From 00ccddc3c4a3a9c454cacd6596878eef07867ff0 Mon Sep 17 00:00:00 2001
From: diosmosis <benaka@piwik.pro>
Date: Fri, 31 Oct 2014 04:29:53 -0700
Subject: [PATCH] Display mismatch percentage in failure message in screenshot
 tests.

---
 tests/lib/screenshot-testing/support/chai-extras.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tests/lib/screenshot-testing/support/chai-extras.js b/tests/lib/screenshot-testing/support/chai-extras.js
index 1a65b718fa..6b12de1998 100644
--- a/tests/lib/screenshot-testing/support/chai-extras.js
+++ b/tests/lib/screenshot-testing/support/chai-extras.js
@@ -139,7 +139,7 @@ function capture(screenName, compareAgainst, selector, pageSetupFn, done) {
             // if the files are not exact, perform a diff to check if they are truly different
             resemble("file://" + processedScreenshotPath).compareTo("file://" + expectedScreenshotPath).onComplete(function(data) {
                 if (data.misMatchPercentage != 0) {
-                    fail("Processed screenshot does not match expected for " + screenshotFileName + ".");
+                    fail("Processed screenshot does not match expected for " + screenshotFileName + ". (mismatch = " + data.misMatchPercentage + ")");
                     return;
                 }
 
-- 
GitLab