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Pact Maven + Springboot + JUnit5 workshop

Introduction

This workshop is aimed at demonstrating core features and benefits of contract testing with Pact.

Whilst contract testing can be applied retrospectively to systems, we will follow the consumer driven contracts approach in this workshop - where a new consumer and provider are created in parallel to evolve a service over time, especially where there is some uncertainty with what is to be built.

This workshop should take from 1 to 2 hours, depending on how deep you want to go into each topic.

Workshop outline:

• step 1: create consumer: Create our consumer before the Provider API even exists
• step 2: unit test: Write a unit test for our consumer
• step 3: pact test: Write a Pact test for our consumer
• step 4: pact verification: Verify the consumer pact with the Provider API
• step 5: fix consumer: Fix the consumer's bad assumptions about the Provider
• step 6: pact test: Write a pact test for 404 (missing User) in consumer
• step 7: provider states: Update API to handle 404 case
• step 8: pact test: Write a pact test for the 401 case
• step 9: pact test: Update API to handle 401 case
• step 10: request filters: Fix the provider to support the 401 case
• step 11: pact broker: Implement a broker workflow for integration with CI/CD

NOTE: Each step is tied to, and must be run within, a git branch, allowing you to progress through each stage incrementally. For example, to move to step 2 run the following: git checkout step2

Learning objectives

If running this as a team workshop format, you may want to take a look through the learning objectives.

Requirements

• JDK 8 or above
• Maven 3
• Docker for step 11

Scenario

There are two components in scope for our workshop.

1. Product Catalog website. It provides an interface to query the Product service for product information.
2. Product Service (Provider). Provides useful things about products, such as listing all products and getting the details of an individual product.

Start

Start at step 1