public async Task Validate_Should_Succeed_When_Command_Valid()
{
var student = new Student(Guid.NewGuid(), "existing", "Student");
var studentsRepository = NSubstitute.Substitute.For <IStudentsRepository>();
studentsRepository.FindById(Arg.Any <Guid>(), Arg.Any <CancellationToken>())
.ReturnsForAnyArgs(student);
var course = new Course(Guid.NewGuid(), "existing course");
var coursesRepository = Substitute.For <ICoursesRepository>();
coursesRepository.FindByIdAsync(Arg.Any <Guid>(), Arg.Any <CancellationToken>())
.ReturnsForAnyArgs(course);
var unitOfWork = Substitute.For <ISchoolUnitOfWork>();
unitOfWork.StudentsRepository.ReturnsForAnyArgs(studentsRepository);
unitOfWork.CoursesRepository.ReturnsForAnyArgs(coursesRepository);
var sut = new WithdrawValidator(unitOfWork);
var command = new Withdraw(course.Id, student.Id);
var result = await sut.ValidateAsync(command, CancellationToken.None);
result.Should().NotBeNull();
result.Success.Should().BeTrue();
result.Errors.Should().BeEmpty();
}
public async Task Validate_Should_Fail_When_Course_Does_Not_Exists()
{
var unitOfWork = Substitute.For <ISchoolUnitOfWork>();
var sut = new WithdrawValidator(unitOfWork);
var command = new Withdraw(Guid.NewGuid(), Guid.NewGuid());
var result = await sut.ValidateAsync(command, CancellationToken.None);
result.Should().NotBeNull();
result.Success.Should().BeFalse();
result.Errors.Should().Contain(e =>
e.Context == nameof(Withdraw.CourseId) && e.Message.Contains(command.CourseId.ToString()));
}
public async Task ValidateAsync_should_fail_when_Student_does_not_exists()
{
var repo = NSubstitute.Substitute.For <IStudentsRepository>();
var unitOfWork = NSubstitute.Substitute.For <ISchoolUnitOfWork>();
unitOfWork.StudentsRepository.ReturnsForAnyArgs(repo);
var sut = new WithdrawValidator(unitOfWork);
var command = new Withdraw(Guid.NewGuid(), Guid.NewGuid());
var result = await sut.ValidateAsync(command, CancellationToken.None);
result.Should().NotBeNull();
result.Success.Should().BeFalse();
result.Errors.Should().Contain(e =>
e.Context == nameof(Withdraw.StudentId) && e.Message.Contains(command.StudentId.ToString()));
}