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// Copyright (c) Microsoft Corporation. All rights reserved. See License.txt in the project root for license information.
using System.Collections.Generic;
using System.Linq;
using System.Web.Http.Metadata.Providers;
using Moq;
using Xunit;
using Assert = Microsoft.TestCommon.AssertEx;
namespace System.Web.Http.Metadata
{
public class ModelMetadataTest
{
// Guard clauses
[Fact]
public void NullProviderThrows()
{
// Act & Assert
Assert.ThrowsArgumentNull(
() => new ModelMetadata(null /* provider */, null /* containerType */, null /* model */, typeof(object), null /* propertyName */),
"provider");
}
[Fact]
public void NullTypeThrows()
{
// Arrange
Mock<ModelMetadataProvider> provider = new Mock<ModelMetadataProvider>();
// Act & Assert
Assert.ThrowsArgumentNull(
() => new ModelMetadata(provider.Object, null /* containerType */, null /* model */, null /* modelType */, null /* propertyName */),
"modelType");
}
// Constructor
[Fact]
public void DefaultValues()
{
// Arrange
Mock<ModelMetadataProvider> provider = new Mock<ModelMetadataProvider>();
// Act
ModelMetadata metadata = new ModelMetadata(provider.Object, typeof(Exception), () => "model", typeof(string), "propertyName");
// Assert
Assert.Equal(typeof(Exception), metadata.ContainerType);
Assert.True(metadata.ConvertEmptyStringToNull);
Assert.Null(metadata.Description);
Assert.Equal("model", metadata.Model);
Assert.Equal(typeof(string), metadata.ModelType);
Assert.Equal("propertyName", metadata.PropertyName);
Assert.False(metadata.IsReadOnly);
}
// IsComplexType
struct IsComplexTypeModel
{
}
[Fact]
public void IsComplexTypeTests()
{
// Arrange
Mock<ModelMetadataProvider> provider = new Mock<ModelMetadataProvider>();
// Act & Assert
Assert.True(new ModelMetadata(provider.Object, null, null, typeof(Object), null).IsComplexType);
Assert.False(new ModelMetadata(provider.Object, null, null, typeof(string), null).IsComplexType);
Assert.True(new ModelMetadata(provider.Object, null, null, typeof(IDisposable), null).IsComplexType);
Assert.False(new ModelMetadata(provider.Object, null, null, typeof(Nullable<int>), null).IsComplexType);
Assert.False(new ModelMetadata(provider.Object, null, null, typeof(int), null).IsComplexType);
Assert.True(new ModelMetadata(provider.Object, null, null, typeof(IsComplexTypeModel), null).IsComplexType);
Assert.True(new ModelMetadata(provider.Object, null, null, typeof(Nullable<IsComplexTypeModel>), null).IsComplexType);
}
// IsNullableValueType
[Fact]
public void IsNullableValueTypeTests()
{
// Arrange
Mock<ModelMetadataProvider> provider = new Mock<ModelMetadataProvider>();
// Act & Assert
Assert.False(new ModelMetadata(provider.Object, null, null, typeof(string), null).IsNullableValueType);
Assert.False(new ModelMetadata(provider.Object, null, null, typeof(IDisposable), null).IsNullableValueType);
Assert.True(new ModelMetadata(provider.Object, null, null, typeof(Nullable<int>), null).IsNullableValueType);
Assert.False(new ModelMetadata(provider.Object, null, null, typeof(int), null).IsNullableValueType);
}
// Properties
[Fact]
public void PropertiesCallsProvider()
{
// Arrange
Type modelType = typeof(string);
List<ModelMetadata> propertyMetadata = new List<ModelMetadata>();
Mock<ModelMetadataProvider> provider = new Mock<ModelMetadataProvider>();
ModelMetadata metadata = new ModelMetadata(provider.Object, null, null, modelType, null);
provider.Setup(p => p.GetMetadataForProperties(null, modelType))
.Returns(propertyMetadata)
.Verifiable();
// Act
IEnumerable<ModelMetadata> result = metadata.Properties;
// Assert
Assert.Equal(propertyMetadata, result.ToList());
provider.Verify();
}
[Fact]
public void PropertiesListGetsResetWhenModelGetsReset()
{ // Dev10 Bug #923263
// Arrange
var provider = new DataAnnotationsModelMetadataProvider();
var metadata = new ModelMetadata(provider, null, () => new Class1(), typeof(Class1), null);
// Act
ModelMetadata[] originalProps = metadata.Properties.ToArray();
metadata.Model = new Class2();
ModelMetadata[] newProps = metadata.Properties.ToArray();
// Assert
ModelMetadata originalProp = Assert.Single(originalProps);
Assert.Equal(typeof(string), originalProp.ModelType);
Assert.Equal("Prop1", originalProp.PropertyName);
ModelMetadata newProp = Assert.Single(newProps);
Assert.Equal(typeof(int), newProp.ModelType);
Assert.Equal("Prop2", newProp.PropertyName);
}
class Class1
{
public string Prop1 { get; set; }
}
class Class2
{
public int Prop2 { get; set; }
}
// GetDisplayName()
[Fact]
public void ReturnsPropertyNameWhenSetAndDisplayNameIsNull()
{
// Arrange
Mock<ModelMetadataProvider> provider = new Mock<ModelMetadataProvider>();
ModelMetadata metadata = new ModelMetadata(provider.Object, null, null, typeof(object), "PropertyName");
// Act
string result = metadata.GetDisplayName();
// Assert
Assert.Equal("PropertyName", result);
}
[Fact]
public void ReturnsTypeNameWhenPropertyNameAndDisplayNameAreNull()
{
// Arrange
Mock<ModelMetadataProvider> provider = new Mock<ModelMetadataProvider>();
ModelMetadata metadata = new ModelMetadata(provider.Object, null, null, typeof(object), null);
// Act
string result = metadata.GetDisplayName();
// Assert
Assert.Equal("Object", result);
}
// Helpers
private class DummyContactModel
{
public int IntField = 0;
public string FirstName { get; set; }
public string LastName { get; set; }
public Nullable<int> NullableIntValue { get; set; }
public int[] Array { get; set; }
public string this[int index]
{
get { return "Indexed into " + index; }
}
}
private class DummyModelContainer
{
public DummyContactModel Model { get; set; }
}
}
}
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