public void CancelBindingFailWithEmptyParameters() { var messagingService = new MessagingService(); Assert.Throws <ArgumentNullException>(() => messagingService.CancelBinding(null, "queue", "routing")); Assert.Throws <ArgumentNullException>(() => messagingService.CancelBinding("exhange", null, "routing")); Assert.Throws <ArgumentNullException>(() => messagingService.CancelBinding("exhange", "queue", null)); }