Catch and report correctly empty exceptions raised in subject method

Author: Maxcode123

src/unittest_extensions/case.py

@@ -59,6 +59,8 @@ def result(self) -> Any:
             self._subjectResult = self.subject(**self._subjectKwargs)
             return self._subjectResult
         except Exception as e:
+            if len(e.args) == 0:
+                raise e
             msg = e.args[0]
             if "subject() got an unexpected keyword argument" in msg:
                 raise TestError(

src/unittest_extensions/tests/test_use_case.py

@@ -193,3 +193,14 @@ def test_mutate_cached_result(self):
         self.assertResult([1, 2])
         self.cachedResult().append(3)
         self.assertListEqual(self.cachedResult(), [1, 2])
+
+
+class TestRaiseEmptyException(TestCase):
+    class MyError(Exception):
+        pass
+
+    def subject(self):
+        raise self.MyError()  # exception should be empty, i.e. no args
+
+    def test_reraises_empty_exception(self):
+        self.assertResultRaises(self.MyError)