public void FIFO_change_capacity_preserves_items()
{
FIFOBuffer <int> f = new FIFOBuffer <int>(0);
f.Capacity.Should().Be(0);
AssertEmpty(f);
f.Push(5);
AssertEmpty(f);
f.Push(12);
AssertEmpty(f);
f.Capacity = 1;
f.Capacity.Should().Be(1);
AssertEmpty(f);
f.Push(5);
AssertContains(f, 5);
f.Push(6);
AssertContains(f, 6);
f.Capacity = 2;
f.Capacity.Should().Be(2);
AssertContains(f, 6);
f.Push(7);
AssertContains(f, 6, 7);
f.Push(8);
AssertContains(f, 7, 8);
f.Capacity = 4;
f.Capacity.Should().Be(4);
AssertContains(f, 7, 8);
f.Push(9);
AssertContains(f, 7, 8, 9);
f.Push(10);
AssertContains(f, 7, 8, 9, 10);
f.Push(11);
AssertContains(f, 8, 9, 10, 11);
f.Capacity = 7;
f.Capacity.Should().Be(7);
AssertContains(f, 8, 9, 10, 11);
f.Push(12);
AssertContains(f, 8, 9, 10, 11, 12);
f.Push(13);
AssertContains(f, 8, 9, 10, 11, 12, 13);
f.Push(14);
AssertContains(f, 8, 9, 10, 11, 12, 13, 14);
f.Push(15);
AssertContains(f, 9, 10, 11, 12, 13, 14, 15);
f.Capacity = 2;
f.Capacity.Should().Be(2);
AssertContains(f, 14, 15);
f.Capacity = 3;
f.Capacity.Should().Be(3);
AssertContains(f, 14, 15);
f.Push(16);
AssertContains(f, 14, 15, 16);
f.Capacity = 2;
f.Capacity.Should().Be(2);
AssertContains(f, 15, 16);
f.Capacity = 1;
f.Capacity.Should().Be(1);
AssertContains(f, 16);
f.Capacity = 0;
f.Capacity.Should().Be(0);
AssertEmpty(f);
f.Capacity = 2;
f.Capacity = 2;
f.Capacity.Should().Be(2);
f.ToString().Should().Be(String.Format("Count = {0} (Capacity = {1})", 0, 2));
//ExceptionTest
f.Invoking(sut => sut.Capacity = -1).Should().Throw <ArgumentException>();
f.Invoking(sut => new FIFOBuffer <int>(-1)).Should().Throw <ArgumentException>();
f.Invoking(sut => sut.CopyTo(new int[2], 0, -1)).Should().Throw <IndexOutOfRangeException>();
}
public void FIFO_change_capacity_preserves_items()
{
FIFOBuffer <int> f = new FIFOBuffer <int>(0);
Assert.That(f.Capacity, Is.EqualTo(0));
AssertEmpty(f);
f.Push(5);
AssertEmpty(f);
f.Push(12);
AssertEmpty(f);
f.Capacity = 1;
Assert.That(f.Capacity, Is.EqualTo(1));
AssertEmpty(f);
f.Push(5);
AssertContains(f, 5);
f.Push(6);
AssertContains(f, 6);
f.Capacity = 2;
Assert.That(f.Capacity, Is.EqualTo(2));
AssertContains(f, 6);
f.Push(7);
AssertContains(f, 6, 7);
f.Push(8);
AssertContains(f, 7, 8);
f.Capacity = 4;
Assert.That(f.Capacity, Is.EqualTo(4));
AssertContains(f, 7, 8);
f.Push(9);
AssertContains(f, 7, 8, 9);
f.Push(10);
AssertContains(f, 7, 8, 9, 10);
f.Push(11);
AssertContains(f, 8, 9, 10, 11);
f.Capacity = 7;
Assert.That(f.Capacity, Is.EqualTo(7));
AssertContains(f, 8, 9, 10, 11);
f.Push(12);
AssertContains(f, 8, 9, 10, 11, 12);
f.Push(13);
AssertContains(f, 8, 9, 10, 11, 12, 13);
f.Push(14);
AssertContains(f, 8, 9, 10, 11, 12, 13, 14);
f.Push(15);
AssertContains(f, 9, 10, 11, 12, 13, 14, 15);
f.Capacity = 2;
Assert.That(f.Capacity, Is.EqualTo(2));
AssertContains(f, 14, 15);
f.Capacity = 3;
Assert.That(f.Capacity, Is.EqualTo(3));
AssertContains(f, 14, 15);
f.Push(16);
AssertContains(f, 14, 15, 16);
f.Capacity = 2;
Assert.That(f.Capacity, Is.EqualTo(2));
AssertContains(f, 15, 16);
f.Capacity = 1;
Assert.That(f.Capacity, Is.EqualTo(1));
AssertContains(f, 16);
f.Capacity = 0;
Assert.That(f.Capacity, Is.EqualTo(0));
AssertEmpty(f);
f.Capacity = 2;
f.Capacity = 2;
Assert.That(f.Capacity, Is.EqualTo(2));
Assert.That(f.ToString(), Is.EqualTo(String.Format("Count = {0} (Capacity = {1})", 0, 2)));
//ExceptionTest
Assert.Throws <ArgumentException>(() => f.Capacity = -1);
Assert.Throws <ArgumentException>(() => new FIFOBuffer <int>(-1));
Assert.Throws <IndexOutOfRangeException>(() => f.CopyTo(new int[2], 0, -1));
}