test: failing test for isort's skip_glob setting

src/darker/tests/test_main_isort.py

@@ -1,5 +1,5 @@
 """Tests for the ``--isort`` option of the ``darker`` command-line interface."""
-
+from textwrap import dedent
 # pylint: disable=redefined-outer-name,unused-argument,use-dict-literal
 
 from types import SimpleNamespace
@@ -81,3 +81,32 @@ def test_isort_option_with_isort_calls_sortimports(run_isort, isort_args):
         settings_path=str(run_isort.root),
         **isort_args,
     )
+
+
+def test_isort_respects_skip_glob(tmp_path, monkeypatch):
+    """Test that Darker respects isort's skip_glob setting."""
+    # Create a pyproject.toml file with isort skip_glob configuration
+    configuration = dedent(
+        """
+        [tool.isort]
+        skip_glob = ['*/conf/settings/*']
+        filter_files = true
+        """
+    )
+    (tmp_path / "pyproject.toml").write_text(configuration)
+    # Create a file that should be skipped
+    settings_dir = tmp_path / "conf" / "settings"
+    settings_dir.mkdir(parents=True)
+    backoffice_py = settings_dir / "backoffice.py"
+    backoffice_py.write_text("import sys\nimport os\n")
+
+    # Run darker with --isort
+    darker.__main__.main(["--isort", str(settings_dir / "backoffice.py")])
+    ## Strangely, calling isort as a subprocess instead respects the configuration:
+    # import subprocess
+    # subprocess.run(
+    #     f"isort --settings-path={settings_dir} {settings_dir / 'backoffice.py'}",
+    #     shell=True
+    # )
+
+    assert backoffice_py.read_text() == "import sys\nimport os\n"