Bugs fix and improvement of the coverage.

All fixes done are basically CSS selection corrections due to few changing in the HTML structure of pages.

modules/imdb/test.py

@@ -19,39 +19,45 @@
 
 from weboob.tools.test import BackendTest
 
-
 class ImdbTest(BackendTest):
     BACKEND = 'imdb'
 
     def test_search_movie(self):
         movies = list(self.backend.iter_movies('spiderman'))
+        assert len(movies) > 0
         for movie in movies:
             assert movie.id
 
     def test_get_movie(self):
         movie = self.backend.get_movie('tt0079980')
+        assert movie
         assert movie.id
         assert movie.original_title
 
     def test_search_person(self):
         persons = list(self.backend.iter_persons('dewaere'))
+        assert len(persons) > 0
         for person in persons:
             assert person.id
 
     def test_get_person(self):
         person = self.backend.get_person('nm0223033')
+        assert person
         assert person.id
         assert person.name
         assert person.birth_date
 
     def test_movie_persons(self):
         persons = list(self.backend.iter_movie_persons('tt0079980'))
+        assert len(persons) > 0
         for person in persons:
             assert person.id
             assert person.name
+            assert person.short_description
 
     def test_person_movies(self):
         movies = list(self.backend.iter_person_movies('nm0223033'))
+        assert len(movies) > 0
         for movie in movies:
             assert movie.id
             assert movie.original_title
@@ -62,6 +68,19 @@ class ImdbTest(BackendTest):
         assert bio is not None
 
     def test_get_movie_releases(self):
-        rel = self.backend.get_movie_releases('tt0079980')
+        rel = self.backend.get_movie_releases('tt0079980', 'fr')
         assert rel != ''
         assert rel is not None
+        assert rel == 'France : 25 April 1979'
+
+    def test_iter_person_movies_ids(self):
+        movies_ids = list(self.backend.iter_person_movies_ids('nm0223033'))
+        assert len(movies_ids) > 0
+        for movie_id in movies_ids:
+            assert movie_id
+
+    def test_iter_movie_persons_ids(self):
+        persons_ids = list(self.backend.iter_movie_persons_ids('tt0079980'))
+        assert len(persons_ids) > 0
+        for person_id in persons_ids:
+            assert person_id