{"id":1672,"date":"2023-03-27T22:00:00","date_gmt":"2023-03-27T20:00:00","guid":{"rendered":"https:\/\/demo.sidekick.be\/itenium\/javascript-testing-jasmine-getting-started\/"},"modified":"2025-11-28T13:31:46","modified_gmt":"2025-11-28T12:31:46","slug":"javascript-testing-jasmine-getting-started","status":"publish","type":"post","link":"https:\/\/demo.sidekick.be\/itenium\/blog\/javascript\/javascript-testing-jasmine-getting-started\/","title":{"rendered":"JavaScript Testing: Getting started with Jasmine"},"content":{"rendered":"<h1 id=\"install\">Install<\/h1>\n<p>Add Jasmine to your project:<\/p>\n<pre><code class=\"language-sh\">npm install --save-dev jasmine\n.\/node_modules\/.bin\/jasmine init\n<\/code><\/pre>\n<p>You can omit the <code>.\/node_modules\/.bin\/<\/code> if you have Jasmine installed globally. The following code snippets will assume you did.<\/p>\n<p>If you have no clue how to start, some <strong>working examples<\/strong> can be created with <code>jasmine examples<\/code>.<\/p>\n<h1 id=\"configure\">Configure<\/h1>\n<p><code>jasmine init<\/code> creates <code>.\/spec\/support\/jasmine.json<\/code> where you can configure your testing preferences. If you want to put the jasmine.json file somewhere else, you can do so by providing a value for the environment variable <code>JASMINE_CONFIG_PATH<\/code>.<\/p>\n<pre><code class=\"language-json\">{\n  \"spec_dir\": \"spec\",\n  \"spec_files\": [\n    \"**\/*[sS]pec.js\"\n  ],\n  \"helpers\": [\n    \"helpers\/**\/*.js\"\n  ]\n}\n<\/code><\/pre>\n<p>The default Jasmine configuration makes the assumption that all tests are placed in <code>.\/spec\/<\/code> and are suffixed with <code>spec.js<\/code>. Helpers (not covered here) allow you to provide custom matchers in your tests.<\/p>\n<p>If you want to place your tests closer to the actual code they are testing, you can simply change <code>spec_dir<\/code>. If the source code is in <code>.\/src<\/code> use the following spec_dir values:<\/p>\n<ul>\n<li><code>src\/**\/spec<\/code>: The tests for <code>\/src\/path\/to\/file.js<\/code> would be in <code>\/src\/path\/to\/spec\/fileSpec.js<\/code>.<\/li>\n<li><code>src<\/code>: To place the tests in the same folder as the source files.<\/li>\n<\/ul>\n<p>Note that paths in the json are relative to where <code>jasmine init<\/code> was executed.<\/p>\n<h1 id=\"run\">Run<\/h1>\n<p>Run the tests with a simple <code>jasmine<\/code> or add to your package.json:<\/p>\n<pre><code class=\"language-json\">\"scripts\": {\n  \"test\": \"jasmine\",\n  \"test:w\": \"nodemon --exec \"npm test\"\",\n  \"test:alt\": \"jasmine JASMINE_CONFIG_PATH=spec\/support\/jasmine-alt.json\",\n  \"test:cli\": \"jasmine --filter=\"describe and\/or it\" --stop-on-failure=true --no-color --random=true -seed=7337\"\n},\n<\/code><\/pre>\n<p>And start once with <code>npm test<\/code> or just <code>npm t<\/code>. Or start watching with <code>npm run test:w<\/code>.<\/p>\n<p><code>test:w<\/code>(atch) requires a <code>npm install --save-dev nodemon<\/code> to work.<\/p>\n<p><code>test:alt<\/code> and <code>test:cli<\/code> demonstrate the available Jasmine CLI parameters.<\/p>\n<h1 id=\"transpile\">Transpile<\/h1>\n<h2 id=\"babel\">Babel<\/h2>\n<p>Node can handle most syntax you throw at it, but if you do use something too fancy, <a href=\"http:\/\/babeljs.io\/docs\/setup\">Babel<\/a> to the rescue!<\/p>\n<pre><code class=\"language-sh\">npm install --save-dev @babel\/cli @babel\/core @babel\/node\n\n# Add all the presets\/plugins you're using\nnpm install --save-dev @babel\/preset-env @babel\/polyfill core-js\n<\/code><\/pre>\n<p>Add all the presets\/plugins to your <code>.babelrc<\/code><\/p>\n<pre><code class=\"language-json\">{\n  \"presets\": [\"@babel\/preset-env\"]\n}\n<\/code><\/pre>\n<p>File <code>run-jasmine.js<\/code>:<\/p>\n<pre><code class=\"language-js\">import '@babel\/polyfill';\nimport 'core-js\/shim';\nimport Jasmine from 'jasmine';\n\nconst jasmine = new Jasmine();\njasmine.loadConfigFile('.\/spec\/support\/jasmine.json');\njasmine.execute();\n<\/code><\/pre>\n<p>The accompanying code has a working example for Babel transpilation in the <code>babel<\/code> folder.<\/p>\n<h3 id=\"building-and-watching\">Building and watching<\/h3>\n<p><code>package.json<\/code> scripts:<\/p>\n<pre><code class=\"language-json\">\"scripts\": {\n  \/\/ Clean generated files (requires npm i -D del-cli)\n  \"babel:clean\": \"del-cli dist\",\n\n  \/\/ Transpile to dist directory\n  \"babel:build\": \"babel babel --out-dir dist --ignore some-generated-dir\/\",\n\n  \/\/ Clean, build and run jasmine\n  \"babel\": \"npm run babel:clean &amp;&amp; npm run babel:build &amp;&amp; node babel\/dist\/run-jasmine.js\",\n\n  \/\/ Watch for changes\n  \"babel:w\": \"nodemon --exec \"npm run babel\" --ignore babel\/dist\/\"\n}\n<\/code><\/pre>\n<h2 id=\"typescript\">TypeScript<\/h2>\n<p><code>ts-node<\/code> to the rescue!<br \/> Make sure you change your <code>jasmine.json<\/code> file extensions to <code>.ts<\/code>.<\/p>\n<pre><code class=\"language-sh\">npm install --save-dev jasmine @types\/jasmine typescript ts-node cross-env\n<\/code><\/pre>\n<p><code>jasmine.json<\/code> content:<\/p>\n<pre><code class=\"language-json\">{\n  \"spec_dir\": \"spec\",\n  \"spec_files\": [\n    \"**\/*[sS]pec.ts\"\n  ],\n  \"helpers\": [\n    \"helpers\/**\/*.ts\"\n  ],\n  \"stopSpecOnExpectationFailure\": false,\n  \"random\": true,\n  \"reporters\": [\n    {\n      \"name\": \"jasmine-spec-reporter#SpecReporter\",\n      \"options\": {\n        \"displayStacktrace\": \"all\"\n      }\n    }\n  ]\n}\n<\/code><\/pre>\n<p><code>package.json<\/code> scripts:<\/p>\n<pre><code class=\"language-json\">\"scripts\": {\n  \"test\": \"cross-env NODE_OPTIONS=--loader=ts-node\/esm jasmine\",\n\n  \/\/ -e ts: reload on file extension ts\n  \"test:w\": \"nodemon -e ts --exec \"npm test\"\"\n}\n<\/code><\/pre>\n<h1>Also in this series<\/h1>\n<ul>\n<li>This Part: JavaScript Testing: Getting started with Jasmine<\/li>\n<li>Part 2: <a href=\"\/javascript\/javascript-testing-jasmine-syntax\/\">JavaScript Testing: Jasmine syntax<\/a><\/li>\n<li>Part 3: <a href=\"\/javascript\/javascript-testing-jasmine-spies\/\">JavaScript Testing: Jasmine Spies<\/a><\/li>\n<li>Part 4: <a href=\"\/javascript\/javascript-testing-jasmine-async\/\">JavaScript Testing: Jasmine async syntax<\/a><\/li>\n<li>Part 5: <a href=\"\/javascript\/javascript-testing-jasmine-customization\/\">JavaScript Testing: Jasmine customization<\/a><\/li>\n<li>Part 6: <a href=\"\/javascript\/javascript-testing-jasmine-plugins\/\">JavaScript Testing: Jasmine plugins<\/a><\/li>\n<li>Part 7: <a href=\"\/javascript\/javascript-testing-jasmine-to-jest\/\">JavaScript Testing: Jasmine to Jest<\/a><\/li>\n<\/ul>\n<h1>Extras<\/h1>\n<p><b>Stuff that came into being during the making of this post<\/b><\/p>\n<ul>\n<li><a href=\"https:\/\/github.com\/itenium-be\/jasmine-tut\">The accompanying source on GitHub<\/a><\/li>\n<\/ul>\n<p><b>Other interesting reads<\/b><\/p>\n<ul>\n<li><a href=\"https:\/\/jasmine.github.io\/api\/edge\/matchers.html\">Jasmine documentation: Matchers<\/a><\/li>\n<li><a href=\"https:\/\/github.com\/jasmine\/jasmine\" class=\"github\"><img decoding=\"async\" src=\"https:\/\/img.shields.io\/github\/stars\/jasmine\/jasmine.svg?style=social&#038;label=Star\" \/><\/a><a href=\"https:\/\/github.com\/jasmine\/jasmine\">jasmine\/jasmine<\/a>: <\/li>\n<\/ul>\n<h1>Updates<\/h1>\n<ul>\n<li> 28 March 2023: jasmine-ts is deprecated. Updated to Jasmine 4.3.0.<\/li>\n<\/ul>\n<h1> Package Versions <i class=\"fa fa-info-circle\" style=\"float: right; color: cornflowerblue; font-size: 28px\" title=\"Package versions used for this post and in the accompanying code on Github\"><\/i><\/h1>\n<div><a href=\"https:\/\/github.com\/jasmine\/jasmine\" class=\"github\"><img decoding=\"async\" src=\"https:\/\/img.shields.io\/github\/stars\/jasmine\/jasmine.svg?style=social&#038;label=Star\" \/><\/a><a href=\"https:\/\/github.com\/jasmine\/jasmine\">jasmine\/jasmine<\/a>: v4.3.0 <\/div>\n","protected":false},"excerpt":{"rendered":"<p>Probably the most widely used JavaScript testing framework.<\/p>\n<p>This tutorial covers installation, configuration and execution only. For the Jasmine syntax, see parts 2 to 4!<\/p>\n","protected":false},"author":1,"featured_media":2111,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"inline_featured_image":false,"footnotes":""},"categories":[3],"tags":[21,6],"class_list":["post-1672","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-javascript","tag-testing","tag-tutorial"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.5 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>JavaScript Testing: Getting started with Jasmine - Itenium<\/title>\n<meta name=\"robots\" content=\"noindex, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"JavaScript Testing: Getting started with Jasmine - Itenium\" \/>\n<meta property=\"og:description\" content=\"Probably the most widely used JavaScript testing framework.This tutorial covers installation, configuration and execution only. 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