public async Task GetLessons_WithSujectId_RetunrsLessonsList() { //Arrange var subjectId = AutoFaker.Generate <int>(); var lessons = AutoFaker.Generate <List <Lesson> >(); _lessonService.Setup(x => x.GetLessons(It.IsAny <int>())) .ReturnsAsync(lessons); //Act var result = await _sut.GetLessons(subjectId); //Assert result.Should().BeOfType <OkObjectResult>(); ((OkObjectResult)result).StatusCode.Should().Be(StatusCodes.Status200OK); ((OkObjectResult)result).Value.Should().BeEquivalentTo(lessons); }