def test_dispatch_stat_no_value(mocker):
mocker.patch('collectd.warning')
mocker.patch('collectd.Values')
dispatch_stat('gauge', 'doesntmatter', None, 'doesntmatter', 'doesntmatter', False)
collectd.Values.assert_not_called()
collectd.warning.assert_called_once_with('hadoop plugin: Value not found for doesntmatter')
def test_dispatch_stat_happy_path(mocker):
value_mock = mock.Mock()
mocker.patch('collectd.Values', return_value=value_mock)
dispatch_stat('gauge', 'Threading.mymetric', 99, 'myinstance', 'namenode', True)
assert value_mock.type == 'gauge'
assert value_mock.type_instance == 'Threading.mymetric'
assert value_mock.values == [99]
assert value_mock.plugin_instance == 'myinstance.namenode'
assert value_mock.meta == {'0': True}
value_mock.dispatch.assert_called_once_with()
