public async Task DoesNotClose_UnderlyingStream_OnDisposingWriter()
{
// Arrange
var stream = new TestMemoryStream();
var writer = new HttpResponseStreamWriter(stream, Encoding.UTF8);
// Act
await writer.WriteAsync("Hello");
writer.Close();
// Assert
Assert.Equal(0, stream.CloseCallCount);
}
public async Task DoesNotDispose_UnderlyingStream_OnDisposingWriter()
{
// Arrange
var stream = new TestMemoryStream();
var writer = new HttpResponseStreamWriter(stream, Encoding.UTF8);
// Act
await writer.WriteAsync("Hello world");
writer.Dispose();
// Assert
Assert.Equal(0, stream.DisposeCallCount);
}
public async Task FlushesBuffer_OnFlushAsync(int byteLength)
{
// Arrange
var stream = new TestMemoryStream();
var writer = new HttpResponseStreamWriter(stream, Encoding.UTF8);
await writer.WriteAsync(new string('a', byteLength));
// Act
await writer.FlushAsync();
// Assert
Assert.Equal(1, stream.FlushAsyncCallCount);
Assert.Equal(byteLength, stream.Length);
}
public async Task DoesNotFlush_UnderlyingStream_OnClosingWriter()
{
// Arrange
var stream = new TestMemoryStream();
var writer = new HttpResponseStreamWriter(stream, Encoding.UTF8);
// Act
await writer.WriteAsync("Hello");
writer.Close();
// Assert
Assert.Equal(0, stream.FlushCallCount);
Assert.Equal(0, stream.FlushAsyncCallCount);
}
public async Task WriteCharArrayAsync_WritesToStream(int byteLength)
{
// Arrange
var stream = new TestMemoryStream();
var writer = new HttpResponseStreamWriter(stream, Encoding.UTF8);
// Act
using (writer)
{
await writer.WriteAsync((new string('a', byteLength)).ToCharArray());
}
// Assert
Assert.Equal(byteLength, stream.Length);
}
public async Task DoesNotWriteBOM()
{
// Arrange
var memoryStream = new MemoryStream();
var encodingWithBOM = new UTF8Encoding(encoderShouldEmitUTF8Identifier: true);
var writer = new HttpResponseStreamWriter(memoryStream, encodingWithBOM);
var expectedData = new byte[] { 97, 98, 99, 100 }; // without BOM
// Act
using (writer)
{
await writer.WriteAsync("abcd");
}
// Assert
Assert.Equal(expectedData, memoryStream.ToArray());
}
public async Task FlushesBuffer_ButNotStream_OnFlushAsync(int byteLength)
{
// Arrange
var stream = new TestMemoryStream();
var writer = new HttpResponseStreamWriter(stream, Encoding.UTF8);
await writer.WriteAsync(new string('a', byteLength));
var expectedWriteCount = Math.Ceiling((double)byteLength / HttpResponseStreamWriter.DefaultBufferSize);
// Act
await writer.FlushAsync();
// Assert
Assert.Equal(0, stream.FlushAsyncCallCount);
Assert.Equal(expectedWriteCount, stream.WriteAsyncCallCount);
Assert.Equal(byteLength, stream.Length);
}
public async Task WritesData_InExpectedEncoding(string data, string encodingName)
{
// Arrange
var encoding = Encoding.GetEncoding(encodingName);
var expectedBytes = encoding.GetBytes(data);
var stream = new MemoryStream();
var writer = new HttpResponseStreamWriter(stream, encoding);
// Act
using (writer)
{
await writer.WriteAsync(data);
}
// Assert
Assert.Equal(expectedBytes, stream.ToArray());
}
public async Task DoesNotWriteBOM()
{
// Arrange
var memoryStream = new MemoryStream();
var encodingWithBOM = new UTF8Encoding(encoderShouldEmitUTF8Identifier: true);
var writer = new HttpResponseStreamWriter(memoryStream, encodingWithBOM);
var expectedData = new byte[] { 97, 98, 99, 100 }; // without BOM
// Act
using (writer)
{
await writer.WriteAsync("abcd");
}
// Assert
Assert.Equal(expectedData, memoryStream.ToArray());
}
public async Task WriteCharAsync_WritesToStream(int byteLength)
{
// Arrange
var stream = new TestMemoryStream();
var writer = new HttpResponseStreamWriter(stream, Encoding.UTF8);
// Act
using (writer)
{
for (var i = 0; i < byteLength; i++)
{
await writer.WriteAsync('a');
}
}
// Assert
Assert.Equal(byteLength, stream.Length);
}
public async Task FlushesBuffer_OnClose(int byteLength)
{
// Arrange
var stream = new TestMemoryStream();
var writer = new HttpResponseStreamWriter(stream, Encoding.UTF8);
await writer.WriteAsync(new string('a', byteLength));
// Act
#if DNX451
writer.Close();
#else
writer.Dispose();
#endif
// Assert
Assert.Equal(0, stream.FlushCallCount);
Assert.Equal(0, stream.FlushAsyncCallCount);
Assert.Equal(byteLength, stream.Length);
}
public async Task WritesData_OfDifferentLength_InExpectedEncoding(
char character,
int charCount,
string encodingName)
{
// Arrange
var encoding = Encoding.GetEncoding(encodingName);
string data = new string(character, charCount);
var expectedBytes = encoding.GetBytes(data);
var stream = new MemoryStream();
var writer = new HttpResponseStreamWriter(stream, encoding);
// Act
using (writer)
{
await writer.WriteAsync(data);
}
// Assert
Assert.Equal(expectedBytes, stream.ToArray());
}
public async Task WritesData_OfDifferentLength_InExpectedEncoding(
char character,
int charCount,
string encodingName)
{
// Arrange
var encoding = Encoding.GetEncoding(encodingName);
string data = new string(character, charCount);
var expectedBytes = encoding.GetBytes(data);
var stream = new MemoryStream();
var writer = new HttpResponseStreamWriter(stream, encoding);
// Act
using (writer)
{
await writer.WriteAsync(data);
}
// Assert
Assert.Equal(expectedBytes, stream.ToArray());
}
public async Task WritesData_InExpectedEncoding(string data, string encodingName)
{
// Arrange
var encoding = Encoding.GetEncoding(encodingName);
var expectedBytes = encoding.GetBytes(data);
var stream = new MemoryStream();
var writer = new HttpResponseStreamWriter(stream, encoding);
// Act
using (writer)
{
await writer.WriteAsync(data);
}
// Assert
Assert.Equal(expectedBytes, stream.ToArray());
}
public async Task WriteCharArrayAsync_WritesToStream(int byteLength)
{
// Arrange
var stream = new TestMemoryStream();
var writer = new HttpResponseStreamWriter(stream, Encoding.UTF8);
// Act
using (writer)
{
await writer.WriteAsync((new string('a', byteLength)).ToCharArray());
}
// Assert
Assert.Equal(byteLength, stream.Length);
}
public async Task WriteCharAsync_WritesToStream(int byteLength)
{
// Arrange
var stream = new TestMemoryStream();
var writer = new HttpResponseStreamWriter(stream, Encoding.UTF8);
// Act
using (writer)
{
for (var i = 0; i < byteLength; i++)
{
await writer.WriteAsync('a');
}
}
// Assert
Assert.Equal(byteLength, stream.Length);
}
public async Task FlushesBuffer_ButNotStream_OnFlushAsync(int byteLength)
{
// Arrange
var stream = new TestMemoryStream();
var writer = new HttpResponseStreamWriter(stream, Encoding.UTF8);
await writer.WriteAsync(new string('a', byteLength));
var expectedWriteCount = Math.Ceiling((double)byteLength / HttpResponseStreamWriter.DefaultBufferSize);
// Act
await writer.FlushAsync();
// Assert
Assert.Equal(0, stream.FlushAsyncCallCount);
Assert.Equal(expectedWriteCount, stream.WriteAsyncCallCount);
Assert.Equal(byteLength, stream.Length);
}
public async Task FlushesBuffer_OnDispose(int byteLength)
{
// Arrange
var stream = new TestMemoryStream();
var writer = new HttpResponseStreamWriter(stream, Encoding.UTF8);
await writer.WriteAsync(new string('a', byteLength));
// Act
writer.Dispose();
// Assert
Assert.Equal(0, stream.FlushCallCount);
Assert.Equal(0, stream.FlushAsyncCallCount);
Assert.Equal(byteLength, stream.Length);
}
