[Glimmer2] Port {{loc}} helper test to ember-glimmer

packages/ember-glimmer/lib/environment.js

@@ -19,12 +19,14 @@ import {
 } from './helpers/if-unless';
 
 import { default as hash } from './helpers/hash';
+import { default as loc } from './helpers/loc';
 
 const builtInHelpers = {
   concat,
   if: inlineIf,
   unless: inlineUnless,
-  hash
+  hash,
+  loc
 };
 
 export default class extends Environment {

packages/ember-glimmer/lib/helpers/loc.js

@@ -0,0 +1,45 @@
+import { helper } from '../helper';
+import { loc } from 'ember-runtime/system/string';
+
+/**
+@module ember
+@submodule ember-templates
+*/
+
+/**
+  Calls [Ember.String.loc](/api/classes/Ember.String.html#method_loc) with the
+  provided string. This is a convenient way to localize text within a template.
+  For example:
+
+  ```javascript
+  Ember.STRINGS = {
+    '_welcome_': 'Bonjour'
+  };
+  ```
+
+  ```handlebars
+  <div class='message'>
+    {{loc '_welcome_'}}
+  </div>
+  ```
+
+  ```html
+  <div class='message'>
+    Bonjour
+  </div>
+  ```
+
+  See [Ember.String.loc](/api/classes/Ember.String.html#method_loc) for how to
+  set up localized string references.
+
+  @method loc
+  @for Ember.Templates.helpers
+  @param {String} str The string to format.
+  @see {Ember.String#loc}
+  @public
+*/
+function locHelper(params) {
+  return loc.apply(null, params);
+}
+
+export default helper(locHelper);

packages/ember-glimmer/tests/integration/helpers/loc-test.js

@@ -0,0 +1,39 @@
+import { RenderingTest, moduleFor } from '../../utils/test-case';
+import Ember from 'ember-metal/core';
+
+moduleFor('Helpers test: {{loc}}', class extends RenderingTest {
+
+  constructor() {
+    super();
+    this.oldString = Ember.STRINGS;
+    Ember.STRINGS = {
+      '_Howdy Friend': 'Hallo Freund'
+    };
+  }
+
+  teardown() {
+    Ember.STRINGS = this.oldString;
+  }
+
+  ['@test it lets the original value through by default']() {
+    this.render(`{{loc "Hiya buddy!"}}`);
+    this.assertText('Hiya buddy!', 'the unlocalized string is correct');
+    this.runTask(() => this.rerender());
+    this.assertText('Hiya buddy!', 'the unlocalized string is correct after rerender');
+  }
+
+  ['@test it localizes a simple string']() {
+    this.render(`{{loc "_Howdy Friend"}}`);
+    this.assertText('Hallo Freund', 'the localized string is correct');
+    this.runTask(() => this.rerender());
+    this.assertText('Hallo Freund', 'the localized string is correct after rerender');
+  }
+
+  ['@test it takes passed formats into an account']() {
+    this.render(`{{loc "%@, %@" "Hello" "Mr. Pitkin"}}`);
+    this.assertText('Hello, Mr. Pitkin', 'the formatted string is correct');
+    this.runTask(() => this.rerender());
+    this.assertText('Hello, Mr. Pitkin', 'the formatted string is correct after rerender');
+  }
+
+});

packages/ember-htmlbars/lib/helpers/loc.js

@@ -0,0 +1 @@
+../../../ember-glimmer/lib/helpers/loc.js