[3.13] gh-82378 fix sys.tracebacklimit in pyrepl, approach 2 (GH-123062) (#123252)

Make sure that pyrepl uses the same logic for sys.tracebacklimit as both
the basic repl and the standard sys.excepthook
(cherry picked from commit 63603bca35798c166e1b8e0be76aef69217f8b1b)

1 files changed, 33 insertions, 1 deletions

diff --git a/Lib/test/test_pyrepl/test_pyrepl.py b/Lib/test/test_pyrepl/test_pyrepl.py
index 9944cd0..b03cf13 100644
--- a/Lib/test/test_pyrepl/test_pyrepl.py
+++ b/Lib/test/test_pyrepl/test_pyrepl.py
@@ -1020,7 +1020,7 @@ class TestMain(TestCase):
         env.update({"TERM": "dumb"})
         output, exit_code = self.run_repl("exit()\n", env=env)
         self.assertEqual(exit_code, 0)
-        self.assertIn("warning: can\'t use pyrepl", output)
+        self.assertIn("warning: can't use pyrepl", output)
         self.assertNotIn("Exception", output)
         self.assertNotIn("Traceback", output)
 
@@ -1114,6 +1114,38 @@ class TestMain(TestCase):
         self.assertIn("IndentationError: unexpected indent", output)
         self.assertIn("<python-input-0>", output)
 
+    @force_not_colorized
+    def test_proper_tracebacklimit(self):
+        env = os.environ.copy()
+        for set_tracebacklimit in [True, False]:
+            commands = ("import sys\n" +
+                        ("sys.tracebacklimit = 1\n" if set_tracebacklimit else "") +
+                        "def x1(): 1/0\n\n"
+                        "def x2(): x1()\n\n"
+                        "def x3(): x2()\n\n"
+                        "x3()\n"
+                        "exit()\n")
+
+            for basic_repl in [True, False]:
+                if basic_repl:
+                    env["PYTHON_BASIC_REPL"] = "1"
+                else:
+                    env.pop("PYTHON_BASIC_REPL", None)
+                with self.subTest(set_tracebacklimit=set_tracebacklimit,
+                                  basic_repl=basic_repl):
+                    output, exit_code = self.run_repl(commands, env=env)
+                    if "can't use pyrepl" in output:
+                        self.skipTest("pyrepl not available")
+                    self.assertIn("in x1", output)
+                    if set_tracebacklimit:
+                        self.assertNotIn("in x2", output)
+                        self.assertNotIn("in x3", output)
+                        self.assertNotIn("in <module>", output)
+                    else:
+                        self.assertIn("in x2", output)
+                        self.assertIn("in x3", output)
+                        self.assertIn("in <module>", output)
+
     def run_repl(
         self,
         repl_input: str | list[str],