{"id":542,"date":"2018-04-25T15:30:29","date_gmt":"2018-04-25T13:30:29","guid":{"rendered":"https:\/\/glancu.com\/blog\/?p=542"},"modified":"2018-06-15T22:10:29","modified_gmt":"2018-06-15T20:10:29","slug":"test-driven-development","status":"publish","type":"post","link":"https:\/\/glancu.com\/blog\/test-driven-development\/","title":{"rendered":"Test Driven Development"},"content":{"rendered":"

Cze\u015b\u0107. Dzisiaj powiem Ci, czym jest TDD – Test Driven Development. Zapraszam!<\/p>\n

<\/p>\n

Czym jest TDD?<\/h3>\n
\n
Test-driven development (TDD) \u2013 technika tworzenia oprogramowania, zaliczana do metodyk zwinnych. Pierwotnie by\u0142a cz\u0119\u015bci\u0105 programowania ekstremalnego (ang. extreme programming), lecz obecnie stanowi samodzieln\u0105 technik\u0119.<\/h5>\n<\/blockquote>\n

\u0179r\u00f3d\u0142o<\/strong>:\u00a0https:\/\/pl.wikipedia.org\/wiki\/Test-driven_development<\/a><\/p>\n

Czyli w skr\u00f3cie, jest to technika, w kt\u00f3rej piszemy unit testy wraz z kodem produkcyjnym. Warto zaznaczy\u0107, \u017ce na samym pocz\u0105tku piszemy unit test, a dopiero p\u00f3\u017aniej kod produkcyjny.<\/p>\n

Dlaczego w taki spos\u00f3b?<\/strong><\/p>\n

Poniewa\u017c napiszemy test, kt\u00f3ry musi spe\u0142nia\u0107 okre\u015blone wymagania, a dopiero potem test produkcyjny w taki spos\u00f3b, \u017ceby te wymagania spe\u0142nia\u0142, czyli dzia\u0142a\u0142 zgodnie z za\u0142o\u017ceniami.<\/p>\n

Fazy TDD<\/h3>\n

TDD jest podzielony na trzy fazy:<\/p>\n

    \n
  1. Piszemy test jednostkowy, kt\u00f3ry b\u0119dzie testowa\u0142 funkcjonalno\u015b\u0107, kt\u00f3ra jeszcze nie istnieje. Mo\u017ce zdarzy\u0107 si\u0119 sytuacja, w kt\u00f3rej kod nawet nie b\u0119dzie si\u0119 kompilowa\u0142, poniewa\u017c odnosimy si\u0119 do metody, kt\u00f3ra jeszcze nie istnieje.<\/li>\n
  2. Piszemy kod produkcyjny, zgodnie z za\u0142o\u017ceniami. Kod nie musi by\u0107 idealny, poniewa\u017c chodzi tutaj o fakt stworzenia kodu, kt\u00f3ry pokryje test napisany przed chwil\u0105. Je\u017celi kod napisany, to pozostaje tylko uruchomi\u0107 unit test i sprawdzi\u0107, czy faktycznie wszystko przechodzi, tak jak powinno.<\/li>\n
  3. Ostatnia faza to refaktoryzacja samego kodu. Innymi s\u0142owy, chodzi o to, \u017ceby kod by\u0142 w jeszcze lepszym stanie, ni\u017c po napisaniu go na potrzeby przechodzenia unit test\u00f3w. Przyk\u0142adem takiego czyszczenia mo\u017ce by\u0107 napisane osobnej metody, kt\u00f3ra pozb\u0119dzie si\u0119 powtarzania tego samego kodu.<\/li>\n<\/ol>\n

    Jak widzisz, s\u0105 trzy fazy, kt\u00f3re nie wygl\u0105daj\u0105 zbyt skomplikowanie od strony pisania ich. Dzi\u0119ki pisaniu w taki spos\u00f3b mo\u017cesz czu\u0107 si\u0119 swobodniej podczas aktualizowania istniej\u0105cego kodu, kt\u00f3ry jest ju\u017c na produkcji.<\/p>\n

    Pami\u0119taj!<\/h3>\n

    Podczas sko\u0144czenia refaktoryzacji oraz pisania test\u00f3w, nie zapominaj o uruchamianiu wszystkich test\u00f3w jednostkowych. Dlaczego? Odpowied\u017a jest banalna, poniewa\u017c mo\u017ce zdarzy\u0107 si\u0119 tak, \u017ce w jaki\u015b spos\u00f3b „ma\u0142a zmiana” mo\u017ce powodowa\u0107 b\u0142\u0119dy w innej cz\u0119\u015bci aplikacji, kt\u00f3r\u0105 nie bierzesz pod uwag\u0119. Dlatego nie zapominaj i uruchamiaj wszystkie testy!<\/p>\n<\/div>","protected":false},"excerpt":{"rendered":"

    Cze\u015b\u0107. Dzisiaj powiem Ci, czym jest TDD – Test Driven Development. Zapraszam!<\/div>\n","protected":false},"author":31241,"featured_media":577,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_mi_skip_tracking":false,"_exactmetrics_sitenote_active":false,"_exactmetrics_sitenote_note":"","_exactmetrics_sitenote_category":0,"footnotes":""},"categories":[261],"tags":[244,243,241,242],"class_list":["post-542","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-web","tag-development","tag-driven","tag-tdd","tag-test"],"better_featured_image":{"id":577,"alt_text":"test driven development","caption":"","description":"","media_type":"image","media_details":{"width":2048,"height":1365,"file":"2018\/05\/test-driven-development.png","sizes":{"thumbnail":{"file":"test-driven-development-440x290.png","width":440,"height":290,"mime-type":"image\/png","source_url":"https:\/\/glancu.com\/blog\/wp-content\/uploads\/2018\/05\/test-driven-development-440x290.png"},"medium":{"file":"test-driven-development-300x200.png","width":300,"height":200,"mime-type":"image\/png","source_url":"https:\/\/glancu.com\/blog\/wp-content\/uploads\/2018\/05\/test-driven-development-300x200.png"},"medium_large":{"file":"test-driven-development-768x512.png","width":768,"height":512,"mime-type":"image\/png","source_url":"https:\/\/glancu.com\/blog\/wp-content\/uploads\/2018\/05\/test-driven-development-768x512.png"},"large":{"file":"test-driven-development-1100x733.png","width":1100,"height":733,"mime-type":"image\/png","source_url":"https:\/\/glancu.com\/blog\/wp-content\/uploads\/2018\/05\/test-driven-development-1100x733.png"},"gazana_hd":{"file":"test-driven-development-1920x1280.png","width":1920,"height":1280,"mime-type":"image\/png","source_url":"https:\/\/glancu.com\/blog\/wp-content\/uploads\/2018\/05\/test-driven-development-1920x1280.png"},"gazana_standard":{"file":"test-driven-development-1100x640.png","width":1100,"height":640,"mime-type":"image\/png","source_url":"https:\/\/glancu.com\/blog\/wp-content\/uploads\/2018\/05\/test-driven-development-1100x640.png"},"gazana_square":{"file":"test-driven-development-1100x1100.png","width":1100,"height":1100,"mime-type":"image\/png","source_url":"https:\/\/glancu.com\/blog\/wp-content\/uploads\/2018\/05\/test-driven-development-1100x1100.png"},"gazana_grid":{"file":"test-driven-development-530x380.png","width":530,"height":380,"mime-type":"image\/png","source_url":"https:\/\/glancu.com\/blog\/wp-content\/uploads\/2018\/05\/test-driven-development-530x380.png"},"gazana_list":{"file":"test-driven-development-530x640.png","width":530,"height":640,"mime-type":"image\/png","source_url":"https:\/\/glancu.com\/blog\/wp-content\/uploads\/2018\/05\/test-driven-development-530x640.png"},"gazana_masonry":{"file":"test-driven-development-530x353.png","width":530,"height":353,"mime-type":"image\/png","source_url":"https:\/\/glancu.com\/blog\/wp-content\/uploads\/2018\/05\/test-driven-development-530x353.png"},"gazana_mini":{"file":"test-driven-development-100x100.png","width":100,"height":100,"mime-type":"image\/png","source_url":"https:\/\/glancu.com\/blog\/wp-content\/uploads\/2018\/05\/test-driven-development-100x100.png"}},"image_meta":{"aperture":"0","credit":"","camera":"","caption":"","created_timestamp":"0","copyright":"","focal_length":"0","iso":"0","shutter_speed":"0","title":"","orientation":"0","keywords":[]}},"post":546,"source_url":"https:\/\/glancu.com\/blog\/wp-content\/uploads\/2018\/05\/test-driven-development.png"},"aioseo_notices":[],"aioseo_head":"\n\t\t\n\t\n\t\n\t\n\t\n\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t