Method stringMatches

src/cdk/testing/component-harness.ts:633–644

* Checks if the specified nullable string value matches the given pattern. * @param value The nullable string value to check, or a Promise resolving to the * nullable string value. * @param pattern The pattern the value is expected to match. If `pattern` is a string, * `value` is exp

(
    value: string | null | Promise<string | null>,
    pattern: string | RegExp | null,
  )

   * @return Whether the value matches the pattern.
   */
  static async stringMatches(
    value: string | null | Promise<string | null>,
    pattern: string | RegExp | null,
  ): Promise<boolean> {
    value = await value;
    if (pattern === null) {
      return value === null;
    } else if (value === null) {
      return false;
    }
    return typeof pattern === 'string' ? value === pattern : pattern.test(value);
  }

  /**
   * Adds a predicate function to be run against candidate harnesses.