System.Diagnostics.TraceSourceTests.TraceClassTests.WriteLineIf4Test C# (CSharp) Method

        public void WriteLineIf4Test()
        {
            var listener = new TestTraceListener();
            Trace.Listeners.Add(listener);
            Trace.WriteLineIf(false, "Message", "Category");
            Assert.Equal(0, listener.GetCallCount(Method.WriteLine));
            Trace.WriteLineIf(true, "Message", "Category");
            Assert.Equal(1, listener.GetCallCount(Method.WriteLine));
        }