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// -----------------------------------------------------------------------
// Copyright (c) Microsoft Corporation. All rights reserved.
// -----------------------------------------------------------------------
using System;
using System.Linq;
using System.ComponentModel.Composition;
using Microsoft.VisualStudio.TestTools.UnitTesting;
using System.ComponentModel.Composition.UnitTesting;
using System.ComponentModel.Composition.Factories;
using System.ComponentModel.Composition.Primitives;
namespace Tests.Integration
{
[TestClass]
public class CompositionContainerAttributedModelCycleTests
{
// There are nine possible scenarios that cause a part to have a dependency on another part, some of which
// are legal and some not. For example, below, is not legal for a part, A, to have a prerequisite dependency
// on a part, B, which has also has a prerequisite dependency on A. In contrast, however, it is legal for
// part A and B to have a non-prerequisite (Post) dependency on each other.
//
// ------------------------------
// | | B |
// | | Pre | Post | None |
// |--------|-----|------|------|
// | Pre | X | X | √ |
// | A Post | X | √ | √ |
// | None | √ | √ | √ |
// ------------------------------
//
[TestMethod]
public void APrerequisiteDependsOnBPrerequisite_ShouldThrowComposition()
{
AssertCycle(typeof(APrerequisiteDependsOnBPrerequisite),
typeof(BPrerequisiteDependsOnAPrerequisite));
}
[TestMethod]
public void APrerequisiteDependsOnBPost_ShouldThrowComposition()
{
AssertCycle(typeof(APrerequisiteDependsOnBPost),
typeof(BPostDependsOnAPrerequisite));
}
[TestMethod]
public void APrerequisiteDependsOnBNone_ShouldNotThrow()
{
AssertNotCycle(typeof(APrerequisiteDependsOnBNone),
typeof(BNone));
}
[TestMethod]
public void APostDependsOnBPrerequisite_ShouldThrowComposition()
{
AssertCycle(typeof(APostDependsOnBPrerequisite),
typeof(BPrerequisiteDependsOnAPost));
}
[TestMethod]
public void APostDependsOnBPost_ShouldNotThrow()
{
AssertNotCycle(typeof(APostDependsOnBPost),
typeof(BPostDependsOnAPost));
}
[TestMethod]
public void APostDependsOnBNone_ShouldNotThrow()
{
AssertNotCycle(typeof(APostDependsOnBNone),
typeof(BNone));
}
[TestMethod]
public void BPrerequisiteDependsOnANone_ShouldNotThrow()
{
AssertNotCycle(typeof(ANone),
typeof(BPrerequisiteDependsOnANone));
}
[TestMethod]
public void BPostDependsOnANone_ShouldNotThrow()
{
AssertNotCycle(typeof(ANone),
typeof(BPostDependsOnANone));
}
[TestMethod]
public void ANoneWithBNone_ShouldNotThrow()
{
AssertNotCycle(typeof(ANone),
typeof(BNone));
}
[TestMethod]
public void PartWithHasPrerequisteImportThatIsInAPostCycle_ShouldNotThrow()
{
AssertNotCycle(typeof(PartWithHasPrerequisteImportThatIsInAPostCycle)
, typeof(APostDependsOnBPost), typeof(BPostDependsOnAPost));
}
private static void AssertCycle(params Type[] types)
{
foreach (Type type in types)
{
var export = GetExport(type, types);
CompositionAssert.ThrowsError(ErrorId.ImportEngine_PartCannotGetExportedValue, () =>
{
var value = export.Value;
});
}
}
private static void AssertNotCycle(params Type[] types)
{
foreach (Type type in types)
{
var export = GetExport(type, types);
Assert.IsInstanceOfType(export.Value, type);
}
}
private static Lazy<object, object> GetExport(Type type, Type[] partTypes)
{
var container = ContainerFactory.CreateWithAttributedCatalog(partTypes);
return container.GetExports(type, null, null).Single();
}
[Export]
public class APrerequisiteDependsOnBPrerequisite
{
[ImportingConstructor]
public APrerequisiteDependsOnBPrerequisite(BPrerequisiteDependsOnAPrerequisite b)
{
}
}
[Export]
public class BPrerequisiteDependsOnAPrerequisite
{
[ImportingConstructor]
public BPrerequisiteDependsOnAPrerequisite(APrerequisiteDependsOnBPrerequisite a)
{
}
}
[Export]
public class APrerequisiteDependsOnBPost
{
[ImportingConstructor]
public APrerequisiteDependsOnBPost(BPostDependsOnAPrerequisite b)
{
}
}
[Export]
public class BPostDependsOnAPrerequisite
{
[Import]
public APrerequisiteDependsOnBPost A
{
get;
set;
}
}
[Export]
public class APrerequisiteDependsOnBNone
{
[ImportingConstructor]
public APrerequisiteDependsOnBNone(BNone b)
{
}
}
[Export]
public class BNone
{
}
[Export]
public class ANone
{
}
[Export]
public class APostDependsOnBPrerequisite
{
[Import]
public BPrerequisiteDependsOnAPost B
{
get;
set;
}
}
[Export]
public class BPrerequisiteDependsOnAPost
{
[ImportingConstructor]
public BPrerequisiteDependsOnAPost(APostDependsOnBPrerequisite a)
{
}
}
[Export]
public class APostDependsOnBPost
{
[Import]
public BPostDependsOnAPost B
{
get;
set;
}
}
[Export]
public class BPostDependsOnAPost
{
[Import]
public APostDependsOnBPost A
{
get;
set;
}
}
[Export]
public class APostDependsOnBNone
{
[Import]
public BNone B
{
get;
set;
}
}
[Export]
public class BPrerequisiteDependsOnANone
{
[ImportingConstructor]
public BPrerequisiteDependsOnANone(ANone a)
{
}
}
[Export]
public class BPostDependsOnANone
{
[Import]
public ANone A
{
get;
set;
}
}
[Export]
public class PartWithHasPrerequisteImportThatIsInAPostCycle
{
[ImportingConstructor]
public PartWithHasPrerequisteImportThatIsInAPostCycle(APostDependsOnBPost a)
{
}
}
}
}
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