public void TemporaryBuffer_Add()
        {
            using var buffer = new TemporaryBuffer <int>(1);

            Assert.Equal(0, buffer.Count);

            buffer.Add(100);
            Assert.Equal(1, buffer.Count);
            Assert.True(buffer.EndsWith(100));
            Assert.False(buffer.EndsWith(new [] { 100, 200 }));
            Assert.False(buffer.EndsWith(new [] { 100, 200, 300 }));
            Assert.Equal(100, buffer.Last());

            buffer.Add(200);
            Assert.Equal(2, buffer.Count);
            Assert.False(buffer.EndsWith(100));
            Assert.True(buffer.EndsWith(new [] { 100, 200 }));
            Assert.False(buffer.EndsWith(new [] { 100, 200, 300 }));
            Assert.Equal(200, buffer.Last());

            buffer.DiscardLast();
            Assert.Equal(1, buffer.Count);
            Assert.True(buffer.EndsWith(100));
            Assert.False(buffer.EndsWith(new [] { 100, 200 }));
            Assert.False(buffer.EndsWith(new [] { 100, 200, 300 }));
            Assert.Equal(100, buffer.Last());

            buffer.Add(200);
            buffer.Add(300);
            Assert.Equal(3, buffer.Count);
            Assert.False(buffer.EndsWith(100));
            Assert.True(buffer.EndsWith(new [] { 200, 300 }));
            Assert.True(buffer.EndsWith(new [] { 100, 200, 300 }));
            Assert.Equal(300, buffer.Last());
        }