[macOS] Battery check in platform_channel sample (#123354)

Adds a check for the case where a device has no battery present. The
devicelab test expects the text "No battery." in the case where a device
has no battery. This is triggered by returning an error with a
NO_BATTERY error code.

Also applies some cosmetic fixes:
* Amends a copyright notice to Flutter instead of com.example
* Deletes an unused test.

Issue: https://github.com/flutter/flutter/issues/79204

examples/platform_channel/macos/Runner.xcodeproj/project.pbxproj

@@ -21,7 +21,6 @@
 /* End PBXAggregateTarget section */
 
 /* Begin PBXBuildFile section */
-		331C80D8294CF71000263BE5 /* RunnerTests.swift in Sources */ = {isa = PBXBuildFile; fileRef = 331C80D7294CF71000263BE5 /* RunnerTests.swift */; };
 		335BBD1B22A9A15E00E9071D /* GeneratedPluginRegistrant.swift in Sources */ = {isa = PBXBuildFile; fileRef = 335BBD1A22A9A15E00E9071D /* GeneratedPluginRegistrant.swift */; };
 		33CC10F12044A3C60003C045 /* AppDelegate.swift in Sources */ = {isa = PBXBuildFile; fileRef = 33CC10F02044A3C60003C045 /* AppDelegate.swift */; };
 		33CC10F32044A3C60003C045 /* Assets.xcassets in Resources */ = {isa = PBXBuildFile; fileRef = 33CC10F22044A3C60003C045 /* Assets.xcassets */; };
@@ -31,13 +30,6 @@
 /* End PBXBuildFile section */
 
 /* Begin PBXContainerItemProxy section */
-		331C80D9294CF71000263BE5 /* PBXContainerItemProxy */ = {
-			isa = PBXContainerItemProxy;
-			containerPortal = 33CC10E52044A3C60003C045 /* Project object */;
-			proxyType = 1;
-			remoteGlobalIDString = 33CC10EC2044A3C60003C045;
-			remoteInfo = Runner;
-		};
 		33CC111F2044C79F0003C045 /* PBXContainerItemProxy */ = {
 			isa = PBXContainerItemProxy;
 			containerPortal = 33CC10E52044A3C60003C045 /* Project object */;
@@ -61,8 +53,6 @@
 /* End PBXCopyFilesBuildPhase section */
 
 /* Begin PBXFileReference section */
-		331C80D5294CF71000263BE5 /* RunnerTests.xctest */ = {isa = PBXFileReference; explicitFileType = wrapper.cfbundle; includeInIndex = 0; path = RunnerTests.xctest; sourceTree = BUILT_PRODUCTS_DIR; };
-		331C80D7294CF71000263BE5 /* RunnerTests.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = RunnerTests.swift; sourceTree = "<group>"; };
 		333000ED22D3DE5D00554162 /* Warnings.xcconfig */ = {isa = PBXFileReference; lastKnownFileType = text.xcconfig; path = Warnings.xcconfig; sourceTree = "<group>"; };
 		335BBD1A22A9A15E00E9071D /* GeneratedPluginRegistrant.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = GeneratedPluginRegistrant.swift; sourceTree = "<group>"; };
 		33CC10ED2044A3C60003C045 /* platform_channel.app */ = {isa = PBXFileReference; explicitFileType = wrapper.application; includeInIndex = 0; path = platform_channel.app; sourceTree = BUILT_PRODUCTS_DIR; };
@@ -83,13 +73,6 @@
 /* End PBXFileReference section */
 
 /* Begin PBXFrameworksBuildPhase section */
-		331C80D2294CF70F00263BE5 /* Frameworks */ = {
-			isa = PBXFrameworksBuildPhase;
-			buildActionMask = 2147483647;
-			files = (
-			);
-			runOnlyForDeploymentPostprocessing = 0;
-		};
 		33CC10EA2044A3C60003C045 /* Frameworks */ = {
 			isa = PBXFrameworksBuildPhase;
 			buildActionMask = 2147483647;
@@ -100,14 +83,6 @@
 /* End PBXFrameworksBuildPhase section */
 
 /* Begin PBXGroup section */
-		331C80D6294CF71000263BE5 /* RunnerTests */ = {
-			isa = PBXGroup;
-			children = (
-				331C80D7294CF71000263BE5 /* RunnerTests.swift */,
-			);
-			path = RunnerTests;
-			sourceTree = "<group>";
-		};
 		33BA886A226E78AF003329D5 /* Configs */ = {
 			isa = PBXGroup;
 			children = (
@@ -124,7 +99,6 @@
 			children = (
 				33FAB671232836740065AC1E /* Runner */,
 				33CEB47122A05771004F2AC0 /* Flutter */,
-				331C80D6294CF71000263BE5 /* RunnerTests */,
 				33CC10EE2044A3C60003C045 /* Products */,
 				D73912EC22F37F3D000D13A0 /* Frameworks */,
 			);
@@ -134,7 +108,6 @@
 			isa = PBXGroup;
 			children = (
 				33CC10ED2044A3C60003C045 /* platform_channel.app */,
-				331C80D5294CF71000263BE5 /* RunnerTests.xctest */,
 			);
 			name = Products;
 			sourceTree = "<group>";
@@ -185,24 +158,6 @@
 /* End PBXGroup section */
 
 /* Begin PBXNativeTarget section */
-		331C80D4294CF70F00263BE5 /* RunnerTests */ = {
-			isa = PBXNativeTarget;
-			buildConfigurationList = 331C80DE294CF71000263BE5 /* Build configuration list for PBXNativeTarget "RunnerTests" */;
-			buildPhases = (
-				331C80D1294CF70F00263BE5 /* Sources */,
-				331C80D2294CF70F00263BE5 /* Frameworks */,
-				331C80D3294CF70F00263BE5 /* Resources */,
-			);
-			buildRules = (
-			);
-			dependencies = (
-				331C80DA294CF71000263BE5 /* PBXTargetDependency */,
-			);
-			name = RunnerTests;
-			productName = RunnerTests;
-			productReference = 331C80D5294CF71000263BE5 /* RunnerTests.xctest */;
-			productType = "com.apple.product-type.bundle.unit-test";
-		};
 		33CC10EC2044A3C60003C045 /* Runner */ = {
 			isa = PBXNativeTarget;
 			buildConfigurationList = 33CC10FB2044A3C60003C045 /* Build configuration list for PBXNativeTarget "Runner" */;
@@ -233,10 +188,6 @@
 				LastUpgradeCheck = 1300;
 				ORGANIZATIONNAME = "";
 				TargetAttributes = {
-					331C80D4294CF70F00263BE5 = {
-						CreatedOnToolsVersion = 14.0;
-						TestTargetID = 33CC10EC2044A3C60003C045;
-					};
 					33CC10EC2044A3C60003C045 = {
 						CreatedOnToolsVersion = 9.2;
 						LastSwiftMigration = 1420;
@@ -267,20 +218,12 @@
 			projectRoot = "";
 			targets = (
 				33CC10EC2044A3C60003C045 /* Runner */,
-				331C80D4294CF70F00263BE5 /* RunnerTests */,
 				33CC111A2044C6BA0003C045 /* Flutter Assemble */,
 			);
 		};
 /* End PBXProject section */
 
 /* Begin PBXResourcesBuildPhase section */
-		331C80D3294CF70F00263BE5 /* Resources */ = {
-			isa = PBXResourcesBuildPhase;
-			buildActionMask = 2147483647;
-			files = (
-			);
-			runOnlyForDeploymentPostprocessing = 0;
-		};
 		33CC10EB2044A3C60003C045 /* Resources */ = {
 			isa = PBXResourcesBuildPhase;
 			buildActionMask = 2147483647;
@@ -334,14 +277,6 @@
 /* End PBXShellScriptBuildPhase section */
 
 /* Begin PBXSourcesBuildPhase section */
-		331C80D1294CF70F00263BE5 /* Sources */ = {
-			isa = PBXSourcesBuildPhase;
-			buildActionMask = 2147483647;
-			files = (
-				331C80D8294CF71000263BE5 /* RunnerTests.swift in Sources */,
-			);
-			runOnlyForDeploymentPostprocessing = 0;
-		};
 		33CC10E92044A3C60003C045 /* Sources */ = {
 			isa = PBXSourcesBuildPhase;
 			buildActionMask = 2147483647;
@@ -356,11 +291,6 @@
 /* End PBXSourcesBuildPhase section */
 
 /* Begin PBXTargetDependency section */
-		331C80DA294CF71000263BE5 /* PBXTargetDependency */ = {
-			isa = PBXTargetDependency;
-			target = 33CC10EC2044A3C60003C045 /* Runner */;
-			targetProxy = 331C80D9294CF71000263BE5 /* PBXContainerItemProxy */;
-		};
 		33CC11202044C79F0003C045 /* PBXTargetDependency */ = {
 			isa = PBXTargetDependency;
 			target = 33CC111A2044C6BA0003C045 /* Flutter Assemble */;
@@ -381,48 +311,6 @@
 /* End PBXVariantGroup section */
 
 /* Begin XCBuildConfiguration section */
-		331C80DB294CF71000263BE5 /* Debug */ = {
-			isa = XCBuildConfiguration;
-			buildSettings = {
-				BUNDLE_LOADER = "$(TEST_HOST)";
-				CURRENT_PROJECT_VERSION = 1;
-				GENERATE_INFOPLIST_FILE = YES;
-				MARKETING_VERSION = 1.0;
-				PRODUCT_BUNDLE_IDENTIFIER = com.example.platformChannel.RunnerTests;
-				PRODUCT_NAME = "$(TARGET_NAME)";
-				SWIFT_VERSION = 5.0;
-				TEST_HOST = "$(BUILT_PRODUCTS_DIR)/platform_channel.app/$(BUNDLE_EXECUTABLE_FOLDER_PATH)/platform_channel";
-			};
-			name = Debug;
-		};
-		331C80DC294CF71000263BE5 /* Release */ = {
-			isa = XCBuildConfiguration;
-			buildSettings = {
-				BUNDLE_LOADER = "$(TEST_HOST)";
-				CURRENT_PROJECT_VERSION = 1;
-				GENERATE_INFOPLIST_FILE = YES;
-				MARKETING_VERSION = 1.0;
-				PRODUCT_BUNDLE_IDENTIFIER = com.example.platformChannel.RunnerTests;
-				PRODUCT_NAME = "$(TARGET_NAME)";
-				SWIFT_VERSION = 5.0;
-				TEST_HOST = "$(BUILT_PRODUCTS_DIR)/platform_channel.app/$(BUNDLE_EXECUTABLE_FOLDER_PATH)/platform_channel";
-			};
-			name = Release;
-		};
-		331C80DD294CF71000263BE5 /* Profile */ = {
-			isa = XCBuildConfiguration;
-			buildSettings = {
-				BUNDLE_LOADER = "$(TEST_HOST)";
-				CURRENT_PROJECT_VERSION = 1;
-				GENERATE_INFOPLIST_FILE = YES;
-				MARKETING_VERSION = 1.0;
-				PRODUCT_BUNDLE_IDENTIFIER = com.example.platformChannel.RunnerTests;
-				PRODUCT_NAME = "$(TARGET_NAME)";
-				SWIFT_VERSION = 5.0;
-				TEST_HOST = "$(BUILT_PRODUCTS_DIR)/platform_channel.app/$(BUNDLE_EXECUTABLE_FOLDER_PATH)/platform_channel";
-			};
-			name = Profile;
-		};
 		338D0CE9231458BD00FA5F75 /* Profile */ = {
 			isa = XCBuildConfiguration;
 			baseConfigurationReference = 7AFA3C8E1D35360C0083082E /* Release.xcconfig */;
@@ -653,16 +541,6 @@
 /* End XCBuildConfiguration section */
 
 /* Begin XCConfigurationList section */
-		331C80DE294CF71000263BE5 /* Build configuration list for PBXNativeTarget "RunnerTests" */ = {
-			isa = XCConfigurationList;
-			buildConfigurations = (
-				331C80DB294CF71000263BE5 /* Debug */,
-				331C80DC294CF71000263BE5 /* Release */,
-				331C80DD294CF71000263BE5 /* Profile */,
-			);
-			defaultConfigurationIsVisible = 0;
-			defaultConfigurationName = Release;
-		};
 		33CC10E82044A3C60003C045 /* Build configuration list for PBXProject "Runner" */ = {
 			isa = XCConfigurationList;
 			buildConfigurations = (

examples/platform_channel/macos/Runner.xcodeproj/xcshareddata/xcschemes/Runner.xcscheme

@@ -37,17 +37,6 @@
          </BuildableReference>
       </MacroExpansion>
       <Testables>
-         <TestableReference
-            skipped = "NO"
-            parallelizable = "YES">
-            <BuildableReference
-               BuildableIdentifier = "primary"
-               BlueprintIdentifier = "331C80D4294CF70F00263BE5"
-               BuildableName = "RunnerTests.xctest"
-               BlueprintName = "RunnerTests"
-               ReferencedContainer = "container:Runner.xcodeproj">
-            </BuildableReference>
-         </TestableReference>
       </Testables>
    </TestAction>
    <LaunchAction

examples/platform_channel/macos/Runner/Configs/AppInfo.xcconfig

@@ -11,4 +11,4 @@ PRODUCT_NAME = platform_channel
 PRODUCT_BUNDLE_IDENTIFIER = com.example.platformChannel
 
 // The copyright displayed in application information
-PRODUCT_COPYRIGHT = Copyright © 2023 com.example. All rights reserved.
+PRODUCT_COPYRIGHT = Copyright © 2014 The Flutter Authors. All rights reserved.

examples/platform_channel/macos/Runner/MainFlutterWindow.swift

@@ -24,6 +24,13 @@ class MainFlutterWindow: NSWindow, FlutterStreamHandler, PowerSourceStateChangeD
     batteryChannel.setMethodCallHandler({ [weak self] (call, result) in
       switch call.method {
       case "getBatteryLevel":
+        if self?.powerSource.hasBattery() == false {
+          result(FlutterError(
+            code: "NO_BATTERY",
+            message: "Device does not have a battery",
+            details: nil))
+          return
+        }
         let level = self?.powerSource.getCurrentCapacity()
         if level == -1 {
           result(
@@ -31,6 +38,7 @@ class MainFlutterWindow: NSWindow, FlutterStreamHandler, PowerSourceStateChangeD
               code: "UNAVAILABLE",
               message: "Battery info unavailable",
               details: nil))
+          return
         }
         result(level)
       default:

examples/platform_channel/macos/Runner/PowerSource.swift

@@ -16,6 +16,10 @@ class PowerSource {
   let info = IOPSCopyPowerSourcesInfo().takeRetainedValue()
   lazy var sources = IOPSCopyPowerSourcesList(info).takeRetainedValue() as Array
 
+  func hasBattery() -> Bool {
+    return !sources.isEmpty
+  }
+
   /// Returns the current power source capacity. Apple-defined power sources will return this value
   /// as a percentage.
   func getCurrentCapacity() -> Int {
@@ -31,8 +35,7 @@ class PowerSource {
 
   /// Returns whether the device is drawing battery power or connected to an external power source.
   func getPowerState() -> PowerState {
-    if !sources.isEmpty {
+    if let source = sources.first {
-      let source = sources[0]
       let description =
         IOPSGetPowerSourceDescription(info, source).takeUnretainedValue() as! [String: AnyObject]
       if let state = description[kIOPSPowerSourceStateKey] as? String {

examples/platform_channel/macos/RunnerTests/RunnerTests.swift

@@ -1,16 +0,0 @@
-// Copyright 2014 The Flutter Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-import FlutterMacOS
-import Cocoa
-import XCTest
-
-class RunnerTests: XCTestCase {
-
-  func testExample() {
-    // If you add code to the Runner application, consider adding tests here.
-    // See https://developer.apple.com/documentation/xctest for more information about using XCTest.
-  }
-
-}