public static void Trim(string input)
{
if (input is null)
{
return; // don't want to null ref
}
Utf8String utf8Input = u8(input);
void RunTest(Func <Utf8String, Utf8String> utf8TrimAction, Func <string, string> utf16TrimAction)
{
Utf8String utf8Trimmed = utf8TrimAction(utf8Input);
string utf16Trimmed = utf16TrimAction(input);
if (utf16Trimmed.Length == input.Length)
{
Assert.Same(utf8Input, utf8Trimmed); // Trimming should no-op, return original input
}
else if (utf16Trimmed.Length == 0)
{
Assert.Same(Utf8String.Empty, utf8Trimmed); // Trimming an all-whitespace input, return Empty
}
else
{
Assert.True(Utf8String.AreEquivalent(utf8Trimmed, utf16Trimmed));
}
}
RunTest(ustr => ustr.Trim(), str => str.Trim());
RunTest(ustr => ustr.TrimStart(), str => str.TrimStart());
RunTest(ustr => ustr.TrimEnd(), str => str.TrimEnd());
}
public static void AreEquivalent_Utf8StringAndString_NullHandling()
{
Assert.True(Utf8String.AreEquivalent((Utf8String)null, (string)null));
Assert.False(Utf8String.AreEquivalent(Utf8String.Empty, (string)null));
Assert.False(Utf8String.AreEquivalent((Utf8String)null, string.Empty));
Assert.True(Utf8String.AreEquivalent(Utf8String.Empty, string.Empty));
}
public static void AreEquivalent_Tests(string utf8Input, string utf16Input, bool expected)
{
Utf8String asUtf8 = u8(utf8Input);
// Call all three overloads
Assert.Equal(expected, Utf8String.AreEquivalent(asUtf8, utf16Input));
Assert.Equal(expected, Utf8String.AreEquivalent(asUtf8.AsSpan(), utf16Input.AsSpan()));
Assert.Equal(expected, Utf8String.AreEquivalent(asUtf8.AsBytes(), utf16Input.AsSpan()));
}
public static void Normalize(string utf16Source, string utf16Expected, NormalizationForm normalizationForm)
{
Utf8String utf8Source = u8(utf16Source);
// Quick IsNormalized tests
Assert.Equal(utf16Source == utf16Expected, utf8Source.IsNormalized(normalizationForm));
// Normalize and return new Utf8String instances
Utf8String utf8Normalized = utf8Source.Normalize(normalizationForm);
Assert.True(Utf8String.AreEquivalent(utf8Normalized, utf16Expected));
}
[InlineData(new byte[] { 0xED }, new char[] { '\uD800' })] // don't support partials
public static void AreEquivalent_IllFormedData_AlwaysReturnsFalse(byte[] asUtf8, char[] asUtf16)
{
Assert.False(Utf8String.AreEquivalent(asUtf8, asUtf16));
}