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// -----------------------------------------------------------------------
// Copyright (c) Microsoft Corporation. All rights reserved.
// -----------------------------------------------------------------------
using System;
using System.UnitTesting;
using System.ComponentModel.Composition;
using System.ComponentModel.Composition.Factories;
using System.ComponentModel.Composition.Hosting;
using Microsoft.VisualStudio.TestTools.UnitTesting;
using System.ComponentModel.Composition.Primitives;
namespace System.ComponentModel.Composition
{
[TestClass]
public class ImportEngineTests
{
[TestMethod]
public void PreviewImports_Successful_NoAtomicComposition_ShouldBlockChanges()
{
var exportProvider = ExportProviderFactory.CreateRecomposable();
var engine = new ImportEngine(exportProvider);
var import = ImportDefinitionFactory.Create("Value");
var importer = PartFactory.CreateImporter(import);
exportProvider.AddExport("Value", 21);
engine.PreviewImports(importer, null);
ExceptionAssert.Throws<ChangeRejectedException>(() =>
exportProvider.AddExport("Value", 22));
ExceptionAssert.Throws<ChangeRejectedException>(() =>
exportProvider.RemoveExport("Value"));
GC.KeepAlive(importer);
}
[TestMethod]
public void PreviewImports_Unsuccessful_NoAtomicComposition_ShouldNotBlockChanges()
{
var exportProvider = ExportProviderFactory.CreateRecomposable();
var engine = new ImportEngine(exportProvider);
var import = ImportDefinitionFactory.Create("Value");
var importer = PartFactory.CreateImporter(import);
ExceptionAssert.Throws<CompositionException>(() =>
engine.PreviewImports(importer, null));
exportProvider.AddExport("Value", 22);
exportProvider.AddExport("Value", 23);
exportProvider.RemoveExport("Value");
GC.KeepAlive(importer);
}
[TestMethod]
public void PreviewImports_Successful_AtomicComposition_Completeted_ShouldBlockChanges()
{
var exportProvider = ExportProviderFactory.CreateRecomposable();
var engine = new ImportEngine(exportProvider);
var import = ImportDefinitionFactory.Create("Value");
var importer = PartFactory.CreateImporter(import);
exportProvider.AddExport("Value", 21);
using (var atomicComposition = new AtomicComposition())
{
engine.PreviewImports(importer, atomicComposition);
atomicComposition.Complete();
}
ExceptionAssert.Throws<ChangeRejectedException>(() =>
exportProvider.AddExport("Value", 22));
ExceptionAssert.Throws<ChangeRejectedException>(() =>
exportProvider.RemoveExport("Value"));
GC.KeepAlive(importer);
}
[TestMethod]
public void PreviewImports_Successful_AtomicComposition_RolledBack_ShouldNotBlockChanges()
{
var exportProvider = ExportProviderFactory.CreateRecomposable();
var engine = new ImportEngine(exportProvider);
var import = ImportDefinitionFactory.Create("Value");
var importer = PartFactory.CreateImporter(import);
exportProvider.AddExport("Value", 21);
using (var atomicComposition = new AtomicComposition())
{
engine.PreviewImports(importer, atomicComposition);
// Let atomicComposition get disposed thus rolledback
}
exportProvider.AddExport("Value", 22);
exportProvider.RemoveExport("Value");
GC.KeepAlive(importer);
}
[TestMethod]
public void PreviewImports_Unsuccessful_AtomicComposition_ShouldNotBlockChanges()
{
var exportProvider = ExportProviderFactory.CreateRecomposable();
var engine = new ImportEngine(exportProvider);
var import = ImportDefinitionFactory.Create("Value");
var importer = PartFactory.CreateImporter(import);
using (var atomicComposition = new AtomicComposition())
{
ExceptionAssert.Throws<ChangeRejectedException>(() =>
engine.PreviewImports(importer, atomicComposition));
}
exportProvider.AddExport("Value", 22);
exportProvider.AddExport("Value", 23);
exportProvider.RemoveExport("Value");
GC.KeepAlive(importer);
}
[TestMethod]
public void PreviewImports_ReleaseImports_ShouldNotBlockChanges()
{
var exportProvider = ExportProviderFactory.CreateRecomposable();
var engine = new ImportEngine(exportProvider);
var import = ImportDefinitionFactory.Create("Value");
var importer = PartFactory.CreateImporter(import);
exportProvider.AddExport("Value", 21);
engine.PreviewImports(importer, null);
ExceptionAssert.Throws<ChangeRejectedException>(() =>
exportProvider.AddExport("Value", 22));
ExceptionAssert.Throws<ChangeRejectedException>(() =>
exportProvider.RemoveExport("Value"));
engine.ReleaseImports(importer, null);
exportProvider.AddExport("Value", 22);
exportProvider.RemoveExport("Value");
GC.KeepAlive(importer);
}
[TestMethod]
public void PreviewImports_MissingOptionalImport_ShouldSucceed()
{
var exportProvider = ExportProviderFactory.CreateRecomposable();
var engine = new ImportEngine(exportProvider);
var import = ImportDefinitionFactory.Create("Value", ImportCardinality.ZeroOrOne);
var importer = PartFactory.CreateImporter(import);
engine.PreviewImports(importer, null);
GC.KeepAlive(importer);
}
[TestMethod]
public void PreviewImports_ZeroCollectionImport_ShouldSucceed()
{
var exportProvider = ExportProviderFactory.CreateRecomposable();
var engine = new ImportEngine(exportProvider);
var import = ImportDefinitionFactory.Create("Value", ImportCardinality.ZeroOrMore);
var importer = PartFactory.CreateImporter(import);
engine.PreviewImports(importer, null);
GC.KeepAlive(importer);
}
[TestMethod]
public void PreviewImports_MissingOptionalImport_NonRecomposable_ShouldNotBlockChanges()
{
var exportProvider = ExportProviderFactory.CreateRecomposable();
var engine = new ImportEngine(exportProvider);
var import = ImportDefinitionFactory.Create("Value", ImportCardinality.ZeroOrOne, false, false);
var importer = PartFactory.CreateImporter(import);
engine.PreviewImports(importer, null);
exportProvider.AddExport("Value", 21);
exportProvider.AddExport("Value", 22);
exportProvider.RemoveExport("Value");
GC.KeepAlive(importer);
}
[TestMethod]
public void PreviewImports_ZeroCollectionImport_NonRecomposable_ShouldNotBlockChanges()
{
var exportProvider = ExportProviderFactory.CreateRecomposable();
var engine = new ImportEngine(exportProvider);
var import = ImportDefinitionFactory.Create("Value", ImportCardinality.ZeroOrMore, false, false);
var importer = PartFactory.CreateImporter(import);
engine.PreviewImports(importer, null);
exportProvider.AddExport("Value", 21);
exportProvider.AddExport("Value", 22);
exportProvider.RemoveExport("Value");
GC.KeepAlive(importer);
}
[TestMethod]
public void SatisfyImports_NonRecomposable_ValueShouldNotChange()
{
var exportProvider = ExportProviderFactory.CreateRecomposable();
var engine = new ImportEngine(exportProvider);
exportProvider.AddExport("Value", 21);
var import = ImportDefinitionFactory.Create("Value", false);
var importer = PartFactory.CreateImporter(import);
engine.SatisfyImports(importer);
Assert.AreEqual(21, importer.GetImport(import));
// After rejection batch failures throw ChangeRejectedException to indicate that
// the failure did not affect the container
ExceptionAssert.Throws<ChangeRejectedException>(() =>
exportProvider.ReplaceExportValue("Value", 42));
Assert.AreEqual(21, importer.GetImport(import), "Value should not change!");
GC.KeepAlive(importer);
}
[TestMethod]
public void SatisfyImports_Recomposable_ValueShouldChange()
{
var exportProvider = ExportProviderFactory.CreateRecomposable();
var engine = new ImportEngine(exportProvider);
exportProvider.AddExport("Value", 21);
var import = ImportDefinitionFactory.Create("Value", true);
var importer = PartFactory.CreateImporter(import);
engine.SatisfyImports(importer);
Assert.AreEqual(21, importer.GetImport(import));
exportProvider.ReplaceExportValue("Value", 42);
Assert.AreEqual(42, importer.GetImport(import), "Value should change!");
GC.KeepAlive(importer);
}
[TestMethod]
public void SatisfyImports_NonRecomposable_Prerequisite_ValueShouldNotChange()
{
var exportProvider = ExportProviderFactory.CreateRecomposable();
var engine = new ImportEngine(exportProvider);
var import = ImportDefinitionFactory.Create("Value", false, true);
var importer = PartFactory.CreateImporter(import);
exportProvider.AddExport("Value", 21);
engine.SatisfyImports(importer);
Assert.AreEqual(21, importer.GetImport(import));
ExceptionAssert.Throws<ChangeRejectedException>(() =>
exportProvider.ReplaceExportValue("Value", 42));
Assert.AreEqual(21, importer.GetImport(import), "Value should NOT change!");
GC.KeepAlive(importer);
}
[TestMethod]
public void SatisfyImports_Recomposable_Prerequisite_ValueShouldChange()
{
var exportProvider = ExportProviderFactory.CreateRecomposable();
var engine = new ImportEngine(exportProvider);
var import = ImportDefinitionFactory.Create("Value", true, true);
var importer = PartFactory.CreateImporter(import);
exportProvider.AddExport("Value", 21);
engine.SatisfyImports(importer);
Assert.AreEqual(21, importer.GetImport(import));
exportProvider.ReplaceExportValue("Value", 42);
Assert.AreEqual(42, importer.GetImport(import), "Value should change!");
GC.KeepAlive(importer);
}
[TestMethod]
public void SatisfyImports_OneRecomposable_OneNotRecomposable()
{
var exportProvider = ExportProviderFactory.CreateRecomposable();
var engine = new ImportEngine(exportProvider);
var import1 = ImportDefinitionFactory.Create("Value", true);
var import2 = ImportDefinitionFactory.Create("Value", false);
var importer = PartFactory.CreateImporter(import1, import2);
exportProvider.AddExport("Value", 21);
engine.SatisfyImports(importer);
// Initial compose values should be 21
Assert.AreEqual(21, importer.GetImport(import1));
Assert.AreEqual(21, importer.GetImport(import2));
// Reset value to ensure it doesn't get set to same value again
importer.ResetImport(import1);
importer.ResetImport(import2);
ExceptionAssert.Throws<ChangeRejectedException>(() =>
exportProvider.ReplaceExportValue("Value", 42));
Assert.AreEqual(null, importer.GetImport(import1), "Value should NOT have been set!");
Assert.AreEqual(null, importer.GetImport(import2), "Value should NOT have been set!");
GC.KeepAlive(importer);
}
[TestMethod]
public void SatisfyImports_TwoRecomposables_SingleExportValueChanged()
{
var exportProvider = ExportProviderFactory.CreateRecomposable();
var engine = new ImportEngine(exportProvider);
var import1 = ImportDefinitionFactory.Create("Value1", true);
var import2 = ImportDefinitionFactory.Create("Value2", true);
var importer = PartFactory.CreateImporter(import1, import2);
exportProvider.AddExport("Value1", 21);
exportProvider.AddExport("Value2", 23);
engine.SatisfyImports(importer);
Assert.AreEqual(21, importer.GetImport(import1));
Assert.AreEqual(23, importer.GetImport(import2));
importer.ResetImport(import1);
importer.ResetImport(import2);
// Only change Value1
exportProvider.ReplaceExportValue("Value1", 42);
Assert.AreEqual(42, importer.GetImport(import1), "Value should have been set!");
Assert.AreEqual(null, importer.GetImport(import2), "Value should NOT have changed to the value in the container.");
GC.KeepAlive(importer);
}
[TestMethod]
public void SatisfyImports_Recomposable_Unregister_ValueShouldChangeOnce()
{
var exportProvider = ExportProviderFactory.CreateRecomposable();
var engine = new ImportEngine(exportProvider);
exportProvider.AddExport("Value", 21);
var import = ImportDefinitionFactory.Create("Value", true);
var importer = PartFactory.CreateImporter(import);
engine.SatisfyImports(importer);
Assert.AreEqual(21, importer.GetImport(import));
exportProvider.ReplaceExportValue("Value", 42);
Assert.AreEqual(42, importer.GetImport(import), "Value should change!");
engine.ReleaseImports(importer, null);
exportProvider.ReplaceExportValue("Value", 666);
Assert.AreEqual(42, importer.GetImport(import), "Value should not change!");
GC.KeepAlive(importer);
}
[TestMethod]
public void SatisfyImports_MissingOptionalImport_NonRecomposable_ShouldNotBlockChanges()
{
var exportProvider = ExportProviderFactory.CreateRecomposable();
var engine = new ImportEngine(exportProvider);
var import = ImportDefinitionFactory.Create("Value", ImportCardinality.ZeroOrOne, false, false);
var importer = PartFactory.CreateImporter(import);
exportProvider.AddExport("Value", 20);
engine.SatisfyImports(importer);
ExceptionAssert.Throws<ChangeRejectedException>(() =>
exportProvider.AddExport("Value", 21));
ExceptionAssert.Throws<ChangeRejectedException>(() =>
exportProvider.RemoveExport("Value"));
GC.KeepAlive(importer);
}
[TestMethod]
public void SatisfyImports_ZeroCollectionImport_NonRecomposable_ShouldNotBlockChanges()
{
var exportProvider = ExportProviderFactory.CreateRecomposable();
var engine = new ImportEngine(exportProvider);
var import = ImportDefinitionFactory.Create("Value", ImportCardinality.ZeroOrMore, false, false);
var importer = PartFactory.CreateImporter(import);
exportProvider.AddExport("Value", 20);
engine.SatisfyImports(importer);
ExceptionAssert.Throws<ChangeRejectedException>(() =>
exportProvider.AddExport("Value", 21));
ExceptionAssert.Throws<ChangeRejectedException>(() =>
exportProvider.RemoveExport("Value"));
GC.KeepAlive(importer);
}
[TestMethod]
public void SatisfyImports_MissingOptionalImport_Recomposable_ShouldNotBlockChanges()
{
var exportProvider = ExportProviderFactory.CreateRecomposable();
var engine = new ImportEngine(exportProvider);
var import = ImportDefinitionFactory.Create("Value", ImportCardinality.ZeroOrOne, true, false);
var importer = PartFactory.CreateImporter(import);
exportProvider.AddExport("Value", 20);
engine.SatisfyImports(importer);
exportProvider.AddExport("Value", 21);
exportProvider.RemoveExport("Value");
GC.KeepAlive(importer);
}
[TestMethod]
public void SatisfyImports_ZeroCollectionImport_Recomposable_ShouldNotBlockChanges()
{
var exportProvider = ExportProviderFactory.CreateRecomposable();
var engine = new ImportEngine(exportProvider);
var import = ImportDefinitionFactory.Create("Value", ImportCardinality.ZeroOrMore, true, false);
var importer = PartFactory.CreateImporter(import);
exportProvider.AddExport("Value", 20);
engine.SatisfyImports(importer);
exportProvider.AddExport("Value", 21);
exportProvider.RemoveExport("Value");
GC.KeepAlive(importer);
}
[TestMethod]
public void SatisfyImportsOnce_Recomposable_ValueShouldNotChange_NoRecompositionRequested()
{
var exportProvider = ExportProviderFactory.CreateRecomposable();
var engine = new ImportEngine(exportProvider);
exportProvider.AddExport("Value", 21);
var import = ImportDefinitionFactory.Create("Value", true);
var importer = PartFactory.CreateImporter(import);
engine.SatisfyImportsOnce(importer);
Assert.AreEqual(21, importer.GetImport(import));
exportProvider.ReplaceExportValue("Value", 42);
Assert.AreEqual(21, importer.GetImport(import), "Value should not change!");
GC.KeepAlive(importer);
}
[TestMethod]
public void SatisifyImportsOnce_Recomposable_ValueShouldNotChange_NoRecompositionRequested_ViaNonArgumentSignature()
{
var exportProvider = ExportProviderFactory.CreateRecomposable();
var engine = new ImportEngine(exportProvider);
exportProvider.AddExport("Value", 21);
var import = ImportDefinitionFactory.Create("Value", true);
var importer = PartFactory.CreateImporter(import);
engine.SatisfyImportsOnce(importer);
Assert.AreEqual(21, importer.GetImport(import));
exportProvider.ReplaceExportValue("Value", 42);
Assert.AreEqual(21, importer.GetImport(import), "Value should not change!");
GC.KeepAlive(importer);
}
[TestMethod]
public void SatisfyImportsOnce_Successful_ShouldNotBlockChanges()
{
var exportProvider = ExportProviderFactory.CreateRecomposable();
var engine = new ImportEngine(exportProvider);
var import = ImportDefinitionFactory.Create("Value");
var importer = PartFactory.CreateImporter(import);
exportProvider.AddExport("Value", 21);
engine.SatisfyImportsOnce(importer);
exportProvider.AddExport("Value", 22);
exportProvider.RemoveExport("Value");
GC.KeepAlive(importer);
}
[TestMethod]
public void SatisfyImportsOnce_Unsuccessful_ShouldNotBlockChanges()
{
var exportProvider = ExportProviderFactory.CreateRecomposable();
var engine = new ImportEngine(exportProvider);
var import = ImportDefinitionFactory.Create("Value");
var importer = PartFactory.CreateImporter(import);
ExceptionAssert.Throws<CompositionException>(() =>
engine.SatisfyImportsOnce(importer));
exportProvider.AddExport("Value", 22);
exportProvider.AddExport("Value", 23);
exportProvider.RemoveExport("Value");
GC.KeepAlive(importer);
}
}
}
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