def test_get_desired_instance_count_based_on_current_queue_length(
self, mock_boto3):
self.input_attrs['queues'] = ['queue1', 'queue2']
sqs_client = mock_boto3.client.return_value
sqs_client.get_queue_attributes.side_effect = [
{
'Attributes': {
'ApproximateNumberOfMessages': '400'
}
},
{
'Attributes': {
'ApproximateNumberOfMessages': '350'
}
},
]
sqs_scaler = SqsScaler(app_name, min_instances, max_instances,
**self.input_attrs)
sqs_scaler.statsd_client = Mock()
assert sqs_scaler._get_desired_instance_count_based_on_current_queue_length(
) == 3
calls = [
call("testqueue1.queue-length", 400),
call("testqueue2.queue-length", 350),
]
sqs_scaler.statsd_client.gauge.assert_has_calls(calls)
def test_sqs_client_initialization(self, mock_boto3):
self.input_attrs['queues'] = ['queue1', 'queue2']
mock_client = mock_boto3.client
sqs_scaler = SqsScaler(**self.input_attrs)
sqs_scaler.statsd_client = Mock()
assert sqs_scaler.sqs_client is None
sqs_scaler.get_desired_instance_count()
assert sqs_scaler.sqs_client == mock_client.return_value
mock_client.assert_called_with('sqs', region_name='eu-west-1')
def test_client_initialization(self, mock_boto3):
self.input_attrs['queues'] = ['queue1', 'queue2']
mock_client = mock_boto3.client
sqs_scaler = SqsScaler(app_name, min_instances, max_instances, **self.input_attrs)
sqs_scaler.statsd_client = Mock()
assert sqs_scaler.sqs_client is None
assert sqs_scaler.cloudwatch_client is None
sqs_scaler.get_desired_instance_count()
assert sqs_scaler.sqs_client == mock_client.return_value
assert sqs_scaler.cloudwatch_client == mock_client.return_value
calls = [
call('sqs', region_name='eu-west-1'),
call('cloudwatch', region_name='eu-west-1'),
]
for x in calls:
assert x in mock_client.call_args_list
