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Part of work on [#101077](https://github.com/flutter/flutter/pull/141194). This is done as a separate PR to avoid a massive diff. ## Context 1. The `FakeCommand` class accepts a list of patterns that's used to match a command given to its `FakeProcessManager`. Since `FakeCommand` can match a list of patterns, not just specifically strings, it can be used to match commands where the exact value of some arguments can't (easily) known ahead of time. For example, a part of the tool may invoke a command with an argument that is the path of a temporarily file that has a randomly-generated basename. 2. The `FakeCommand` class provides on `onRun` parameter, which is a callback that is run when the `FakeProcessManager` runs a command that matches the `FakeCommand` in question. ## Issue In the event that a `FakeCommand` is constructed using patterns, the test code can't know the exact values used for arguments in the command. This PR proposes changing the type of `onRun` from `VoidCallback?` to `void Function(List<String>)?`. When run, the value `List<String>` parameter will be the full command that the `FakeCommand` matched. Example: ```dart FakeCommand( command: <Pattern>[ artifacts.getArtifactPath(Artifact.engineDartBinary), 'run', 'vector_graphics_compiler', RegExp(r'--input=/.*\.temp'), RegExp(r'--output=/.*\.temp'), ], onRun: (List<String> command) { final outputPath = (() { // code to parse `--output` from `command` })(); testFileSystem.file(outputPath).createSync(recursive: true); }, ) ``` |
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| examples_smoke_test.dart | ||
| find_engine_commit.dart | ||
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