Add failing test

Author: johnslavik

Lib/test/test_repl.py

@@ -218,7 +218,7 @@ def make_repl(env):
         with os_helper.temp_dir() as tmpdir:
             script = os.path.join(tmpdir, "pythonstartup.py")
             with open(script, "w") as f:
-                f.write("print('from pythonstartup')" + os.linesep)
+                f.write("print('from pythonstartup')\n")
 
             env = os.environ.copy()
             env['PYTHONSTARTUP'] = script
@@ -295,6 +295,19 @@ def bar(x):
         expected = "(30, None, [\'def foo(x):\\n\', \'    return x + 1\\n\', \'\\n\'], \'<stdin>\')"
         self.assertIn(expected, output, expected)
 
+    def test_asyncio_repl_respects_isolated_mode(self):
+        with os_helper.temp_dir() as tmpdir:
+            script = os.path.join(tmpdir, "pythonstartup.py")
+            with open(script, "w") as f:
+                f.write("print('should not print')\n")
+            env = os.environ.copy()
+            env["PYTHON_HISTORY"] = os.path.join(tmpdir, ".asyncio_history")
+            env["PYTHONSTARTUP"] = script
+            p = spawn_asyncio_repl(isolated=True, env=env)
+            output = kill_python(p)
+            self.assertEqual(p.returncode, 0)
+            self.assertNotIn("should not print", output)
+
     def test_asyncio_repl_reaches_python_startup_script(self):
         with os_helper.temp_dir() as tmpdir:
             script = os.path.join(tmpdir, "pythonstartup.py")