Method plan

lib/internal/test_runner/test.js:318–327

(count, options = kEmptyObject)

  }

  plan(count, options = kEmptyObject) {
    if (this.#test.plan !== null) {
      throw new ERR_TEST_FAILURE(
        'cannot set plan more than once',
        kTestCodeFailure,
      );
    }

    this.#test.plan = new TestPlan(count, options);
  }

  get assert() {
    if (this.#assert === undefined) {