public void GetTests_should_return_correct_json() { // given + when var actionResult = jsonController.GetTests(It.IsAny <string>()) as ContentResult; // then _testsClient.Verify(x => x.GetTestFile(It.IsAny <string>()), Times.Once); Assert.AreEqual("{\"Tests\":[],\"Filename\":null,\"Variables\":[]}", actionResult.Content); }