Lesson 1
The integration problem
Distributed teams can deploy independently while accidentally changing assumptions relied on by consumers.
All learning tracks
API & Integration QualityIntermediate 75 min
Consumer Contract Testing
Understand when consumer-driven contracts reduce integration risk and where they do not replace end-to-end testing.
ContractsIntegrationPact
Learning outcomes
Explain provider-consumer contracts
Identify breaking changes
Place contract tests in CI
Guided lessons
Learn the engineering thinking
Lesson 2
Consumer expectations
A contract captures the subset of provider behaviour that a specific consumer actually depends on.
Lesson 3
Provider verification
Verify contracts against provider implementations before incompatible changes reach shared environments.
Lesson 4
Versioning and compatibility
Use contracts to distinguish additive changes from changes that break existing consumers.
Lesson 5
What contracts do not prove
They do not validate complete workflows, performance, infrastructure, data quality or real downstream availability.
Hands-on practice
Do something with what you learned
Do not just tick these mentally. Write the query, create the test matrix, refactor the code, or document the decision. Practical evidence is the point.