public async Task WriteFileAsync_WritesResponse_InChunksOfFourKilobytes()
{
// Arrange
var mockReadStream = new Mock<Stream>();
mockReadStream.SetupSequence(s => s.ReadAsync(It.IsAny<byte[]>(), 0, 0x1000, CancellationToken.None))
.Returns(Task.FromResult(0x1000))
.Returns(Task.FromResult(0x500))
.Returns(Task.FromResult(0));
var mockBodyStream = new Mock<Stream>();
mockBodyStream
.Setup(s => s.WriteAsync(It.IsAny<byte[]>(), 0, 0x1000, CancellationToken.None))
.Returns(Task.FromResult(0));
mockBodyStream
.Setup(s => s.WriteAsync(It.IsAny<byte[]>(), 0, 0x500, CancellationToken.None))
.Returns(Task.FromResult(0));
var result = new FileStreamResult(mockReadStream.Object, "text/plain");
var httpContext = GetHttpContext();
httpContext.Response.Body = mockBodyStream.Object;
var actionContext = new ActionContext(httpContext, new RouteData(), new ActionDescriptor());
// Act
await result.ExecuteResultAsync(actionContext);
// Assert
mockReadStream.Verify();
mockBodyStream.Verify();
}
public void Constructor_SetsFileName()
{
// Arrange
var stream = Stream.Null;
// Act
var result = new FileStreamResult(stream, "text/plain");
// Assert
Assert.Equal(stream, result.FileStream);
}
public void Constructor_SetsContentTypeAndParameters()
{
// Arrange
var stream = Stream.Null;
var contentType = "text/plain; charset=us-ascii; p1=p1-value";
var expectedMediaType = contentType;
// Act
var result = new FileStreamResult(stream, contentType);
// Assert
Assert.Equal(stream, result.FileStream);
MediaTypeAssert.Equal(expectedMediaType, result.ContentType);
}
public async Task WriteFileAsync_CopiesProvidedStream_ToOutputStream()
{
// Arrange
// Generate an array of bytes with a predictable pattern
// 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, A, B, C, D, E, F, 10, 11, 12, 13
var originalBytes = Enumerable.Range(0, 0x1234)
.Select(b => (byte)(b % 20)).ToArray();
var originalStream = new MemoryStream(originalBytes);
var httpContext = GetHttpContext();
var outStream = new MemoryStream();
httpContext.Response.Body = outStream;
var actionContext = new ActionContext(httpContext, new RouteData(), new ActionDescriptor());
var result = new FileStreamResult(originalStream, "text/plain");
// Act
await result.ExecuteResultAsync(actionContext);
// Assert
var outBytes = outStream.ToArray();
Assert.True(originalBytes.SequenceEqual(outBytes));
}
public async Task DisablesResponseBuffering_IfBufferingFeatureAvailable()
{
// Arrange
var expectedContentType = "text/foo; charset=us-ascii";
var expected = Encoding.ASCII.GetBytes("Test data");
var originalStream = new MemoryStream(expected);
var httpContext = GetHttpContext();
var bufferingFeature = new TestBufferingFeature();
httpContext.Features.Set<IHttpBufferingFeature>(bufferingFeature);
var outStream = new MemoryStream();
httpContext.Response.Body = outStream;
var actionContext = new ActionContext(httpContext, new RouteData(), new ActionDescriptor());
var result = new FileStreamResult(originalStream, expectedContentType);
// Act
await result.ExecuteResultAsync(actionContext);
// Assert
var outBytes = outStream.ToArray();
Assert.Equal(expected, outBytes);
Assert.Equal(expectedContentType, httpContext.Response.ContentType);
Assert.True(bufferingFeature.DisableResponseBufferingInvoked);
}
public async Task SetsSuppliedContentTypeAndEncoding()
{
// Arrange
var expectedContentType = "text/foo; charset=us-ascii";
// Generate an array of bytes with a predictable pattern
// 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, A, B, C, D, E, F, 10, 11, 12, 13
var originalBytes = Enumerable.Range(0, 0x1234)
.Select(b => (byte)(b % 20)).ToArray();
var originalStream = new MemoryStream(originalBytes);
var httpContext = GetHttpContext();
var outStream = new MemoryStream();
httpContext.Response.Body = outStream;
var actionContext = new ActionContext(httpContext, new RouteData(), new ActionDescriptor());
var result = new FileStreamResult(originalStream, expectedContentType);
// Act
await result.ExecuteResultAsync(actionContext);
// Assert
var outBytes = outStream.ToArray();
Assert.True(originalBytes.SequenceEqual(outBytes));
Assert.Equal(expectedContentType, httpContext.Response.ContentType);
}
