{"id":7631,"date":"2024-12-25T11:15:13","date_gmt":"2024-12-25T08:15:13","guid":{"rendered":"https:\/\/fatihsoysal.com\/blog\/express-js-uygulamalari-icin-birim-testleri-yazma-yeni-baslayanlar-icin-kilavuz\/"},"modified":"2024-12-25T11:15:13","modified_gmt":"2024-12-25T08:15:13","slug":"express-js-uygulamalari-icin-birim-testleri-yazma-yeni-baslayanlar-icin-kilavuz","status":"publish","type":"post","link":"https:\/\/fatihsoysal.com\/blog\/express-js-uygulamalari-icin-birim-testleri-yazma-yeni-baslayanlar-icin-kilavuz\/","title":{"rendered":"Express.js Uygulamalar\u0131 \u0130\u00e7in Birim Testleri Yazma: Yeni Ba\u015flayanlar \u0130\u00e7in K\u0131lavuz"},"content":{"rendered":"<p><body><\/p>\n<p>Express.js Uygulamalar\u0131 \u0130\u00e7in Birim Testleri Yazma: Yeni Ba\u015flayanlar \u0130\u00e7in K\u0131lavuz<\/p>\n<p>Merhaba! Fatih Soysal olarak, Express.js uygulamalar\u0131n\u0131z i\u00e7in sa\u011flam ve etkili birim testleri yazma konusunda size yard\u0131mc\u0131 olmak i\u00e7in buraday\u0131m.  Birim testleri, kodunuzun k\u00fc\u00e7\u00fck par\u00e7alar\u0131n\u0131n beklendi\u011fi gibi \u00e7al\u0131\u015ft\u0131\u011f\u0131ndan emin olman\u0131n harika bir yoludur.  Bu sayede,  b\u00fcy\u00fck hatalar\u0131 \u00f6nleyebilir ve gelecekteki geli\u015ftirmeleri kolayla\u015ft\u0131rabilirsiniz.  Bu rehberde, yeni ba\u015flayanlar i\u00e7in ad\u0131m ad\u0131m bir yakla\u015f\u0131mla, Express.js uygulamalar\u0131n\u0131z i\u00e7in etkili birim testleri nas\u0131l yazaca\u011f\u0131n\u0131z\u0131 \u00f6\u011freneceksiniz.<\/p>\n<h2>Neden Birim Testleri \u00d6nemlidir?<\/h2>\n<p>\u00d6ncelikle, birim testlerinin \u00f6nemini vurgulamakta fayda var.  <strong>Zaman kazand\u0131r\u0131rlar<\/strong>. K\u00fc\u00e7\u00fck hatalar\u0131 erken a\u015famada yakalaman\u0131z\u0131 sa\u011flarlar, b\u00f6ylece daha b\u00fcy\u00fck sorunlar\u0131n \u00f6n\u00fcne ge\u00e7ersiniz.  <strong>Kod kalitenizi art\u0131r\u0131rlar<\/strong>. Daha temiz, daha okunabilir ve daha s\u00fcrd\u00fcr\u00fclebilir kod yazman\u0131za yard\u0131mc\u0131 olurlar. Sonu\u00e7 olarak, <strong>g\u00fcvenilir yaz\u0131l\u0131mlar<\/strong> geli\u015ftirmenize olanak tan\u0131rlar.  De\u011fi\u015fiklik yapt\u0131\u011f\u0131n\u0131zda, testleriniz sayesinde beklenmedik sorunlarla kar\u015f\u0131la\u015fma olas\u0131l\u0131\u011f\u0131n\u0131z azal\u0131r.<\/p>\n<h2>Gereksinimler<\/h2>\n<p>Ba\u015flamadan \u00f6nce, birka\u00e7 k\u00fct\u00fcphaneye ihtiyac\u0131m\u0131z var.  Bunlar, testleri \u00e7al\u0131\u015ft\u0131rmak ve do\u011frulamalar yapmak i\u00e7in kullanaca\u011f\u0131m\u0131z ara\u00e7lard\u0131r.  \u0130\u015fte gerekli olanlar:<\/p>\n<ul>\n<li><strong>Mocha:<\/strong> Test \u00e7al\u0131\u015ft\u0131r\u0131c\u0131m\u0131z. <\/li>\n<li><strong>Chai:<\/strong> Do\u011frulama k\u00fct\u00fcphanesi.  Beklentilerimizi kontrol etmemizi sa\u011flar.<\/li>\n<li><strong>Supertest:<\/strong>  HTTP isteklerini sim\u00fcle etmek i\u00e7in kullanaca\u011f\u0131m\u0131z k\u00fct\u00fcphane.<\/li>\n<\/ul>\n<p>Bu k\u00fct\u00fcphaneleri, projenizin k\u00f6k dizininde bulunan <code>package.json<\/code> dosyan\u0131zdaki <code>devDependencies<\/code> b\u00f6l\u00fcm\u00fcne ekleyebilirsiniz.  \u00d6rne\u011fin:<\/p>\n<pre><code class=\"language-json\">\n{\n  \"devDependencies\": {\n    \"mocha\": \"^10.2.0\",\n    \"chai\": \"^4.3.7\",\n    \"supertest\": \"^6.3.3\"\n  }\n}\n<\/code><\/pre>\n<p>Daha sonra,  <code>npm install<\/code> komutunu \u00e7al\u0131\u015ft\u0131rarak bu k\u00fct\u00fcphaneleri y\u00fckleyebilirsiniz.<\/p>\n<h2>Basit Bir Express.js Uygulamas\u0131<\/h2>\n<p>\u015eimdi, basit bir Express.js uygulamas\u0131 olu\u015ftural\u0131m. Bu uygulama,  bir GET iste\u011fine yan\u0131t olarak &#8220;Merhaba D\u00fcnya!&#8221; mesaj\u0131n\u0131 g\u00f6nderecektir.<\/p>\n<pre><code class=\"language-javascript\">\nconst express = require('express');\nconst app = express();\nconst port = 3000;\n\napp.get('\/', (req, res) => {\n  res.send('Merhaba D\u00fcnya!');\n});\n\napp.listen(port, () => {\n  console.log(Sunucu ${port} portunda \u00e7al\u0131\u015f\u0131yor.);\n});\n<\/code><\/pre>\n<h2>Birim Testinin Yaz\u0131m\u0131<\/h2>\n<p>\u015eimdi,  bu basit uygulaman\u0131n bir birim testini yazal\u0131m.  Bu test,  k\u00f6k dizinine yap\u0131lan bir GET iste\u011finin &#8220;Merhaba D\u00fcnya!&#8221; mesaj\u0131n\u0131 d\u00f6nd\u00fcrd\u00fc\u011f\u00fcn\u00fc do\u011frulayacakt\u0131r.<\/p>\n<pre><code class=\"language-javascript\">\nconst request = require('supertest');\nconst app = require('..\/app'); \/\/ Uygulaman\u0131z\u0131 burada import edin.\nconst expect = require('chai').expect;\n\ndescribe('GET \/', () => {\n  it('Merhaba D\u00fcnya! mesaj\u0131n\u0131 d\u00f6nd\u00fcrmelidir', (done) => {\n    request(app)\n      .get('\/')\n      .expect(200)\n      .expect('Merhaba D\u00fcnya!')\n      .end((err, res) => {\n        if (err) return done(err);\n        done();\n      });\n  });\n});\n<\/code><\/pre>\n<p>Bu testte, <code>supertest<\/code> k\u00fct\u00fcphanesini kullanarak bir GET iste\u011fi g\u00f6nderiyoruz.  <code>expect<\/code> fonksiyonu ile durum kodunun (200) ve yan\u0131t\u0131n (&#8220;Merhaba D\u00fcnya!&#8221;) do\u011fru oldu\u011funu do\u011fruluyoruz.  <code>done()<\/code> fonksiyonu, testin tamamland\u0131\u011f\u0131n\u0131 belirtir.<\/p>\n<p>Bu test dosyas\u0131n\u0131 (\u00f6rne\u011fin, test.js) olu\u015fturduktan sonra, komut sat\u0131r\u0131ndan mocha komutunu \u00e7al\u0131\u015ft\u0131rarak testleri \u00e7al\u0131\u015ft\u0131rabilirsiniz.<\/p>\n<h2>Daha Geli\u015fmi\u015f Senaryolar<\/h2>\n<p>Bu basit \u00f6rnek, birim testlerinin temellerini g\u00f6stermektedir.  Daha karma\u015f\u0131k uygulamalar i\u00e7in, daha fazla test senaryosu yazman\u0131z gerekecektir.  \u00d6rne\u011fin, POST, PUT, DELETE gibi farkl\u0131 HTTP isteklerini test edebilir ve farkl\u0131 yan\u0131tlar\u0131 do\u011frulayabilirsiniz.  Ayr\u0131ca, veri taban\u0131yla etkile\u015fim kuran fonksiyonlar i\u00e7in mock verileri kullanarak testler yazabilirsiniz.  Bununla birlikte,  daha b\u00fcy\u00fck uygulamalarda, testlerinizi organize etmek i\u00e7in daha yap\u0131land\u0131r\u0131lm\u0131\u015f bir yakla\u015f\u0131m kullanman\u0131z gerekebilir.<\/p>\n<h2>Sonu\u00e7<\/h2>\n<p>Bu rehberde,  Express.js uygulamalar\u0131 i\u00e7in birim testleri yazman\u0131n temellerini ele ald\u0131k.  Birim testleri, yaz\u0131l\u0131m geli\u015ftirme s\u00fcrecinizde \u00f6nemli bir rol oynar.  Bu rehberdeki bilgileri kullanarak, daha g\u00fcvenilir ve s\u00fcrd\u00fcr\u00fclebilir uygulamalar geli\u015ftirebilirsiniz.  Daha fazla bilgi i\u00e7in <a href=\"https:\/\/fatihsoysal.com\">fatihsoysal.com<\/a> adresini ziyaret edebilirsiniz.  Ayr\u0131ca,  konuyla ilgili daha detayl\u0131 bilgi edinmek i\u00e7in <a href=\"https:\/\/mochajs.org\/\">Mocha<\/a> ve <a href=\"https:\/\/www.chaijs.com\/\">Chai<\/a> dok\u00fcmanlar\u0131n\u0131 inceleyebilirsiniz. <\/p>\n<p>#Etiketler: Express.js, birim testi, unit testing, javascript, node.js, test, mocha, chai, supertest,  fatihsoysal.com<\/p>\n<p><\/body><br \/>\n<\/html><\/p>\n","protected":false},"excerpt":{"rendered":"Express.js Uygulamalar\u0131 \u0130\u00e7in Birim Testleri Yazma: Yeni Ba\u015flayanlar \u0130\u00e7in K\u0131lavuz Merhaba! Fatih Soysal olarak, Express.js uygulamalar\u0131n\u0131z i\u00e7in sa\u011flam&hellip;","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"csco_page_header_type":"","csco_page_load_nextpost":"","csco_page_subscribe_form":"","csco_page_contact_form":"","footnotes":""},"categories":[1],"tags":[],"class_list":{"0":"post-7631","1":"post","2":"type-post","3":"status-publish","4":"format-standard","6":"category-genel","7":"cs-entry","8":"cs-video-wrap"},"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v20.5 (Yoast SEO v25.3.1) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Express.js Uygulamalar\u0131 \u0130\u00e7in Birim Testleri Yazma: Yeni Ba\u015flayanlar \u0130\u00e7in K\u0131lavuz<\/title>\n<meta name=\"description\" content=\"Merhaba! Fatih Soysal olarak, Express.js uygulamalar\u0131n\u0131z i\u00e7in sa\u011flam ve etkili birim testleri yazma konusunda size yard\u0131mc\u0131 olmak i\u00e7in buraday\u0131m. Birim testleri, kodunuzun k\u00fc\u00e7\u00fck par\u00e7alar\u0131n\u0131n beklendi\u011fi gibi \u00e7al\u0131\u015ft\u0131\u011f\u0131ndan emin olman\u0131n harika bir yoludur. Bu sayede, b\u00fcy\u00fck hatalar\u0131 \u00f6nleyebilir ve gelecekteki geli\u015ftirmeleri kolayla\u015ft\u0131rabilirsiniz. Bu rehberde, yeni ba\u015flayanlar i\u00e7in ad\u0131m ad\u0131m bir yakla\u015f\u0131mla, Express.js uygulamalar\u0131n\u0131z i\u00e7in etkili birim testleri nas\u0131l yazaca\u011f\u0131n\u0131z\u0131 \u00f6\u011freneceksiniz.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/fatihsoysal.com\/blog\/express-js-uygulamalari-icin-birim-testleri-yazma-yeni-baslayanlar-icin-kilavuz\/\" \/>\n<meta property=\"og:locale\" content=\"tr_TR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Express.js Uygulamalar\u0131 \u0130\u00e7in Birim Testleri Yazma: Yeni Ba\u015flayanlar \u0130\u00e7in K\u0131lavuz\" \/>\n<meta property=\"og:description\" content=\"Merhaba! Fatih Soysal olarak, Express.js uygulamalar\u0131n\u0131z i\u00e7in sa\u011flam ve etkili birim testleri yazma konusunda size yard\u0131mc\u0131 olmak i\u00e7in buraday\u0131m. Birim testleri, kodunuzun k\u00fc\u00e7\u00fck par\u00e7alar\u0131n\u0131n beklendi\u011fi gibi \u00e7al\u0131\u015ft\u0131\u011f\u0131ndan emin olman\u0131n harika bir yoludur. Bu sayede, b\u00fcy\u00fck hatalar\u0131 \u00f6nleyebilir ve gelecekteki geli\u015ftirmeleri kolayla\u015ft\u0131rabilirsiniz. Bu rehberde, yeni ba\u015flayanlar i\u00e7in ad\u0131m ad\u0131m bir yakla\u015f\u0131mla, Express.js uygulamalar\u0131n\u0131z i\u00e7in etkili birim testleri nas\u0131l yazaca\u011f\u0131n\u0131z\u0131 \u00f6\u011freneceksiniz.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/fatihsoysal.com\/blog\/express-js-uygulamalari-icin-birim-testleri-yazma-yeni-baslayanlar-icin-kilavuz\/\" \/>\n<meta property=\"og:site_name\" content=\"Kodlar\u0131n Gizemli D\u00fcnyas\u0131\" \/>\n<meta property=\"article:published_time\" content=\"2024-12-25T08:15:13+00:00\" \/>\n<meta name=\"author\" content=\"Fatih Soysal\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Yazan:\" \/>\n\t<meta name=\"twitter:data1\" content=\"Fatih Soysal\" \/>\n\t<meta name=\"twitter:label2\" content=\"Tahmini okuma s\u00fcresi\" \/>\n\t<meta name=\"twitter:data2\" content=\"3 dakika\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/fatihsoysal.com\/blog\/express-js-uygulamalari-icin-birim-testleri-yazma-yeni-baslayanlar-icin-kilavuz\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/fatihsoysal.com\/blog\/express-js-uygulamalari-icin-birim-testleri-yazma-yeni-baslayanlar-icin-kilavuz\/\"},\"author\":{\"name\":\"Fatih Soysal\",\"@id\":\"https:\/\/fatihsoysal.com\/blog\/#\/schema\/person\/002a254750921dcfd568a99e48240dd1\"},\"headline\":\"Express.js Uygulamalar\u0131 \u0130\u00e7in Birim Testleri Yazma: Yeni Ba\u015flayanlar \u0130\u00e7in K\u0131lavuz\",\"datePublished\":\"2024-12-25T08:15:13+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/fatihsoysal.com\/blog\/express-js-uygulamalari-icin-birim-testleri-yazma-yeni-baslayanlar-icin-kilavuz\/\"},\"wordCount\":595,\"commentCount\":0,\"publisher\":{\"@id\":\"https:\/\/fatihsoysal.com\/blog\/#\/schema\/person\/002a254750921dcfd568a99e48240dd1\"},\"inLanguage\":\"tr\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\/\/fatihsoysal.com\/blog\/express-js-uygulamalari-icin-birim-testleri-yazma-yeni-baslayanlar-icin-kilavuz\/#respond\"]}],\"copyrightYear\":\"2024\",\"copyrightHolder\":{\"@id\":\"https:\/\/fatihsoysal.com\/blog\/#organization\"}},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/fatihsoysal.com\/blog\/express-js-uygulamalari-icin-birim-testleri-yazma-yeni-baslayanlar-icin-kilavuz\/\",\"url\":\"https:\/\/fatihsoysal.com\/blog\/express-js-uygulamalari-icin-birim-testleri-yazma-yeni-baslayanlar-icin-kilavuz\/\",\"name\":\"Express.js Uygulamalar\u0131 \u0130\u00e7in Birim Testleri Yazma: Yeni Ba\u015flayanlar \u0130\u00e7in K\u0131lavuz\",\"isPartOf\":{\"@id\":\"https:\/\/fatihsoysal.com\/blog\/#website\"},\"datePublished\":\"2024-12-25T08:15:13+00:00\",\"description\":\"Merhaba! Fatih Soysal olarak, Express.js uygulamalar\u0131n\u0131z i\u00e7in sa\u011flam ve etkili birim testleri yazma konusunda size yard\u0131mc\u0131 olmak i\u00e7in buraday\u0131m. Birim testleri, kodunuzun k\u00fc\u00e7\u00fck par\u00e7alar\u0131n\u0131n beklendi\u011fi gibi \u00e7al\u0131\u015ft\u0131\u011f\u0131ndan emin olman\u0131n harika bir yoludur. Bu sayede, b\u00fcy\u00fck hatalar\u0131 \u00f6nleyebilir ve gelecekteki geli\u015ftirmeleri kolayla\u015ft\u0131rabilirsiniz. Bu rehberde, yeni ba\u015flayanlar i\u00e7in ad\u0131m ad\u0131m bir yakla\u015f\u0131mla, Express.js uygulamalar\u0131n\u0131z i\u00e7in etkili birim testleri nas\u0131l yazaca\u011f\u0131n\u0131z\u0131 \u00f6\u011freneceksiniz.\",\"breadcrumb\":{\"@id\":\"https:\/\/fatihsoysal.com\/blog\/express-js-uygulamalari-icin-birim-testleri-yazma-yeni-baslayanlar-icin-kilavuz\/#breadcrumb\"},\"inLanguage\":\"tr\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/fatihsoysal.com\/blog\/express-js-uygulamalari-icin-birim-testleri-yazma-yeni-baslayanlar-icin-kilavuz\/\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/fatihsoysal.com\/blog\/express-js-uygulamalari-icin-birim-testleri-yazma-yeni-baslayanlar-icin-kilavuz\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Anasayfa\",\"item\":\"https:\/\/fatihsoysal.com\/blog\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Express.js Uygulamalar\u0131 \u0130\u00e7in Birim Testleri Yazma: Yeni Ba\u015flayanlar \u0130\u00e7in K\u0131lavuz\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/fatihsoysal.com\/blog\/#website\",\"url\":\"https:\/\/fatihsoysal.com\/blog\/\",\"name\":\"Fatihsoysal.com\",\"description\":\"Blog - Yaz\u0131l\u0131m D\u00fcnyas\u0131 Tecr\u00fcbelerim\",\"publisher\":{\"@id\":\"https:\/\/fatihsoysal.com\/blog\/#\/schema\/person\/002a254750921dcfd568a99e48240dd1\"},\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\/\/fatihsoysal.com\/blog\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"tr\"},{\"@type\":[\"Person\",\"Organization\"],\"@id\":\"https:\/\/fatihsoysal.com\/blog\/#\/schema\/person\/002a254750921dcfd568a99e48240dd1\",\"name\":\"Fatih Soysal\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"tr\",\"@id\":\"https:\/\/fatihsoysal.com\/blog\/#\/schema\/person\/image\/\",\"url\":\"https:\/\/fatihsoysal.com\/blog\/wp-content\/uploads\/2024\/04\/cropped-replicate-prediction-3kgg1hgjn5rgp0cf0p5tr0jw7w-1.png\",\"contentUrl\":\"https:\/\/fatihsoysal.com\/blog\/wp-content\/uploads\/2024\/04\/cropped-replicate-prediction-3kgg1hgjn5rgp0cf0p5tr0jw7w-1.png\",\"width\":512,\"height\":512,\"caption\":\"Fatih Soysal\"},\"logo\":{\"@id\":\"https:\/\/fatihsoysal.com\/blog\/#\/schema\/person\/image\/\"},\"description\":\"Kullan\u0131m ve kodlama m\u00fckemmeliyetini odak alan uygulamalar olu\u015fturma deneyimine sahip, profesyonel olarak 15+ y\u0131l \u00fczeri deneyime sahip bir yaz\u0131l\u0131m m\u00fchendisi.\",\"url\":\"https:\/\/fatihsoysal.com\/blog\/author\/fatihsoysal\/\"}]}<\/script>\n<!-- \/ Yoast SEO Premium plugin. -->","yoast_head_json":{"title":"Express.js Uygulamalar\u0131 \u0130\u00e7in Birim Testleri Yazma: Yeni Ba\u015flayanlar \u0130\u00e7in K\u0131lavuz","description":"Merhaba! Fatih Soysal olarak, Express.js uygulamalar\u0131n\u0131z i\u00e7in sa\u011flam ve etkili birim testleri yazma konusunda size yard\u0131mc\u0131 olmak i\u00e7in buraday\u0131m. Birim testleri, kodunuzun k\u00fc\u00e7\u00fck par\u00e7alar\u0131n\u0131n beklendi\u011fi gibi \u00e7al\u0131\u015ft\u0131\u011f\u0131ndan emin olman\u0131n harika bir yoludur. Bu sayede, b\u00fcy\u00fck hatalar\u0131 \u00f6nleyebilir ve gelecekteki geli\u015ftirmeleri kolayla\u015ft\u0131rabilirsiniz. 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