public void GetEnumeratorTest()
        {
            using ValueStringBuilder sb = ValueStringBuilder.CreateFrom("Hello".AsSpan());

            var enumerator = sb.GetEnumerator();

            Assert.True(enumerator.MoveNext());
            Assert.AreEqual('H', enumerator.Current);

            Assert.True(enumerator.MoveNext());
            Assert.AreEqual('e', enumerator.Current);

            Assert.True(enumerator.MoveNext());
            Assert.AreEqual('l', enumerator.Current);

            Assert.True(enumerator.MoveNext());
            Assert.AreEqual('l', enumerator.Current);

            Assert.True(enumerator.MoveNext());
            Assert.AreEqual('o', enumerator.Current);

            Assert.False(enumerator.MoveNext());
        }