test(@angular-devkit/build-angular): disable Webpack caching during harness-based unit tests #21897
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The default set of metadata fields provided to all builders executed via the BuilderHarness is controlled programmatically. The BuilderHarness is eventually intended to operate in-memory and without file system access unlike the legacy unit tests. The
cli.cache.enabled
option must therefore be set within the BuilderHarness initialization code.cli.cache.enabled
set to false provides improved test isolation guarantees by disabling Webpack’s caching.