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());
}