Only use trailing commas in function signatures when it's safe

[etc/vim.git] / tests / test_black.py

diff --git a/tests/test_black.py b/tests/test_black.py
index 223c907217059b50c3a822c54f2649adf7d85118..1dda5fc963de828384e656d31894cbf379ac01c0 100644 (file)
--- a/tests/test_black.py
+++ b/tests/test_black.py
@@ -108,6 +108,14 @@ class BlackTestCase(unittest.TestCase):
         black.assert_equivalent(source, actual)
         black.assert_stable(source, actual, line_length=ll)
 
+    @patch("black.dump_to_file", dump_to_stderr)
+    def test_fstring(self) -> None:
+        source, expected = read_data('fstring')
+        actual = fs(source)
+        self.assertFormatEqual(expected, actual)
+        black.assert_equivalent(source, actual)
+        black.assert_stable(source, actual, line_length=ll)
+
     @patch("black.dump_to_file", dump_to_stderr)
     def test_comments(self) -> None:
         source, expected = read_data('comments')
@@ -215,6 +223,24 @@ class BlackTestCase(unittest.TestCase):
             )
             self.assertEqual(report.return_code, 123)
 
+    def test_is_python36(self):
+        node = black.lib2to3_parse("def f(*, arg): ...\n")
+        self.assertFalse(black.is_python36(node))
+        node = black.lib2to3_parse("def f(*, arg,): ...\n")
+        self.assertTrue(black.is_python36(node))
+        node = black.lib2to3_parse("def f(*, arg): f'string'\n")
+        self.assertTrue(black.is_python36(node))
+        source, expected = read_data('function')
+        node = black.lib2to3_parse(source)
+        self.assertTrue(black.is_python36(node))
+        node = black.lib2to3_parse(expected)
+        self.assertTrue(black.is_python36(node))
+        source, expected = read_data('expression')
+        node = black.lib2to3_parse(source)
+        self.assertFalse(black.is_python36(node))
+        node = black.lib2to3_parse(expected)
+        self.assertFalse(black.is_python36(node))
+
 
 if __name__ == '__main__':
     unittest.main()