additional unit tests

tests/test_helpers.py

@@ -94,3 +94,35 @@ class HelpersTestCase(IsolatedAsyncioTestCase):
         self.assertEqual("tasks", helpers.tasks_str(2))
         self.assertEqual("tasks", helpers.tasks_str(-10))
         self.assertEqual("tasks", helpers.tasks_str(42))
+
+    def test_get_first_doc_line(self):
+        expected_output = 'foo bar baz'
+        mock_obj = MagicMock(__doc__=f"""{expected_output} 
+        something else
+        
+        even more
+        """)
+        output = helpers.get_first_doc_line(mock_obj)
+        self.assertEqual(expected_output, output)
+
+    async def test_return_or_exception(self):
+        expected_output = '420'
+        mock_func = AsyncMock(return_value=expected_output)
+        args = (1, 3, 5)
+        kwargs = {'a': 1, 'b': 2, 'c': 'foo'}
+        output = await helpers.return_or_exception(mock_func, *args, **kwargs)
+        self.assertEqual(expected_output, output)
+        mock_func.assert_awaited_once_with(*args, **kwargs)
+
+        mock_func = MagicMock(return_value=expected_output)
+        output = await helpers.return_or_exception(mock_func, *args, **kwargs)
+        self.assertEqual(expected_output, output)
+        mock_func.assert_called_once_with(*args, **kwargs)
+
+        class TestException(Exception):
+            pass
+        test_exception = TestException()
+        mock_func = MagicMock(side_effect=test_exception)
+        output = await helpers.return_or_exception(mock_func, *args, **kwargs)
+        self.assertEqual(test_exception, output)
+        mock_func.assert_called_once_with(*args, **kwargs)