public void IsFileAccepted_Test() { _MockAppConfig.Setup(x => x.AcceptedFiles).Returns(".csv,.xlsx"); GenericHelpers genericHelper = new GenericHelpers(); Assert.IsTrue(genericHelper.IsFileAccepted(_MockAppConfig.Object, ".csv")); Assert.IsTrue(genericHelper.IsFileAccepted(_MockAppConfig.Object, ".xlsx")); Assert.IsFalse(genericHelper.IsFileAccepted(_MockAppConfig.Object, ".jpg")); Assert.IsFalse(genericHelper.IsFileAccepted(_MockAppConfig.Object, ".txt")); Assert.IsFalse(genericHelper.IsFileAccepted(_MockAppConfig.Object, ".png")); }