add in is_featured based on lang and app (bug #433673)

apps/api/templates/api/includes/addon.xml

@@ -115,6 +115,7 @@
     </last_updated>
     <homepage>{{ addon.homepage }}</homepage>
     <support>{{ addon.support_url }}</support>
+    <featured>{{ addon.is_featured(request.APP, request.LANG)|int }}</featured>
   {%- endif -%}
 </addon>
 {% endcache %}

apps/api/tests/test_legacy.py

@@ -1,4 +1,5 @@
 # -*- coding: utf8 -*-
+from datetime import datetime, timedelta
 import json
 import os
 
@@ -14,7 +15,7 @@ from nose.tools import eq_
 import amo
 import api
 import api.utils
-from addons.models import Addon
+from addons.models import Addon, Feature
 from amo import helpers
 from amo.urlresolvers import reverse
 from search.tests import SphinxTestCase
@@ -117,6 +118,10 @@ class APITest(TestCase):
     fixtures = ['base/apps', 'base/addon_3615', 'base/addon_4664_twitterbar',
                 'base/addon_5299_gcal']
 
+    def setUp(self):
+        if hasattr(Addon, '_feature'):
+            delattr(Addon, '_feature')
+
     def test_api_caching(self):
         response = self.client.get('/en-US/firefox/api/1.5/addon/3615')
         eq_(response.status_code, 200)
@@ -353,6 +358,23 @@ class APITest(TestCase):
                             status_code=503)
     test_sphinx_off.sphinx = True
 
+    def test_is_featured(self):
+        self.assertContains(make_call('addon/5299', version=1.5),
+                            '<featured>0</featured>')
+        Feature.objects.create(addon_id=5299,
+                               start=datetime.now() - timedelta(days=10),
+                               end=datetime.now() + timedelta(days=10),
+                               application_id=amo.FIREFOX.id,
+                               locale='ja')
+        for lang, app, result in [('ja', 'firefox', 1),
+                                  ('en-US', 'firefox', 0),
+                                  ('ja', 'seamonkey', 0)]:
+            # Clean out the special cache for feature.
+            delattr(Addon, '_feature')
+            self.assertContains(make_call('addon/5299', version=1.5,
+                                          lang=lang, app=app),
+                                '<featured>%s</featured>' % result)
+
 
 class ListTest(TestCase):
     """Tests the list view with various urls."""