JS Software testing for beginners

December 05, 2022

53

JS Software testing for beginners

Lucas Santos

December 05, 2022

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Transcript

Software testing with JavaScript_ a quick guide
who am I_ {twitter, youtube, linkedin…}.lsantos.dev software engineer_ [email protected]
software testing
software tests are untested software that tests your software
why?
why automated testing? ➔ Improves software quality ➔ Prevent errors
before they're published ➔ Builds trust in the codebase ◆ Changes can be published faster
tests should be ➔ Deterministic ➔ Self-contained ➔ Predictable ➔
Small
What to test?
Functionality
What not to test?
Implementation
let's hack!
test runners_ giving us an edge on tests
let's hack!
test doubles_
Types of doubles ➔ Spies ◆ Adds instrumentation to a
function/object ◆ Actually calls the function but gathers metadata ➔ Stubs ◆ Replaces a function for a fake implementation ◆ Adds instrumentation ◆ Returns a ﬁxed value ➔ Mocks ◆ "Smarter" stubs ◆ Have predeﬁned expectations on interactions ◆ Focused on the interaction, not on behaviour
let's hack!
TDD Test Driven Development
None
thank you_ lsantos.dev