test_django_setup_sequence: test that apps are not loaded in project …

…pytest_configure

Basically the test from
#538.

tests/test_django_settings_module.py

@@ -324,13 +324,23 @@ def test_anything():
             print('TEST: populating=%r,ready=%r' % (populating, apps.ready))
         """)
 
+    django_testdir.makeconftest('''
+        def pytest_configure():
+            import django.apps
+
+            assert not django.apps.apps.ready, 'django.setup() was not called'
+
+            print("pytest_configure")
+    ''')
+
     result = django_testdir.runpytest_subprocess('-s', '--tb=line')
     result.stdout.fnmatch_lines(['*IMPORT: populating=True,ready=False*'])
     result.stdout.fnmatch_lines(['*READY(): populating=True*'])
     if django.VERSION < (2, 0):
         result.stdout.fnmatch_lines(['*TEST: populating=False,ready=True*'])
     else:
         result.stdout.fnmatch_lines(['*TEST: populating=True,ready=True*'])
+    result.stdout.fnmatch_lines(['pytest_configure'])
     assert result.ret == 0