From 4a8000b51a9854e21361e435e4c9b9cbd8ac458a Mon Sep 17 00:00:00 2001
From: Richard Gibson <richard.gibson@gmail.com>
Date: Mon, 16 Mar 2015 23:05:36 -0400
Subject: [PATCH] Tests: Fix CSS relative adjustment test for round-down
 browsers

Ref 9b03f6df88a8d9dbda3f7893cdd84e3a3c70da17
Ref 6fb2cefc602cf8bd8b85373f480e978bb8978e37

(cherry picked from commit 48be675200e817f40fa8ec25da1be2ab0839d28d)
---
 test/unit/css.js | 26 +++++++++++++++++++-------
 1 file changed, 19 insertions(+), 7 deletions(-)

diff --git a/test/unit/css.js b/test/unit/css.js
index 9dcc9101d..1fdbfd78a 100644
--- a/test/unit/css.js
+++ b/test/unit/css.js
@@ -222,13 +222,25 @@ test( "css() non-px relative values (gh-1711)", 17, function() {
 		units = {},
 		$child = jQuery( "#nothiddendivchild" ),
 		add = function( prop, val, unit ) {
-			var str = ( val < 0 ? "-=" : "+=" ) + Math.abs( val ) + unit;
-			$child.css( prop, str );
-			equal(
-				Math.round( parseFloat( $child.css( prop ) ) ),
-				Math.round( cssCurrent += val * units[ prop ][ unit ] ),
-				prop + ": '" + str + "'"
-			);
+			var difference,
+				adjustment = ( val < 0 ? "-=" : "+=" ) + Math.abs( val ) + unit,
+				message = prop + ": " + adjustment,
+				cssOld = cssCurrent,
+				expected = cssOld + val * units[ prop ][ unit ];
+
+			// Apply change
+			$child.css( prop, adjustment );
+			cssCurrent = parseFloat( $child.css( prop ) );
+
+			// Require a difference of less than one pixel
+			difference = Math.abs( cssCurrent - expected );
+			if ( difference < 1 ) {
+				ok( true, message );
+
+			// ...or fail with actual and expected values
+			} else {
+				ok( false, message + " (actual " + cssCurrent + ", expected " + expected + ")" );
+			}
 		},
 		getUnits = function( prop ) {
 			units[ prop ] = {
-- 
2.39.5