public async Task WhenStartedTwiceThenSecondFails()
{
using var broker = new MiniMqttServer();
using var sut = new ConnectorBuilder().Build();
await sut.ConnectAsync(HOST, broker.Port);
Assert.Equal(1, broker.ConnectionCounter);
await Assert.ThrowsAsync <InvalidOperationException>(() => sut.ConnectAsync(HOST, broker.Port));
Assert.Equal(1, broker.ConnectionCounter);
}
public async Task WhenMessageReceivedThenForwardsToConsumers()
{
using var broker = new MiniMqttServer();
var milestone = new SemaphoreSlim(0, 2);
var consumers = new[]
{
new ConsumerStub {
ShouldHandle = false, Handler = _ => milestone.Release()
},
new ConsumerStub {
ShouldHandle = false, Handler = _ => milestone.Release()
}
};
using var sut = new ConnectorBuilder()
.WithConsumers(consumers)
.Build();
await sut.ConnectAsync(HOST, broker.Port);
await broker.PublishAsync("boo", Encoding.ASCII.GetBytes("hoo"));
Assert.True(await milestone.WaitAsync(TimeSpan.FromSeconds(5)));
Assert.True(await milestone.WaitAsync(TimeSpan.FromSeconds(5)));
Assert.All(consumers, c => Assert.Single(c.PacketsToHandle));
Assert.All(consumers, c => Assert.Equal("boo", c.PacketsToHandle.First().Topic));
Assert.All(consumers, c => Assert.Equal("hoo", Encoding.ASCII.GetString(c.PacketsToHandle.First().Payload)));
}
public async Task WhenMessageHandledThenForwardingLoopBreaks()
{
using var broker = new MiniMqttServer();
var milestone = new SemaphoreSlim(0, 2);
var callCounter = 0;
var consumers = new[]
{
new ConsumerStub {
ShouldHandle = true, Handler = _ => milestone.Release()
},
new ConsumerStub {
ShouldHandle = true, Handler = _ => Interlocked.Increment(ref callCounter)
}
};
using var sut = new ConnectorBuilder()
.WithConsumers(consumers)
.Build();
await sut.ConnectAsync(HOST, broker.Port);
await broker.PublishAsync("boo", Encoding.ASCII.GetBytes("hoo"));
Assert.True(await milestone.WaitAsync(TimeSpan.FromSeconds(5)));
// publish again, so if the first message was going to sent to the second subscriber
// it would not be missed
await broker.PublishAsync("boo", Encoding.ASCII.GetBytes("hoo"));
Assert.True(await milestone.WaitAsync(TimeSpan.FromSeconds(5)));
Assert.Equal(2, consumers[0].PacketsToHandle.Count());
Assert.Equal(0, Volatile.Read(ref callCounter));
}
public async Task WhenStartedThenSubscribesForConsumers()
{
using var broker = new MiniMqttServer(PORT);
var consumers = new[] {
new ConsumerStub()
{
Subscriptions = new[] { "foo", "boo" }
},
new ConsumerStub()
{
Subscriptions = new[] { "moo", "shoo" }
}
};
using var sut = new ConnectorBuilder()
.WithConsumers(consumers)
.Build();
await sut.ConnectAsync(HOST, PORT);
var expected = consumers.SelectMany(c => c.Subscriptions).OrderBy(s => s);
Assert.Equal(expected, broker.Subscriptions.OrderBy(s => s));
broker.Dispose();
}
public async Task WhenStartedThenConnectsToServer()
{
using var broker = new MiniMqttServer();
using var sut = new ConnectorBuilder().Build();
await sut.ConnectAsync(HOST, broker.Port);
Assert.Equal(1, broker.ConnectionCounter);
}