1 files changed, 60 insertions, 0 deletions
diff --git a/tests/functional/u/use/used_before_assignment_nonlocal.py b/tests/functional/u/use/used_before_assignment_nonlocal.py
new file mode 100644
index 000000000..5cbdd510c
--- /dev/null
+++ b/tests/functional/u/use/used_before_assignment_nonlocal.py
@@ -0,0 +1,60 @@
+"""Check for nonlocal and used-before-assignment"""
+# pylint: disable=missing-docstring, unused-variable, no-init, too-few-public-methods
+
+__revision__ = 0
+
+def test_ok():
+    """ uses nonlocal """
+    cnt = 1
+    def wrap():
+        nonlocal cnt
+        cnt = cnt + 1
+    wrap()
+
+def test_fail():
+    """ doesn't use nonlocal """
+    cnt = 1
+    def wrap():
+        cnt = cnt + 1 # [used-before-assignment]
+    wrap()
+
+def test_fail2():
+    """ use nonlocal, but for other variable """
+    cnt = 1
+    count = 1
+    def wrap():
+        nonlocal count
+        cnt = cnt + 1 # [used-before-assignment]
+    wrap()
+
+def test_fail3(arg: test_fail4): # [used-before-assignment]
+    """ Depends on `test_fail4`, in argument annotation. """
+    return arg
+# +1: [used-before-assignment, used-before-assignment]
+def test_fail4(*args: test_fail5, **kwargs: undefined):
+    """ Depends on `test_fail5` and `undefined` in
+    variable and named arguments annotations.
+    """
+    return args, kwargs
+
+def test_fail5()->undefined1: # [used-before-assignment]
+    """ Depends on `undefined1` in function return annotation. """
+
+def undefined():
+    """ no op """
+
+def undefined1():
+    """ no op """
+
+
+def nonlocal_in_ifexp():
+    """bar"""
+    bug2 = True
+    def on_click(event):
+        """on_click"""
+        if event:
+            nonlocal bug2
+            bug2 = not bug2
+    on_click(True)
+
+nonlocal_in_ifexp()