Merge "Prevent mock filesystem files being overridden by accident" am: 412a209d87 (a517bddd) · Commits · e / os / android_build_soong

android/fixture.go

+29 −0

Original line number	Diff line number	Diff line
		@@ -237,8 +237,14 @@ func NewFixtureFactory(buildDirSupplier *string, preparers ...FixturePreparer) F
		// A set of mock files to add to the mock file system.
		type MockFS map[string][]byte

		// Merge adds the extra entries from the supplied map to this one.
		//
		// Fails if the supplied map files with the same paths are present in both of them.
		func (fs MockFS) Merge(extra map[string][]byte) {
		for p, c := range extra {
		if _, ok := fs[p]; ok {
		panic(fmt.Errorf("attempted to add file %s to the mock filesystem but it already exists", p))
		}
		fs[p] = c
		}
		}
		@@ -289,17 +295,40 @@ func FixtureMergeMockFs(mockFS MockFS) FixturePreparer {
		}

		// Add a file to the mock filesystem
		//
		// Fail if the filesystem already contains a file with that path, use FixtureOverrideFile instead.
		func FixtureAddFile(path string, contents []byte) FixturePreparer {
		return FixtureModifyMockFS(func(fs MockFS) {
		if _, ok := fs[path]; ok {
		panic(fmt.Errorf("attempted to add file %s to the mock filesystem but it already exists, use FixtureOverride*File instead", path))
		}
		fs[path] = contents
		})
		}

		// Add a text file to the mock filesystem
		//
		// Fail if the filesystem already contains a file with that path.
		func FixtureAddTextFile(path string, contents string) FixturePreparer {
		return FixtureAddFile(path, []byte(contents))
		}

		// Override a file in the mock filesystem
		//
		// If the file does not exist this behaves as FixtureAddFile.
		func FixtureOverrideFile(path string, contents []byte) FixturePreparer {
		return FixtureModifyMockFS(func(fs MockFS) {
		fs[path] = contents
		})
		}

		// Override a text file in the mock filesystem
		//
		// If the file does not exist this behaves as FixtureAddTextFile.
		func FixtureOverrideTextFile(path string, contents string) FixturePreparer {
		return FixtureOverrideFile(path, []byte(contents))
		}

		// Add the root Android.bp file with the supplied contents.
		func FixtureWithRootAndroidBp(contents string) FixturePreparer {
		return FixtureAddTextFile("Android.bp", contents)

cc/testing.go

+5 −2

Original line number	Diff line number	Diff line
		@@ -649,8 +649,11 @@ var PrepareForTestOnWindows = android.GroupFixturePreparers(

		// The preparer to include if running a cc related test for linux bionic.
		var PrepareForTestOnLinuxBionic = android.GroupFixturePreparers(
		// Enable linux bionic.
		android.FixtureAddTextFile(linuxBionicDefaultsPath, withLinuxBionic()),
		// Enable linux bionic
		//
		// Can be used after PrepareForTestWithCcDefaultModules to override its default behavior of
		// disabling linux bionic, hence why this uses FixtureOverrideTextFile.
		android.FixtureOverrideTextFile(linuxBionicDefaultsPath, withLinuxBionic()),
		)

		// The preparer to include if running a cc related test for fuchsia.