public void Enumerable_ShouldBeEmpty_WhenAllSourcesAreEmpty()
{
// Arrange
var source1 = Enumerable.Empty <int>();
var source2 = Enumerable.Empty <int>();
var source3 = Enumerable.Empty <int>();
var subject = new ConcatenatedSequence <int>(source1, source2, source3);
// Act
var result = subject.ToList();
// Assert
result.Should().BeEmpty();
}
public void Enumerable_ShouldBe_ConcatenatedSources()
{
// Arrange
var source1 = new [] { "A" };
var source2 = new [] { "B", "C", "D" };
var source3 = new [] { "E", "F" };
var subject = new ConcatenatedSequence <string>(source1, source2, source3);
var expected = new[] { "A", "B", "C", "D", "E", "F" };
// Act
var result = subject.ToList();
// Assert
result.Should().BeEquivalentTo(expected);
}