Add arguments checking to then callback

2014-04-13 18:26:01 -07:00
parent c2b9d14268
commit cfb60cddf0
2 changed files with 21 additions and 0 deletions
--- a/test/test_capability.py
+++ b/test/test_capability.py
@@ -289,3 +289,13 @@ def test_timer():
    joined = capnp.join_promises([promise, canceller])
    with pytest.raises(Exception):
        joined.wait()
+
+
+def test_then_args():
+    capnp.Promise(0).then(lambda x: 1)
+
+    with pytest.raises(ValueError):
+        capnp.Promise(0).then(lambda: 1)
+
+    with pytest.raises(ValueError):
+        capnp.Promise(0).then(lambda x, y: 1)