Compute a hash value for data types.

1 files changed, 17 insertions, 0 deletions

diff --git a/tests/analysis/type.py b/tests/analysis/type.py
index 5106cbc..b690a55 100644
--- a/tests/analysis/type.py
+++ b/tests/analysis/type.py
@@ -90,3 +90,20 @@ class TestDataType(ChrysalideTestCase):
         self.assertEqual(str(tp), 'NS.TP')
 
         self.assertEqual(tp.namespace, (ns, '.'))
+
+
+    def testTypeHash(self):
+        """Hash a user-defined type."""
+
+        class MyUserType(DataType):
+
+            def __init__(self, name):
+                super(MyUserType, self).__init__()
+                self._name = name
+
+            def _hash(self):
+                return hash(self._name)
+
+        tp = MyUserType('random')
+
+        self.assertEqual(tp.hash, hash('random') & ((1 << 32) - 1))