More tests.

responsive/conf.py

@@ -63,6 +63,9 @@ class ResponsiveAppConf(AppConf):
             'verbose_name': _('XXLarge screens'),
             'min_width': 1921,
             'max_width': None,
+        },
+        'retina': {
+            'pixel_ratio': 2
         }
     }
 

tests/test_utils.py

@@ -0,0 +1,77 @@
+#!/usr/bin/env python
+# -*- coding: utf-8 -*-
+
+from django.core.exceptions import ImproperlyConfigured
+from django.test import TestCase
+from django.test.client import RequestFactory
+from django.test.utils import override_settings
+from django.utils.translation import ugettext_lazy as _
+from django.core.cache import cache
+
+from responsive.conf import settings
+from responsive.utils import Device
+
+
+
+class UtilsTest(TestCase):
+
+    def setUp(self):
+        # Every test needs access to the request factory.
+        self.factory = RequestFactory()
+
+    # Implement assertIsNotNone for Python runtimes < 2.7 or < 3.1
+    if not hasattr(TestCase, 'assertIsNotNone'):
+        def assertIsNotNone(self, value, *args):
+            self.assertNotEqual(value, None, *args)
+
+    def test_device_obj_str(self):
+        device = Device()
+        self.assertEqual(str(device), 'Device :: width=0 height=0 pixel-ratio=1.0')
+
+    def test_device_default_values(self):
+        device = Device()
+        self.assertEqual(device.width, settings.RESPONSIVE_DEFAULT_WIDTH)
+        self.assertEqual(device.height, settings.RESPONSIVE_DEFAULT_HEIGHT)
+        self.assertEqual(device.pixel_ratio, settings.RESPONSIVE_DEFAULT_PIXEL_RATIO)
+
+    @override_settings(RESPONSIVE_MEDIA_QUERIES={
+        'small': {
+            'verbose_name': _('Small screens'),
+            'min_width': 0,
+            'max_width': '640px',
+        },
+    })
+    def test_get_media_queries_fails(self):
+        # get_media_queries() should raise ImproperlyConfigured with above settings
+        device = Device()
+        self.assertRaises(ImproperlyConfigured, device.get_media_queries)
+
+    @override_settings(RESPONSIVE_MEDIA_QUERIES={
+        'small': {
+            'verbose_name': _('Small screens'),
+            'max_width': 640,
+        },
+    })
+    def test_get_media_queries_works(self):
+        # min_width, min_height, max_height, pixel_ratio is not defined in above settings
+        # get_media_queries() should set them to None
+        device = Device()
+        media_queries = device.get_media_queries()
+        for attr in ('min_width', 'min_height', 'max_height', 'pixel_ratio'):
+            self.assertEqual(media_queries['small'][attr], None)
+
+    def test_caching(self):
+        device = Device(width=1366, height=768)
+        # matched devices should be cached
+        self.assertIsNotNone(cache.get(device.cache_key))
+
+        # clear the cache
+        device.clear()
+        self.assertIsNone(cache.get(device.cache_key))
+
+    def test_matched_media_queries(self):
+        device = Device(width=1366, height=768, pixel_ratio=2)
+        self.assertIn('large', device.matched)
+        self.assertIn('retina', device.matched)
+
+