public void Emitting_MsgOp_Should_continue_Emitting_When_using_delegate_without_error_handler_but_failing_observer_gets_discarded()
{
var msgOp = MsgOp.CreateMsg("TestSubject", "e8fb57beeb094bbfb545056057a8f7f2", ReadOnlySpan <char> .Empty, new byte[0]);
var countA = 0;
var countB = 0;
var countC = 0;
UnitUnderTest.MsgOpsStream.Subscribe(op =>
{
if (countA == 0)
{
countA += 1;
throw new Exception("Fail");
}
countA += 1;
});
UnitUnderTest.MsgOpsStream.Subscribe(op => countB += 1);
UnitUnderTest.MsgOpsStream.Subscribe(op => countC += 1);
UnitUnderTest.Emit(msgOp);
UnitUnderTest.Emit(msgOp);
countA.Should().Be(1);
countB.Should().Be(2);
countC.Should().Be(2);
}
public void Emitting_MsgOp_Should_continue_Emitting_When_using_observer_with_error_handler_but_failing_observer_gets_discarded()
{
var msgOp = MsgOp.CreateMsg("TestSubject", "f0dd86b9c2804632919b7b78292435e6", ReadOnlySpan <char> .Empty, new byte[0]);
var countA = 0;
var countB = 0;
var countC = 0;
var exToThrow = new Exception(Guid.NewGuid().ToString());
Exception caughtEx = null;
UnitUnderTest.MsgOpsStream.Subscribe(NatsObserver.Delegating <IOp>(op =>
{
if (countA == 0)
{
countA += 1;
throw exToThrow;
}
countA += 1;
}, ex => caughtEx = ex));
UnitUnderTest.MsgOpsStream.Subscribe(NatsObserver.Delegating <IOp>(op => countB += 1));
UnitUnderTest.MsgOpsStream.Subscribe(NatsObserver.Delegating <IOp>(op => countC += 1));
UnitUnderTest.Emit(msgOp);
UnitUnderTest.Emit(msgOp);
caughtEx.Should().BeNull();
countA.Should().Be(1);
countB.Should().Be(2);
countC.Should().Be(2);
}
public void Emitting_MsgOp_Should_continue_Emitting_When_using_observer_without_error_handler_but_failing_observer_gets_discarded()
{
var msgOp = MsgOp.CreateMsg("TestSubject", "60a152d4b5804b23abe088eeac63b55e", ReadOnlySpan <char> .Empty, new byte[0]);
var countA = 0;
var countB = 0;
var countC = 0;
UnitUnderTest.MsgOpsStream.Subscribe(NatsObserver.Delegating <IOp>(op =>
{
if (countA == 0)
{
countA += 1;
throw new Exception("Fail");
}
countA += 1;
}));
UnitUnderTest.MsgOpsStream.Subscribe(NatsObserver.Delegating <IOp>(op => countB += 1));
UnitUnderTest.MsgOpsStream.Subscribe(NatsObserver.Delegating <IOp>(op => countC += 1));
UnitUnderTest.Emit(msgOp);
UnitUnderTest.Emit(msgOp);
countA.Should().Be(1);
countB.Should().Be(2);
countC.Should().Be(2);
}
public void Emitting_MsgOp_Should_continue_Emitting_When_using_delegate_with_error_handler_but_failing_observer_gets_discarded()
{
var msgOp = MsgOp.CreateMsg("TestSubject", "01c549bed5f643e484c2841aff7a0d9d", ReadOnlySpan <char> .Empty, new byte[0]);
var countA = 0;
var countB = 0;
var countC = 0;
var exToThrow = new Exception(Guid.NewGuid().ToString());
Exception caughtEx = null;
UnitUnderTest.MsgOpsStream.Subscribe(op =>
{
if (countA == 0)
{
countA += 1;
throw exToThrow;
}
countA += 1;
}, ex => caughtEx = ex);
UnitUnderTest.MsgOpsStream.Subscribe(op => countB += 1);
UnitUnderTest.MsgOpsStream.Subscribe(op => countC += 1);
UnitUnderTest.Emit(msgOp);
UnitUnderTest.Emit(msgOp);
caughtEx.Should().BeNull();
countA.Should().Be(1);
countB.Should().Be(2);
countC.Should().Be(2);
}
public void Should_be_able_to_apply_predicate()
{
var observer1 = new Mock <IObserver <Data> >();
var observer2 = new Mock <IObserver <Data> >();
UnitUnderTest.Where(d => d.Value <= 2).Subscribe(observer1.Object);
UnitUnderTest.Where(d => d.Value >= 2).Subscribe(observer2.Object);
UnitUnderTest.Emit(new Data {
Value = 1
});
UnitUnderTest.Emit(new Data {
Value = 2
});
UnitUnderTest.Emit(new Data {
Value = 3
});
observer1.Verify(f => f.OnNext(It.IsAny <Data>()), Times.Exactly(2));
observer1.Verify(f => f.OnNext(It.Is <Data>(d => d.Value == 1)), Times.Once);
observer1.Verify(f => f.OnNext(It.Is <Data>(d => d.Value == 2)), Times.Once);
observer2.Verify(f => f.OnNext(It.IsAny <Data>()), Times.Exactly(2));
observer2.Verify(f => f.OnNext(It.Is <Data>(d => d.Value == 2)), Times.Once);
observer2.Verify(f => f.OnNext(It.Is <Data>(d => d.Value == 3)), Times.Once);
}
public void Emitting_non_MsgOp_Should_continue_Emitting_When_using_delegate_with_error_handler_but_failing_observer_gets_discarded()
{
var countA = 0;
var countB = 0;
var countC = 0;
var exToThrow = new Exception(Guid.NewGuid().ToString());
Exception caughtEx = null;
UnitUnderTest.AllOpsStream.Subscribe(op =>
{
if (countA == 0)
{
countA += 1;
throw exToThrow;
}
countA += 1;
}, ex => caughtEx = ex);
UnitUnderTest.AllOpsStream.Subscribe(op => countB += 1);
UnitUnderTest.AllOpsStream.Subscribe(op => countC += 1);
UnitUnderTest.Emit(PingOp.Instance);
UnitUnderTest.Emit(PingOp.Instance);
caughtEx.Should().BeNull();
countA.Should().Be(1);
countB.Should().Be(2);
countC.Should().Be(2);
}
public void Emitting_non_MsgOp_Should_continue_Emitting_When_using_delegate_without_error_handler_but_failing_observer_gets_discarded()
{
var countA = 0;
var countB = 0;
var countC = 0;
UnitUnderTest.AllOpsStream.Subscribe(op =>
{
if (countA == 0)
{
countA += 1;
throw new Exception("Fail");
}
countA += 1;
});
UnitUnderTest.AllOpsStream.Subscribe(op => countB += 1);
UnitUnderTest.AllOpsStream.Subscribe(op => countC += 1);
UnitUnderTest.Emit(PingOp.Instance);
UnitUnderTest.Emit(PingOp.Instance);
countA.Should().Be(1);
countB.Should().Be(2);
countC.Should().Be(2);
}
public void Emitting_Should_invoke_logger_for_error_When_exception_is_thrown()
{
var thrown = new Exception("I FAILED!");
UnitUnderTest.Subscribe(msg => throw thrown);
UnitUnderTest.Emit(Mock.Of <Data>());
FakeLogger.Verify(f => f.Error(It.Is <string>(m => m.Contains("Error in observer while emitting value.")), thrown), Times.Once);
}
public void Emitting_Should_dispatch_to_all_observers()
{
var callCount = 0;
UnitUnderTest.Subscribe(ev => Interlocked.Increment(ref callCount));
UnitUnderTest.Subscribe(ev => Interlocked.Increment(ref callCount));
UnitUnderTest.Emit(Mock.Of <Data>());
callCount.Should().Be(2);
}
public void Emitting_non_MsgOp_Should_not_dispatch_to_MsgOpsStream_but_AllOpsStream()
{
var opStreamRec = false;
var msgOpStreamRec = false;
UnitUnderTest.AllOpsStream.Subscribe(NatsObserver.Delegating <IOp>(op => opStreamRec = true));
UnitUnderTest.MsgOpsStream.Subscribe(NatsObserver.Delegating <MsgOp>(op => msgOpStreamRec = true));
UnitUnderTest.Emit(PingOp.Instance);
opStreamRec.Should().BeTrue();
msgOpStreamRec.Should().BeFalse();
}
public void Emitting_MsgOp_Should_dispatch_to_both_AllOpsStream_and_MsgOpsStream()
{
var msgOp = MsgOp.CreateMsg("TestSubject", "0a3282e769e34677809db5d756dfd768", ReadOnlySpan <char> .Empty, new byte[0]);
var opStreamRec = false;
var msgOpStreamRec = false;
UnitUnderTest.AllOpsStream.Subscribe(NatsObserver.Delegating <IOp>(op => opStreamRec = true));
UnitUnderTest.MsgOpsStream.Subscribe(NatsObserver.Delegating <MsgOp>(op => msgOpStreamRec = true));
UnitUnderTest.Emit(msgOp);
opStreamRec.Should().BeTrue();
msgOpStreamRec.Should().BeTrue();
}
public void Emitting_Should_not_continue_emitting_to_failing_observer_but_to_other_observers_When_an_observer_has_failed()
{
var failingObserver = new Mock <IObserver <Data> >();
failingObserver.Setup(f => f.OnNext(It.IsAny <Data>())).Throws <Exception>();
var nonFailingObserver = new Mock <IObserver <Data> >();
UnitUnderTest.Subscribe(failingObserver.Object);
UnitUnderTest.Subscribe(nonFailingObserver.Object);
UnitUnderTest.Emit(Mock.Of <Data>());
UnitUnderTest.Emit(Mock.Of <Data>());
failingObserver.Verify(f => f.OnNext(It.IsAny <Data>()), Times.Once);
failingObserver.Verify(f => f.OnError(It.IsAny <Exception>()), Times.Never);
nonFailingObserver.Verify(f => f.OnNext(It.IsAny <Data>()), Times.Exactly(2));
nonFailingObserver.Verify(f => f.OnError(It.IsAny <Exception>()), Times.Never);
}
public void Emitting_Should_not_invoke_onError_on_any_observer_When_exception_is_thrown_in_safe_observer()
{
var failingExHandlerWasInvoked = false;
var nonFailingExHandlerWasInvoked = false;
UnitUnderTest.SubscribeSafe(
ev => throw new Exception("I FAILED!"),
ex => failingExHandlerWasInvoked = true);
UnitUnderTest.Subscribe(
ev => { },
ex => nonFailingExHandlerWasInvoked = true);
UnitUnderTest.Emit(Mock.Of <Data>());
failingExHandlerWasInvoked.Should().BeFalse();
nonFailingExHandlerWasInvoked.Should().BeFalse();
}
public void Should_be_able_filter_by_type()
{
var observer1 = new Mock <IObserver <Data> >();
var observer2 = new Mock <IObserver <ExtendedData> >();
UnitUnderTest.OfType <ExtendedData>().Subscribe(observer1.Object);
UnitUnderTest.OfType <ExtendedData>().Subscribe(observer2.Object);
UnitUnderTest.Emit(new ExtendedData {
Value = 1, OtherValue = 2
});
observer1.Verify(f => f.OnNext(It.IsAny <ExtendedData>()), Times.Exactly(1));
observer1.Verify(f => f.OnNext(It.Is <ExtendedData>(d => d.Value == 1 && d.OtherValue == 2)), Times.Once);
observer2.Verify(f => f.OnNext(It.IsAny <ExtendedData>()), Times.Exactly(1));
observer2.Verify(f => f.OnNext(It.Is <ExtendedData>(d => d.Value == 1 && d.OtherValue == 2)), Times.Once);
}
public void Emitting_Should_not_dispatch_to_a_disposed_observer()
{
var s1CallCount = 0;
var s2CallCount = 0;
var s1 = UnitUnderTest.Subscribe(ev =>
{
Interlocked.Increment(ref s1CallCount);
});
var _ = UnitUnderTest.Subscribe(ev =>
{
Interlocked.Increment(ref s2CallCount);
});
UnitUnderTest.Emit(Mock.Of <Data>());
s1.Dispose();
UnitUnderTest.Emit(Mock.Of <Data>());
s1CallCount.Should().Be(1);
s2CallCount.Should().Be(2);
}
public void Emitting_Should_invoke_handler_of_failing_observer_When_using_catchAny_and_a_more_specific_exception_is_thrown()
{
var failingCatchWasInvoked = false;
var failingExHandlerWasInvoked = false;
var nonFailingCatchWasInvoked = false;
var nonFailingExHandlerWasInvoked = false;
UnitUnderTest.CatchAny(ex => failingCatchWasInvoked = true).Subscribe(
ev => throw new NotSupportedException("I FAILED!"),
ex => failingExHandlerWasInvoked = true);
UnitUnderTest.CatchAny(ex => nonFailingCatchWasInvoked = true).Subscribe(
ev => { },
ex => nonFailingExHandlerWasInvoked = true);
UnitUnderTest.Emit(Mock.Of <Data>());
failingCatchWasInvoked.Should().BeTrue();
failingExHandlerWasInvoked.Should().BeFalse();
nonFailingCatchWasInvoked.Should().BeFalse();
nonFailingExHandlerWasInvoked.Should().BeFalse();
}
public void Emitting_Should_not_fail_When_no_observers_exists()
{
Action a = () => UnitUnderTest.Emit(Mock.Of <Data>());
a.Should().NotThrow();
}