public static void AsInputStream_Equal()
{
Stream stream = TestStreamProvider.CreateReadOnlyStream();
using (IInputStream insOne = stream.AsInputStream())
using (IInputStream insTwo = stream.AsInputStream())
{
Assert.Equal(insOne, insTwo);
}
}
public static void AsInputStream_RoundtripUnwrap()
{
// NetFx Stream -> IInputStream -> NetFx Stream -> roundtrip reference equality is preserved
Stream managedStream = TestStreamProvider.CreateReadOnlyStream();
using (IInputStream ins = managedStream.AsInputStream())
{
Assert.Same(managedStream, ins.AsStreamForRead());
}
}
public static void AsOutputStream_RoundtripUnwrap()
{
// NetFx Stream -> IOutputStream -> NetFx Stream -> roundtrip reference equality is preserved
Stream managedStream = TestStreamProvider.CreateWriteOnlyStream();
using (IOutputStream outs = managedStream.AsOutputStream())
{
Assert.Same(managedStream, outs.AsStreamForWrite());
}
}
public static void AsInputStream_WrapsToSameInstance()
{
Stream managedStream = TestStreamProvider.CreateReadOnlyStream();
using (IInputStream ins = managedStream.AsInputStream())
{
Assert.NotNull(ins);
Assert.Same(ins, managedStream.AsInputStream());
}
}
public static void AsOutputStream_WrapsToSameInstance()
{
Stream managedStream = TestStreamProvider.CreateWriteOnlyStream();
using (IOutputStream outs = managedStream.AsOutputStream())
{
Assert.NotNull(outs);
Assert.Same(outs, managedStream.AsOutputStream());
}
}
public static void AsOutputStream_Equal()
{
Stream stream = TestStreamProvider.CreateWriteOnlyStream();
using (IOutputStream outsOne = stream.AsOutputStream())
using (IOutputStream outsTwo = stream.AsOutputStream())
{
Assert.Equal(outsOne, outsOne);
}
}
public static void AsOutputStream_FromWriteOnlyStream()
{
Stream managedStream = TestStreamProvider.CreateWriteOnlyStream();
using (IOutputStream outs = managedStream.AsOutputStream())
{
Assert.NotNull(outs);
// Adapting a write-only managed Stream to IInputStream must throw a NotSupportedException
Assert.Throws <NotSupportedException>(() => { IInputStream ins = managedStream.AsInputStream(); });
}
}
public static void AsOutputStream_NotEqual()
{
Stream streamOne = TestStreamProvider.CreateWriteOnlyStream();
Stream streamTwo = TestStreamProvider.CreateWriteOnlyStream();
Assert.NotEqual(streamOne, streamTwo);
using (IOutputStream outsOne = streamOne.AsOutputStream())
using (IOutputStream outsTwo = streamTwo.AsOutputStream())
{
Assert.NotEqual(outsOne, outsTwo);
}
}
public static void AsInputStream_NotEqual()
{
Stream streamOne = TestStreamProvider.CreateReadOnlyStream();
Stream streamTwo = TestStreamProvider.CreateReadOnlyStream();
Assert.NotEqual(streamOne, streamTwo);
using (IInputStream insOne = streamOne.AsInputStream())
using (IInputStream insTwo = streamTwo.AsInputStream())
{
Assert.NotEqual(insOne, insTwo);
}
}
private static void DoTestRead(Func <IInputStream> createStreamFunc, InputStreamOptions inputStreamOptions, bool mustInvokeProgressHandler, bool completesSynchronously)
{
IInputStream stream = createStreamFunc();
IBuffer buffer = WindowsRuntimeBuffer.Create(TestStreamProvider.ModelStreamLength);
IAsyncOperationWithProgress <IBuffer, uint> readOp = stream.ReadAsync(buffer, (uint)TestStreamProvider.ModelStreamLength, inputStreamOptions);
if (completesSynchronously)
{
// New readOp for a stream where we know that reading is sycnhronous must have Status = Completed
Assert.Equal(AsyncStatus.Completed, readOp.Status);
}
else
{
// Note the race. By the tie we get here, the status of the op may be started or already completed.
AsyncStatus readOpStatus = readOp.Status;
Assert.True(readOpStatus == AsyncStatus.Completed || readOpStatus == AsyncStatus.Started, "New readOp must have Status = Started or Completed (race)");
}
bool progressCallbackInvoked = false;
bool completedCallbackInvoked = false;
uint readOpId = readOp.Id;
EventWaitHandle waitHandle = new ManualResetEvent(false);
readOp.Progress = (asyncReadOp, bytesCompleted) =>
{
progressCallbackInvoked = true;
// asyncReadOp.Id in a progress callback must match the ID of the asyncReadOp to which the callback was assigned
Assert.Equal(readOpId, asyncReadOp.Id);
// asyncReadOp.Status must be 'Started' for an asyncReadOp in progress
Assert.Equal(AsyncStatus.Started, asyncReadOp.Status);
// bytesCompleted must be in range [0, maxBytesToRead] asyncReadOp in progress
Assert.InRange(bytesCompleted, 0u, (uint)TestStreamProvider.ModelStreamLength);
};
readOp.Completed = (asyncReadOp, passedStatus) =>
{
try
{
completedCallbackInvoked = true;
// asyncReadOp.Id in a completion callback must match the ID of the asyncReadOp to which the callback was assigned
Assert.Equal(readOpId, asyncReadOp.Id);
// asyncReadOp.Status must match passedStatus for a completed asyncReadOp
Assert.Equal(passedStatus, asyncReadOp.Status);
// asyncReadOp.Status must be 'Completed' for a completed asyncReadOp
Assert.Equal(AsyncStatus.Completed, asyncReadOp.Status);
IBuffer resultBuffer = asyncReadOp.GetResults();
// asyncReadOp.GetResults() must not return null for a completed asyncReadOp
Assert.NotNull(resultBuffer);
AssertExtensions.GreaterThan(resultBuffer.Capacity, 0u, "resultBuffer.Capacity should be more than zero in completed callback");
AssertExtensions.GreaterThan(resultBuffer.Length, 0u, "resultBuffer.Length should be more than zero in completed callback");
AssertExtensions.LessThanOrEqualTo(resultBuffer.Length, resultBuffer.Capacity, "resultBuffer.Length should be <= Capacity in completed callback");
if (inputStreamOptions == InputStreamOptions.None)
{
// resultBuffer.Length must be equal to requested number of bytes when an asyncReadOp with
// InputStreamOptions.None completes successfully
Assert.Equal(resultBuffer.Length, (uint)TestStreamProvider.ModelStreamLength);
}
if (inputStreamOptions == InputStreamOptions.Partial)
{
AssertExtensions.LessThanOrEqualTo(resultBuffer.Length, (uint)TestStreamProvider.ModelStreamLength,
"resultBuffer.Length must be <= requested number of bytes with InputStreamOptions.Partial in completed callback");
}
buffer = resultBuffer;
}
finally
{
waitHandle.Set();
}
};
// Now, let's block until the read op is complete.
// We speculate that it will complete within 3500 msec, although under high load it may not be.
// If the test fails we should use a better way to determine if callback is really not invoked, or if it's just too slow.
waitHandle.WaitOne(500);
waitHandle.WaitOne(1000);
waitHandle.WaitOne(2000);
if (mustInvokeProgressHandler)
{
Assert.True(progressCallbackInvoked,
"Progress callback specified to ReadAsync callback must be invoked when reading from this kind of stream");
}
Assert.True(completedCallbackInvoked,
"Completion callback specified to ReadAsync callback must be invoked");
// readOp.Status must be 'Completed' for a completed async readOp
Assert.Equal(AsyncStatus.Completed, readOp.Status);
AssertExtensions.GreaterThan(buffer.Capacity, 0u, "buffer.Capacity should be greater than zero bytes");
AssertExtensions.GreaterThan(buffer.Length, 0u, "buffer.Length should be greater than zero bytes");
AssertExtensions.LessThanOrEqualTo(buffer.Length, buffer.Capacity, "buffer.Length <= buffer.Capacity is required for a completed async readOp");
if (inputStreamOptions == InputStreamOptions.None)
{
// buffer.Length must be equal to requested number of bytes when an async readOp with
// InputStreamOptions.None completes successfully
Assert.Equal((uint)TestStreamProvider.ModelStreamLength, buffer.Length);
}
if (inputStreamOptions == InputStreamOptions.Partial)
{
AssertExtensions.LessThanOrEqualTo(buffer.Length, (uint)TestStreamProvider.ModelStreamLength,
"resultBuffer.Length must be <= requested number of bytes with InputStreamOptions.Partial");
}
byte[] results = new byte[buffer.Length];
buffer.CopyTo(0, results, 0, (int)buffer.Length);
Assert.True(TestStreamProvider.CheckContent(results, 0, (int)buffer.Length),
"Result data returned from AsyncRead must be the same as expected from the test data source");
}