public void FindById_ReturnsDay_FindByDoctorId([NotNull] IDay day)
{
// Arrange
var repository = Substitute.For <IDaysRepository>();
repository.FindByDoctorId(1).Returns(CreateList);
InformationFinder sut = CreateSut(repository);
// Act
IEnumerable <IDayForResponse> actual = sut.FindByDoctorId(1);
// Assert
Assert.Equal(2,
actual.Count());
}