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testland/sqs-tests

Tests AWS SQS queue interactions - Standard (at-least-once delivery, near-unlimited throughput) vs FIFO (exactly-once processing, ordered) queue semantics; visibility-timeout interaction model; dead-letter queue (DLQ) for poison-message isolation; message retention period (default 4 days, configurable 60s - 1209600s); test patterns via LocalStack or `aws-sdk-client-mock` (TypeScript) / `moto` (Python). Use when the user works with AWS SQS producers/consumers and needs unit/integration tests for queue interactions.

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Files

localstack-recipes.mdreferences/

SQS LocalStack recipes: DLQ routing and FIFO ordering

DLQ-routing and FIFO ordering/dedup recipes referenced from sqs-tests's SKILL.md (Step 6 and Step 7). Both run against LocalStack (or real SQS), not mocks. The mock-based unit tests and the visibility-timeout recipe stay in the main skill file.

DLQ routing

SQS supports dead-letter queues for poison-message isolation; after maxReceiveCount failed deliveries the message moves to the DLQ (per the SQS developer guide).

dlq_url = sqs.create_queue(QueueName='orders-dlq')['QueueUrl']
dlq_arn = sqs.get_queue_attributes(QueueUrl=dlq_url, AttributeNames=['QueueArn'])['Attributes']['QueueArn']

queue_url = sqs.create_queue(
    QueueName='orders',
    Attributes={
        'RedrivePolicy': json.dumps({'deadLetterTargetArn': dlq_arn, 'maxReceiveCount': 3}),
    },
)['QueueUrl']

sqs.send_message(QueueUrl=queue_url, MessageBody='poison')
for _ in range(4):
    msg = sqs.receive_message(QueueUrl=queue_url, VisibilityTimeout=0)
    # Don't delete; let visibility expire and re-receive

# After 3 receives, message is in DLQ:
dlq_msg = sqs.receive_message(QueueUrl=dlq_url)
assert dlq_msg['Messages'][0]['Body'] == 'poison'

FIFO ordering + dedup

fifo_url = sqs.create_queue(
    QueueName='orders.fifo',
    Attributes={'FifoQueue': 'true', 'ContentBasedDeduplication': 'true'},
)['QueueUrl']

sqs.send_message(QueueUrl=fifo_url, MessageBody='msg-1', MessageGroupId='group-A')
sqs.send_message(QueueUrl=fifo_url, MessageBody='msg-2', MessageGroupId='group-A')

# Same body within 5min dedup window -> second send is dropped:
sqs.send_message(QueueUrl=fifo_url, MessageBody='msg-1', MessageGroupId='group-A')

response = sqs.receive_message(QueueUrl=fifo_url, MaxNumberOfMessages=10)
bodies = [m['Body'] for m in response['Messages']]
assert bodies == ['msg-1', 'msg-2']  # Strict order; dedup applied

references

localstack-recipes.md

SKILL.md

tile.json