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fix(core): preserve change detection strategy when overriding component #69731

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fix(core): preserve change detection strategy when overriding component #69731

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2 changes: 1 addition & 1 deletion packages/core/src/metadata/directives.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -679,7 +679,7 @@ export interface Component extends Directive {
*/
export const Component: ComponentDecorator = makeDecorator(
'Component',
(c: Component = {}) => ({changeDetection: ChangeDetectionStrategy.Eager, ...c}),
(c: Component = {}) => ({...c}),
Directive,
undefined,
(type: Type<any>, meta: Component) => compileComponent(type, meta),
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14 changes: 14 additions & 0 deletions packages/core/test/test_bed_spec.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -428,6 +428,20 @@ describe('TestBed with Standalone types', () => {
expect(fixture.nativeElement.innerHTML).toBe('Overridden');
});

it('should preserve default change detection when overriding components', () => {
@Component({
template: 'Original',
})
class DefaultCmp {}

const onPushBefore = (DefaultCmp as any).ɵcmp.onPush;
TestBed.overrideComponent(DefaultCmp, {set: {template: 'Overridden'}});
TestBed.createComponent(DefaultCmp);
const onPushAfter = (DefaultCmp as any).ɵcmp.onPush;

expect(onPushAfter).withContext('ɵcmp.OnPush after override').toBe(onPushBefore);
});

it('should allow overriding the set of directives and pipes used in a standalone component', () => {
@Directive({
selector: '[dir]',
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