Testem adds own title element which breaks document.title

As like ember-page-title, we cannot use document.title.
https://github.com/adopted-ember-addons/ember-page-title/blob/4732cdb2c9f673e4714334b33c5b4c5056dfcb8f/tests/acceptance/posts-test.js#L11

Author: kzys

tests/acceptance/crate-test.js

@@ -5,6 +5,7 @@ import { click, fillIn, currentURL, currentRouteName, visit } from '@ember/test-
 import a11yAudit from 'ember-a11y-testing/test-support/audit';
 import axeConfig from '../axe-config';
 import setupMirage from '../helpers/setup-mirage';
+import { title } from '../helpers/dom';
 import { percySnapshot } from 'ember-percy';
 
 module('Acceptance | crate page', function(hooks) {
@@ -66,7 +67,7 @@ module('Acceptance | crate page', function(hooks) {
         await click('[data-test-just-updated] [data-test-crate-link="0"]');
 
         assert.equal(currentURL(), '/crates/nanomsg');
-        assert.equal(document.title, 'nanomsg - Cargo: packages for Rust');
+        assert.equal(title(), 'nanomsg - Cargo: packages for Rust');
     });
 
     test('visiting /crates/nanomsg', async function(assert) {
@@ -78,7 +79,7 @@ module('Acceptance | crate page', function(hooks) {
 
         assert.equal(currentURL(), '/crates/nanomsg');
         assert.equal(currentRouteName(), 'crate.index');
-        assert.equal(document.title, 'nanomsg - Cargo: packages for Rust');
+        assert.equal(title(), 'nanomsg - Cargo: packages for Rust');
 
         assert.dom('[data-test-heading] [data-test-crate-name]').hasText('nanomsg');
         assert.dom('[data-test-heading] [data-test-crate-version]').hasText('0.6.1');
@@ -93,7 +94,7 @@ module('Acceptance | crate page', function(hooks) {
 
         assert.equal(currentURL(), '/crates/nanomsg/');
         assert.equal(currentRouteName(), 'crate.index');
-        assert.equal(document.title, 'nanomsg - Cargo: packages for Rust');
+        assert.equal(title(), 'nanomsg - Cargo: packages for Rust');
 
         assert.dom('[data-test-heading] [data-test-crate-name]').hasText('nanomsg');
         assert.dom('[data-test-heading] [data-test-crate-version]').hasText('0.6.1');
@@ -108,7 +109,7 @@ module('Acceptance | crate page', function(hooks) {
 
         assert.equal(currentURL(), '/crates/nanomsg/0.6.0');
         assert.equal(currentRouteName(), 'crate.version');
-        assert.equal(document.title, 'nanomsg - Cargo: packages for Rust');
+        assert.equal(title(), 'nanomsg - Cargo: packages for Rust');
 
         assert.dom('[data-test-heading] [data-test-crate-name]').hasText('nanomsg');
         assert.dom('[data-test-heading] [data-test-crate-version]').hasText('0.6.0');

tests/acceptance/crates-test.js

@@ -4,6 +4,7 @@ import { click, currentURL, visit } from '@ember/test-helpers';
 import a11yAudit from 'ember-a11y-testing/test-support/audit';
 import axeConfig from '../axe-config';
 import setupMirage from '../helpers/setup-mirage';
+import { title } from '../helpers/dom';
 import { percySnapshot } from 'ember-percy';
 
 module('Acceptance | crates page', function(hooks) {
@@ -39,7 +40,7 @@ module('Acceptance | crates page', function(hooks) {
         await click('[data-test-all-crates-link]');
 
         assert.equal(currentURL(), '/crates');
-        assert.equal(document.title, 'Crates - Cargo: packages for Rust');
+        assert.equal(title(), 'Crates - Cargo: packages for Rust');
     });
 
     test('visiting the crates page directly', async function(assert) {
@@ -49,7 +50,7 @@ module('Acceptance | crates page', function(hooks) {
         await click('[data-test-all-crates-link]');
 
         assert.equal(currentURL(), '/crates');
-        assert.equal(document.title, 'Crates - Cargo: packages for Rust');
+        assert.equal(title(), 'Crates - Cargo: packages for Rust');
     });
 
     test('listing crates', async function(assert) {

tests/acceptance/front-page-test.js

@@ -4,6 +4,7 @@ import { currentURL, visit } from '@ember/test-helpers';
 import a11yAudit from 'ember-a11y-testing/test-support/audit';
 import axeConfig from '../axe-config';
 import setupMirage from '../helpers/setup-mirage';
+import { title } from '../helpers/dom';
 import { percySnapshot } from 'ember-percy';
 
 module('Acceptance | front page', function(hooks) {
@@ -25,7 +26,7 @@ module('Acceptance | front page', function(hooks) {
         await visit('/');
 
         assert.equal(currentURL(), '/');
-        assert.equal(document.title, 'Cargo: packages for Rust');
+        assert.equal(title(), 'Cargo: packages for Rust');
 
         assert.dom('[data-test-install-cargo-link]').exists();
         assert.dom('[data-test-all-crates-link]').exists();

tests/acceptance/search-test.js

@@ -5,6 +5,7 @@ import a11yAudit from 'ember-a11y-testing/test-support/audit';
 import { triggerKeyDown, triggerKeyPress } from 'ember-keyboard';
 import axeConfig from '../axe-config';
 import setupMirage from '../helpers/setup-mirage';
+import { title } from '../helpers/dom';
 import { percySnapshot } from 'ember-percy';
 
 module('Acceptance | search', function(hooks) {
@@ -30,7 +31,7 @@ module('Acceptance | search', function(hooks) {
         await triggerEvent('[data-test-search-form]', 'submit');
 
         assert.equal(currentURL(), '/search?q=rust');
-        assert.equal(document.title, "Search Results for 'rust' - Cargo: packages for Rust");
+        assert.equal(title(), "Search Results for 'rust' - Cargo: packages for Rust");
 
         assert.dom('[data-test-heading]').hasText("Search Results for 'rust'");
         assert.dom('[data-test-search-nav]').hasText('Displaying 1-8 of 8 total results');
@@ -53,7 +54,7 @@ module('Acceptance | search', function(hooks) {
         await visit('/search?q=rust');
 
         assert.equal(currentURL(), '/search?q=rust');
-        assert.equal(document.title, "Search Results for 'rust' - Cargo: packages for Rust");
+        assert.equal(title(), "Search Results for 'rust' - Cargo: packages for Rust");
 
         assert.dom('[data-test-search-input]').hasValue('rust');
         assert.dom('[data-test-heading]').hasText("Search Results for 'rust'");

tests/helpers/dom.js

@@ -0,0 +1,8 @@
+// Because Testem adds own title element
+// https://github.com/adopted-ember-addons/ember-page-title/blob/4732cdb2c9f673e4714334b33c5b4c5056dfcb8f/tests/acceptance/posts-test.js#L11
+function title() {
+    let titles = document.head.getElementsByTagName('title');
+    return titles[titles.length - 1].innerText;
+}
+
+export { title };