public void InputEndsTooEarlyAndRestartsFromUtf32()
{
uint[] codepoints1 = TextEncoderTestHelper.GenerateValidUtf32CodePoints(TextEncoderConstants.DataLength);
uint[] codepoints2 = TextEncoderTestHelper.GenerateValidUtf32CodePoints(TextEncoderConstants.DataLength);
uint[] inputAll = new uint[codepoints1.Length + codepoints2.Length];
Array.Copy(codepoints1, inputAll, codepoints1.Length);
Array.Copy(codepoints2, 0, inputAll, codepoints1.Length, codepoints2.Length);
ReadOnlySpan <byte> expected = Text.Encoding.Convert(Text.Encoding.UTF32, Text.Encoding.UTF8, MemoryMarshal.AsBytes(inputAll.AsSpan()).ToArray());
Span <byte> output = new byte[expected.Length];
ReadOnlySpan <byte> input = MemoryMarshal.AsBytes(inputAll.AsSpan(0, codepoints1.Length));
input = input.Slice(0, input.Length - 2); // Strip a couple bytes from last good code point
Assert.Equal(OperationStatus.NeedMoreData, Encodings.Utf32.ToUtf8(input, output, out int consumed, out int written));
Assert.True(input.Length > consumed, "Consumed too many bytes [first half]");
Assert.NotEqual(expected.Length, written);
Assert.True(expected.Slice(0, written).SequenceEqual(output.Slice(0, written)), "Invalid output sequence [first half]");
input = MemoryMarshal.AsBytes(inputAll.AsSpan()).Slice(consumed);
expected = expected.Slice(written);
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.Slice(0, written)), "Invalid output sequence [second half]");
}
