def test_should_not_write_anything_when_no_metrics_given(self):
mock_file = Mock()
metrics = {}
_write_metrics(metrics, mock_file)
self.assertFalse(mock_file.write.called)
def test_should_write_metrics(self):
mock_file = Mock()
metrics = {
"metric1": 21,
"metric2": 42
}
_write_metrics(metrics, mock_file)
self.assertEquals(mock_file.write.call_args_list,
[call('metric2=42\n'),
call('metric1=21\n')])
