public void FindByLastName_ReturnsDoctors_WhenCalled([NotNull] IDoctor doctor)
{
// Arrange
var repository = Substitute.For <IDoctorsRepository>();
repository.FindByLastName(Arg.Any <string>()).Returns(CreateList);
InformationFinder sut = CreateSut(repository);
// Act
IEnumerable <IDoctorForResponse> actual = sut.FindByLastName("any name");
// Assert
Assert.Equal(2,
actual.Count());
}