'Providing custom tags should add them as is on the gauge call'

def test_submit_metric_gauge_with_custom_tags(self):

    tags = ['env:dev', 'app:my_pretty_app']
    self.check._submit_metric(self.check.metrics_mapper[self.ref_gauge.name], self.ref_gauge, custom_tags=tags)
    self.check.gauge.assert_called_with('prometheus.process.vm.bytes', 39211008.0, ['env:dev', 'app:my_pretty_app'])
