public void StringSlice_Basics()
{
StringSlice slice = "Hello, there!";
Assert.Equal(13, slice.Length);
Assert.Equal('H', slice[0]);
Assert.Equal(' ', slice[6]);
Assert.True(slice.StartsWith('H'));
Assert.False(slice.StartsWith('h'));
Assert.True(slice.StartsWith("Hello"));
Assert.False(slice.StartsWith("hello"));
Assert.True(slice.StartsWith("hello", StringComparison.OrdinalIgnoreCase));
slice = slice.Substring(7, 3);
Assert.Equal(3, slice.Length);
Assert.Equal(0, slice.CompareTo("the"));
StringBuilder result = new StringBuilder();
slice.AppendTo(result);
Assert.Equal(3, result.Length);
Assert.Equal("the", result.ToString());
slice = slice.Substring(3);
Assert.Equal(0, slice.Length);
}
private void EmptyChecks(StringSlice empty)
{
// Length should be zero
Assert.Equal(0, empty.Length);
// StartsWith should fail gracefully
Assert.False(empty.StartsWith(':'));
Assert.False(empty.StartsWith((StringSlice)":"));
// CompareTo should fail gracefully
Assert.Equal(-1, empty.CompareTo(":"));
// AppendTo shouldn't do anything
StringBuilder result = new StringBuilder();
empty.AppendTo(result);
Assert.Equal(0, result.Length);
// Substring(0) should work
StringSlice other = empty.Substring(0);
}