REST API-LEVEL TDD With Nodejs
REST API-LEVEL TDD With NodejsDang Viet Ha @ Tech Talk #2, Hanoi
2016
agendaWhat is TDD?The Benefits and Limitations of TDDCommon
Pitfalls of TDDREST-API TDD with Node.jsDemoQuestion?
What is TDD?TDD: Test Driven Development refers to a style of
programming in which three activities are tightly
interwovenCodingTesting (Unit Test)Design (Refactoring)Basic
Philosophywrite a "single" unit test describing an aspect of the
programrun the test, which should fail because the program lacks
that featurewrite "just enough" code, the simplest possible, to
make the test pass"refactor" the code until it conforms to the
simplicity criteriarepeat, "accumulating" unit tests over time
What is TDD?
The Benefits and Limitations BenefitsWriting tests first require
you to really consider what you want from the codeShort feedback
loopReduced time in reworkLess time spent in the
debuggerSimplification & Loose Coupling (DI)Improves quality
and reduces bugs LimitationsBigger up-front costSome codes are
difficult to write the test.Focus on micro-design not
macro-designNeed to use mock to reproduce the real world.Cannot
cover all functional testing (UI, DB, Network,)
Common PitfallsIndividual mistakesForgetting to run tests
frequentlyWriting too many tests at onceWriting tests that are too
large or coarse-grainedWriting overly trivial tests, for instance
omitting assertionsWriting tests for trivial code, for instance
assessorsTeam pitfallsPartial adoption - only a few developers on
the team use TDDPoor maintenance of the test suite - most commonly
leading to a test suite with a prohibitively long running
timeAbandoned test suite (i.e. seldom or never run) - sometimes as
a result of poor maintenance, sometimes as a result of team
turnover
REST-API TDD with Node.jsREST-API: Express and
MongooseAuthorization: PassportDependencies Injection: WagnerTest
framework: MochaValidation & Assertion: AssertHTTP Request:
Super-AgentTest And Watch task running: Gulp
REST-API
Mocha
Mocha
MOCHA
GULP TASK
DEMO
DEMO
DEMO
DEMO
DEMO
Q&A
