Don't write back stdin to stdout when --check is passed

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

diff --git a/tests/test_black.py b/tests/test_black.py
index 225ece6f474e5f66ff7efdc17da8e9f906e516f0..7dba611141c099e9054421f55bd371ac242fced3 100644 (file)
--- a/tests/test_black.py
+++ b/tests/test_black.py
@@ -89,7 +89,7 @@ class BlackTestCase(unittest.TestCase):
         try:
             sys.stdin, sys.stdout = StringIO(source), StringIO()
             sys.stdin.name = '<stdin>'
         try:
             sys.stdin, sys.stdout = StringIO(source), StringIO()
             sys.stdin.name = '<stdin>'

-            black.format_stdin_to_stdout(line_length=ll, fast=True)
+            black.format_stdin_to_stdout(line_length=ll, fast=True, write_back=True)

             sys.stdout.seek(0)
             actual = sys.stdout.read()
         finally:
             sys.stdout.seek(0)
             actual = sys.stdout.read()
         finally:


@@ -171,6 +171,14 @@ class BlackTestCase(unittest.TestCase):
         black.assert_equivalent(source, actual)
         black.assert_stable(source, actual, line_length=ll)
 
         black.assert_equivalent(source, actual)
         black.assert_stable(source, actual, line_length=ll)
 

+    @patch("black.dump_to_file", dump_to_stderr)
+    def test_empty_lines(self) -> None:
+        source, expected = read_data('empty_lines')
+        actual = fs(source)
+        self.assertFormatEqual(expected, actual)
+        black.assert_equivalent(source, actual)
+        black.assert_stable(source, actual, line_length=ll)
+

     def test_report(self) -> None:
         report = black.Report()
         out_lines = []
     def test_report(self) -> None:
         report = black.Report()
         out_lines = []