public void InputOutputSizeCombosFromUtf32()
{
for (int i = 0; i < BufferSizeRange; i++)
{
string inputString = TextEncoderTestHelper.GenerateValidString(i, 0, TextEncoderConstants.Utf8TwoBytesLastCodePoint);
ReadOnlySpan <byte> input = Text.Encoding.UTF32.GetBytes(inputString);
Span <byte> expected = Text.Encoding.UTF8.GetBytes(inputString);
for (int j = 0; j < BufferSizeRange * 4; j++)
{
Span <byte> output = new byte[j];
var status = Encodings.Utf32.ToUtf8(input, output, out int consumed, out int written);
if (status == OperationStatus.DestinationTooSmall)
{
Assert.True(consumed < input.Length, "consumed is too large");
Assert.True(written < expected.Length, "written is too large");
}
else
{
Assert.Equal(OperationStatus.Done, status);
Assert.Equal(input.Length, consumed);
Assert.Equal(expected.Length, written);
}
Assert.True(expected.Slice(0, written).SequenceEqual(output.Slice(0, written)), "Incorrect byte sequence");
}
}
}
public void InputBufferContainsNonASCII(TextEncoderTestHelper.CodePointSubset subset)
{
string inputString = TextEncoderTestHelper.GenerateValidString(TextEncoderConstants.DataLength, subset);
ValidateFromUtf16(inputString);
ValidateFromUtf32(inputString);
}
public void InputBufferEmpty(TextEncoderTestHelper.SupportedEncoding from)
{
string inputString = TextEncoderTestHelper.GenerateValidString(0, 0, TextEncoderConstants.Utf8ThreeBytesLastCodePoint);
byte[] expectedBytes;
Span <byte> encodedBytes;
int bytesWritten;
switch (from)
{
case TextEncoderTestHelper.SupportedEncoding.FromUtf8:
byte[] inputStringUtf8 = testEncoder.GetBytes(inputString);
expectedBytes = Text.Encoding.Convert(testEncoder, testEncoder, inputStringUtf8);
encodedBytes = Span <byte> .Empty; // Output buffer is size 0
Assert.True(utf8.TryEncode(ReadOnlySpan <byte> .Empty, encodedBytes, out int charactersConsumed, out bytesWritten));
Assert.Equal(0, charactersConsumed);
encodedBytes = new Span <byte>(new byte[1]); // Output buffer is not size 0
Assert.True(utf8.TryEncode(ReadOnlySpan <byte> .Empty, encodedBytes, out charactersConsumed, out bytesWritten));
Assert.Equal(0, charactersConsumed);
break;
case TextEncoderTestHelper.SupportedEncoding.FromUtf16:
byte[] inputStringUtf16 = testEncoderUnicode.GetBytes(inputString);
expectedBytes = Text.Encoding.Convert(testEncoderUnicode, testEncoder, inputStringUtf16);
encodedBytes = Span <byte> .Empty;
Assert.True(utf8.TryEncode(ReadOnlySpan <char> .Empty, encodedBytes, out charactersConsumed, out bytesWritten));
Assert.Equal(0, charactersConsumed);
encodedBytes = new Span <byte>(new byte[1]);
Assert.True(utf8.TryEncode(ReadOnlySpan <char> .Empty, encodedBytes, out charactersConsumed, out bytesWritten));
Assert.Equal(0, charactersConsumed);
break;
case TextEncoderTestHelper.SupportedEncoding.FromString:
inputStringUtf16 = testEncoderUnicode.GetBytes(inputString);
expectedBytes = Text.Encoding.Convert(testEncoderUnicode, testEncoder, inputStringUtf16);
encodedBytes = Span <byte> .Empty;
Assert.True(utf8.TryEncode("", encodedBytes, out bytesWritten));
encodedBytes = new Span <byte>(new byte[1]);
Assert.True(utf8.TryEncode("", encodedBytes, out bytesWritten));
break;
case TextEncoderTestHelper.SupportedEncoding.FromUtf32:
default:
byte[] inputStringUtf32 = testEncoderUtf32.GetBytes(inputString);
expectedBytes = Text.Encoding.Convert(testEncoderUtf32, testEncoder, inputStringUtf32);
encodedBytes = Span <byte> .Empty;
Assert.True(utf8.TryEncode(ReadOnlySpan <uint> .Empty, encodedBytes, out charactersConsumed, out bytesWritten));
Assert.Equal(0, charactersConsumed);
encodedBytes = new Span <byte>(new byte[1]);
Assert.True(utf8.TryEncode(ReadOnlySpan <uint> .Empty, encodedBytes, out charactersConsumed, out bytesWritten));
Assert.Equal(0, charactersConsumed);
break;
}
Assert.Equal(expectedBytes.Length, bytesWritten);
Assert.True(expectedBytes.AsSpan().SequenceEqual(encodedBytes.Slice(0, bytesWritten)));
}
public void OutputEmptyFromUtf32()
{
string inputString = TextEncoderTestHelper.GenerateValidString(TextEncoderConstants.DataLength, 0, TextEncoderConstants.Utf8ThreeBytesLastCodePoint);
ReadOnlySpan <byte> input = Text.Encoding.UTF32.GetBytes(inputString);
Assert.Equal(OperationStatus.DestinationTooSmall, Encodings.Utf32.ToUtf8(input, Span <byte> .Empty, out int consumed, out int written));
Assert.Equal(0, consumed);
Assert.Equal(0, written);
}
public void OutputBufferEmpty(TextEncoderTestHelper.SupportedEncoding from)
{
string inputString = TextEncoderTestHelper.GenerateValidString(TextEncoderConstants.DataLength, 0, TextEncoderConstants.Utf8ThreeBytesLastCodePoint);
byte[] expectedBytes;
Span <byte> encodedBytes = Span <byte> .Empty;
int bytesWritten;
int charactersConsumed;
switch (from)
{
case TextEncoderTestHelper.SupportedEncoding.FromUtf8:
byte[] inputStringUtf8 = testEncoder.GetBytes(inputString);
expectedBytes = Text.Encoding.Convert(testEncoder, testEncoder, inputStringUtf8);
ReadOnlySpan <byte> inputUtf8 = inputStringUtf8;
Assert.False(utf8.TryEncode(inputUtf8, encodedBytes, out charactersConsumed, out bytesWritten));
break;
case TextEncoderTestHelper.SupportedEncoding.FromUtf16:
byte[] inputStringUtf16 = testEncoderUnicode.GetBytes(inputString);
expectedBytes = Text.Encoding.Convert(testEncoderUnicode, testEncoder, inputStringUtf16);
ReadOnlySpan <char> inputUtf16 = inputStringUtf16.AsSpan().NonPortableCast <byte, char>();
Assert.False(utf8.TryEncode(inputUtf16, encodedBytes, out charactersConsumed, out bytesWritten));
break;
case TextEncoderTestHelper.SupportedEncoding.FromString:
inputStringUtf16 = testEncoderUnicode.GetBytes(inputString);
expectedBytes = Text.Encoding.Convert(testEncoderUnicode, testEncoder, inputStringUtf16);
string inputStr = inputString;
Assert.False(utf8.TryEncode(inputStr, encodedBytes, out bytesWritten));
charactersConsumed = 0;
break;
case TextEncoderTestHelper.SupportedEncoding.FromUtf32:
default:
byte[] inputStringUtf32 = testEncoderUtf32.GetBytes(inputString);
expectedBytes = Text.Encoding.Convert(testEncoderUtf32, testEncoder, inputStringUtf32);
ReadOnlySpan <uint> input = inputStringUtf32.AsSpan().NonPortableCast <byte, uint>();
Assert.False(utf8.TryEncode(input, encodedBytes, out charactersConsumed, out bytesWritten));
break;
}
Assert.Equal(0, charactersConsumed);
Assert.Equal(0, bytesWritten);
Assert.True(Span <byte> .Empty.SequenceEqual(encodedBytes));
}
public void InputLargerThanOutputFromUtf32()
{
string inputString = TextEncoderTestHelper.GenerateValidString(TextEncoderConstants.DataLength, 0, TextEncoderConstants.Utf8ThreeBytesLastCodePoint);
ReadOnlySpan <byte> input = Text.Encoding.UTF32.GetBytes(inputString);
Span <byte> expected = Text.Encoding.UTF8.GetBytes(inputString);
Span <byte> output = new byte[expected.Length / 2];
Assert.Equal(OperationStatus.DestinationTooSmall, Encodings.Utf32.ToUtf8(input, output, out int consumed, out int written));
Assert.True(consumed < input.Length, "Unexpectedly consumed entire input");
Assert.True(written < expected.Length, "Unexpectedly wrote entire output");
Assert.True(expected.Slice(0, written).SequenceEqual(output.Slice(0, written)), "Incorrect byte sequence");
input = input.Slice(consumed);
expected = expected.Slice(written);
output = new byte[expected.Length];
Assert.Equal(OperationStatus.Done, Encodings.Utf32.ToUtf8(input, output, out consumed, out written));
Assert.Equal(input.Length, consumed);
Assert.Equal(expected.Length, written);
Assert.True(expected.SequenceEqual(output), "Incorrect byte sequence");
}
public void OutputLargerThatInputFromUtf32()
{
string inputString1 = TextEncoderTestHelper.GenerateValidString(TextEncoderConstants.DataLength, 0, TextEncoderConstants.Utf8ThreeBytesLastCodePoint);
string inputString2 = TextEncoderTestHelper.GenerateValidString(TextEncoderConstants.DataLength, 0, TextEncoderConstants.Utf8ThreeBytesLastCodePoint);
ReadOnlySpan <byte> input1 = Text.Encoding.UTF32.GetBytes(inputString1);
ReadOnlySpan <byte> input2 = Text.Encoding.UTF32.GetBytes(inputString1);
Span <byte> expected1 = Text.Encoding.UTF8.GetBytes(inputString1);
Span <byte> expected2 = Text.Encoding.UTF8.GetBytes(inputString2);
Span <byte> output = new byte[expected1.Length + expected2.Length];
Assert.Equal(OperationStatus.Done, Encodings.Utf32.ToUtf8(input1, output, out int consumed1, out int written1));
Assert.Equal(input1.Length, consumed1);
Assert.Equal(expected1.Length, written1);
Assert.Equal(OperationStatus.Done, Encodings.Utf32.ToUtf8(input2, output.Slice(written1), out int consumed2, out int written2));
Assert.Equal(input2.Length, consumed2);
Assert.Equal(expected2.Length, written2);
Assert.True(expected1.SequenceEqual(output.Slice(0, written1)));
Assert.True(expected2.SequenceEqual(output.Slice(written1)));
}
public void OutputBufferLargerThanInputBuffer(TextEncoderTestHelper.SupportedEncoding from)
{
string inputString1 = TextEncoderTestHelper.GenerateValidString(TextEncoderConstants.DataLength, 0, TextEncoderConstants.Utf8ThreeBytesLastCodePoint);
string inputString2 = TextEncoderTestHelper.GenerateValidString(TextEncoderConstants.DataLength, 0, TextEncoderConstants.Utf8ThreeBytesLastCodePoint);
byte[] expectedBytes1;
byte[] expectedBytes2;
Span <byte> encodedBytes;
int expectedBytesWritten;
int bytesWritten;
switch (from)
{
case TextEncoderTestHelper.SupportedEncoding.FromUtf8:
byte[] inputString1Utf8 = testEncoder.GetBytes(inputString1);
byte[] inputString2Utf8 = testEncoder.GetBytes(inputString2);
expectedBytes1 = Text.Encoding.Convert(testEncoder, testEncoder, inputString1Utf8);
expectedBytes2 = Text.Encoding.Convert(testEncoder, testEncoder, inputString2Utf8);
expectedBytesWritten = expectedBytes1.Length + expectedBytes2.Length;
encodedBytes = new Span <byte>(new byte[expectedBytesWritten]);
ReadOnlySpan <byte> firstUtf8 = inputString1Utf8;
ReadOnlySpan <byte> secondUtf8 = inputString2Utf8;
Assert.True(utf8.TryEncode(firstUtf8, encodedBytes, out int charactersConsumed, out bytesWritten));
Assert.Equal(firstUtf8.Length, charactersConsumed);
Assert.Equal(expectedBytes1.Length, bytesWritten);
Assert.True(utf8.TryEncode(secondUtf8, encodedBytes.Slice(bytesWritten), out charactersConsumed, out bytesWritten));
Assert.Equal(secondUtf8.Length, charactersConsumed);
Assert.Equal(expectedBytes2.Length, bytesWritten);
break;
case TextEncoderTestHelper.SupportedEncoding.FromUtf16:
byte[] inputString1Utf16 = testEncoderUnicode.GetBytes(inputString1);
byte[] inputString2Utf16 = testEncoderUnicode.GetBytes(inputString2);
expectedBytes1 = Text.Encoding.Convert(testEncoderUnicode, testEncoder, inputString1Utf16);
expectedBytes2 = Text.Encoding.Convert(testEncoderUnicode, testEncoder, inputString2Utf16);
expectedBytesWritten = expectedBytes1.Length + expectedBytes2.Length;
encodedBytes = new Span <byte>(new byte[expectedBytesWritten]);
string firstInputStr = inputString1;
string secondInputStr = inputString2;
Assert.True(utf8.TryEncode(firstInputStr, encodedBytes, out bytesWritten));
Assert.Equal(expectedBytes1.Length, bytesWritten);
Assert.True(utf8.TryEncode(secondInputStr, encodedBytes.Slice(bytesWritten), out bytesWritten));
Assert.Equal(expectedBytes2.Length, bytesWritten);
break;
case TextEncoderTestHelper.SupportedEncoding.FromString:
inputString1Utf16 = testEncoderUnicode.GetBytes(inputString1);
inputString2Utf16 = testEncoderUnicode.GetBytes(inputString2);
expectedBytes1 = Text.Encoding.Convert(testEncoderUnicode, testEncoder, inputString1Utf16);
expectedBytes2 = Text.Encoding.Convert(testEncoderUnicode, testEncoder, inputString2Utf16);
expectedBytesWritten = expectedBytes1.Length + expectedBytes2.Length;
encodedBytes = new Span <byte>(new byte[expectedBytesWritten]);
ReadOnlySpan <char> firstUtf16 = inputString1Utf16.AsSpan().NonPortableCast <byte, char>();
ReadOnlySpan <char> secondUtf16 = inputString2Utf16.AsSpan().NonPortableCast <byte, char>();
Assert.True(utf8.TryEncode(firstUtf16, encodedBytes, out charactersConsumed, out bytesWritten));
Assert.Equal(firstUtf16.Length, charactersConsumed);
Assert.Equal(expectedBytes1.Length, bytesWritten);
Assert.True(utf8.TryEncode(secondUtf16, encodedBytes.Slice(bytesWritten), out charactersConsumed, out bytesWritten));
Assert.Equal(secondUtf16.Length, charactersConsumed);
Assert.Equal(expectedBytes2.Length, bytesWritten);
break;
case TextEncoderTestHelper.SupportedEncoding.FromUtf32:
default:
byte[] inputString1Utf32 = testEncoderUtf32.GetBytes(inputString1);
byte[] inputString2Utf32 = testEncoderUtf32.GetBytes(inputString2);
expectedBytes1 = Text.Encoding.Convert(testEncoderUtf32, testEncoder, inputString1Utf32);
expectedBytes2 = Text.Encoding.Convert(testEncoderUtf32, testEncoder, inputString2Utf32);
expectedBytesWritten = expectedBytes1.Length + expectedBytes2.Length;
encodedBytes = new Span <byte>(new byte[expectedBytesWritten]);
ReadOnlySpan <uint> firstInput = inputString1Utf32.AsSpan().NonPortableCast <byte, uint>();
ReadOnlySpan <uint> secondInput = inputString2Utf32.AsSpan().NonPortableCast <byte, uint>();
Assert.True(utf8.TryEncode(firstInput, encodedBytes, out charactersConsumed, out bytesWritten));
Assert.Equal(firstInput.Length, charactersConsumed);
Assert.Equal(expectedBytes1.Length, bytesWritten);
Assert.True(utf8.TryEncode(secondInput, encodedBytes.Slice(bytesWritten), out charactersConsumed, out bytesWritten));
Assert.Equal(secondInput.Length, charactersConsumed);
Assert.Equal(expectedBytes2.Length, bytesWritten);
break;
}
var expectedBytes = new byte[expectedBytesWritten];
Array.Copy(expectedBytes1, expectedBytes, expectedBytes1.Length);
Array.Copy(expectedBytes2, 0, expectedBytes, expectedBytes1.Length, expectedBytes2.Length);
Assert.True(expectedBytes.AsSpan().SequenceEqual(encodedBytes));
}
public void InputBufferLargerThanOutputBuffer(TextEncoderTestHelper.SupportedEncoding from)
{
string inputString = TextEncoderTestHelper.GenerateValidString(TextEncoderConstants.DataLength, 0, TextEncoderConstants.Utf8ThreeBytesLastCodePoint);
byte[] expectedBytes;
Span <byte> encodedBytes1;
Span <byte> encodedBytes2;
int expectedBytesWritten;
int bytesWritten1;
int bytesWritten2;
switch (from)
{
case TextEncoderTestHelper.SupportedEncoding.FromUtf8:
byte[] inputStringUtf8 = testEncoder.GetBytes(inputString);
expectedBytes = Text.Encoding.Convert(testEncoder, testEncoder, inputStringUtf8);
expectedBytesWritten = expectedBytes.Length;
encodedBytes1 = new Span <byte>(new byte[expectedBytesWritten / 2]);
ReadOnlySpan <byte> inputUtf8 = inputStringUtf8;
Assert.False(utf8.TryEncode(inputUtf8, encodedBytes1, out int charactersConsumed1, out bytesWritten1));
encodedBytes2 = new Span <byte>(new byte[expectedBytesWritten - bytesWritten1]);
Assert.True(utf8.TryEncode(inputUtf8.Slice(charactersConsumed1), encodedBytes2, out int charactersConsumed2, out bytesWritten2));
Assert.Equal(inputUtf8.Length, charactersConsumed1 + charactersConsumed2);
break;
case TextEncoderTestHelper.SupportedEncoding.FromUtf16:
byte[] inputStringUtf16 = testEncoderUnicode.GetBytes(inputString);
expectedBytes = Text.Encoding.Convert(testEncoderUnicode, testEncoder, inputStringUtf16);
expectedBytesWritten = expectedBytes.Length;
encodedBytes1 = new Span <byte>(new byte[expectedBytesWritten / 2]);
ReadOnlySpan <char> inputUtf16 = inputStringUtf16.AsSpan().NonPortableCast <byte, char>();
Assert.False(utf8.TryEncode(inputUtf16, encodedBytes1, out charactersConsumed1, out bytesWritten1));
encodedBytes2 = new Span <byte>(new byte[expectedBytesWritten - bytesWritten1]);
Assert.True(utf8.TryEncode(inputUtf16.Slice(charactersConsumed1), encodedBytes2, out charactersConsumed2, out bytesWritten2));
Assert.Equal(inputUtf16.Length, charactersConsumed1 + charactersConsumed2);
break;
case TextEncoderTestHelper.SupportedEncoding.FromString: // Open issue: https://github.com/dotnet/corefxlab/issues/1515
/*inputStringUtf16 = testEncoderUnicode.GetBytes(inputString);
* expectedBytes = Text.Encoding.Convert(testEncoderUnicode, testEncoder, inputStringUtf16);
* expectedBytesWritten = expectedBytes.Length;
* encodedBytes1 = new Span<byte>(new byte[expectedBytesWritten / 2]);
* string inputStr = inputString;
* Assert.False(utf8.TryEncode(inputStr, encodedBytes1, out bytesWritten1));
* encodedBytes2 = new Span<byte>(new byte[expectedBytesWritten - bytesWritten1]);
* Assert.True(utf8.TryEncode(inputStr.Substring(charactersConsumed1), encodedBytes2, out bytesWritten2));*/
return;
case TextEncoderTestHelper.SupportedEncoding.FromUtf32:
default:
byte[] inputStringUtf32 = testEncoderUtf32.GetBytes(inputString);
expectedBytes = Text.Encoding.Convert(testEncoderUtf32, testEncoder, inputStringUtf32);
expectedBytesWritten = expectedBytes.Length;
encodedBytes1 = new Span <byte>(new byte[expectedBytesWritten / 2]);
ReadOnlySpan <uint> input = inputStringUtf32.AsSpan().NonPortableCast <byte, uint>();
Assert.False(utf8.TryEncode(input, encodedBytes1, out charactersConsumed1, out bytesWritten1));
encodedBytes2 = new Span <byte>(new byte[expectedBytesWritten - bytesWritten1]);
Assert.True(utf8.TryEncode(input.Slice(charactersConsumed1), encodedBytes2, out charactersConsumed2, out bytesWritten2));
Assert.Equal(input.Length, charactersConsumed1 + charactersConsumed2);
break;
}
Assert.Equal(expectedBytesWritten, bytesWritten1 + bytesWritten2);
var encodedBytes = new Span <byte>(new byte[expectedBytesWritten]);
encodedBytes1.CopyTo(encodedBytes);
encodedBytes2.CopyTo(encodedBytes.Slice(encodedBytes1.Length));
Assert.True(expectedBytes.AsSpan().SequenceEqual(encodedBytes));
}
public void InputOutputBufferSizeCombinations(TextEncoderTestHelper.SupportedEncoding from)
{
string inputString;
int bytesWritten;
byte[] expectedBytes;
Span <byte> encodedBytes;
int expectedBytesWritten;
bool retVal;
int testUpToCharLength = 30;
switch (from)
{
case TextEncoderTestHelper.SupportedEncoding.FromUtf8:
for (int i = 0; i < testUpToCharLength; i++)
{
inputString = TextEncoderTestHelper.GenerateValidString(i, 0, TextEncoderConstants.Utf8TwoBytesLastCodePoint);
byte[] inputStringUtf8 = testEncoder.GetBytes(inputString);
expectedBytes = Text.Encoding.Convert(testEncoder, testEncoder, inputStringUtf8);
expectedBytesWritten = expectedBytes.Length;
ReadOnlySpan <byte> inputUtf8 = inputStringUtf8;
for (int j = 0; j < testUpToCharLength * 4; j++)
{
encodedBytes = new Span <byte>(new byte[j]);
retVal = utf8.TryEncode(inputUtf8, encodedBytes, out int charactersConsumed, out bytesWritten);
if (expectedBytesWritten > j) // output buffer is too small
{
Assert.False(retVal);
Assert.True(charactersConsumed < inputUtf8.Length);
Assert.True(expectedBytesWritten > bytesWritten);
Assert.True(expectedBytes.AsSpan().Slice(0, bytesWritten).SequenceEqual(encodedBytes.Slice(0, bytesWritten)));
}
else
{
Assert.True(retVal);
Assert.Equal(charactersConsumed, inputUtf8.Length);
Assert.Equal(expectedBytesWritten, bytesWritten);
Assert.True(expectedBytes.AsSpan().SequenceEqual(encodedBytes.Slice(0, bytesWritten)));
}
}
}
break;
case TextEncoderTestHelper.SupportedEncoding.FromUtf16:
for (int i = 0; i < testUpToCharLength; i++)
{
inputString = TextEncoderTestHelper.GenerateValidString(i, 0, TextEncoderConstants.Utf8TwoBytesLastCodePoint);
byte[] inputStringUtf16 = testEncoderUnicode.GetBytes(inputString);
expectedBytes = Text.Encoding.Convert(testEncoderUnicode, testEncoder, inputStringUtf16);
expectedBytesWritten = expectedBytes.Length;
ReadOnlySpan <char> inputUtf16 = inputStringUtf16.AsSpan().NonPortableCast <byte, char>();
for (int j = 0; j < testUpToCharLength * 4; j++)
{
encodedBytes = new Span <byte>(new byte[j]);
retVal = utf8.TryEncode(inputUtf16, encodedBytes, out int charactersConsumed, out bytesWritten);
if (expectedBytesWritten > j) // output buffer is too small
{
Assert.False(retVal);
Assert.True(charactersConsumed < inputUtf16.Length);
Assert.True(expectedBytesWritten > bytesWritten);
Assert.True(expectedBytes.AsSpan().Slice(0, bytesWritten).SequenceEqual(encodedBytes.Slice(0, bytesWritten)));
}
else
{
Assert.True(retVal);
Assert.Equal(charactersConsumed, inputUtf16.Length);
Assert.Equal(expectedBytesWritten, bytesWritten);
Assert.True(expectedBytes.AsSpan().SequenceEqual(encodedBytes.Slice(0, bytesWritten)));
}
}
}
break;
case TextEncoderTestHelper.SupportedEncoding.FromString:
for (int i = 0; i < testUpToCharLength; i++)
{
inputString = TextEncoderTestHelper.GenerateValidString(i, 0, TextEncoderConstants.Utf8TwoBytesLastCodePoint);
byte[] inputStringUtf16 = testEncoderUnicode.GetBytes(inputString);
expectedBytes = Text.Encoding.Convert(testEncoderUnicode, testEncoder, inputStringUtf16);
expectedBytesWritten = expectedBytes.Length;
string inputStr = inputString;
for (int j = 0; j < testUpToCharLength * 4; j++)
{
encodedBytes = new Span <byte>(new byte[j]);
retVal = utf8.TryEncode(inputStr, encodedBytes, out bytesWritten);
if (expectedBytesWritten > j) // output buffer is too small
{
Assert.False(retVal);
Assert.True(expectedBytesWritten > bytesWritten);
Assert.True(expectedBytes.AsSpan().Slice(0, bytesWritten).SequenceEqual(encodedBytes.Slice(0, bytesWritten)));
}
else
{
Assert.True(retVal);
Assert.Equal(expectedBytesWritten, bytesWritten);
Assert.True(expectedBytes.AsSpan().SequenceEqual(encodedBytes.Slice(0, bytesWritten)));
}
}
}
break;
case TextEncoderTestHelper.SupportedEncoding.FromUtf32:
default:
for (int i = 0; i < testUpToCharLength; i++)
{
inputString = TextEncoderTestHelper.GenerateValidString(i, 0, TextEncoderConstants.Utf8TwoBytesLastCodePoint);
byte[] inputStringUtf32 = testEncoderUtf32.GetBytes(inputString);
expectedBytes = Text.Encoding.Convert(testEncoderUtf32, testEncoder, inputStringUtf32);
expectedBytesWritten = expectedBytes.Length;
ReadOnlySpan <uint> input = inputStringUtf32.AsSpan().NonPortableCast <byte, uint>();
for (int j = 0; j < testUpToCharLength * 4; j++)
{
encodedBytes = new Span <byte>(new byte[j]);
retVal = utf8.TryEncode(input, encodedBytes, out int charactersConsumed, out bytesWritten);
if (expectedBytesWritten > j) // output buffer is too small
{
Assert.False(retVal);
Assert.True(charactersConsumed < input.Length);
Assert.True(expectedBytesWritten > bytesWritten);
Assert.True(expectedBytes.AsSpan().Slice(0, bytesWritten).SequenceEqual(encodedBytes.Slice(0, bytesWritten)));
}
else
{
Assert.True(retVal);
Assert.Equal(charactersConsumed, input.Length);
Assert.Equal(expectedBytesWritten, bytesWritten);
Assert.True(expectedBytes.AsSpan().SequenceEqual(encodedBytes.Slice(0, bytesWritten)));
}
}
}
break;
}
}
