public void Count_WhenCountIsNotSet_ThrowsException()
{
FakeDataSource fakeDataSource = new FakeDataSource();
Action act = () => { fakeDataSource.Count(); };
act.Should().Throw <NotImplementedException>();
}
public void Count_WhenCountIsSet_ReturnsCount()
{
FakeDataSource fakeDataSource = new FakeDataSource().WithCount(7);
fakeDataSource.Count().Should().Be(7);
}