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.Equal(21, importer.GetImport(import));
exportProvider.ReplaceExportValue("Value", 42);
Assert.Equal(42, importer.GetImport(import));
engine.ReleaseImports(importer, null);
exportProvider.ReplaceExportValue("Value", 666);
Assert.Equal(42, importer.GetImport(import));
GC.KeepAlive(importer);
}
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);
}