit
+    await _lock.close();
-    final File resultFile = _workDirectory.childFile(fs.path.join(
+    _lock = null;
-      'temp',
-      'result-state.json'
-    ));
-    final String contents = await resultFile.readAsString();
-    final Map<String, dynamic> resultJSON = convert.json.decode(contents);
-    final String lastTestedCommit = resultJSON['SharedConfig']['gitHash'];
-    final String currentCommit = await _getCommitHash();
-    return lastTestedCommit == currentCommit ? false : true;
-  }
-
-  String _getKeysJSON() {
-    // TODO(Piinks): Parse out cleaner key information, https://github.com/flutter/flutter/pull/31630
-    return convert.json.encode(
-      <String, dynamic>{
-        'Operating System' : io.Platform.operatingSystem,
-        'Operating System Version' : io.Platform.operatingSystemVersion,
-        'Dart Version' : io.Platform.version,
-      });
   }
 }
 /// Exception that signals a process' exit with a non-zero exit code.

packages/flutter_test/lib/src/matchers.dart

@@ -332,43 +332,6 @@ AsyncMatcher matchesGoldenFile(dynamic key) {
   throw ArgumentError('Unexpected type for golden file: ${key.runtimeType}');
 }
 
-/// Asserts that a [Finder], [Future<ui.Image>], or [ui.Image] matches the
-/// golden image file identified by [key] through Skia Gold.
-///
-/// For the case of a [Finder], the [Finder] must match exactly one widget and
-/// the rendered image of the first [RepaintBoundary] ancestor of the widget is
-/// treated as the image for the widget.
-///
-/// [key] may be either a [Uri] or a [String] representation of a URI.
-///
-/// This is an asynchronous matcher, meaning that callers should use
-/// [expectLater] when using this matcher and await the future returned by
-/// [expectLater].
-///
-/// ## Sample code
-///
-/// ```dart
-/// await expectLater(find.text('Save'), matchesSkiaGoldFile('save.png'));
-/// await expectLater(image, matchesSkiaGoldFile('save.png'));
-/// await expectLater(imageFuture, matchesSkiaGoldFile('save.png'));
-/// ```
-///
-/// See also:
-///
-///  * [FlutterGoldenFileComparator], which acts as the backend for this matcher.
-///  * [SkiaGoldClient], which the [FlutterGoldenFileComparator] uses to execute
-///    and process results of testing with Skia Gold.
-///  * [flutter_test] for a discussion of test configurations, whereby callers
-///    may swap out the backend for this matcher.
-AsyncMatcher matchesSkiaGoldFile(dynamic key) {
-  if (key is Uri) {
-    return _MatchesSkiaGoldFile(key);
-  } else if (key is String) {
-    return _MatchesSkiaGoldFile.forStringPath(key);
-  }
-  throw ArgumentError('Unexpected type for Skia Gold file: ${key.runtimeType}');
-}
-
 /// Asserts that a [Finder], [Future<ui.Image>], or [ui.Image] matches a
 /// reference image identified by [image].
 ///
@@ -1763,53 +1726,6 @@ class _MatchesGoldenFile extends AsyncMatcher {
       description.add('one widget whose rasterized image matches golden image "$key"');
 }
 
-class _MatchesSkiaGoldFile extends AsyncMatcher {
-  const _MatchesSkiaGoldFile(this.key);
-
-  _MatchesSkiaGoldFile.forStringPath(String path) : key = Uri.parse(path);
-
-  final Uri key;
-
-  @override
-  Future<String> matchAsync(dynamic item) async {
-    Future<ui.Image> imageFuture;
-    if (item is Future<ui.Image>) {
-      imageFuture = item;
-    }else if (item is ui.Image) {
-      imageFuture = Future<ui.Image>.value(item);
-    } else {
-      final Finder finder = item;
-      final Iterable<Element> elements = finder.evaluate();
-      if (elements.isEmpty) {
-        return 'could not be rendered because no widget was found.';
-      } else if (elements.length > 1) {
-        return 'matched too many widgets.';
-      }
-      imageFuture = _captureImage(elements.single);
-    }
-
-    final TestWidgetsFlutterBinding binding = TestWidgetsFlutterBinding.ensureInitialized();
-    return binding.runAsync<String>(() async {
-      final ui.Image image = await imageFuture;
-      final ByteData bytes = await image.toByteData(format: ui.ImageByteFormat.png)
-        .timeout(const Duration(seconds: 10), onTimeout: () => null);
-      if (bytes == null)
-        return 'Failed to generate screenshot from engine within the 10,000ms timeout';
-      await goldenFileComparator.update(key, bytes.buffer.asUint8List());
-      try {
-        final bool success = await goldenFileComparator.compare(null, key);
-        return success ? null : 'Skia Gold test fail.';
-      } on TestFailure catch (ex) {
-        return ex.message;
-      }
-    }, additionalTime: const Duration(seconds: 11));
-  }
-
-  @override
-  Description describe(Description description) =>
-    description.add('one widget whose rasterized images matches Skia Gold image $key');
-}
-
 class _MatchesSemanticsData extends Matcher {
   _MatchesSemanticsData({
     this.label,

packages/flutter_test/test/matchers_test.dart

@@ -402,88 +402,6 @@ void main() {
     });
   });
 
-  group('matchesSkiaGoldFile', () {
-    _FakeComparator comparator;
-
-    Widget boilerplate(Widget child) {
-      return Directionality(
-        textDirection: TextDirection.ltr,
-        child: child,
-      );
-    }
-
-    setUp(() {
-      comparator = _FakeComparator();
-      goldenFileComparator = comparator;
-    });
-
-    group('matches', () {
-      testWidgets('if comparator succeeds', (WidgetTester tester) async {
-        await tester.pumpWidget(boilerplate(const Text('hello')));
-        final Finder finder = find.byType(Text);
-        await expectLater(finder, matchesSkiaGoldFile('foo.png'));
-        expect(comparator.invocation, _ComparatorInvocation.compare);
-        expect(comparator.imageBytes, null);
-        expect(comparator.golden, Uri.parse('foo.png'));
-      });
-    });
-
-    group('does not match', () {
-      testWidgets('if comparator returns false', (WidgetTester tester) async {
-        comparator.behavior = _ComparatorBehavior.returnFalse;
-        await tester.pumpWidget(boilerplate(const Text('hello')));
-        final Finder finder = find.byType(Text);
-        try {
-          await expectLater(finder, matchesSkiaGoldFile('foo.png'));
-          fail('TestFailure expected but not thrown');
-        } on TestFailure catch (error) {
-          expect(comparator.invocation, _ComparatorInvocation.compare);
-          expect(error.message, contains('does not match'));
-        }
-      });
-
-      testWidgets('if comparator throws', (WidgetTester tester) async {
-        comparator.behavior = _ComparatorBehavior.throwTestFailure;
-        await tester.pumpWidget(boilerplate(const Text('hello')));
-        final Finder finder = find.byType(Text);
-        try {
-          await expectLater(finder, matchesSkiaGoldFile('foo.png'));
-          fail('TestFailure expected but not thrown');
-        } on TestFailure catch (error) {
-          expect(comparator.invocation, _ComparatorInvocation.compare);
-          expect(error.message, contains('fake message'));
-        }
-      });
-
-      testWidgets('if finder finds no widgets', (WidgetTester tester) async {
-        await tester.pumpWidget(boilerplate(Container()));
-        final Finder finder = find.byType(Text);
-        try {
-          await expectLater(finder, matchesSkiaGoldFile('foo.png'));
-          fail('TestFailure expected but not thrown');
-        } on TestFailure catch (error) {
-          expect(comparator.invocation, isNull);
-          expect(error.message, contains('no widget was found'));
-        }
-      });
-
-      testWidgets(
-        'if finder finds multiple widgets', (WidgetTester tester) async {
-        await tester.pumpWidget(boilerplate(Column(
-          children: const <Widget>[Text('hello'), Text('world')],
-        )));
-        final Finder finder = find.byType(Text);
-        try {
-          await expectLater(finder, matchesSkiaGoldFile('foo.png'));
-          fail('TestFailure expected but not thrown');
-        } on TestFailure catch (error) {
-          expect(comparator.invocation, isNull);
-          expect(error.message, contains('too many widgets'));
-        }
-      });
-    });
-  });
-
   group('matchesSemanticsData', () {
     testWidgets('matches SemanticsData', (WidgetTester tester) async {
       final SemanticsHandle handle = tester.ensureSemantics();

packages/flutter_tools/lib/src/commands/update_packages.dart

@@ -6,6 +6,7 @@ import 'dart:async';
 import 'dart:collection';
 
 import 'package:meta/meta.dart';
+import 'package:flutter_goldens_client/client.dart';
 
 import '../base/common.dart';
 import '../base/file_system.dart';
@@ -138,14 +139,13 @@ class UpdatePackagesCommand extends FlutterCommand {
     // The dev/integration_tests/android_views integration test depends on an assets
     // package that is in the goldens repository. We need to make sure that the goldens
     // repository is cloned locally before we verify or update pubspecs.
-    // TODO(katelovett): Resolve dependency for android_views living in goldens repository
+    printStatus('Cloning goldens repository...');
-//    printStatus('Cloning goldens repository...');
+    try {
-//    try {
+      final GoldensClient goldensClient = GoldensClient();
-//      final GoldensClient goldensClient = GoldensClient();
+      await goldensClient.prepare();
-//      await goldensClient.prepare();
+    } on NonZeroExitCode catch (e) {
-//    } on NonZeroExitCode catch (e) {
+      throwToolExit(e.stderr, exitCode: e.exitCode);
-//      throwToolExit(e.stderr, exitCode: e.exitCode);
+    }
-//    }
 
     if (isVerifyOnly) {
       bool needsUpdate = false;