public void ModelStateDictionary_ReturnGenericErrorMessage_WhenModelStateNotSet()
{
// Arrange
var expected = "The supplied value is invalid for Length.";
var dictionary = new ModelStateDictionary();
var provider = new EmptyModelMetadataProvider();
var metadata = provider.GetMetadataForProperty(typeof(string), nameof(string.Length));
// Act
dictionary.TryAddModelError("key", new FormatException(), metadata);
// Assert
var error = Assert.Single(dictionary["key"].Errors);
Assert.Equal(expected, error.ErrorMessage);
}
public void ModelStateDictionary_NoErrorMessage_ForNonFormatException()
{
// Arrange
var dictionary = new ModelStateDictionary();
dictionary.SetModelValue("key", new string[] { "some value" }, "some value");
var provider = new EmptyModelMetadataProvider();
var metadata = provider.GetMetadataForProperty(typeof(string), nameof(string.Length));
// Act
dictionary.TryAddModelError("key", new InvalidOperationException(), metadata);
// Assert
var error = Assert.Single(dictionary["key"].Errors);
Assert.Empty(error.ErrorMessage);
}
public void ModelStateDictionary_ReturnSpecificErrorMessage_WhenModelStateSet()
{
// Arrange
var expected = "The value 'some value' is not valid for Length.";
var dictionary = new ModelStateDictionary();
dictionary.SetModelValue("key", new string[] { "some value" }, "some value");
var provider = new EmptyModelMetadataProvider();
var metadata = provider.GetMetadataForProperty(typeof(string), nameof(string.Length));
// Act
dictionary.TryAddModelError("key", new FormatException(), metadata);
// Assert
var error = Assert.Single(dictionary["key"].Errors);
Assert.Equal(expected, error.ErrorMessage);
}
public void TryAddModelError_WithErrorString_ReturnsFalse_AndAddsMaxModelErrorMessage()
{
// Arrange
var expected = "The maximum number of allowed model errors has been reached.";
var dictionary = new ModelStateDictionary
{
MaxAllowedErrors = 3
};
var provider = new EmptyModelMetadataProvider();
var metadata = provider.GetMetadataForProperty(typeof(string), nameof(string.Length));
// Act and Assert
Assert.False(dictionary.HasReachedMaxErrors);
var result = dictionary.TryAddModelError("key1", "error1");
Assert.True(result);
Assert.False(dictionary.HasReachedMaxErrors);
result = dictionary.TryAddModelError("key2", new Exception(), metadata);
Assert.True(result);
Assert.False(dictionary.HasReachedMaxErrors); // Still room for TooManyModelErrorsException.
result = dictionary.TryAddModelError("key3", "error3");
Assert.False(result);
Assert.True(dictionary.HasReachedMaxErrors);
result = dictionary.TryAddModelError("key4", "error4"); // no-op
Assert.False(result);
Assert.True(dictionary.HasReachedMaxErrors);
Assert.Equal(3, dictionary.ErrorCount);
Assert.Equal(3, dictionary.Count);
var error = Assert.Single(dictionary[string.Empty].Errors);
Assert.IsType <TooManyModelErrorsException>(error.Exception);
Assert.Equal(expected, error.Exception.Message);
// TooManyModelErrorsException added instead of key3 error.
Assert.DoesNotContain("key3", dictionary.Keys);
// Last addition did nothing.
Assert.DoesNotContain("key4", dictionary.Keys);
}
public void AddModelErrorUsesExistingModelStateIfPresent()
{
// Arrange
var dictionary = new ModelStateDictionary();
dictionary.AddModelError("some key", "some error");
var exception = new Exception();
var provider = new EmptyModelMetadataProvider();
var metadata = provider.GetMetadataForProperty(typeof(string), nameof(string.Length));
// Act
dictionary.AddModelError("some key", exception, metadata);
// Assert
Assert.Equal(2, dictionary.ErrorCount);
var kvp = Assert.Single(dictionary);
Assert.Equal("some key", kvp.Key);
Assert.Equal(2, kvp.Value.Errors.Count);
Assert.Equal("some error", kvp.Value.Errors[0].ErrorMessage);
Assert.Same(exception, kvp.Value.Errors[1].Exception);
}
public void ModelStateConstructorWithDetail_AddsCorrectDictionaryItems()
{
// Arrange
ModelStateDictionary modelState = new ModelStateDictionary();
var provider = new EmptyModelMetadataProvider();
var metadata = provider.GetMetadataForProperty(typeof(string), nameof(string.Length));
modelState.AddModelError("[0].Name", "error1");
modelState.AddModelError("[0].Name", "error2");
modelState.AddModelError("[0].Address", "error");
modelState.AddModelError("[2].Name", new Exception("OH NO"), metadata);
// Act
HttpError error = new HttpError(modelState, true);
// Assert
HttpError modelStateError = error["ModelState"] as HttpError;
Assert.Contains(new KeyValuePair<string, object>("Message", "The request is invalid."), error);
Assert.Contains("error1", modelStateError["[0].Name"] as IEnumerable<string>);
Assert.Contains("error2", modelStateError["[0].Name"] as IEnumerable<string>);
Assert.Contains("error", modelStateError["[0].Address"] as IEnumerable<string>);
Assert.True(modelStateError.ContainsKey("[2].Name"));
Assert.Contains("OH NO", modelStateError["[2].Name"] as IEnumerable<string>);
}
public void ModelStateDictionary_ReturnSpecificErrorMessage_WhenModelStateSet()
{
// Arrange
var expected = "The value 'some value' is not valid for Length.";
var dictionary = new ModelStateDictionary();
dictionary.SetModelValue("key", new string[] { "some value" }, "some value");
var provider = new EmptyModelMetadataProvider();
var metadata = provider.GetMetadataForProperty(typeof(string), nameof(string.Length));
// Act
dictionary.TryAddModelError("key", new FormatException(), metadata);
// Assert
var error = Assert.Single(dictionary["key"].Errors);
Assert.Equal(expected, error.ErrorMessage);
}
public void ModelStateDictionary_ReturnGenericErrorMessage_WhenModelStateNotSet()
{
// Arrange
var expected = "The supplied value is invalid for Length.";
var dictionary = new ModelStateDictionary();
var provider = new EmptyModelMetadataProvider();
var metadata = provider.GetMetadataForProperty(typeof(string), nameof(string.Length));
// Act
dictionary.TryAddModelError("key", new FormatException(), metadata);
// Assert
var error = Assert.Single(dictionary["key"].Errors);
Assert.Equal(expected, error.ErrorMessage);
}
public void ModelStateDictionary_TracksAddedErrorsOverCopyConstructor()
{
// Arrange
var expected = "The maximum number of allowed model errors has been reached.";
var dictionary = new ModelStateDictionary
{
MaxAllowedErrors = 3
};
var provider = new EmptyModelMetadataProvider();
var metadata = provider.GetMetadataForProperty(typeof(string), nameof(string.Length));
// Act
dictionary.AddModelError("key1", "error1");
dictionary.TryAddModelError("key3", new Exception(), metadata);
var copy = new ModelStateDictionary(dictionary);
copy.AddModelError("key2", "error2");
// Assert
Assert.Equal(3, copy.Count);
var error = Assert.Single(copy[string.Empty].Errors);
Assert.IsType<TooManyModelErrorsException>(error.Exception);
Assert.Equal(expected, error.Exception.Message);
}
public void TryAddModelError_WithException_ReturnsFalse_AndAddsMaxModelErrorMessage()
{
// Arrange
var expected = "The maximum number of allowed model errors has been reached.";
var dictionary = new ModelStateDictionary
{
MaxAllowedErrors = 3
};
var provider = new EmptyModelMetadataProvider();
var metadata = provider.GetMetadataForProperty(typeof(string), nameof(string.Length));
// Act and Assert
var result = dictionary.TryAddModelError("key1", "error1");
Assert.True(result);
result = dictionary.TryAddModelError("key2", new Exception(), metadata);
Assert.True(result);
result = dictionary.TryAddModelError("key3", new Exception(), metadata);
Assert.False(result);
Assert.Equal(3, dictionary.Count);
var error = Assert.Single(dictionary[string.Empty].Errors);
Assert.IsType<TooManyModelErrorsException>(error.Exception);
Assert.Equal(expected, error.Exception.Message);
}
public void AddModelError_WithException_AddsTooManyModelError_WhenMaxErrorIsReached()
{
// Arrange
var expected = "The maximum number of allowed model errors has been reached.";
var dictionary = new ModelStateDictionary
{
MaxAllowedErrors = 4
};
var provider = new EmptyModelMetadataProvider();
var metadata = provider.GetMetadataForProperty(typeof(string), nameof(string.Length));
dictionary.AddModelError("key1", new Exception(), metadata);
dictionary.AddModelError("key2", "error2");
dictionary.AddModelError("key3", "error3");
dictionary.AddModelError("key3", new Exception(), metadata);
// Act and Assert
Assert.True(dictionary.HasReachedMaxErrors);
Assert.Equal(4, dictionary.ErrorCount);
Assert.Equal(4, dictionary.Count);
var error = Assert.Single(dictionary[string.Empty].Errors);
Assert.IsType<TooManyModelErrorsException>(error.Exception);
Assert.Equal(expected, error.Exception.Message);
// Second key3 model error resulted in TooManyModelErrorsException instead.
error = Assert.Single(dictionary["key3"].Errors);
Assert.Null(error.Exception);
Assert.Equal("error3", error.ErrorMessage);
}
public void Validate_SkipsRemainingValidationIfModelStateIsInvalid()
{
// Because a property validator fails, the model validator shouldn't run
// Arrange
var expected = new[]
{
"In OnValidating()",
"In IValidatableObject.Validate()",
"In OnValidated()"
};
var log = new List<string>();
var model = new LoggingValidatableObject(log);
var modelMetadata = GetModelMetadata(model);
var provider = new EmptyModelMetadataProvider();
var childMetadata = provider.GetMetadataForProperty(() => model,
model.GetType(),
"InvalidStringProperty");
var node = new ModelValidationNode(modelMetadata, "theKey");
node.ChildNodes.Add(new ModelValidationNode(childMetadata, "theKey.InvalidStringProperty"));
node.Validating += (sender, e) => log.Add("In OnValidating()");
node.Validated += (sender, e) => log.Add("In OnValidated()");
var context = CreateContext(modelMetadata);
// Act
node.Validate(context);
// Assert
Assert.Equal(expected, log);
Assert.Equal("Sample error message",
context.ModelState["theKey.InvalidStringProperty"].Errors[0].ErrorMessage);
}
// Adds one or more errors for all properties in OrderedModel. But adds errors out of order.
private void AddOrderedErrors(ModelStateDictionary modelState)
{
var provider = new EmptyModelMetadataProvider();
var metadata = provider.GetMetadataForProperty(typeof(OrderedModel), nameof(OrderedModel.Property3));
modelState.AddModelError("Property3", "This is an error for Property3.");
modelState.AddModelError("Property3", new InvalidCastException("An ignored Exception."), metadata);
modelState.AddModelError("Property2", "This is an error for Property2.");
modelState.AddModelError("Property2", "This is another error for Property2.");
modelState.AddModelError("OrderedProperty3", "This is an error for OrderedProperty3.");
modelState.AddModelError("OrderedProperty2", "This is an error for OrderedProperty2.");
modelState.AddModelError("OrderedProperty2", "This is another error for OrderedProperty2.");
modelState.AddModelError("LastProperty", "This is an error for LastProperty.");
modelState.AddModelError("Property1", "This is an error for Property1.");
modelState.AddModelError("Property1", "This is another error for Property1.");
modelState.AddModelError("OrderedProperty1", "This is an error for OrderedProperty1.");
modelState.AddModelError("OrderedProperty2", "This is yet-another error for OrderedProperty2.");
}
public void AddModelErrorUsesExistingModelStateIfPresent()
{
// Arrange
var dictionary = new ModelStateDictionary();
dictionary.AddModelError("some key", "some error");
var exception = new Exception();
var provider = new EmptyModelMetadataProvider();
var metadata = provider.GetMetadataForProperty(typeof(string), nameof(string.Length));
// Act
dictionary.AddModelError("some key", exception, metadata);
// Assert
Assert.Equal(2, dictionary.ErrorCount);
var kvp = Assert.Single(dictionary);
Assert.Equal("some key", kvp.Key);
Assert.Equal(2, kvp.Value.Errors.Count);
Assert.Equal("some error", kvp.Value.Errors[0].ErrorMessage);
Assert.Same(exception, kvp.Value.Errors[1].Exception);
}
public void ModelStateDictionary_NoErrorMessage_ForNonFormatException()
{
// Arrange
var dictionary = new ModelStateDictionary();
dictionary.SetModelValue("key", new string[] { "some value" }, "some value");
var provider = new EmptyModelMetadataProvider();
var metadata = provider.GetMetadataForProperty(typeof(string), nameof(string.Length));
// Act
dictionary.TryAddModelError("key", new InvalidOperationException(), metadata);
// Assert
var error = Assert.Single(dictionary["key"].Errors);
Assert.Empty(error.ErrorMessage);
}
// Adds errors for various parts of the model, including the root.
private void AddMultipleErrors(ModelStateDictionary modelState)
{
modelState.AddModelError("Property3.Property2", "This is an error for Property3.Property2.");
modelState.AddModelError("Property3.OrderedProperty3", "This is an error for Property3.OrderedProperty3.");
modelState.AddModelError("Property3.OrderedProperty2", "This is an error for Property3.OrderedProperty2.");
var provider = new EmptyModelMetadataProvider();
var metadata = provider.GetMetadataForProperty(typeof(ValidationModel), nameof(ValidationModel.Property3));
modelState.AddModelError("Property3", "This is an error for Property3.");
modelState.AddModelError("Property3", new InvalidCastException("Exception will be ignored."), metadata);
metadata = provider.GetMetadataForProperty(typeof(ValidationModel), nameof(ValidationModel.Property2));
modelState.AddModelError("Property2", "This is an error for Property2.");
modelState.AddModelError("Property2", "This is another error for Property2.");
modelState.AddModelError("Property2", new OverflowException("Produces invalid value message"), metadata);
metadata = provider.GetMetadataForType(typeof(ValidationModel));
modelState.AddModelError(string.Empty, "This is an error for the model root.");
modelState.AddModelError(string.Empty, "This is another error for the model root.");
modelState.AddModelError(string.Empty, new InvalidOperationException("Another ignored Exception."), metadata);
}
public void AddModelError_WithErrorString_AddsTooManyModelErrors_WhenMaxErrorsIsReached()
{
// Arrange
var expected = "The maximum number of allowed model errors has been reached.";
var dictionary = new ModelStateDictionary
{
MaxAllowedErrors = 5
};
var provider = new EmptyModelMetadataProvider();
var metadata = provider.GetMetadataForProperty(typeof(string), nameof(string.Length));
dictionary.AddModelError("key1", "error1");
dictionary.AddModelError("key2", new Exception(), metadata);
dictionary.AddModelError("key3", new Exception(), metadata);
dictionary.AddModelError("key4", "error4");
dictionary.AddModelError("key5", "error5");
// Act and Assert
Assert.True(dictionary.HasReachedMaxErrors);
Assert.Equal(5, dictionary.ErrorCount);
var error = Assert.Single(dictionary[string.Empty].Errors);
Assert.IsType<TooManyModelErrorsException>(error.Exception);
Assert.Equal(expected, error.Exception.Message);
// TooManyModelErrorsException added instead of key5 error.
Assert.DoesNotContain("key5", dictionary.Keys);
}
public void TryAddModelError_WithErrorString_ReturnsFalse_AndAddsMaxModelErrorMessage()
{
// Arrange
var expected = "The maximum number of allowed model errors has been reached.";
var dictionary = new ModelStateDictionary
{
MaxAllowedErrors = 3
};
var provider = new EmptyModelMetadataProvider();
var metadata = provider.GetMetadataForProperty(typeof(string), nameof(string.Length));
// Act and Assert
Assert.False(dictionary.HasReachedMaxErrors);
var result = dictionary.TryAddModelError("key1", "error1");
Assert.True(result);
Assert.False(dictionary.HasReachedMaxErrors);
result = dictionary.TryAddModelError("key2", new Exception(), metadata);
Assert.True(result);
Assert.False(dictionary.HasReachedMaxErrors); // Still room for TooManyModelErrorsException.
result = dictionary.TryAddModelError("key3", "error3");
Assert.False(result);
Assert.True(dictionary.HasReachedMaxErrors);
result = dictionary.TryAddModelError("key4", "error4"); // no-op
Assert.False(result);
Assert.True(dictionary.HasReachedMaxErrors);
Assert.Equal(3, dictionary.ErrorCount);
Assert.Equal(3, dictionary.Count);
var error = Assert.Single(dictionary[string.Empty].Errors);
Assert.IsType<TooManyModelErrorsException>(error.Exception);
Assert.Equal(expected, error.Exception.Message);
// TooManyModelErrorsException added instead of key3 error.
Assert.DoesNotContain("key3", dictionary.Keys);
// Last addition did nothing.
Assert.DoesNotContain("key4", dictionary.Keys);
}
public void Validate_Ordering()
{
// Proper order of invocation:
// 1. OnValidating()
// 2. Child validators
// 3. This validator
// 4. OnValidated()
// Arrange
var expected = new[]
{
"In OnValidating()",
"In LoggingValidatonAttribute.IsValid()",
"In IValidatableObject.Validate()",
"In OnValidated()"
};
var log = new List<string>();
var model = new LoggingValidatableObject(log);
var modelMetadata = GetModelMetadata(model);
var provider = new EmptyModelMetadataProvider();
var childMetadata = provider.GetMetadataForProperty(() => model, model.GetType(), "ValidStringProperty");
var node = new ModelValidationNode(modelMetadata, "theKey");
node.Validating += (sender, e) => log.Add("In OnValidating()");
node.Validated += (sender, e) => log.Add("In OnValidated()");
node.ChildNodes.Add(new ModelValidationNode(childMetadata, "theKey.ValidStringProperty"));
var context = CreateContext(modelMetadata);
// Act
node.Validate(context);
// Assert
Assert.Equal(expected, log);
}