1 files changed, 22 insertions, 0 deletions
diff --git a/tests/test_test_helper.py b/tests/test_test_helper.py
new file mode 100644
index 0000000..e836ad1
--- /dev/null
+++ b/tests/test_test_helper.py
@@ -0,0 +1,22 @@
+import os
+
+from .helper import cd
+
+
+class SomeTestError(Exception):
+    """An arbitrary error to be thrown by the test."""
+    pass
+
+
+def test_test_helper():
+    """Check that the cd test helper duly resets the directory even in spite of an error."""
+    old_dir = os.getcwd()
+    exception_seen = False
+    try:
+        with cd(".."):
+            raise SomeTestError("Just raising an exception, as failing tests sometimes do.")
+    except SomeTestError:
+        now_dir = os.getcwd()
+        assert old_dir == now_dir
+        exception_seen = True
+    assert exception_seen