Method constructor

lib/internal/test_runner/mock/mock.js:299–332

(object, propertyName, value)

  #onceValues;

  constructor(object, propertyName, value) {
    this.#onceValues = new SafeMap();
    this.#accesses = [];
    this.#object = object;
    this.#propertyName = propertyName;
    this.#originalValue = object[propertyName];
    this.#value = arguments.length > 2 ? value : this.#originalValue;
    this.#descriptor = ObjectGetOwnPropertyDescriptor(object, propertyName);
    if (!this.#descriptor) {
      throw new ERR_INVALID_ARG_VALUE(
        'propertyName', propertyName, 'is not a property of the object',
      );
    }

    const { configurable, enumerable } = this.#descriptor;
    ObjectDefineProperty(object, propertyName, {
      __proto__: null,
      configurable,
      enumerable,
      get: () => {
        const nextValue = this.#getAccessValue(this.#value);
        const access = {
          __proto__: null,
          type: 'get',
          value: nextValue,
          // eslint-disable-next-line no-restricted-syntax
          stack: new Error(),
        };
        ArrayPrototypePush(this.#accesses, access);
        return nextValue;
      },
      set: this.mockImplementation.bind(this),
    });
  }

  /**
   * Gets an array of recorded accesses (get/set) to the property.