Refs #36936 - Adjusted tests to set PYTHON_COLORS environment variable.

When "FORCE_COLOR" was set in the environment (such as in django-docker-box)
several test cases that rely on string comparisons against exception
messages or command line results would fail due to ANSI escape sequences
being present in the output. This change resolved the issue by setting
the "PYTHON_COLORS" environment variable to "0" for those specific tests,
which takes precendence over the presence of "FORCE_COLOR".

Author: pmppk

tests/admin_scripts/tests.py

@@ -134,6 +134,7 @@ def run_test(self, args, settings_file=None, apps=None, umask=-1):
         python_path.extend(ext_backend_base_dirs)
         test_environ["PYTHONPATH"] = os.pathsep.join(python_path)
         test_environ["PYTHONWARNINGS"] = ""
+        test_environ["PYTHON_COLORS"] = "0"
 
         p = subprocess.run(
             [sys.executable, *args],
@@ -2551,6 +2552,7 @@ def _test(self, args, option_b="'2'"):
         )
 
 
+@mock.patch.dict(os.environ, {"PYTHON_COLORS": "0"})
 class ExecuteFromCommandLine(SimpleTestCase):
     def test_program_name_from_argv(self):
         """

tests/test_runner/test_debug_sql.py

@@ -1,4 +1,5 @@
 import logging
+import os
 import unittest
 from io import StringIO
 from time import time
@@ -183,6 +184,7 @@ def test_log_record_sql_extra_none(self):
 @unittest.skipUnless(
     connection.vendor == "sqlite", "Only run on sqlite so we can check output SQL."
 )
+@mock.patch.dict(os.environ, {"PYTHON_COLORS": "0"})
 class TestDebugSQL(unittest.TestCase):
     class PassingTest(TestCase):
         def runTest(self):

tests/test_utils/test_simpletestcase.py

@@ -1,3 +1,4 @@
+import os
 import unittest
 from io import StringIO
 from unittest import mock
@@ -19,6 +20,7 @@ def skipped_test(self):
         pass
 
 
+@mock.patch.dict(os.environ, {"PYTHON_COLORS": "0"})
 @mock.patch.object(ErrorTestCase, "_post_teardown")
 @mock.patch.object(ErrorTestCase, "_pre_setup")
 class DebugInvocationTests(SimpleTestCase):