Clean up few things

addon/helpers/page-title.js

@@ -30,9 +30,14 @@ export default Helper.extend({
           _hash._deprecate
       );
     }
-    let hash = assign({}, _hash);
-    hash.id = this.tokenId;
-    hash.title = params.join('');
+    let hash = assign(
+      {},
+      _hash,
+      {
+        id: this.tokenId,
+        title: params.join('')
+      }
+    );
 
     this.tokens.push(hash);
     this.tokens.scheduleTitleUpdate();

addon/services/page-title-list.js

@@ -20,7 +20,6 @@ export default Service.extend({
   init() {
     this._super();
     set(this, 'tokens', A());
-    set(this, 'length', 0);
     this._removeExistingTitleTag();
 
     let config = getOwner(this).resolveRegistration('config:environment');
@@ -117,7 +116,6 @@ export default Service.extend({
     let tokens = copy(this.tokens);
     tokens.push(token);
     set(this, 'tokens', A(tokens));
-    set(this, 'length', this.length + 1);
   },
 
   remove(id) {
@@ -136,7 +134,6 @@ export default Service.extend({
     let tokens = A(copy(this.tokens));
     tokens.removeObject(token);
     set(this, 'tokens', A(tokens));
-    set(this, 'length', this.length - 1);
   },
 
   visibleTokens: computed('tokens', {
@@ -195,10 +192,6 @@ export default Service.extend({
     }
   }),
 
-  // TODO use something else for initial render for routes
-  // without model() returning promise
-  // Example: A -> B -> C - when C is the target route and model() takes long time to load
-  // title of A and B will no be rendered until activeTransition.promise resolves.
   scheduleTitleUpdate() {
     let router = getOwner(this).lookup('router:main');
     let routes = router._routerMicrolib || router.router;

tests/unit/services/page-title-list-test.js

@@ -5,13 +5,13 @@ module('service:page-title-list', function(hooks) {
   setupTest(hooks);
 
   test('the list has no tokens by default', function (assert) {
-    assert.equal(this.owner.lookup('service:page-title-list').length, 0);
+    assert.equal(this.owner.lookup('service:page-title-list').tokens.length, 0);
   });
 
   test('calling `push` adds a token to the end of the list', function (assert) {
     let list = this.owner.lookup('service:page-title-list');
     list.push({ id: 1});
-    assert.equal(list.length, 1);
+    assert.equal(list.tokens.length, 1);
   });
 
   test('tokens have next and previous tokens', function (assert) {
@@ -24,7 +24,7 @@ module('service:page-title-list', function(hooks) {
     list.push(second);
     list.push(third);
 
-    assert.equal(list.length, 3);
+    assert.equal(list.tokens.length, 3);
 
     assert.equal(first.previous, null);
     assert.equal(first.next, second);
@@ -46,7 +46,7 @@ module('service:page-title-list', function(hooks) {
     list.push(second);
     list.push(third);
     list.remove(2);
-    assert.equal(list.length, 2);
+    assert.equal(list.tokens.length, 2);
 
     assert.equal(first.previous, null);
     assert.equal(first.next, third);