public void Test_MemoryBufferWriterOfT_Clear()
{
Memory <byte> memory = new byte[256];
var writer = new MemoryBufferWriter <byte>(memory);
Span <byte> span = writer.GetSpan(4).Slice(0, 4);
byte[] data = { 1, 2, 3, 4 };
data.CopyTo(span);
writer.Advance(4);
Assert.AreEqual(writer.WrittenCount, 4);
Assert.IsTrue(span.SequenceEqual(data));
writer.Clear();
Assert.AreEqual(writer.WrittenCount, 0);
Assert.IsTrue(span.ToArray().All(b => b == 0));
}