Fixing test by using six.assertCountEqual (#22219)

* using six.assertCountEqual

* Fix type mismatches in css migrations

common/lib/xmodule/xmodule/tests/test_capa_module.py

@@ -2507,8 +2507,8 @@ class ProblemBlockXMLTest(unittest.TestCase):
         name = "Other Test Capa Problem"
         descriptor = self._create_descriptor(xml, name=name)
         self.assertEqual(descriptor.problem_types, {"multiplechoiceresponse", "optionresponse"})
-        self.assertEqual(
-            descriptor.index_dictionary(), {
+        six.assertCountEqual(
+            self, descriptor.index_dictionary(), {
                 'content_type': ProblemBlock.INDEX_CONTENT_TYPE,
                 'problem_types': ["optionresponse", "multiplechoiceresponse"],
                 'content': {

lms/djangoapps/ccx/migrations/0001_initial.py

@@ -19,7 +19,7 @@ class Migration(migrations.Migration):
                 ('id', models.AutoField(verbose_name='ID', serialize=False, auto_created=True, primary_key=True)),
                 ('location', UsageKeyField(max_length=255, db_index=True)),
                 ('field', models.CharField(max_length=255)),
-                ('value', models.TextField(default=b'null')),
+                ('value', models.TextField(default=u'null')),
             ],
         ),
         migrations.CreateModel(

lms/djangoapps/ccx/migrations/0002_customcourseforedx_structure_json.py

@@ -14,6 +14,6 @@ class Migration(migrations.Migration):
         migrations.AddField(
             model_name='customcourseforedx',
             name='structure_json',
-            field=models.TextField(null=True, verbose_name=b'Structure JSON', blank=True),
+            field=models.TextField(null=True, verbose_name=u'Structure JSON', blank=True),
         ),
     ]

lms/djangoapps/ccx/models.py

@@ -32,7 +32,7 @@ class CustomCourseForEdX(models.Model):
     coach = models.ForeignKey(User, db_index=True, on_delete=models.CASCADE)
     # if not empty, this field contains a json serialized list of
     # the master course modules
-    structure_json = models.TextField(verbose_name='Structure JSON', blank=True, null=True)
+    structure_json = models.TextField(verbose_name=u'Structure JSON', blank=True, null=True)
 
     class Meta(object):
         app_label = 'ccx'
@@ -120,4 +120,4 @@ class CcxFieldOverride(models.Model):
         app_label = 'ccx'
         unique_together = (('ccx', 'location', 'field'),)
 
-    value = models.TextField(default='null')
+    value = models.TextField(default=u'null')