Adapt pyrepl discovery to the new transparent reality

Author: ambv

Lib/test/support/__init__.py

@@ -2929,12 +2929,6 @@ def make_clean_env() -> dict[str, str]:
     return clean_env
 
 
-def initialized_with_pyrepl():
-    """Detect whether PyREPL was used during Python initialization."""
-    # If the main module has a __file__ attribute it's a Python module, which means PyREPL.
-    return hasattr(sys.modules["__main__"], "__file__")
-
-
 WINDOWS_STATUS = {
     0xC0000005: "STATUS_ACCESS_VIOLATION",
     0xC00000FD: "STATUS_STACK_OVERFLOW",

Lib/test/test_pyrepl/test_pyrepl.py

@@ -1400,23 +1400,19 @@ def test_inspect_keeps_globals_from_inspected_module(self):
     @force_not_colorized
     def test_python_basic_repl(self):
         env = os.environ.copy()
-        commands = ("from test.support import initialized_with_pyrepl\n"
-                    "initialized_with_pyrepl()\n"
-                    "exit()\n")
-
+        pyrepl_commands = "clear\nexit()\n"
         env.pop("PYTHON_BASIC_REPL", None)
-        output, exit_code = self.run_repl(commands, env=env, skip=True)
+        output, exit_code = self.run_repl(pyrepl_commands, env=env, skip=True)
         self.assertEqual(exit_code, 0)
-        self.assertIn("True", output)
-        self.assertNotIn("False", output)
         self.assertNotIn("Exception", output)
+        self.assertNotIn("NameError", output)
         self.assertNotIn("Traceback", output)
 
+        basic_commands = "help\nexit()\n"
         env["PYTHON_BASIC_REPL"] = "1"
-        output, exit_code = self.run_repl(commands, env=env)
+        output, exit_code = self.run_repl(basic_commands, env=env)
         self.assertEqual(exit_code, 0)
-        self.assertIn("False", output)
-        self.assertNotIn("True", output)
+        self.assertIn("Type help() for interactive help", output)
         self.assertNotIn("Exception", output)
         self.assertNotIn("Traceback", output)