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When running component tests in TestBed, an application may include provideClientHydration() (e.g. from appConfig.providers) or use defer blocks with hydrate triggers without hydration providers configured. In these testing scenarios, there is no serialized server state in TransferState. As a result, Angular emitted spurious warnings: - NG0505: warning that client hydration was requested but no serialized info was found. - NG0508: warning that incremental hydration is not enabled for @defer hydrate triggers. This commit introduces an internal IS_TESTING token, provided by TestBedCompiler and BrowserTestingModule, which suppresses these warnings in test environments. Fixes angular#62053
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When running component tests in TestBed, an application configuration may include
provideClientHydration()(e.g. fromappConfig.providers) or use@deferblocks withhydratetriggers without hydration providers configured.In these testing scenarios, there is no serialized server state in
TransferStatebecause the tests run purely in the test runner. As a result, Angular emitted spurious warnings:NG0505: warning that client hydration was requested on the client, but no serialized information was present in the server response.NG0508: warning that incremental hydration is not enabled when@defer (hydrate ...)triggers are used.This commit introduces an internal
IS_TESTINGtoken (defaulting tofalse), which is provided astruebyTestBedCompilerandBrowserTestingModule. It suppresses both warnings when running inside a testing environment.Fixes #62053