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DO YOU WANT TO TALK ABOUT UNIT TESTIG IN SWIFT? #itsat @daloog ¯\_(ϑ)_/¯ Alexey Demedetskiy Sigma Software
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THANK YOU APPLE!
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99% OF IOS APPS ARE SHIPPED WITH UNIT TESTING!
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WORKOUT TIME!!
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(˽°□°)˽Ɨ ˍʓˍ
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ARE UNIT TESTS WORTH IT? HTTP://STACKOVERFLOW.COM/QUESTIONS/237000/IS- THERE-HARD-EVIDENCE-OF-THE-ROI-OF-UNIT-TESTING
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TIME += 30% HTTP://COLLABORATION.CSC.NCSU.EDU/LAURIE/PAPERS/ TDDPAPERV8.PDF
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DEFECTS -= 60% HTTP://RESEARCH.MICROSOFT.COM/EN-US/GROUPS/ESE/ NAGAPPAN_TDD.PDF
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TESTS ARE GREAT!
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!(ಠፅಠ!)
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WHY WE ARE NOT RUBY?
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1) MARKET HUSTLE
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2) APPLE FRAMEWORKS
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3) LACK OF EXPERTISE
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4) OUTSOURCE
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⌛ ➡
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UNIT TESTS ARE WRITTEN BY DEVELOPERS.
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TESTS ARE DEVELOPERS RESPONSIBILITY
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DON’T SELL THEM WRITE THEM
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WHY DO WE NEED TO WRITE TESTS?
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1) REFACTORING
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2) CONFIDENCE
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3) CATCHING ERRORS
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4) REGRESSION
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➡❌➡⌨➡✅
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HOW TO WRITE TESTS?
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UNIT AS SMALLEST LOGIC CONTAINER
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FUNCTION
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INPUT ➡ OUTPUT
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PURE FUNCTIONS
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METHOD
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MUTATION OF STATE
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VOID ➡ VOID
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INPUT ➡ OUTPUT
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DOMAIN == CODOMAIN
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ALL MY CODE IS FUNCTIONAL, WHERE EVERY FUNCTION TAKES ONE ARGUMENT: ALL MY PROGRAM'S STATE.
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OBJECT
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DEPENDENCIES
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TRANSITIVE DEPENDENCIES
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INITIAL STATE
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ORDER OF OPERATIONS
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UNIT AS SMALLEST LOGIC CONTAINER
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TESTS
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GWT
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GIVEN WHEN THEN
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AAA
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ARRANGE ACT ASSERT
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SRV
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SETUP RECORD VERIFY
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FUNCTIONS - GWT
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METHODS - AAA
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OBJECTS - SRV
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VALUE TESTS
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BEHAVIOR TESTS
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INTEGRATION TESTS
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CLIENT TESTS
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PYRAMID OF TESTS HTTP://TODDLITTLEWEB.COM/WORDPRESS/2014/06/23/ THE-TESTING-DIAMOND-AND-THE-PYRAMID-2/
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TEST COVERAGE HTTP://MARTINFOWLER.COM/BLIKI/ TESTCOVERAGE.HTML
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TESTS
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SIDE EFFECTS
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RETURN VALUE
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FUNCTION CALL
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STATE CHANGE
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SIDE EFFECTS
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SWIFT
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DEPENDENCIES
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STRUCT
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INTERNAL
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PROTOCOL
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EXTERNAL
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XCTEST
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QUICK / NIMBLE HTTPS://GITHUB.COM/QUICK/QUICK
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RECORDER HTTPS://GIST.GITHUB.COM/ALEXEYDEMEDETSKIY/ 7A148559C81472A314F7
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SWIFT
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HTTPS://GITHUB.COM/XNEKOIX/FUNTIONALMVP
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HTTP://WWW.AMAZON.COM/WORKING-EFFECTIVELY- LEGACY-MICHAEL-FEATHERS/DP/0131177052
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HTTP://WWW.AMAZON.COM/EXTREME-PROGRAMMING- EXPLAINED-EMBRACE-EDITION/DP/0321278658
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QUESTIONS: @DALOOG
[email protected]
NOBIDON