pass-mock-object

v1.36.0

effort: 2m

pro+

Warns when verify, verifyNever, when or other similar invocations receive a regular object instead of a mock.

Such invocations must only be given a Mock object.

Example

❌ Bad:

void main() {
  test('some test', () {
    final instance = SomeClass();

    // LINT: This invocation must only be given a Mock object.
    //  Try passing an object that extends Mock.
    when(() => instance.value);
    // LINT: This invocation must only be given a Mock object.
    //  Try passing an object that extends Mock.
    verify(() => instance.value);
    // LINT: This invocation must only be given a Mock object.
    //  Try passing an object that extends Mock.
    verifyZeroInteractions(instance);
  });
}

class SomeClass {
  String? value;
}

✅ Good:

void main() {
  test('some test', () {
    final mock = _SomeMock();

    when(() => mock.value);
    verify(() => mock.value);
    verifyZeroInteractions(mock);
  });
}

class _SomeMock extends Mock implements SomeClass {}

Example​

Example