void CopyToWorks(int index, string data, string expected)
{
var charData = "abcdefgh".ToCharArray();
var output = new FastStringOutput();
output.Append(data);
output.CopyTo(charData, index);
var s = new string(charData);
Assert.Equal(expected, s);
}
void AppendNullWorks()
{
var output = new FastStringOutput();
Assert.Empty(output.ToString());
output.Append(null);
Assert.Empty(output.ToString());
output.Append('a');
Assert.Equal("a", output.ToString());
output.Append(null);
Assert.Equal("a", output.ToString());
}
void ClearWorks()
{
var output = new FastStringOutput();
Assert.Empty(output.ToString());
output.Append('a');
Assert.Equal("a", output.ToString());
output.Clear();
Assert.Empty(output.ToString());
output.Append("abc");
Assert.Equal("abc", output.ToString());
output.Clear();
Assert.Empty(output.ToString());
}
void AsSpanWorks()
{
var output = new FastStringOutput();
Assert.Empty(output.AsSpan().ToString());
output.Append('a');
Assert.Equal("a", output.AsSpan().ToString());
output.Append('b');
Assert.Equal("ab", output.AsSpan().ToString());
for (int i = 0; i < 1000; i++)
{
output.Append('c');
}
Assert.Equal("ab" + new string('c', 1000), output.AsSpan().ToString());
output.Clear();
Assert.Empty(output.AsSpan().ToString());
}
void LengthWorks()
{
var output = new FastStringOutput();
Assert.Equal(0, output.Length);
output.Append('a');
Assert.Equal(1, output.Length);
output.Append('b');
Assert.Equal(2, output.Length);
output.Append("cde");
Assert.Equal(5, output.Length);
output.Clear();
Assert.Equal(0, output.Length);
output.Append("abc");
Assert.Equal(3, output.Length);
output.Clear();
Assert.Equal(0, output.Length);
}