System.Diagnostics.TraceSourceTests.TestTraceListener.WriteLine C# (CSharp) Method

        public override void WriteLine(string message)
        {
            Call(Method.WriteLine);
        }
    }

        public void WriteLineObjectTest()
        {
            var listener = new TestTraceListener();

            listener.Filter = new TestTraceFilter(false);
            listener.WriteLine((Object)"Message");
            Assert.Equal(0, listener.GetCallCount(Method.WriteLine));

            listener.Filter = new TestTraceFilter(true);

            // NOTE: Writing null will result in a newline being written
            listener.WriteLine((Object)null);
            Assert.Equal(1, listener.GetCallCount(Method.WriteLine));

            listener.WriteLine((Object)"Message");
            Assert.Equal(2, listener.GetCallCount(Method.WriteLine));
        }