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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.Collections.ObjectModel;
using System.Linq;
using Xunit;
namespace Microsoft.Web.Mvc.Test
{
public class ModelCopierTest
{
[Fact]
public void CopyCollection_FromIsNull_DoesNothing()
{
// Arrange
int[] from = null;
List<int> to = new List<int> { 1, 2, 3 };
// Act
ModelCopier.CopyCollection(from, to);
// Assert
Assert.Equal(new[] { 1, 2, 3 }, to.ToArray());
}
[Fact]
public void CopyCollection_ToIsImmutable_DoesNothing()
{
// Arrange
List<int> from = new List<int> { 1, 2, 3 };
ICollection<int> to = new ReadOnlyCollection<int>(new[] { 4, 5, 6 });
// Act
ModelCopier.CopyCollection(from, to);
// Assert
Assert.Equal(new[] { 1, 2, 3 }, from.ToArray());
Assert.Equal(new[] { 4, 5, 6 }, to.ToArray());
}
[Fact]
public void CopyCollection_ToIsMmutable_ClearsAndCopies()
{
// Arrange
List<int> from = new List<int> { 1, 2, 3 };
ICollection<int> to = new List<int> { 4, 5, 6 };
// Act
ModelCopier.CopyCollection(from, to);
// Assert
Assert.Equal(new[] { 1, 2, 3 }, from.ToArray());
Assert.Equal(new[] { 1, 2, 3 }, to.ToArray());
}
[Fact]
public void CopyCollection_ToIsNull_DoesNothing()
{
// Arrange
List<int> from = new List<int> { 1, 2, 3 };
List<int> to = null;
// Act
ModelCopier.CopyCollection(from, to);
// Assert
Assert.Equal(new[] { 1, 2, 3 }, from.ToArray());
}
[Fact]
public void CopyModel_ExactTypeMatch_Copies()
{
// Arrange
GenericModel<int> from = new GenericModel<int> { TheProperty = 21 };
GenericModel<int> to = new GenericModel<int> { TheProperty = 42 };
// Act
ModelCopier.CopyModel(from, to);
// Assert
Assert.Equal(21, from.TheProperty);
Assert.Equal(21, to.TheProperty);
}
[Fact]
public void CopyModel_FromIsNull_DoesNothing()
{
// Arrange
GenericModel<int> from = null;
GenericModel<int> to = new GenericModel<int> { TheProperty = 42 };
// Act
ModelCopier.CopyModel(from, to);
// Assert
Assert.Equal(42, to.TheProperty);
}
[Fact]
public void CopyModel_LiftedTypeMatch_ActualValueIsNotNull_Copies()
{
// Arrange
GenericModel<int?> from = new GenericModel<int?> { TheProperty = 21 };
GenericModel<int> to = new GenericModel<int> { TheProperty = 42 };
// Act
ModelCopier.CopyModel(from, to);
// Assert
Assert.Equal(21, from.TheProperty);
Assert.Equal(21, to.TheProperty);
}
[Fact]
public void CopyModel_LiftedTypeMatch_ActualValueIsNull_DoesNothing()
{
// Arrange
GenericModel<int?> from = new GenericModel<int?> { TheProperty = null };
GenericModel<int> to = new GenericModel<int> { TheProperty = 42 };
// Act
ModelCopier.CopyModel(from, to);
// Assert
Assert.Null(from.TheProperty);
Assert.Equal(42, to.TheProperty);
}
[Fact]
public void CopyModel_NoTypeMatch_DoesNothing()
{
// Arrange
GenericModel<int> from = new GenericModel<int> { TheProperty = 21 };
GenericModel<long> to = new GenericModel<long> { TheProperty = 42 };
// Act
ModelCopier.CopyModel(from, to);
// Assert
Assert.Equal(21, from.TheProperty);
Assert.Equal(42, to.TheProperty);
}
[Fact]
public void CopyModel_SubclassedTypeMatch_Copies()
{
// Arrange
string originalModel = "Hello, world!";
GenericModel<string> from = new GenericModel<string> { TheProperty = originalModel };
GenericModel<object> to = new GenericModel<object> { TheProperty = 42 };
// Act
ModelCopier.CopyModel(from, to);
// Assert
Assert.Same(originalModel, from.TheProperty);
Assert.Same(originalModel, to.TheProperty);
}
[Fact]
public void CopyModel_ToDoesNotContainProperty_DoesNothing()
{
// Arrange
GenericModel<int> from = new GenericModel<int> { TheProperty = 21 };
OtherGenericModel<int> to = new OtherGenericModel<int> { SomeOtherProperty = 42 };
// Act
ModelCopier.CopyModel(from, to);
// Assert
Assert.Equal(21, from.TheProperty);
Assert.Equal(42, to.SomeOtherProperty);
}
[Fact]
public void CopyModel_ToIsNull_DoesNothing()
{
// Arrange
GenericModel<int> from = new GenericModel<int> { TheProperty = 21 };
GenericModel<int> to = null;
// Act
ModelCopier.CopyModel(from, to);
// Assert
Assert.Equal(21, from.TheProperty);
}
[Fact]
public void CopyModel_ToIsReadOnly_DoesNothing()
{
// Arrange
GenericModel<int> from = new GenericModel<int> { TheProperty = 21 };
ReadOnlyGenericModel<int> to = new ReadOnlyGenericModel<int>(42);
// Act
ModelCopier.CopyModel(from, to);
// Assert
Assert.Equal(21, from.TheProperty);
Assert.Equal(42, to.TheProperty);
}
private class GenericModel<T>
{
public T TheProperty { get; set; }
}
private class OtherGenericModel<T>
{
public T SomeOtherProperty { get; set; }
}
private class ReadOnlyGenericModel<T>
{
public ReadOnlyGenericModel(T propertyValue)
{
TheProperty = propertyValue;
}
public T TheProperty { get; private set; }
}
}
}
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