public void Init()
{
_importers = new JsonImporterCollection();
_thing1Importer = new TestImporter(_thing1Type);
_thing2Importer = new TestImporter(_thing2Type);
}
public void Registration()
{
Type type = typeof(Thing);
JsonImporterCollection importers = new JsonImporterCollection();
Assert.IsNull(importers.Find(type));
ImportAwareImporter importer = new ImportAwareImporter(type);
importers.Register(importer);
Assert.AreSame(importer, importers.Find(type));
}