public void GetClientValidationRules_ReturnsValidationParameters() { // Arrange var expected = ValidationAttributeUtil.GetRequiredErrorMessage("Length"); var provider = TestModelMetadataProvider.CreateDefaultProvider(); var metadata = provider.GetMetadataForProperty(typeof(string), "Length"); var attribute = new RequiredAttribute(); var adapter = new RequiredAttributeAdapter(attribute); var serviceCollection = new ServiceCollection(); var requestServices = serviceCollection.BuildServiceProvider(); var context = new ClientModelValidationContext(metadata, provider, requestServices); // Act var rules = adapter.GetClientValidationRules(context); // Assert var rule = Assert.Single(rules); Assert.Equal("required", rule.ValidationType); Assert.Empty(rule.ValidationParameters); Assert.Equal(expected, rule.ErrorMessage); }