Add expected failure tests with the unstable formattings

diff --git a/tests/data/trailing_comma_optional_parens1.py b/tests/data/trailing_comma_optional_parens1.py
new file mode 100644 (file)
index 0000000..5ad29a8
--- /dev/null
+++ b/tests/data/trailing_comma_optional_parens1.py
@@ -0,0 +1,3 @@
+if e1234123412341234.winerror not in (_winapi.ERROR_SEM_TIMEOUT,
+                        _winapi.ERROR_PIPE_BUSY) or _check_timeout(t):
+    pass
\ No newline at end of file

diff --git a/tests/data/trailing_comma_optional_parens2.py b/tests/data/trailing_comma_optional_parens2.py
new file mode 100644 (file)
index 0000000..2817073
--- /dev/null
+++ b/tests/data/trailing_comma_optional_parens2.py
@@ -0,0 +1,3 @@
+if (e123456.get_tk_patchlevel() >= (8, 6, 0, 'final') or
+    (8, 5, 8) <= get_tk_patchlevel() < (8, 6)):
+    pass
\ No newline at end of file

diff --git a/tests/data/trailing_comma_optional_parens3.py b/tests/data/trailing_comma_optional_parens3.py
new file mode 100644 (file)
index 0000000..e6a673e
--- /dev/null
+++ b/tests/data/trailing_comma_optional_parens3.py
@@ -0,0 +1,8 @@
+if True:
+    if True:
+        if True:
+            return _(
+                "qweasdzxcqweasdzxcqweasdzxcqweasdzxcqweasdzxcqweasdzxcqweasdzxcqweasdzxcqweasdzxcqweas "
+                + "qweasdzxcqweasdzxcqweasdzxcqweasdzxcqweasdzxcqweasdzxcqweasdzxcqweasdzxcqwegqweasdzxcqweasdzxc.",
+                "qweasdzxcqweasdzxcqweasdzxcqweasdzxcqweasdzxcqweasdzxcqweasdzxcqweasdzxcqweasdzxcqwe",
+            ) % {"reported_username": reported_username, "report_reason": report_reason}
\ No newline at end of file

diff --git a/tests/test_black.py b/tests/test_black.py
index cf311f52e14d813de8eff44e6394f9463cd621d9..f5d4e1115a891a63dfc82d636a7377d26209ee13 100644 (file)
--- a/tests/test_black.py
+++ b/tests/test_black.py
@@ -368,6 +368,27 @@ class BlackTestCase(unittest.TestCase):
         black.assert_equivalent(source, actual)
         black.assert_stable(source, actual, DEFAULT_MODE)
 
+    @unittest.expectedFailure
+    @patch("black.dump_to_file", dump_to_stderr)
+    def test_trailing_comma_optional_parens_stability1(self) -> None:
+        source, _expected = read_data("trailing_comma_optional_parens1")
+        actual = fs(source)
+        black.assert_stable(source, actual, DEFAULT_MODE)
+
+    @unittest.expectedFailure
+    @patch("black.dump_to_file", dump_to_stderr)
+    def test_trailing_comma_optional_parens_stability2(self) -> None:
+        source, _expected = read_data("trailing_comma_optional_parens2")
+        actual = fs(source)
+        black.assert_stable(source, actual, DEFAULT_MODE)
+
+    @unittest.expectedFailure
+    @patch("black.dump_to_file", dump_to_stderr)
+    def test_trailing_comma_optional_parens_stability3(self) -> None:
+        source, _expected = read_data("trailing_comma_optional_parens3")
+        actual = fs(source)
+        black.assert_stable(source, actual, DEFAULT_MODE)
+
     @patch("black.dump_to_file", dump_to_stderr)
     def test_expression(self) -> None:
         source, expected = read_data("expression")