[test] force rendering of ANSI colors for non-tty objects (#12036)

Author: nedbat

tests/test_util/test_util_display.py

@@ -34,7 +34,8 @@ def test_status_iterator_length_0(app, status, warning):
 
 
 @pytest.mark.sphinx('dummy')
-def test_status_iterator_verbosity_0(app, status, warning):
+def test_status_iterator_verbosity_0(app, status, warning, monkeypatch):
+    monkeypatch.setenv("FORCE_COLOR", 1)
     logging.setup(app, status, warning)
 
     # test for status_iterator (verbosity=0)
@@ -50,7 +51,8 @@ def test_status_iterator_verbosity_0(app, status, warning):
 
 
 @pytest.mark.sphinx('dummy')
-def test_status_iterator_verbosity_1(app, status, warning):
+def test_status_iterator_verbosity_1(app, status, warning, monkeypatch):
+    monkeypatch.setenv("FORCE_COLOR", 1)
     logging.setup(app, status, warning)
 
     # test for status_iterator (verbosity=1)