Method filter

src/cdk/testing/component-harness.ts:678–684

* Filters a list of harnesses on this predicate. * @param harnesses The list of harnesses to filter. * @return A list of harnesses that satisfy this predicate.

(harnesses: T[])

   * @return A list of harnesses that satisfy this predicate.
   */
  async filter(harnesses: T[]): Promise<T[]> {
    if (harnesses.length === 0) {
      return [];
    }
    const results = await parallel(() => harnesses.map(h => this.evaluate(h)));
    return harnesses.filter((_, i) => results[i]);
  }

  /**
   * Evaluates whether the given harness satisfies this predicate.