test_call_wait patch to (begin to) test wait after finished

patch.txt

diff --git a/tests/core/test_call_wait.py b/tests/core/test_call_wait.py
index db8e650..9b57353 100644
--- a/tests/core/test_call_wait.py
+++ b/tests/core/test_call_wait.py
@@ -168,3 +168,14 @@ def test_eval(manager, watcher, app):
 
     value = x.value
     assert value == 3
+
+
+def test_wait_too_late(manager, watcher, app):
+    event = foo()
+    manager.fire(event)
+    assert watcher.wait("foo_success")
+
+    yield
+    x = yield manager.wait(event)
+    value = x.value
+    assert value == list(range(1, 10))