solution from styk-tv

.gitignore

@@ -1,3 +1,4 @@
+.DS_Store
 # Logs
 logs
 *.log

.travis.yml

@@ -2,6 +2,7 @@ language: node_js
 node_js:
   - "node"
   - "iojs"
+services:
+  - "xvfb"
 before_script:
   - export DISPLAY=:99.0
-  - sh -e /etc/init.d/xvfb start

README.md

@@ -6,3 +6,9 @@ A suite of JavaScript tests (hopefully) useful for interviews
 1. `npm install`
 2. `npm test`/`npm watch`
 3. Get the candidate to complete the tests and Karma should watch the files and run the tests on save.
+
+## Solved
+
+1. `clone-object` ![alt text](https://raw.githubusercontent.com/styk-tv/javascript-tests/master/screenshots/clone.png?raw=true)
+2. `flatten-array` ![alt text](https://raw.githubusercontent.com/styk-tv/javascript-tests/master/screenshots/flatten.png?raw=true)
+3. `scoping` ![alt text](https://raw.githubusercontent.com/styk-tv/javascript-tests/master/screenshots/scoping.png?raw=true)

karma.conf.js

@@ -1,5 +1,5 @@
 // Karma configuration
-// Generated on Wed Jun 18 2014 09:33:44 GMT+0100 (BST)
+// Generated on Fri Jul 12 2019 17:03:22 GMT+0100 (British Summer Time)
 
 module.exports = function(config) {
   var browsers = ['PhantomJS', 'Firefox'];
@@ -21,20 +21,19 @@ module.exports = function(config) {
 
     // list of files / patterns to load in the browser
     files: [
-      'test/**/*.js'
+      './node_modules/phantomjs-polyfill-object-assign/object-assign-polyfill.js',
+      'test/*.js'
     ],
 
 
-    // list of files to exclude
+    // list of files / patterns to exclude
     exclude: [
-
     ],
 
 
     // preprocess matching files before serving them to the browser
     // available preprocessors: https://npmjs.org/browse/keyword/karma-preprocessor
     preprocessors: {
-
     },
 
 
@@ -54,7 +53,7 @@ module.exports = function(config) {
 
     // level of logging
     // possible values: config.LOG_DISABLE || config.LOG_ERROR || config.LOG_WARN || config.LOG_INFO || config.LOG_DEBUG
-    logLevel: config.LOG_INFO,
+    logLevel: config.LOG_DEBUG,
 
 
     // enable / disable watching file and executing tests whenever any file changes
@@ -68,6 +67,10 @@ module.exports = function(config) {
 
     // Continuous Integration mode
     // if true, Karma captures browsers, runs the tests and exits
-    singleRun: true
-  });
-};
+    singleRun: true,
+
+    // Concurrency level
+    // how many browser should be started simultaneous
+    concurrency: 1
+  })
+}