public void ValidateBindingContextThrowsIfBindingContextIsNull()
{
// Act & assert
Assert.ThrowsArgumentNull(
() => ModelBindingHelper.ValidateBindingContext(null, typeof(string), true),
"bindingContext");
}
public void ValidateBindingContextThrowsIfModelMetadataIsNull()
{
// Arrange
ModelBindingContext bindingContext = new ModelBindingContext();
// Act & assert
Assert.Throws <ArgumentException>(
() => ModelBindingHelper.ValidateBindingContext(bindingContext, typeof(string), true),
@"The binding context cannot have a null ModelMetadata.
Parameter name: bindingContext");
}
public void ValidateBindingContextThrowsIfModelMetadataIsNull()
{
// Arrange
ModelBindingContext bindingContext = new ModelBindingContext();
// Act & assert
Assert.ThrowsArgument(
() => ModelBindingHelper.ValidateBindingContext(bindingContext, typeof(string), true),
"bindingContext",
"The binding context cannot have a null ModelMetadata.");
}
public void ValidateBindingContext_SuccessWithNullModel()
{
// Arrange
ModelBindingContext bindingContext = new ModelBindingContext
{
ModelMetadata = GetMetadata(typeof(string))
};
// Act
ModelBindingHelper.ValidateBindingContext(bindingContext, typeof(string), true);
// Assert
// Nothing to do - if we got this far without throwing, the test succeeded
}
public void ValidateBindingContextThrowsIfModelTypeIsWrong()
{
// Arrange
ModelBindingContext bindingContext = new ModelBindingContext
{
ModelMetadata = GetMetadata(typeof(object))
};
// Act & assert
Assert.Throws <ArgumentException>(
() => ModelBindingHelper.ValidateBindingContext(bindingContext, typeof(string), true),
@"The binding context has a ModelType of 'System.Object', but this binder can only operate on models of type 'System.String'.
Parameter name: bindingContext");
}
public void ValidateBindingContextThrowsIfModelIsNullButCannotBe()
{
// Arrange
ModelBindingContext bindingContext = new ModelBindingContext
{
ModelMetadata = GetMetadata(typeof(string))
};
// Act & assert
Assert.Throws <ArgumentException>(
() => ModelBindingHelper.ValidateBindingContext(bindingContext, typeof(string), false),
@"The binding context has a null Model, but this binder requires a non-null model of type 'System.String'.
Parameter name: bindingContext");
}
public void ValidateBindingContextThrowsIfModelInstanceIsWrongType()
{
// Arrange
ModelBindingContext bindingContext = new ModelBindingContext
{
ModelMetadata = GetMetadata(typeof(string))
};
bindingContext.ModelMetadata.Model = 42;
// Act & assert
Assert.ThrowsArgument(
() => ModelBindingHelper.ValidateBindingContext(bindingContext, typeof(string), allowNullModel: true),
"bindingContext",
"The binding context has a Model of type 'System.Int32', but this binder can only operate on models of type 'System.String'.");
}