Hong Kong Python User Group

HKPUG x AWS Community Day Hong Kong 2026

Sat, Oct 24 · 9:30 AM CST

Hong Kong Institute of Professional Education - Lee Wai Lee, 3 King Ling Rd, Tseung Kwan O, New Territories, Hong Kong, Tseung Kwan O, HK

Hong Kong Python User Group is delighted to be invited as a supporting organization of AWS Community Day Hong Kong 2026!

Please note that registration on this User Group page does not grant venue access.

👉 Official Registration (Required):
https://www.eventbrite.hk/e/aws-community-day-hong-kong-2026-tickets-1996317792256

Event Date: 24-October-2026
Time: 09:30am - 05:00pm
Venue: IVE (Lee Wai Lee), 3 King Ling Road, MTR Tiu Keng Leng Station, Exit A2

Highlighted Session Details:

Your Workflow Passed—but Which Path Ran? Testing Step Functions with Floci and pytest
Time: 2:35 pm - 3:05 pm
Speakers:
• Sky Ng - Cloud Engineer, Hong Kong Economic Times
• Alex Au - Cloud Engineer, Contineo Limited

Language: English
Model: Talk (30 Mins)

Description:
A serverless workflow can have excellent Python test coverage and still double-charge a customer, skip compensation, or fail after resuming from a callback. Traditional line coverage tells us which statements executed, but it does not tell us whether every important workflow path behaved correctly.

In this code-first session, we will build an order-processing saga using AWS Step Functions, Python Lambda functions, DynamoDB, and SQS. Using Floci, Testcontainers, and pytest, we will execute the complete workflow locally through its public interface without mocking each AWS client.

We will inject transient failures, permanent failures, duplicate requests, and delayed callbacks. We will collect branch coverage from inside the Lambda containers and combine it with a second metric: workflow-path coverage derived from Step Functions execution history. This exposes untested retries, catch handlers, timeouts, and compensation paths that ordinary code coverage cannot see.

We will then examine how the same testing principles apply to AWS Lambda durable functions, where checkpointing and replay introduce additional requirements around determinism and idempotency.

Attendees will leave with a reusable pytest architecture, practical failure-injection patterns, and a testing strategy that balances fast local feedback with a smaller validation suite running in AWS.

📌 Important Notes for All Attendees

1️⃣ Registration Required for Entry
All participants must register on the official AWS Community Day Hong Kong 2026 site.
Venue access will only be granted to people who appear on the official attendee list.

2️⃣ First‑Come‑First‑Served (If Over Capacity)
In case of high demand, lunch tickets will be distributed on a first‑check‑in, first‑served basis.
Arrive early to secure your ticket.