def test_write_metrics_to_file_is_noop_with_no_metrics_directory(self,
path_, open_):
configuration = {'metrics_directory': None,
'metrics_file': None,
}
yrc = Receiver()
yrc.set_configuration(configuration)
yrc.write_metrics_to_file()
self.assertFalse(open_.called)
self.assertFalse(path_.called)
def test_write_metrics_to_file(self, path_, open_):
# initialize a receiver with given configuration
configuration = {'metrics_directory': '/tmp/metrics',
'metrics_file': '/tmp/metrics/yrc.metrics'
}
yrc = Receiver()
yrc.set_configuration(configuration)
open_.return_value = MagicMock(spec=file)
path_.return_value = True
yrc.write_metrics_to_file()
open_.assert_called_once_with('/tmp/metrics/yrc.metrics', 'w')
file_handle = open_.return_value.__enter__.return_value
file_handle.write.assert_called_once_with('foo=42\n')
