public async Task GetAllAsync_ReturnsOkAndListOfStudents()
{
Mock <IStudentRepository> studentRepositoryMock = new Mock <IStudentRepository>();
studentRepositoryMock.Setup(m => m.GetAllAsync()).ReturnsAsync(this.GetStudents());
IStudentService studentService = new StudentService(studentRepositoryMock.Object);
var studentController = new StudentsController(studentService, this.CreateMapper());
var expected = this.GetStudents();
var result = await studentController.GetAllAsync();
var okResult = Assert.IsType <OkObjectResult>(result);
var actual = Assert.IsAssignableFrom <IEnumerable <DataAccess.Model.Student> >(okResult.Value);
actual.Should().NotBeNull();
actual.Should().HaveCountGreaterThan(0);
actual.Should().HaveCount(2);
actual.Should().BeEquivalentTo(expected);
}