1 files changed, 57 insertions, 0 deletions
diff --git a/tests/test_keys.py b/tests/test_keys.py
new file mode 100644
index 0000000..892a620
--- /dev/null
+++ b/tests/test_keys.py
@@ -0,0 +1,57 @@
+import unittest
+
+import cachetools.keys
+
+
+class CacheKeysTest(unittest.TestCase):
+    def test_hashkey(self, key=cachetools.keys.hashkey):
+        self.assertEqual(key(), key())
+        self.assertEqual(hash(key()), hash(key()))
+        self.assertEqual(key(1, 2, 3), key(1, 2, 3))
+        self.assertEqual(hash(key(1, 2, 3)), hash(key(1, 2, 3)))
+        self.assertEqual(key(1, 2, 3, x=0), key(1, 2, 3, x=0))
+        self.assertEqual(hash(key(1, 2, 3, x=0)), hash(key(1, 2, 3, x=0)))
+        self.assertNotEqual(key(1, 2, 3), key(3, 2, 1))
+        self.assertNotEqual(key(1, 2, 3), key(1, 2, 3, x=None))
+        self.assertNotEqual(key(1, 2, 3, x=0), key(1, 2, 3, x=None))
+        self.assertNotEqual(key(1, 2, 3, x=0), key(1, 2, 3, y=0))
+        with self.assertRaises(TypeError):
+            hash(key({}))
+        # untyped keys compare equal
+        self.assertEqual(key(1, 2, 3), key(1.0, 2.0, 3.0))
+        self.assertEqual(hash(key(1, 2, 3)), hash(key(1.0, 2.0, 3.0)))
+
+    def test_typedkey(self, key=cachetools.keys.typedkey):
+        self.assertEqual(key(), key())
+        self.assertEqual(hash(key()), hash(key()))
+        self.assertEqual(key(1, 2, 3), key(1, 2, 3))
+        self.assertEqual(hash(key(1, 2, 3)), hash(key(1, 2, 3)))
+        self.assertEqual(key(1, 2, 3, x=0), key(1, 2, 3, x=0))
+        self.assertEqual(hash(key(1, 2, 3, x=0)), hash(key(1, 2, 3, x=0)))
+        self.assertNotEqual(key(1, 2, 3), key(3, 2, 1))
+        self.assertNotEqual(key(1, 2, 3), key(1, 2, 3, x=None))
+        self.assertNotEqual(key(1, 2, 3, x=0), key(1, 2, 3, x=None))
+        self.assertNotEqual(key(1, 2, 3, x=0), key(1, 2, 3, y=0))
+        with self.assertRaises(TypeError):
+            hash(key({}))
+        # typed keys compare unequal
+        self.assertNotEqual(key(1, 2, 3), key(1.0, 2.0, 3.0))
+
+    def test_addkeys(self, key=cachetools.keys.hashkey):
+        self.assertIsInstance(key(), tuple)
+        self.assertIsInstance(key(1, 2, 3) + key(4, 5, 6), type(key()))
+        self.assertIsInstance(key(1, 2, 3) + (4, 5, 6), type(key()))
+        self.assertIsInstance((1, 2, 3) + key(4, 5, 6), type(key()))
+
+    def test_pickle(self, key=cachetools.keys.hashkey):
+        import pickle
+
+        for k in [key(), key("abc"), key("abc", 123), key("abc", q="abc")]:
+            # white-box test: assert cached hash value is not pickled
+            self.assertEqual(len(k.__dict__), 0)
+            h = hash(k)
+            self.assertEqual(len(k.__dict__), 1)
+            pickled = pickle.loads(pickle.dumps(k))
+            self.assertEqual(len(pickled.__dict__), 0)
+            self.assertEqual(k, pickled)
+            self.assertEqual(h, hash(pickled))