Remove chromium dependency for tests (#73)

README.md

@@ -2,7 +2,7 @@
 
 This repository contains an alternative web frontend for [airsonic](https://github.com/airsonic/airsonic). The goal is to eventually be able to fully replace the current web interface.
 
-## Implemented so far
+## Implemented So Far
 
 * Login with persisting credentials
 * Browse your library by newest / most recently played / starred
@@ -39,7 +39,7 @@ $ npm run dev
 
 All other build tasks are defined in the `package.json` (more below).
 
-### Editor integration
+### Editor Integration
 
 Integrating shadow-cljs with your editor helps tremendously with development. After having run `npm run dev` as described above you can connect to the REPL and get features like in-editor code execution and code completion / documentation lookup. For further information see [this part of the shadow-cljs user guide](https://shadow-cljs.github.io/docs/UsersGuide.html#_editor_integration). Recommended editors and plugins are Calva for VSCode and CIDER for Emacs (comes with Spacemacs). Make sure to open `localhost:8080` in the browser after starting the `dev:cljs` task to execute ClojureScript code in a live REPL.
 
@@ -53,7 +53,7 @@ It provides you with tools to inspect the state of the application, undo and rep
 
 ## Tests
 
-This project uses [karma](https://karma-runner.github.io/) for tests. Make sure to have Google Chrome installed, otherwise the watcher will time out.
+This project uses [karma](https://karma-runner.github.io/) for tests. There is a check inside `karma.conf.js` to see whether Firefox is installed (via `which firefox` which probably breaks on Windows 🤷); if that command doesn't fail it will be used as the test runner. Otherwise Chrome will be used. If you have Chromium installed, make sure to set the `CHROME_BIN` environment variable to point to Chromium.
 
 ```
 # run tests once

karma.conf.js

@@ -1,6 +1,23 @@
+const { execSync } = require('child_process')
+
 module.exports = function (config) {
+
+  let browsers = null;
+  if (process.env.TRAVIS || process.env.CI) {
+    // custom config for continuous integration
+    browsers = ['ChromeHeadlessCI']
+  } else {
+    try {
+      // if Firefox is installed, use that as the test runner
+      execSync('which firefox')
+      browsers = ['FirefoxHeadless']
+    } catch (_) {
+      browsers = ['ChromeHeadless']
+    }
+  }
+
   const configuration = {
-    browsers: ['ChromeHeadless'],
+    browsers: browsers,
     // The tests are sometimes run before the tests were completely written
     // to disc; this is a known problem unfortunately. This is a hack to at
     // least keep the browsers connected so the tests are compiled and run
@@ -15,6 +32,7 @@ module.exports = function (config) {
     plugins: [
       'karma-cljs-test',
       'karma-chrome-launcher',
+      'karma-firefox-launcher',
       'karma-notify-reporter' // reporters are set in package.json
     ],
     colors: true,
@@ -31,10 +49,5 @@ module.exports = function (config) {
     }
   }
 
-  if (process.env.TRAVIS || process.env.CI) {
-    configuration.browsers = ['ChromeHeadlessCI']
-  }
-
-
   config.set(configuration)
 }

package-lock.json

@@ -4004,6 +4004,23 @@
       "integrity": "sha1-y4YF7w4R+ab20o9Wul298m84mSM=",
       "dev": true
     },
+    "karma-firefox-launcher": {
+      "version": "1.2.0",
+      "resolved": "https://registry.npmjs.org/karma-firefox-launcher/-/karma-firefox-launcher-1.2.0.tgz",
+      "integrity": "sha512-j9Zp8M8+VLq1nI/5xZGfzeaEPtGQ/vk3G+Y8vpmFWLvKLNZ2TDjD6cu2dUu7lDbu1HXNgatsAX4jgCZTkR9qhQ==",
+      "dev": true,
+      "requires": {
+        "is-wsl": "^2.1.0"
+      },
+      "dependencies": {
+        "is-wsl": {
+          "version": "2.1.1",
+          "resolved": "https://registry.npmjs.org/is-wsl/-/is-wsl-2.1.1.tgz",
+          "integrity": "sha512-umZHcSrwlDHo2TGMXv0DZ8dIUGunZ2Iv68YZnrmCiBPkZ4aaOhtv7pXJKeki9k3qJ3RJr0cDyitcl5wEH3AYog==",
+          "dev": true
+        }
+      }
+    },
     "karma-notify-reporter": {
       "version": "1.1.0",
       "resolved": "https://registry.npmjs.org/karma-notify-reporter/-/karma-notify-reporter-1.1.0.tgz",

package.json

@@ -42,6 +42,7 @@
     "karma": "^4.0.1",
     "karma-chrome-launcher": "^3.0.0",
     "karma-cljs-test": "^0.1.0",
+    "karma-firefox-launcher": "^1.2.0",
     "karma-notify-reporter": "^1.1.0",
     "node-sass": "^4.11.0",
     "npm-run-all": "^4.1.5",