public void SetCorsEngine_NullCorsEngine_Throws()
 {
     Assert.ThrowsArgumentNull(() =>
     {
         CorsHttpConfigurationExtensions.SetCorsEngine(new HttpConfiguration(), null);
     },
                               "corsEngine");
 }
 public void SetCorsEngine_NullHttpConfiguration_Throws()
 {
     Assert.ThrowsArgumentNull(() =>
     {
         CorsHttpConfigurationExtensions.SetCorsEngine(null, new CorsEngine());
     },
                               "httpConfiguration");
 }