test: migrating from nose to pytest

this commit is part of part of supporting Django 3.2
upgrade, for more context: edx/upgrades#68, the changes are:
1. Removing nose as a tool for testing
2. Adding pytest as the alternative
3. Updating the requirments to reflect 1 and 2
4  Adding a test which tests the deafult value of the Xblock model

invideoquiz/settings.py

@@ -9,10 +9,4 @@
     },
 }
 
-TEST_RUNNER = 'django_nose.NoseTestSuiteRunner'
-
-INSTALLED_APPS = (
-    'django_nose',
-)
-
 SECRET_KEY = 'invideoquiz_SECRET_KEY'

invideoquiz/tests/test_invideoquiz_view.py

@@ -0,0 +1,15 @@
+from xblock.test.tools import TestRuntime as Runtime
+from xblock.runtime import DictKeyValueStore, KvsFieldData
+from invideoquiz import InVideoQuizXBlock
+from unittest.mock import Mock
+
+
+def test_invideoquiz_model():
+    """Tests for the default fields value of invideoquiz"""
+    key_store = DictKeyValueStore()
+    field_data = KvsFieldData(key_store)
+    runtime = Runtime(services={'field-data': field_data})
+    instance = InVideoQuizXBlock(runtime, scope_ids=Mock())
+    assert instance.display_name == 'In-Video Quiz XBlock'
+    assert instance.timemap == '{}'
+    assert instance.video_id == ''

requirements/base.in

@@ -2,7 +2,6 @@
 -c constraints.txt
 
 Django
-django_nose
 six
 XBlock
 xblock-utils

requirements/base.txt

@@ -10,8 +10,6 @@ django==2.2.24
     # via
     #   -c requirements/common_constraints.txt
     #   -r requirements/base.in
-django-nose==1.4.7
-    # via -r requirements/base.in
 fs==2.4.13
     # via xblock
 lxml==4.6.3
@@ -22,8 +20,6 @@ markupsafe==2.0.1
     # via
     #   mako
     #   xblock
-nose==1.3.7
-    # via django-nose
 python-dateutil==2.8.2
     # via xblock
 pytz==2021.1

requirements/quality.txt

@@ -10,18 +10,24 @@ appdirs==1.4.4
     #   fs
 astroid==2.7.3
     # via pylint
+attrs==21.2.0
+    # via
+    #   -r requirements/test.txt
+    #   pytest
 coverage==5.5
     # via -r requirements/test.txt
 django==2.2.24
     # via
     #   -c requirements/common_constraints.txt
     #   -r requirements/base.txt
-django-nose==1.4.7
-    # via -r requirements/base.txt
 fs==2.4.13
     # via
     #   -r requirements/base.txt
     #   xblock
+iniconfig==1.1.1
+    # via
+    #   -r requirements/test.txt
+    #   pytest
 isort==5.9.3
     # via pylint
 lazy-object-proxy==1.6.0
@@ -43,16 +49,34 @@ mccabe==0.6.1
     # via pylint
 mock==4.0.3
     # via -r requirements/test.txt
-nose==1.3.7
+packaging==21.0
     # via
-    #   -r requirements/base.txt
-    #   django-nose
+    #   -r requirements/test.txt
+    #   pytest
 platformdirs==2.3.0
     # via pylint
+pluggy==1.0.0
+    # via
+    #   -r requirements/test.txt
+    #   pytest
+py==1.10.0
+    # via
+    #   -r requirements/test.txt
+    #   pytest
 pycodestyle==2.7.0
     # via -r requirements/quality.in
 pylint==2.10.2
     # via -r requirements/quality.in
+pyparsing==2.4.7
+    # via
+    #   -r requirements/test.txt
+    #   packaging
+pytest==6.2.5
+    # via
+    #   -r requirements/test.txt
+    #   pytest-django
+pytest-django==4.4.0
+    # via -r requirements/test.txt
 python-dateutil==2.8.2
     # via
     #   -r requirements/base.txt
@@ -81,7 +105,10 @@ sqlparse==0.4.1
     #   -r requirements/base.txt
     #   django
 toml==0.10.2
-    # via pylint
+    # via
+    #   -r requirements/test.txt
+    #   pylint
+    #   pytest
 web-fragments==1.1.0
     # via
     #   -r requirements/base.txt

requirements/test.in

@@ -2,3 +2,4 @@
 
 coverage
 mock
+pytest-django

requirements/test.txt

@@ -4,7 +4,25 @@
 #
 #    make upgrade
 #
+attrs==21.2.0
+    # via pytest
 coverage==5.5
     # via -r requirements/test.in
+iniconfig==1.1.1
+    # via pytest
 mock==4.0.3
     # via -r requirements/test.in
+packaging==21.0
+    # via pytest
+pluggy==1.0.0
+    # via pytest
+py==1.10.0
+    # via pytest
+pyparsing==2.4.7
+    # via packaging
+pytest==6.2.5
+    # via pytest-django
+pytest-django==4.4.0
+    # via -r requirements/test.in
+toml==0.10.2
+    # via pytest

setup.cfg

@@ -1,6 +1,3 @@
 [metadata]
 description-file = README.markdown
 
-[nosetests]
-cover-package=invideoquiz
-cover-tests=1

tox.ini

@@ -9,7 +9,7 @@ deps =
 	django31: Django>=3.1,<3.2
 	-rrequirements/test.txt
 commands = 
-	python manage.py test
+	pytest
 
 [testenv:quality]
 deps = 
@@ -21,9 +21,6 @@ commands =
 [testenv:coverage]
 deps = 
 	-rrequirements/test.txt
-setenv = 
-	NOSE_COVER_TESTS=1
-	NOSE_WITH_COVERAGE=1
 commands = 
-	{envpython} manage.py test
+	coverage run -m pytest