Function getHarnessOrNull

src/cdk/testing/component-harness.ts:518–520

* Gets the first matching harness for the given query within the current harness's content. * @param query The harness query to search for. * @returns The first harness matching the given query, or null if none is found.

(query: HarnessQuery<T>)

   * @returns The first harness matching the given query, or null if none is found.
   */
  async getHarnessOrNull<T extends ComponentHarness>(query: HarnessQuery<T>): Promise<T | null> {
    return (await this.getRootHarnessLoader()).getHarnessOrNull(query);
  }

  /**
   * Gets a matching harness for the given query and index within the current harness's content.