Move translation logic from js helper to localization object

src/mibew/js/source/default/handlebars_helpers.js

@@ -61,17 +61,13 @@
      * </code>
      * where:
      *   - "localization.string" is localization constant.
-     *   - arg* are arguments that will be passed to getlocal function. There
-     *     can be arbitrary number of such arguments.
+     *   - arg* are arguments that will replace the placeholders.
      */
     Handlebars.registerHelper('l10n', function() {
-        var key = arguments[0],
-            placeholders = Array.prototype.slice.call(arguments, 1),
-            localized = (Mibew.Localization.trans(key) || '');
+        var l = Mibew.Localization,
+            slice = Array.prototype.slice;
 
-        return localized.replace(/\{([0-9]+)\}/g, function(match, index) {
-            return placeholders[parseInt(index)] || '';
-        });
+        return l.trans.apply(l, slice.call(arguments));
     });
 
     /**

src/mibew/js/source/default/localization.js

@@ -30,15 +30,24 @@
     var localStrings = {};
 
     /**
-     * Localize string
-     * @param {String} str String for localization
-     * @returns {String} Localized string
+     * Localize string.
+     *
+     * @param {String} str String for localization.
+     * @param {...String} placeholder A value that will replace a placeholder.
+     * @returns {String} Localized string.
      */
     Mibew.Localization.trans = function(str) {
         if (! localStrings.hasOwnProperty(str)) {
             return false;
         }
-        return localStrings[str];
+
+        // Replace "{n}" style placeholders with specified arguments. The first
+        // argument is skipped because it is the localized string.
+        var placeholders = Array.prototype.slice.call(arguments, 1);
+
+        return localStrings[str].replace(/\{([0-9]+)\}/g, function(match, index) {
+            return placeholders[parseInt(index)] || '';
+        });
     }
 
     /**

src/tests/client_side/qunit/index.html

@@ -10,20 +10,39 @@
         <div id="qunit"></div>
         <div id="qunit-fixture"></div>
 
+        <!-- Add external libraries -->
+        <script type="text/javascript" src="/mibew/js/libs/json2.js"></script>
+        <script type="text/javascript" src="/mibew/js/libs/handlebars.min.js"></script>
+        <script type="text/javascript" src="/mibew/js/libs/underscore-min.js"></script>
+
         <!-- Setup fixture -->
         <script type="text/javascript">
             Mibew = {};
         </script>
 
         <!-- Start of the mibew_api.js tests -->
-        <script type="text/javascript" src="/mibew/js/libs/json2.js"></script>
         <script type="text/javascript" src="/mibew/js/compiled/mibewapi.js"></script>
         <script type="text/javascript" src="test_cases/mibewapi_tests.js"></script>
         <!-- End of the mibew_api.js tests -->
 
+        <!-- Setup fixture -->
+        <script type="text/javascript">
+            // Clean up environment
+            Mibew = {};
+        </script>
+
+        <!-- Start of the localization.js tests -->
+        <script type="text/javascript" src="/mibew/js/compiled/default/localization.js"></script>
+        <script type="text/javascript" src="test_cases/localization_tests.js"></script>
+        <!-- End of the localization.js tests -->
+
+        <!-- Setup fixture -->
+        <script type="text/javascript">
+            // Clean up environment
+            Mibew = {};
+        </script>
+
         <!-- Start of Handlebars' helpers tests -->
-        <script type="text/javascript" src="/mibew/js/libs/handlebars.min.js"></script>
-        <script type="text/javascript" src="/mibew/js/libs/underscore-min.js"></script>
         <script type="text/javascript" src="/mibew/js/compiled/default/localization.js"></script>
         <script type="text/javascript" src="/mibew/js/compiled/default/handlebars_helpers.js"></script>
         <script type="text/javascript" src="test_cases/handlebars_helpers_tests.js"></script>

src/tests/client_side/qunit/test_cases/localization_tests.js

@@ -0,0 +1,22 @@
+// Testing Localization system
+module('Localization');
+
+test('Basic things', function() {
+    // Fill localization container
+    Mibew.Localization.set({
+        one: 'uno',
+        'Hello {0}, {1} and {2}!': '¡Hola {0}, {1} y {2}!'
+    });
+
+    equal(
+        Mibew.Localization.trans('one'),
+        'uno',
+        'Test simple string'
+    );
+
+    equal(
+        Mibew.Localization.trans('Hello {0}, {1} and {2}!', 'Foo', 'Bar', 'Baz'),
+        '¡Hola Foo, Bar y Baz!',
+        'Test placeholders'
+    );
+});