Disable hardware acceleration for unit tests

Explicitly disable hardware acceleration to make image diff more stable when ran on Travis and dev machine.

diff --git a/karma.conf.js b/karma.conf.js
index c41b23e0e030f40285166d4402f10e9a6a8f0ab5..5bb73ef03a0b0d72e9f3b12e7e1aa2b26612b590 100644 (file)
--- a/karma.conf.js
+++ b/karma.conf.js
@@ -3,9 +3,27 @@
 module.exports = function(karma) {
        var args = karma.args || {};
        var config = {
-               browsers: ['Firefox'],
                frameworks: ['browserify', 'jasmine'],
                reporters: ['progress', 'kjhtml'],
+               browsers: ['chrome', 'firefox'],
+
+               // Explicitly disable hardware acceleration to make image
+               // diff more stable when ran on Travis and dev machine.
+               // https://github.com/chartjs/Chart.js/pull/5629
+               customLaunchers: {
+                       chrome: {
+                               base: 'Chrome',
+                               flags: [
+                                       '--disable-accelerated-2d-canvas'
+                               ]
+                       },
+                       firefox: {
+                               base: 'Firefox',
+                               prefs: {
+                                       'layers.acceleration.disabled': true
+                               }
+                       }
+               },
 
                preprocessors: {
                        './test/jasmine.index.js': ['browserify'],
@@ -24,15 +42,7 @@ module.exports = function(karma) {
 
        // https://swizec.com/blog/how-to-run-javascript-tests-in-chrome-on-travis/swizec/6647
        if (process.env.TRAVIS) {
-               config.browsers.push('chrome_travis_ci');
-               config.customLaunchers = {
-                       chrome_travis_ci: {
-                               base: 'Chrome',
-                               flags: ['--no-sandbox']
-                       }
-               };
-       } else {
-               config.browsers.push('Chrome');
+               config.customLaunchers.chrome.flags.push('--no-sandbox');
        }
 
        if (args.coverage) {