chore: update karma.conf for CI

karma.conf.js

@@ -2,33 +2,20 @@
 
 module.exports = function(config) {
   config.set({
-
     // base path that will be used to resolve all patterns (eg. files, exclude)
     basePath: '',
 
 
     // frameworks to use
     // available frameworks: https://npmjs.org/browse/keyword/karma-adapter
-    frameworks: ['mocha', 'sinon'],
+    frameworks: ['mocha', 'chai'],
 
 
     // list of files / patterns to load in the browser
     files: [
       './tests/**/*.test.js'
     ],
 
-
-    // list of files to exclude
-    exclude: [
-    ],
-
-
-    // preprocess matching files before serving them to the browser
-    // available preprocessors: https://npmjs.org/browse/keyword/karma-preprocessor
-    preprocessors: {
-    },
-
-
     // test results reporter to use
     // possible values: 'dots', 'progress'
     // available reporters: https://npmjs.org/browse/keyword/karma-reporter
@@ -59,7 +46,7 @@ module.exports = function(config) {
 
     // Continuous Integration mode
     // if true, Karma captures browsers, runs the tests and exits
-    singleRun: false,
+    singleRun: !!process.env.CI,
 
     // Concurrency level
     // how many browser should be started simultaneous