Method _generateMock

packages/jest-mock/src/index.ts:926–962

(
    metadata: MockMetadata<T>,
    callbacks: Array<Function>,
    refs: Record<
      number,
      Record<string, any> | Array<unknown> | RegExp | T | Mock | undefined
    >,
  )

  }

  private _generateMock<T>(
    metadata: MockMetadata<T>,
    callbacks: Array<Function>,
    refs: Record<
      number,
      Record<string, any> | Array<unknown> | RegExp | T | Mock | undefined
    >,
  ): Mocked<T> {
    const mock = this._makeComponent(metadata);
    if (metadata.refID != null) {
      refs[metadata.refID] = mock;
    }

    for (const slot of this._getSlots(metadata.members)) {
      const slotMetadata = (metadata.members && metadata.members[slot]) || {};
      if (slotMetadata.ref == null) {
        mock[slot] = this._generateMock(slotMetadata, callbacks, refs);
      } else {
        callbacks.push(
          (function (ref) {
            return () => (mock[slot] = refs[ref]);
          })(slotMetadata.ref),
        );
      }
    }

    if (
      metadata.type !== 'undefined' &&
      metadata.type !== 'null' &&
      mock.prototype &&
      typeof mock.prototype === 'object'
    ) {
      mock.prototype.constructor = mock;
    }

    return mock as Mocked<T>;
  }

  /**
   * Check whether the given property of an object has been already replaced.