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// Copyright (c) Microsoft Corporation. All rights reserved. See License.txt in the project root for license information.
using System.Web.TestUtil;
using Microsoft.Web.UnitTestUtil;
using Xunit;
using Assert = Microsoft.TestCommon.AssertEx;
namespace System.Web.Mvc.Test
{
public class ModelBindingContextTest
{
[Fact]
public void CopyConstructor()
{
// Arrange
ModelBindingContext originalBindingContext = new ModelBindingContext()
{
FallbackToEmptyPrefix = true,
ModelMetadata = new EmptyModelMetadataProvider().GetMetadataForType(null, typeof(object)),
ModelName = "theName",
ModelState = new ModelStateDictionary(),
PropertyFilter = _ => false,
ValueProvider = new SimpleValueProvider()
};
// Act
ModelBindingContext newBindingContext = new ModelBindingContext(originalBindingContext);
// Assert
Assert.False(newBindingContext.FallbackToEmptyPrefix);
Assert.Null(newBindingContext.ModelMetadata);
Assert.Equal("", newBindingContext.ModelName);
Assert.Equal(originalBindingContext.ModelState, newBindingContext.ModelState);
Assert.True(newBindingContext.PropertyFilter("foo"));
Assert.Equal(originalBindingContext.ValueProvider, newBindingContext.ValueProvider);
}
[Fact]
public void ModelNameProperty()
{
// Arrange
ModelBindingContext bindingContext = new ModelBindingContext();
// Act & assert
MemberHelper.TestStringProperty(bindingContext, "ModelName", String.Empty);
}
[Fact]
public void ModelStateProperty()
{
// Arrange
ModelBindingContext bindingContext = new ModelBindingContext();
ModelStateDictionary modelState = new ModelStateDictionary();
// Act & assert
MemberHelper.TestPropertyWithDefaultInstance(bindingContext, "ModelState", modelState);
}
[Fact]
public void PropertyFilterPropertyDefaultInstanceReturnsTrueForAnyInput()
{
// Arrange
ModelBindingContext bindingContext = new ModelBindingContext();
// Act
Predicate<string> propertyFilter = bindingContext.PropertyFilter;
// Assert
// We can't test all inputs, but at least this gives us high confidence that we ignore the parameter by default
Assert.True(propertyFilter(null));
Assert.True(propertyFilter(String.Empty));
Assert.True(propertyFilter("Foo"));
}
[Fact]
public void PropertyFilterPropertyReturnsDefaultInstance()
{
// Arrange
ModelBindingContext bindingContext = new ModelBindingContext();
Predicate<string> propertyFilter = _ => true;
// Act & assert
MemberHelper.TestPropertyWithDefaultInstance(bindingContext, "PropertyFilter", propertyFilter);
}
[Fact]
public void ModelAndModelTypeAreFedFromModelMetadata()
{
// Act
ModelBindingContext bindingContext = new ModelBindingContext
{
ModelMetadata = ModelMetadataProviders.Current.GetMetadataForType(() => 42, typeof(int))
};
// Assert
Assert.Equal(42, bindingContext.Model);
Assert.Equal(typeof(int), bindingContext.ModelType);
}
[Fact]
public void ModelIsNotSettable()
{
// Arrange
ModelBindingContext bindingContext = new ModelBindingContext();
// Act & Assert
Assert.Throws<InvalidOperationException>(
() => bindingContext.Model = "foo",
"This property setter is obsolete, because its value is derived from ModelMetadata.Model now.");
}
[Fact]
public void ModelTypeIsNotSettable()
{
// Arrange
ModelBindingContext bindingContext = new ModelBindingContext();
// Act & Assert
Assert.Throws<InvalidOperationException>(
() => bindingContext.ModelType = typeof(string),
"This property setter is obsolete, because its value is derived from ModelMetadata.Model now.");
}
}
}
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