Consumer-Driven Contract Testing PACT

Sep 13, 2018Download as pptx, pdf2 likes1,391 views

This document discusses consumer-driven contract testing and introduces Pact, a testing framework that uses consumer-driven contracts. It poses four problems around evolving services without breaking clients. It then describes the basic flow of consumer-driven contracts where the consumer generates and shares a contract with the provider to test against. Pact enables evaluating contracts throughout a provider's development cycle to ensure fast, confident and less error-prone continuous delivery of services.

CONSUMER-DRIVEN
Contract Testing
PRAVITHA NAIR/SUNITA VENKATACHALAM
TARGET, BANGALORE

PROBLEM
STATEMENTS
1. How can something be added to a
service without breaking the clients?
2. How can something be removed
from a service without breaking the
clients?
3. How can a service developer find out
how clients are using their service?
4. How to enable short release cycles
and continuous delivery of services?

BasicFlowof a
Consumer
DrivenContract
CONSUMER
generates a Consumer
Driven Contract
PROVIDER works with
CONSUMER who re-
generates contract and code
PROVIDER changes code
that results in change in
contract ; contract breaks
CONSUMER shares
the generated contract
with the PROVIDER
PROVIDER includes
the Contract
Verification as part of
their unit test

PACT.io
Pact.io is a testing
framework that
evaluates CONSUMER
Contracts are satisfied
all through
development cycle of a
PROVIDER

WhyPACT?
 Confidence
 Continuously evolve your codebase
knowing that Pact will guarantee
Contracts are met.
 Faster
 No need to wait for integration testing in
end-to-end environments. No need for
manual testing.
 Less Error Prone
 Generation and verification of Contracts
are automatically managed by Pact.

The document discusses contract testing in software development. It begins with background on contract testing and describes the need for contract testing to validate assumptions about how code components collaborate. It then discusses different types of contracts, including explicit contracts defined by interfaces and implicit contracts assumed during testing. The document introduces the Pact framework for defining contracts between services and consumers through mock implementations. It emphasizes that contract testing supports independent deployment of services but is not a substitute for other types of testing or communication between teams.

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The document discusses implementing a scalable testing strategy for microservices using consumer-driven contract tests. It describes the testing pyramid concept of grouping tests into unit, integration, and acceptance categories. Consumer-driven contract tests involve defining interactions and behaviors in unit tests on both the consumer and provider sides. The document recommends the Pact tool for generating contracts from code and providing provider verification. It provides examples of implementing consumer-driven contract tests on both the consumer and provider sides and references additional resources on the topic.

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1. CONSUMER-DRIVEN Contract Testing PRAVITHA NAIR/SUNITA VENKATACHALAM TARGET, BANGALORE

2. PROBLEM STATEMENTS 1. How can something be added to a service without breaking the clients? 2. How can something be removed from a service without breaking the clients? 3. How can a service developer find out how clients are using their service? 4. How to enable short release cycles and continuous delivery of services?

3. Provider

4. Consumer

5. BasicFlowof a Consumer DrivenContract CONSUMER generates a Consumer Driven Contract PROVIDER works with CONSUMER who re- generates contract and code PROVIDER changes code that results in change in contract ; contract breaks CONSUMER shares the generated contract with the PROVIDER PROVIDER includes the Contract Verification as part of their unit test

6. PACT.io Pact.io is a testing framework that evaluates CONSUMER Contracts are satisfied all through development cycle of a PROVIDER

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8. WhyPACT?  Confidence  Continuously evolve your codebase knowing that Pact will guarantee Contracts are met.  Faster  No need to wait for integration testing in end-to-end environments. No need for manual testing.  Less Error Prone  Generation and verification of Contracts are automatically managed by Pact.

9. Questions?

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