Contract testing can be used to implement a scalable testing strategy for micro-services, allowing teams to deploy faster and with greater confidence.

2. Cork Software Crafters

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Web-app
to Service
Service to
Service

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12. Consumer
Real
Service
Test Double
Unit tests Contract tests

13. Consumer Provider
Consumer
Contracts
Test Double
Verify on providerRecord consumer
expectations
Unit tests Unit tests

15. Consumer A
Consumer B
Consumer C
Provider
Consumer-Driven
Contract
{ Id: 100,
name: “A task” }
{ Id: 100,
name: “A task”
expedite: true }
{ Id: 100,
duration: 20 }
{ Id: 100,
name: “A task”,
expedite: true,
duration: 20 }
Consumer Contract A
Consumer Contract B
Consumer Contract C

18. Scope of Contract Testing in the overall
testing strategy

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https://docs.pact.io/documentation/what_is_pact_good_for.html

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22. Consumer
Contracts
Provider
Contract
Tests
1) Define expected interactions
2) Tests the API Client
code on the consumer
Provider
Contract
Tests
Consumer
Contract
Tests
4) Generates contracts
Consumer
API Client
Pact Mock
Service
3) Verify interactions

25. Consumer
Contracts
Provider
A
P
I
Provider
Contract
Tests
1) Pact auto-generates provider tests
3) Tests the provider
Provider
Contract
Tests
Provider
Contract
Tests
2) Set-up provider state

34. // Expected Interaction
provider.addInteraction({
state: 'a task with id task-id exists',
uponReceiving: 'a request to delete task task-id',
withRequest: {method: 'DELETE', path: '/tasks/task-id'},
willRespondWith: {status: 204}
});

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40. plugins {
id("au.com.dius.pact") version "4.1.0"
}
pact {
publish {
pactBrokerUrl = "http://localhost:9292"
}
}

43. pact.verifier.publishResults=true

47. plugins {
id("au.com.dius.pact") version "4.1.0"
}
pact {
broker {
pactBrokerUrl = "http://localhost:9292"
}
}

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