public void GetJournal_ValidTrackingId_ReturnOperations() { //arrange var expectedResponse = fixture.Create <List <JournalResponseDto> >(); var trackingId = fixture.Create <string>(); calculatorMock.Setup(m => m.JournalQuery(trackingId)) .Returns(expectedResponse); //act var result = sut.JournalQuery(trackingId); //assert var actualResult = result as OkObjectResult; Assert.Equal(expectedResponse, actualResult.Value); }