quick test for creating an index on binary data - jeff wants to be su…

…re this works

test/test_collection.py

@@ -21,6 +21,7 @@
 import qcheck
 from test_connection import get_connection
 from pymongo.objectid import ObjectId
+from pymongo.binary import Binary
 from pymongo.collection import Collection
 from pymongo.errors import InvalidName, OperationFailure
 from pymongo import ASCENDING, DESCENDING
@@ -91,6 +92,18 @@ def test_create_index(self):
                               (u"key", SON([(u"hello", -1),
                                             (u"world", 1)]))]))
 
+    def test_index_on_binary(self):
+        db = self.db
+        db.drop_collection("test")
+        db.test.save({"bin": Binary("def")})
+        db.test.save({"bin": Binary("abc")})
+        db.test.save({"bin": Binary("ghi")})
+
+        self.assertEqual(db.test.find({"bin": Binary("abc")}).explain()["nscanned"], 3)
+
+        db.test.create_index("bin", ASCENDING)
+        self.assertEqual(db.test.find({"bin": Binary("abc")}).explain()["nscanned"], 1)
+
     def test_drop_index(self):
         db = self.db
         db.test.drop_indexes()