FIX: adaptes acceptance tests for new dropdown-menu (#570)

assets/javascripts/discourse/components/assigned-to-post.gjs

@@ -39,14 +39,19 @@ export default class AssignedToPost extends Component {
       {{/if}}
     </a>
 
-    <DMenu @icon="ellipsis-h" class="btn-flat more-button" @autofocus={{true}}>
+    <DMenu
+      @identifier="post-assign-menu"
+      @icon="ellipsis-h"
+      class="btn-flat more-button"
+      @autofocus={{true}}
+    >
       <DropdownMenu as |dropdown|>
         <dropdown.item>
           <DButton
             @action={{this.unassign}}
             @icon="user-plus"
             @label="discourse_assign.unassign.title"
-            class="btn-transparent"
+            class="btn-transparent unassign-btn"
           />
         </dropdown.item>
         <dropdown.item>
@@ -54,7 +59,7 @@ export default class AssignedToPost extends Component {
             @action={{this.editAssignment}}
             @icon="group-plus"
             @label="discourse_assign.reassign.title_w_ellipsis"
-            class="btn-transparent"
+            class="btn-transparent edit-assignment-btn"
           />
         </dropdown.item>
       </DropdownMenu>

test/javascripts/acceptance/post-popup-menu-test.js

@@ -13,8 +13,8 @@ const selectors = {
   assignedTo: ".post-stream article#post_2 .assigned-to",
   moreButton: ".post-stream .topic-post .more-button",
   popupMenu: {
-    unassign: ".popup-menu .popup-menu-btn svg.d-icon-user-plus",
-    editAssignment: ".popup-menu .popup-menu-btn svg.d-icon-group-plus",
+    unassign: ".post-assign-menu-content .unassign-btn",
+    editAssignment: ".post-assign-menu-content .edit-assignment-btn",
   },
   modal: {
     assignee: ".modal-container .select-kit-header-wrapper",