[fix] time range detection

tests/unit/engines/test_deviantart.py

@@ -10,6 +10,7 @@ class TestDeviantartEngine(SearxTestCase):
         query = 'test_query'
         dicto = defaultdict(dict)
         dicto['pageno'] = 0
+        dicto['time_range'] = ''
         params = deviantart.request(query, dicto)
         self.assertTrue('url' in params)
         self.assertTrue(query in params['url'])

tests/unit/engines/test_duckduckgo.py

@@ -12,6 +12,7 @@ class TestDuckduckgoEngine(SearxTestCase):
         dicto = defaultdict(dict)
         dicto['pageno'] = 1
         dicto['language'] = 'de_CH'
+        dicto['time_range'] = ''
         params = duckduckgo.request(query, dicto)
         self.assertIn('url', params)
         self.assertIn(query, params['url'])

tests/unit/engines/test_google.py

@@ -19,6 +19,7 @@ class TestGoogleEngine(SearxTestCase):
         dicto = defaultdict(dict)
         dicto['pageno'] = 1
         dicto['language'] = 'fr_FR'
+        dicto['time_range'] = ''
         params = google.request(query, dicto)
         self.assertIn('url', params)
         self.assertIn(query, params['url'])

tests/unit/engines/test_google_images.py

@@ -11,6 +11,7 @@ class TestGoogleImagesEngine(SearxTestCase):
         dicto = defaultdict(dict)
         dicto['pageno'] = 1
         dicto['safesearch'] = 1
+        dicto['time_range'] = ''
         params = google_images.request(query, dicto)
         self.assertIn('url', params)
         self.assertIn(query, params['url'])

tests/unit/engines/test_yahoo.py

@@ -28,6 +28,7 @@ class TestYahooEngine(SearxTestCase):
         query = 'test_query'
         dicto = defaultdict(dict)
         dicto['pageno'] = 1
+        dicto['time_range'] = ''
         dicto['language'] = 'fr_FR'
         params = yahoo.request(query, dicto)
         self.assertIn('url', params)