Add tests for the cs_CZ regression

This ensures that going forward this won't not sort correctly.

2 files changed, 24 insertions, 0 deletions

diff --git a/tests/conftest.py b/tests/conftest.py
index c63e149..6cd922b 100644
--- a/tests/conftest.py
+++ b/tests/conftest.py
@@ -48,3 +48,19 @@ def with_locale_de_de() -> Iterator[None]:
         yield
     finally:
         locale.setlocale(locale.LC_ALL, orig)
+
+
+@pytest.fixture()
+def with_locale_cs_cz() -> Iterator[None]:
+    """
+    Convenience to load the cs_CZ locale - reset when complete - skip if missing.
+    """
+    orig = locale.getlocale()
+    try:
+        load_locale("cs_CZ")
+    except locale.Error:
+        pytest.skip("requires cs_CZ locale to be installed")
+    else:
+        yield
+    finally:
+        locale.setlocale(locale.LC_ALL, orig)
diff --git a/tests/test_natsorted.py b/tests/test_natsorted.py
index d043ab4..4a64a27 100644
--- a/tests/test_natsorted.py
+++ b/tests/test_natsorted.py
@@ -251,6 +251,14 @@ def test_natsorted_locale_bug_regression_test_109() -> None:
     assert natsorted(given, alg=ns.LOCALE) == expected
 
 
+@pytest.mark.usefixtures("with_locale_cs_cz")
+def test_natsorted_locale_bug_regression_test_140() -> None:
+    # https://github.com/SethMMorton/natsort/issues/140
+    given = ["Aš", "Cheb", "Česko", "Cibulov", "Znojmo", "Žilina"]
+    expected = ["Aš", "Cibulov", "Česko", "Cheb", "Znojmo", "Žilina"]
+    assert natsorted(given, alg=ns.LOCALE) == expected
+
+
 @pytest.mark.parametrize(
     "alg, expected",
     [