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`tView` that is stored on a component def contains information about directives and pipes that are available in the scope of this component. Patching component scope causes `tView` to be updated. Prior to this commit, the `tView` information was not restored/reset in case component class is not declared in the `declarations` field while calling `TestBed.configureTestingModule`, thus causing `tView` to be reused between tests (thus preserving scopes information between tests). This commit updates TestBed logic to preserve `tView` value before applying scope changes and reset it back to the previous state between tests. Closes #38600. PR Close #38659