chore: use raise..from for chained exceptions (#939)fix/raise-from

1 files changed, 19 insertions, 0 deletions

diff --git a/gitlab/tests/test_exceptions.py b/gitlab/tests/test_exceptions.py
new file mode 100644
index 0000000..1f00af0
--- /dev/null
+++ b/gitlab/tests/test_exceptions.py
@@ -0,0 +1,19 @@
+import unittest
+
+from gitlab import exceptions
+
+
+class TestExceptions(unittest.TestCase):
+    def test_error_raises_from_http_error(self):
+        """Methods decorated with @on_http_error should raise from GitlabHttpError."""
+
+        class TestError(Exception):
+            pass
+
+        @exceptions.on_http_error(TestError)
+        def raise_error_from_http_error():
+            raise exceptions.GitlabHttpError
+
+        with self.assertRaises(TestError) as context:
+            raise_error_from_http_error()
+        self.assertIsInstance(context.exception.__cause__, exceptions.GitlabHttpError)