Migrate cube to Python3

- Fix errors:
  - TypeError: 'float' object cannot be interpreted as an integer

- Fix deprecation warnings:
  - DeprecationWarning: Please use assertEqual instead
  - DeprecationWarning: Please use assertTrue instead

cubicweb_elasticsearch/views.py

@@ -228,7 +228,7 @@ class ElasticSearchView(StartupView):
                             href=xml_escape(self._cw.build_url(**url_params)))))
             else:
                 ul(t.li(t.a(self.previous_link)))
-            total_pages = min((response.hits.total / 10) + 2, 1000)
+            total_pages = min((response.hits.total // 10) + 2, 1000)
             page_padding = 3
 
             if current_page > page_padding:

test/test_elastic_search.py

@@ -64,7 +64,7 @@ class ExportElasticSearchTC(testlib.AutoPopulateTest):
             ccplugin.IndexInES(None).main_run(cmd)
         finally:
             sys.stdout = sys.__stdout__
-        self.assertEquals('', out.getvalue())
+        self.assertEqual('', out.getvalue())
         create.assert_not_called()
         bulk.assert_not_called()
 
@@ -78,7 +78,7 @@ class ExportElasticSearchTC(testlib.AutoPopulateTest):
         finally:
             sys.stdout = sys.__stdout__
         with self.admin_access.repo_cnx() as cnx:
-            self.assert_(cnx.execute('Any X WHERE X is %(etype)s' %
+            self.assertTrue(cnx.execute('Any X WHERE X is %(etype)s' %
                                      {'etype': self.tested_etype}))
         # TODO - put this somewhere where it tests on the first get_connection
         # create.assert_called_with(ignore=400,