public void FIFO_supports_Null_entries()
{
var c0 = CultureInfo.InvariantCulture;
var c1 = this;
var f = new FIFOBuffer <object>(2);
AssertEmpty(f);
// When calling with null, it is the IndexOf( T ) that is called
// since T is a reference type.
int iNull = f.IndexOf(null);
iNull.Should().BeLessThan(0);
f.Push(c0);
f.Contains(null).Should().BeFalse();
f.IndexOf(null).Should().BeLessThan(0);
f.PeekLast().Should().BeSameAs(c0);
AssertContains(f, c0);
f.Push(null);
f.Count.Should().Be(2);
f.IndexOf(null).Should().Be(1);
f.IndexOf(c0).Should().Be(0);
f.PeekLast().Should().BeNull();
AssertContains(f, c0, null);
f.Push(c1);
f.IndexOf(null).Should().Be(0);
f.IndexOf(c1).Should().Be(1);
f.Contains(c0).Should().BeFalse();
f.IndexOf(c0).Should().BeLessThan(0);
f.PeekLast().Should().BeSameAs(c1);
AssertContains(f, null, c1);
f.Push(null);
AssertContains(f, c1, null);
f.Push(null);
AssertContains(f, null, null);
f.PopLast().Should().BeNull();
f.PopLast().Should().BeNull();
f.Invoking(sut => sut.PopLast()).Should().Throw <InvalidOperationException>();
}
public void FIFO_supports_Null_entries()
{
var c0 = CultureInfo.InvariantCulture;
var c1 = this;
var f = new FIFOBuffer <object>(2);
AssertEmpty(f);
// When calling with null, it is the IndexOf( T ) that is called
// since T is a reference type.
int iNull = f.IndexOf(null);
Assert.That(iNull, Is.LessThan(0));
f.Push(c0);
Assert.That(f.Contains(null), Is.False);
Assert.That(f.IndexOf(null), Is.LessThan(0));
Assert.That(f.PeekLast(), Is.SameAs(c0));
AssertContains(f, c0);
f.Push(null);
Assert.That(f.Count, Is.EqualTo(2));
Assert.That(f.IndexOf(null), Is.EqualTo(1));
Assert.That(f.IndexOf(c0), Is.EqualTo(0));
Assert.That(f.PeekLast(), Is.Null);
AssertContains(f, c0, null);
f.Push(c1);
Assert.That(f.IndexOf(null), Is.EqualTo(0));
Assert.That(f.IndexOf(c1), Is.EqualTo(1));
Assert.That(f.Contains(c0), Is.False);
Assert.That(f.IndexOf(c0), Is.LessThan(0));
Assert.That(f.PeekLast(), Is.SameAs(c1));
AssertContains(f, null, c1);
f.Push(null);
AssertContains(f, c1, null);
f.Push(null);
AssertContains(f, null, null);
Assert.That(f.PopLast(), Is.Null);
Assert.That(f.PopLast(), Is.Null);
Assert.Throws <InvalidOperationException>(() => f.PopLast());
}
