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);
Assert.Throws <ChangeRejectedException>(() =>
exportProvider.AddExport("Value", 22));
Assert.Throws <ChangeRejectedException>(() =>
exportProvider.RemoveExport("Value"));
engine.ReleaseImports(importer, null);
exportProvider.AddExport("Value", 22);
exportProvider.RemoveExport("Value");
GC.KeepAlive(importer);
}
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);
}
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);
}
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);
Assert.Throws <CompositionException>(() =>
engine.PreviewImports(importer, null));
exportProvider.AddExport("Value", 22);
exportProvider.AddExport("Value", 23);
exportProvider.RemoveExport("Value");
GC.KeepAlive(importer);
}
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);
}
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();
}
Assert.Throws <ChangeRejectedException>(() =>
exportProvider.AddExport("Value", 22));
Assert.Throws <ChangeRejectedException>(() =>
exportProvider.RemoveExport("Value"));
GC.KeepAlive(importer);
}