def test_failed_to_collect_metrics():
config = InstanceConfig(
{"ip_address": "127.0.0.123", "community_string": "public", "metrics": [{"OID": "1.2.3", "name": "foo"}]}
)
instance = common.generate_instance_config(common.SUPPORTED_METRIC_TYPES)
instance.pop('ip_address')
instance['network_address'] = '192.168.0.0/24'
check = SnmpCheck('snmp', {}, [instance])
check.fetch_results = mock.Mock(return_value=ValueError("invalid value"))
check._check_with_config(config)
assert len(check.warnings) == 1
assert 'Failed to collect metrics for 127.0.0.123' in check.warnings[0]
