Fix test

Author: ahmacleod

tests/integration/components/scroll-indicators-test.js

@@ -134,12 +134,15 @@ module('Integration | scroll indicators', function() {
         },
       });
 
+      // not necessarily 100px wide because of integer division
+      let lastHeader = table.headers.objectAt(table.headers.length - 1);
+
       assert.equal(
         table.isScrollIndicatorRendered('right'),
         true,
         'right scroll indicator is initially shown'
       );
-      assert.ok(isOffset('right', 100), 'right scroll indicator is offset');
+      assert.ok(isOffset('right', lastHeader.width), 'right scroll indicator is offset');
       assert.equal(
         table.isScrollIndicatorRendered('left'),
         false,
@@ -154,7 +157,7 @@ module('Integration | scroll indicators', function() {
         true,
         'right scroll indicator is shown during partial scroll'
       );
-      assert.ok(isOffset('right', 100), 'right scroll indicator is offset');
+      assert.ok(isOffset('right', lastHeader.width), 'right scroll indicator is offset');
       assert.equal(
         table.isScrollIndicatorRendered('left'),
         true,