tests(tree): Update tests to reflect localized aria label.

Author: skrustev

src/components/tree/tree-utils.spec.ts

@@ -30,9 +30,11 @@ export class TreeTestFunctions {
     expanded: boolean
   ): void => {
     expect(slot).lightDom.to.equal(
-      `<igc-icon name=${
-        expanded ? 'tree_collapse' : 'tree_expand'
-      } collection="default"></igc-icon>`,
+      `<igc-icon
+        aria-label=${expanded ? 'Collapse' : 'Expand'}
+        name=${expanded ? 'tree_collapse' : 'tree_expand'}
+        collection="default">
+        </igc-icon>`,
       DIFF_OPTIONS
     );
   };

src/components/tree/tree.spec.ts

@@ -290,7 +290,7 @@ describe('Tree', () => {
       els = indSlot2.assignedElements({ flatten: true });
       expect(els.length).to.equal(1);
       expect(els[0]).dom.to.equal(
-        `<igc-icon collection="default" name="tree_collapse">
+        `<igc-icon collection="default" aria-label="Collapse" name="tree_collapse">
         </igc-icon>`,
         DIFF_OPTIONS
       );