1 files changed, 72 insertions, 0 deletions
diff --git a/src/mango/test/21-empty-selector-tests.py b/src/mango/test/21-empty-selector-tests.py
new file mode 100644
index 000000000..fda18f6e4
--- /dev/null
+++ b/src/mango/test/21-empty-selector-tests.py
@@ -0,0 +1,72 @@
+# Licensed under the Apache License, Version 2.0 (the "License"); you may not
+# use this file except in compliance with the License. You may obtain a copy of
+# the License at
+#
+#   http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+# License for the specific language governing permissions and limitations under
+# the License.
+
+import json
+import mango
+import unittest
+import user_docs
+import math
+
+
+def make_empty_selector_suite(klass):
+    class EmptySelectorTestCase(klass):
+        def test_empty(self):
+            resp = self.db.find({}, explain=True)
+            self.assertEqual(resp["index"]["type"], "special")
+
+        def test_empty_array_or(self):
+            resp = self.db.find({"$or": []}, explain=True)
+            self.assertEqual(resp["index"]["type"], klass.INDEX_TYPE)
+            docs = self.db.find({"$or": []})
+            assert len(docs) == 0
+
+        def test_empty_array_or_with_age(self):
+            resp = self.db.find({"age": 22, "$or": []}, explain=True)
+            self.assertEqual(resp["index"]["type"], klass.INDEX_TYPE)
+            docs = self.db.find({"age": 22, "$or": []})
+            assert len(docs) == 1
+
+        def test_empty_array_and_with_age(self):
+            resp = self.db.find(
+                {"age": 22, "$and": [{"b": {"$all": []}}]}, explain=True
+            )
+            self.assertEqual(resp["index"]["type"], klass.INDEX_TYPE)
+            docs = self.db.find({"age": 22, "$and": []})
+            assert len(docs) == 1
+
+        def test_empty_arrays_complex(self):
+            resp = self.db.find({"$or": [], "a": {"$in": []}}, explain=True)
+            self.assertEqual(resp["index"]["type"], klass.INDEX_TYPE)
+            docs = self.db.find({"$or": [], "a": {"$in": []}})
+            assert len(docs) == 0
+
+        def test_empty_nin(self):
+            resp = self.db.find({"favorites": {"$nin": []}}, explain=True)
+            self.assertEqual(resp["index"]["type"], klass.INDEX_TYPE)
+            docs = self.db.find({"favorites": {"$nin": []}})
+            assert len(docs) == len(user_docs.DOCS)
+
+    return EmptySelectorTestCase
+
+
+class EmptySelectorNoIndexTests(
+    make_empty_selector_suite(mango.UserDocsTestsNoIndexes)
+):
+    pass
+
+@unittest.skipUnless(mango.has_text_service(), "requires text service")
+class EmptySelectorTextTests(make_empty_selector_suite(mango.UserDocsTextTests)):
+    pass
+
+
+class EmptySelectorUserDocTests(make_empty_selector_suite(mango.UserDocsTests)):
+    pass