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Re-export black.Mode (#3875)
authorJelle Zijlstra <jelle.zijlstra@gmail.com>
Sun, 10 Sep 2023 23:12:20 +0000 (16:12 -0700)
committerGitHub <noreply@github.com>
Sun, 10 Sep 2023 23:12:20 +0000 (16:12 -0700)
src/black/__init__.py
tests/test_black.py

index 6fc91d2e6d379d6d631caf142b7006af7f6c3d2a..188a4f79f0e51f027f445525bda3b2e68fd93081 100644 (file)
@@ -63,14 +63,9 @@ from black.handle_ipynb_magics import (
 )
 from black.linegen import LN, LineGenerator, transform_line
 from black.lines import EmptyLineTracker, LinesBlock
 )
 from black.linegen import LN, LineGenerator, transform_line
 from black.lines import EmptyLineTracker, LinesBlock
-from black.mode import (
-    FUTURE_FLAG_TO_FEATURE,
-    VERSION_TO_FEATURES,
-    Feature,
-    Mode,
-    TargetVersion,
-    supports_feature,
-)
+from black.mode import FUTURE_FLAG_TO_FEATURE, VERSION_TO_FEATURES, Feature
+from black.mode import Mode as Mode  # re-exported
+from black.mode import TargetVersion, supports_feature
 from black.nodes import (
     STARS,
     is_number_token,
 from black.nodes import (
     STARS,
     is_number_token,
index badb8fff5fbca49be9bf07cc1ea438a624e74885..d22b6859607a0ed059c553a76ecbd253ea6e0566 100644 (file)
@@ -2482,6 +2482,41 @@ class TestFileCollection:
         )
 
 
         )
 
 
+class TestDeFactoAPI:
+    """Test that certain symbols that are commonly used externally keep working.
+
+    We don't (yet) formally expose an API (see issue #779), but we should endeavor to
+    keep certain functions that external users commonly rely on working.
+
+    """
+
+    def test_format_str(self) -> None:
+        # format_str and Mode should keep working
+        assert (
+            black.format_str("print('hello')", mode=black.Mode()) == 'print("hello")\n'
+        )
+
+        # you can pass line length
+        assert (
+            black.format_str("print('hello')", mode=black.Mode(line_length=42))
+            == 'print("hello")\n'
+        )
+
+        # invalid input raises InvalidInput
+        with pytest.raises(black.InvalidInput):
+            black.format_str("syntax error", mode=black.Mode())
+
+    def test_format_file_contents(self) -> None:
+        # You probably should be using format_str() instead, but let's keep
+        # this one around since people do use it
+        assert (
+            black.format_file_contents("x=1", fast=True, mode=black.Mode()) == "x = 1\n"
+        )
+
+        with pytest.raises(black.NothingChanged):
+            black.format_file_contents("x = 1\n", fast=True, mode=black.Mode())
+
+
 try:
     with open(black.__file__, "r", encoding="utf-8") as _bf:
         black_source_lines = _bf.readlines()
 try:
     with open(black.__file__, "r", encoding="utf-8") as _bf:
         black_source_lines = _bf.readlines()