Implement navigator.languages.

LayoutTests/navigator_language/navigator_language.html

Index: LayoutTests/navigator_language/navigator_language.html
diff --git a/LayoutTests/navigator_language/navigator_language.html b/LayoutTests/navigator_language/navigator_language.html
index 1ad57ef6ebfee282993ca7af3bc9d3326d3b3d48..5a92754081ad6e8ab02f8ec250374e98dceda866 100644
--- a/LayoutTests/navigator_language/navigator_language.html
+++ b/LayoutTests/navigator_language/navigator_language.html
@@ -7,7 +7,7 @@
 
 test(function() {
     assert_true('language' in window.navigator);
-    assert_false('languages' in window.navigator);
+    assert_true('languages' in window.navigator);
     assert_true('onlanguagechange' in window);
 }, "Test that NavigatorLanguage API is present in window");
 
@@ -86,6 +86,48 @@ test(function() {
     window.testRunner.setAcceptLanguages('klingon');
 }, "Test properties of the fired event.");
 
+test(function() {
+    var testValues = [
+        { accept_languages: 'foo', language: 'foo', languages: ['foo'] },
+        { accept_languages: '', language: '', languages: [] },
+        { accept_languages: 'foo,bar', language: 'foo', languages: [ 'foo', 'bar' ] },
+        { accept_languages: '  foo , bar ', language: 'foo', languages: [ 'foo', 'bar' ] },
+        { accept_languages: '  foo ; bar ', language: 'foo ; bar', languages: [ 'foo ; bar' ] },
+        { accept_languages: '_foo_', language: '_foo_', languages: ['_foo_'] },
+        { accept_languages: 'en_', language: 'en-', languages: ['en-'] },
+        { accept_languages: 'en__', language: 'en-_', languages: ['en-_'] },
+        { accept_languages: 'en_US, fr_FR', language: 'en-US', languages: ['en-US', 'fr-FR'] },
+        { accept_languages: 'en_US_CA', language: 'en-US_CA', languages: ['en-US_CA'] },
+    ];
+
+    var eventsCount = 0;
+    window.onlanguagechange = function() {
+        eventsCount++;
+    }
+
+    for (var i = 0; i < testValues.length; ++i) {
+        var data = testValues[i];
+
+        window.testRunner.setAcceptLanguages(data.accept_languages);
+        assert_equals(eventsCount, i + 1);
+
+        assert_equals(navigator.languages.length, data.languages.length);
+        // FIXME: test navigator.language
+        for (var j = 0; j < navigator.languages.length; ++j) {
+            assert_equals(navigator.languages[j], data.languages[j]);
+        }
+    }
+}, "Test that navigator.languages reflects the accept languages value.");
+
+test(function() {
+    var previous = navigator.languages;
+    assert_equals(navigator.languages, navigator.languages);
+    assert_equals(navigator.languages, previous);
+
+    window.testRunner.setAcceptLanguages('fr-FR');
+    assert_not_equals(navigator.languages, previous);
+}, "Test that navigator.languages caching behaviour.");
+
 </script>
 </body>
 </html>