[flutter_tools] add shuffle to hermetic run_tests#105462
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fluttergithubbot merged 5 commits intoflutter:masterfrom Jun 9, 2022
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| TestUsageCommand('run', parameters: CustomDimensions.fromMap(<String, String>{ | ||
| 'cd3': 'false', 'cd4': 'ios', 'cd22': 'iOS 13', | ||
| 'cd23': 'debug', 'cd18': 'false', 'cd15': 'swift', 'cd31': 'false', | ||
| 'cd23': 'debug', 'cd18': 'false', 'cd15': 'swift', 'cd31': 'true', |
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cd31 is commandHasTerminal (https://github.com/christopherfujino/flutter/blob/improve-run-test/packages/flutter_tools/lib/src/reporting/custom_dimensions.dart#L102). The global environment was leaking into this test previously; thus, this test was passing on CI, since the Dart VM did not have a terminal attached, yet failing locally since it did. By overriding the context with a FakeStdio that defaults to hasTerminal = true, this dimension should be true both locally and on CI.
| final MemoryStdout _stdout = MemoryStdout()..terminalColumns = 80; | ||
| final MemoryIOSink _stderr = MemoryIOSink(); | ||
| final StreamController<List<int>> _stdin = StreamController<List<int>>(); | ||
| final FakeStdin _stdin = FakeStdin(); |
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Previously this was failing the cast in https://github.com/christopherfujino/flutter/blob/improve-run-test/packages/flutter_tools/lib/src/base/terminal.dart#L286.
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Part of #85160
Note, the fix to allowing shuffle was actually lifting Cache.disableLocking() to the top level scope in https://github.com/flutter/flutter/pull/105283/files#diff-38f3e3415d9806f22a78060fafb3206d1a006f74631fac04e7a680a64e06ccf0R52, however, I didn't actually disable shuffle in that PR because many other tests in that file were failing locally. The code changes in this PR are just to remove the local terminal from the test code, so that the tests are more hermetic (and all pass for me locally now).