backstage/.changeset/api-override-test-utils.md

@backstage/frontend-test-utils

@backstage/frontend-test-utils
patch

Added an apis option to createExtensionTester, renderInTestApp, and renderTestApp to override APIs when testing extensions. Use the mockApis helpers to create mock implementations:

import { identityApiRef } from '@backstage/frontend-plugin-api';
import { mockApis } from '@backstage/frontend-test-utils';

// Override APIs in createExtensionTester
const tester = createExtensionTester(myExtension, {
  apis: [
    [
      identityApiRef,
      mockApis.identity({ userEntityRef: 'user:default/guest' }),
    ],
  ],
});

// Override APIs in renderInTestApp
renderInTestApp(<MyComponent />, {
  apis: [
    [
      identityApiRef,
      mockApis.identity({ userEntityRef: 'user:default/guest' }),
    ],
  ],
});

// Override APIs in renderTestApp
renderTestApp({
  extensions: [myExtension],
  apis: [
    [
      identityApiRef,
      mockApis.identity({ userEntityRef: 'user:default/guest' }),
    ],
  ],
});