TE-2525 nose.tools removal part 1/2

lms/djangoapps/instructor_analytics/tests/test_csvs.py

@@ -1,7 +1,7 @@
 """ Tests for analytics.csvs """
 
+import pytest
 from django.test import TestCase
-from nose.tools import raises
 
 from instructor_analytics.csvs import create_csv_response, format_dictlist, format_instances
 
@@ -124,6 +124,6 @@ class TestAnalyticsFormatInstances(TestCase):
         self.assertEqual(header, [])
         self.assertEqual(datarows, [[] for _ in xrange(len(self.instances))])
 
-    @raises(AttributeError)
     def test_format_instances_response_nonexistantfeature(self):
-        format_instances(self.instances, ['robot_not_a_real_feature'])
+        with pytest.raises(AttributeError):
+            format_instances(self.instances, ['robot_not_a_real_feature'])

lms/djangoapps/instructor_analytics/tests/test_distributions.py

@@ -1,7 +1,7 @@
 """ Tests for analytics.distributions """
 
+import pytest
 from django.test import TestCase
-from nose.tools import raises
 from opaque_keys.edx.locator import CourseLocator
 
 from instructor_analytics.distributions import AVAILABLE_PROFILE_FEATURES, profile_distribution
@@ -26,11 +26,11 @@ class TestAnalyticsDistributions(TestCase):
         self.ces = [CourseEnrollment.enroll(user, self.course_id)
                     for user in self.users]
 
-    @raises(ValueError)
     def test_profile_distribution_bad_feature(self):
         feature = 'robot-not-a-real-feature'
         self.assertNotIn(feature, AVAILABLE_PROFILE_FEATURES)
-        profile_distribution(self.course_id, feature)
+        with pytest.raises(ValueError):
+            profile_distribution(self.course_id, feature)
 
     def test_profile_distribution_easy_choice(self):
         feature = 'gender'