Download - End to End Testing: Bug Squashing for API Developers

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END TO END TESTING: BUG SQUASHING FOR API DEVELOPERS !

Ozan Seymen – Apigee Principal Architect Sean Davis – Apigee Technical Specialist

API Testing - Agenda

2 ©2016 Apigee. All Rights Reserved.

•  Popular testing methodologies •  API testing best practices •  Popular open source tools

Test Driven Development

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What is Test Driven Development?

• Understand the requirements • Write tests cases first (and let them fail!) • Write code to make tests pass • Refactor the code often


What is Test Driven Development?


Why use Test Driven Development?

•  Iterative development approach • Encourages thorough testing, ensuring “quality” • Tests are repeatable and can be automated • Confidence when iterating or refactoring legacy code


Challenges

• Requirements must be well understood by developer • Focus on unit testing • QA team test effort still high • Maintaining set of common test cases


Behavior Driven Development

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BDD


BDD is a software development process with TDD in its heart

BDD – a software development process




Business analyst

developer

tester



define / document

automated tests guide /

provide feedback on progress

specifications Use as basis of tests

3 Amigos

Developer

Tester

Business Analyst

BDD – Specifications

• Express using examples • Describe context, trigger and expected behaviour • Prioritize behaviours with business value


BDD – Gherkin


• When you come to document behavior, you need a language • Understood by humans and code • Gherkin - business readable, domain specific language

BDD – Given/When/Then


Feature: As an Employee I want to buy a coffee so that I wake up in the morning Scenario: Buy one coffee Given there is 1 coffee left in the machine And I have deposited 50p When I press the coffee button Then I should be served a coffee

BDD – Benefits of Gherkin


•  Documentation generation •  Executable specifications •  Tooling for editors •  Reusable snippets shared publicly •  Tools integration

Once you have standardized the language…

BDD – Tooling for Automated Testing


APICLI

YADDA

BDD Testing with Apickli

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github.com/apickli/apickli

•  apickli - REST API testing framework with cucumber.js •  Open source – no relationship to Apigee

©2016 Apigee. All Rights Reserved.

Mocking

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Mocking

• Target API availability – Network, ops, deployment, migrations, patches – Parallel development

• Constantly changing/unpredictable data • Simulation of certain scenarios for testing • When tests rely on previous data population – e.g. forgotten password

• High latency on target


Mocking

• API proxy – respond using policies • API proxy with node.js •  amok open source project - https://github.com/api-bucket/amok •  Import swagger and download server code from

http://editor.swagger.io/#/ • Other tools: – Mock Server – Wire Mock


API Proxy Testing – Environments


Environment Apigee Target Data Type of testing DEV/TEST Mock Target Data and behavior from mocks Full Integration INTG Actual Backend (DEV) Data and behavior from DEV build of

target APIs Partial Integration

PERF Actual Backend (DEV/PERF) Data and behavior from DEV or PERF build of target APIs

Performance

UAT Actual Backend (DEV/UAT) Data and behavior from DEV or UAT build of target APIs

Smoke

PRE Actual Backend (PROD) Data and behavior from target APIs in production

Smoke

PROD Actual Backend (PROD) Data and behavior from target APIs in production

Smoke

Smoke testing – API bundle deployed properly, access all target endpoints correctly, certificates deployed correctly, configuration is correct

Unit Testing

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API Proxy Testing


Do you think it is possible to test an Apigee proxy fully with integration testing?

No…

API Proxy Testing – Integration test enough?


Isolation/Coverage

API Proxy Testing – Integration test enough?


Test Runner Apigee Target Systems

3rd Party Service Callouts? Async? Complex code?

Unit Testing – Other benefits

• Code can be tested locally without deployment to Apigee first • Much faster than integration testing • Can create hooks to enforce testing during commit


Unit Testing – Boundary Principal


Test within your boundaries – don’t test libraries you don’t control

Unit Testing – Tooling


Unit Testing

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DEMO TIME!

Questions?

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Download - End to End Testing: Bug Squashing for API Developers

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