Refactor categories into rootListing

This uses proper paths with slashes everywhere, and lists documents
instead of just folders for root.

tests/integration/components/breadcrumb-nav-test.js

@@ -0,0 +1,24 @@
+import { moduleForComponent, test } from 'ember-qunit';
+import hbs from 'htmlbars-inline-precompile';
+
+moduleForComponent('breadcrumb-nav', 'Integration | Component | breadcrumb nav', {
+  integration: true
+});
+
+test('it renders', function(assert) {
+  // Set any properties with this.set('myProperty', 'value');
+  // Handle any actions with this.on('myAction', function(val) { ... });
+
+  this.render(hbs`{{breadcrumb-nav}}`);
+
+  assert.equal(this.$().text().trim(), '');
+
+  // Template block usage:
+  this.render(hbs`
+    {{#breadcrumb-nav}}
+      template block text
+    {{/breadcrumb-nav}}
+  `);
+
+  assert.equal(this.$().text().trim(), 'template block text');
+});

tests/integration/components/categories-nav/component-test.js

@@ -6,7 +6,10 @@ moduleForComponent('categories-nav', 'Integration | Component | categories nav',
 });
 
 test('it renders categories', function(assert) {
-  this.set('categories', [ 'documents', 'notes' ]);
+  this.set('categories', [
+    { name: 'documents', path: 'documents/' },
+    { name: 'notes', path: 'notes/' }
+  ]);
 
   this.render(hbs`{{categories-nav categories=categories}}`);