public void SupportedImageTest() { //Test with unsupported extension ImageHelper testIH1 = new ImageHelper(); ImageModel test1 = new ImageModel { Error = false}; string unsupported = ".avi"; test1 = testIH1.SupportedImage(test1, unsupported); Assert.IsTrue(test1.Error); //Test with supported extension ImageHelper testIH2 = new ImageHelper(); ImageModel test2 = new ImageModel { Error = false }; string supported = ".gif"; test2 = testIH2.SupportedImage(test2, supported); Assert.IsFalse(test2.Error); }