def test_default_error(mocker):
mocker.patch('collectd.error')
global CONFIGS
conf = MockConfig()
configure_callback(conf)
assert len(CONFIGS) == 0
collectd.error.assert_called_once_with('hadoop plugin error: *Host, Port, and Instance must be set.')
def assert_config(module_string, host, port, instance, instance_type):
conf = MockConfig(module_string)
configure_callback(conf)
assert len(CONFIGS) == 1
config = CONFIGS[0]
assert 'instance' in config
assert config['instance'] == instance
assert 'host' in config
assert config['host'] == host
assert 'port' in config
assert config['port'] == port
assert 'instance_type' in config
assert config['instance_type'] == instance_type