public void CaseWrite_Async_InvalidArguments_ThrowsArgumentException()
 {
     Channel.CaseBuilder cb = Channel.CaseRead(Channel.Create <int>(), i => { });
     Assert.Throws <ArgumentNullException>("channel", () => cb.CaseWrite <int>(null, 0, (Func <Task>)null));
     Assert.Throws <ArgumentNullException>("channel", () => cb.CaseWrite <int>(null, 0, delegate { return(Task.CompletedTask); }));
     Assert.Throws <ArgumentNullException>("func", () => cb.CaseWrite <int>(Channel.Create <int>(), 0, (Func <Task>)null));
 }
 public void CaseWrite_Sync_InvalidArguments_ThrowsArgumentException()
 {
     Channel.CaseBuilder cb = Channel.CaseRead(Channel.Create <int>(), i => { });
     Assert.Throws <ArgumentNullException>("channel", () => cb.CaseWrite <int>(null, 0, (Action)null));
     Assert.Throws <ArgumentNullException>("channel", () => cb.CaseWrite <int>(null, 0, (Action) delegate { }));
     Assert.Throws <ArgumentNullException>("action", () => cb.CaseWrite <int>(Channel.Create <int>(), 0, (Action)null));
 }
        public void CaseReadWrite_Async_CallMultipleTimes_IdempotentResult()
        {
            Channel.CaseBuilder builder1 = Channel.CaseRead(Channel.Create <int>(), i => Task.CompletedTask);
            Assert.Same(builder1, builder1.CaseRead(Channel.Create <int>(), i => Task.CompletedTask));
            Assert.Same(builder1, builder1.CaseWrite(Channel.Create <string>(), "", () => Task.CompletedTask));
            Assert.Same(builder1, builder1.CaseDefault(() => Task.CompletedTask));

            Channel.CaseBuilder builder2 = Channel.CaseWrite(Channel.Create <int>(), 0, () => Task.CompletedTask);
            Assert.Same(builder2, builder2.CaseRead(Channel.Create <int>(), i => Task.CompletedTask));
            Assert.Same(builder2, builder2.CaseWrite(Channel.Create <string>(), "", () => Task.CompletedTask));
            Assert.Same(builder2, builder2.CaseDefault(() => Task.CompletedTask));
        }