jest-serializer-no-mock-function

    1.0.0 • Public • Published

    Jest snapshot serializer that prevents serializing mocked functions

    Upon upgrading to Jest 22 I've ran into snapshot size increase due to serialization of mocked functions. This pacakge makes it serialize to a normal function.

    Install

    Add the package as a dev-dependency:

    # With npm 
    npm install --save-dev jest-serializer-no-mock-function
     
    # With yarn 
    yarn add --dev jest-serializer-no-mock-function

    Update package.json to let Jest know about the serializer:

    "jest"{
      "snapshotSerializers": ["jest-serializer-no-mock-function"]
    }

    Example

    test('Mock test', () => {
      const mock = jest.fn().mockName('myMock');
     
      mock('hello', { foo: 'bar' });
     
      expect(mock).toMatchSnapshot();
    });

    Output with:

    exports[`Mock test 1`] = `[Function]`;

    Output without:

    exports[`Mock test 1`] = `
    [MockFunction myMock] {
      "calls": Array [
        Array [
          "hello",
          Object {
            "foo": "bar",
          },
        ],
      ],
    }
    `;

    Install

    npm i jest-serializer-no-mock-function

    DownloadsWeekly Downloads

    40

    Version

    1.0.0

    License

    MIT

    Last publish

    Collaborators

    • tornjv