public void UpdateCollectionReturnsModifiedCollectionOnSuccess() {
// Arrange
ControllerContext controllerContext = new Mock<ControllerContext>().Object;
List<int> model = new List<int>() { 4, 5, 6, 7, 8 };
ModelBindingContext bindingContext = new ModelBindingContext() {
Model = model,
ModelName = "foo",
PropertyFilter = _ => false,
ValueProvider = new Dictionary<string, ValueProviderResult>() { { "foo[0]", null }, { "foo[1]", null }, { "foo[2]", null } }
};
Mock<IModelBinder> mockInnerBinder = new Mock<IModelBinder>();
mockInnerBinder
.Expect(b => b.BindModel(It.IsAny<ControllerContext>(), It.IsAny<ModelBindingContext>()))
.Returns(
delegate(ControllerContext cc, ModelBindingContext bc) {
Assert.AreEqual(controllerContext, cc, "ControllerContext was not forwarded correctly.");
Assert.AreEqual(typeof(int), bc.ModelType, "ModelType was not forwarded correctly.");
Assert.AreEqual(bindingContext.ModelState, bc.ModelState, "ModelState was not forwarded correctly.");
Assert.AreEqual(bindingContext.PropertyFilter, bc.PropertyFilter, "PropertyFilter was not forwarded correctly.");
Assert.AreEqual(bindingContext.ValueProvider, bc.ValueProvider, "ValueProvider was not forwarded correctly.");
return Int32.Parse(bc.ModelName.Substring(4, 1), CultureInfo.InvariantCulture);
});
DefaultModelBinder binder = new DefaultModelBinder() {
Binders = new ModelBinderDictionary() {
{ typeof(int), mockInnerBinder.Object }
}
};
// Act
object updatedModel = binder.UpdateCollection(controllerContext, bindingContext, typeof(int));
// Assert
Assert.AreSame(model, updatedModel, "Should have updated the provided model object.");
Assert.AreEqual(3, model.Count, "Model is not of correct length.");
Assert.AreEqual(0, model[0]);
Assert.AreEqual(1, model[1]);
Assert.AreEqual(2, model[2]);
}
public void UpdateCollectionReturnsNullIfZeroIndexNotFound() {
// Arrange
ModelBindingContext bindingContext = new ModelBindingContext() {
ValueProvider = new Dictionary<string, ValueProviderResult>()
};
DefaultModelBinder binder = new DefaultModelBinder();
// Act
object updatedModel = binder.UpdateCollection(null, bindingContext, typeof(object));
// Assert
Assert.IsNull(updatedModel, "Method should return null if no values exist as part of the request.");
}
public void UpdateCollectionCreatesDefaultEntriesForInvalidElements() {
// Arrange
List<int> model = new List<int>() { 4, 5, 6, 7, 8 };
ModelBindingContext bindingContext = new ModelBindingContext() {
Model = model,
ModelName = "foo",
ValueProvider = new Dictionary<string, ValueProviderResult>() { { "foo[0]", null }, { "foo[1]", null }, { "foo[2]", null } }
};
Mock<IModelBinder> mockInnerBinder = new Mock<IModelBinder>();
mockInnerBinder
.Expect(b => b.BindModel(It.IsAny<ControllerContext>(), It.IsAny<ModelBindingContext>()))
.Returns(
delegate(ControllerContext cc, ModelBindingContext bc) {
int fooIdx = Int32.Parse(bc.ModelName.Substring(4, 1), CultureInfo.InvariantCulture);
return (fooIdx == 1) ? (object)null : fooIdx;
});
DefaultModelBinder binder = new DefaultModelBinder() {
Binders = new ModelBinderDictionary() {
{ typeof(int), mockInnerBinder.Object }
}
};
// Act
object updatedModel = binder.UpdateCollection(null, bindingContext, typeof(int));
// Assert
Assert.AreEqual(3, model.Count, "Model is not of correct length.");
Assert.AreEqual(false, bindingContext.ModelState.IsValidField("foo[1]"), "Conversion should have failed.");
Assert.AreEqual("A value is required.", bindingContext.ModelState["foo[1]"].Errors[0].ErrorMessage, "Error message did not propagate correctly.");
Assert.AreEqual(0, model[0]);
Assert.AreEqual(0, model[1]);
Assert.AreEqual(2, model[2]);
}
