def test_add_stack(self, mock_trace):
     mock_trace.format_stack.return_value = ['foo', 'bar']
     assert jsonex.add_stack() == 'foobar'
 def test_add_stack(self, mock_trace):
     mock_trace.format_stack.return_value = ['foo', 'bar']
     assert jsonex.add_stack() == 'foobar'
 def test_add_stack(self, mock_trace):
     mock_trace.format_stack.return_value = ['foo', 'bar']
     mock_trace.format_exception.return_value = ['foo', 'bar']
     mock_trace.format_exc.return_value = ['foo', 'bar']
     assert jsonex.add_stack(Mock(__traceback__=None)) == 'foobar'