public async Task AddSectionAsync_WhenAddingUnexistingSection_ThenReturnNoError()
{
Qubiz.QuizEngine.Services.SectionService.Contract.Section section = new Qubiz.QuizEngine.Services.SectionService.Contract.Section {
ID = Guid.NewGuid(), Name = "Test Section"
};
unitOfWorkMock.Setup(x => x.SectionRepository).Returns(sectionRepositoryMock.Object);
sectionRepositoryMock.Setup(x => x.GetByNameAsync(section.Name)).Returns(Task.FromResult((Section)null));
sectionRepositoryMock.Setup(x => x.Upsert(It.Is <Section>(s => HaveEqualState(section, s))));
unitOfWorkMock.Setup(x => x.SaveAsync()).Returns(() => Task.CompletedTask);
ValidationError[] errors = await sectionService.AddSectionAsync(section);
Assert.AreEqual(0, errors.Length);
}