public void GetSerializedMessageSerializesUsingHubProtocolIfNoCacheAvailable()
{
var invocation = new InvocationMessage("Foo", new object[0]);
var message = new SerializedHubMessage(invocation);
var protocol = new DummyHubProtocol("p1");
var serialized = message.GetSerializedMessage(protocol);
Assert.Equal(DummyHubProtocol.DummySerialization, serialized.ToArray());
Assert.Collection(protocol.GetWrittenMessages(),
actualMessage => Assert.Same(invocation, actualMessage));
}
public void GetSerializedMessageReturnsCachedSerializationIfAvailable()
{
var invocation = new InvocationMessage("Foo", new object[0]);
var message = new SerializedHubMessage(invocation);
var protocol = new DummyHubProtocol("p1");
// This should cache it
_ = message.GetSerializedMessage(protocol);
// Get it again
var serialized = message.GetSerializedMessage(protocol);
Assert.Equal(DummyHubProtocol.DummySerialization, serialized.ToArray());
// We should still only have written one message
Assert.Collection(protocol.GetWrittenMessages(),
actualMessage => Assert.Same(invocation, actualMessage));
}
public async Task SerializingTwoMessagesFromTheSameProtocolSimultaneouslyResultsInOneCachedItemAsync(int numberOfSerializationsToPreCache)
{
var invocation = new InvocationMessage("Foo", new object[0]);
var message = new SerializedHubMessage(invocation);
// "Pre-cache" the requested number of serializations (so we can test scenarios involving each of the fields and the fallback list)
for (var i = 0; i < numberOfSerializationsToPreCache; i++)
{
_ = message.GetSerializedMessage(new DummyHubProtocol($"p{i}"));
}
var onWrite = SyncPoint.Create(2, out var syncPoints);
var protocol = new DummyHubProtocol("test", () => onWrite().Wait());
// Serialize once, but hold at the Hub Protocol
var firstSerialization = Task.Run(() => message.GetSerializedMessage(protocol));
await syncPoints[0].WaitForSyncPoint();
// Serialize again, which should hit the lock
var secondSerialization = Task.Run(() => message.GetSerializedMessage(protocol));
Assert.False(secondSerialization.IsCompleted);
// Release both instances of the syncpoint
syncPoints[0].Continue();
syncPoints[1].Continue();
// Everything should finish and only one serialization should be written
await firstSerialization.DefaultTimeout();
await secondSerialization.DefaultTimeout();
Assert.Collection(message.GetAllSerializations().Skip(numberOfSerializationsToPreCache).ToArray(),
serializedMessage =>
{
Assert.Equal("test", serializedMessage.ProtocolName);
Assert.Equal(DummyHubProtocol.DummySerialization, serializedMessage.Serialized.ToArray());
});
}