1 patch select to prevent tests failing when when the test suite is run in parallel mode the tests are run in a subprocess and the subprocess s stdin is closed and replaced by devnull reading from devnull always returns eof and so select always shows that sys stdin is ready to read this causes problems because of the call to select select toward the end of shell s handle method 1 1 1 1 1 patch select to prevent tests failing when when the test suite is run in parallel mode the tests are run in a subprocess and the subprocess s stdin is closed and replaced by dev null reading from dev null always returns eof and so select always shows that sys stdin is ready to read this causes problems because of the call to select select toward the end of shell s handle method
import sys
import unittest
from unittest import mock

from django import __version__
from django.core.management import CommandError, call_command
from django.test import SimpleTestCase
from django.test.utils import captured_stdin, captured_stdout


class ShellCommandTestCase(SimpleTestCase):
    script_globals = 'print("__name__" in globals())'
    script_with_inline_function = (
        "import django\ndef f():\n    print(django.__version__)\nf()"
    )

    def test_command_option(self):
        with self.assertLogs("test", "INFO") as cm:
            call_command(
                "shell",
                command=(
                    "import django; from logging import getLogger; "
                    'getLogger("test").info(django.__version__)'
                ),
            )
        self.assertEqual(cm.records[0].getMessage(), __version__)

    def test_command_option_globals(self):
        with captured_stdout() as stdout:
            call_command("shell", command=self.script_globals)
        self.assertEqual(stdout.getvalue().strip(), "True")

    def test_command_option_inline_function_call(self):
        with captured_stdout() as stdout:
            call_command("shell", command=self.script_with_inline_function)
        self.assertEqual(stdout.getvalue().strip(), __version__)

    @unittest.skipIf(
        sys.platform == "win32", "Windows select() doesn't support file descriptors."
    )
    @mock.patch("django.core.management.commands.shell.select")
    def test_stdin_read(self, select):
        with captured_stdin() as stdin, captured_stdout() as stdout:
            stdin.write("print(100)\n")
            stdin.seek(0)
            call_command("shell")
        self.assertEqual(stdout.getvalue().strip(), "100")

    @unittest.skipIf(
        sys.platform == "win32",
        "Windows select() doesn't support file descriptors.",
    )
    @mock.patch("django.core.management.commands.shell.select")  
    def test_stdin_read_globals(self, select):
        with captured_stdin() as stdin, captured_stdout() as stdout:
            stdin.write(self.script_globals)
            stdin.seek(0)
            call_command("shell")
        self.assertEqual(stdout.getvalue().strip(), "True")

    @unittest.skipIf(
        sys.platform == "win32",
        "Windows select() doesn't support file descriptors.",
    )
    @mock.patch("django.core.management.commands.shell.select")  
    def test_stdin_read_inline_function_call(self, select):
        with captured_stdin() as stdin, captured_stdout() as stdout:
            stdin.write(self.script_with_inline_function)
            stdin.seek(0)
            call_command("shell")
        self.assertEqual(stdout.getvalue().strip(), __version__)

    @mock.patch("django.core.management.commands.shell.select.select")  
    @mock.patch.dict("sys.modules", {"IPython": None})
    def test_shell_with_ipython_not_installed(self, select):
        select.return_value = ([], [], [])
        with self.assertRaisesMessage(
            CommandError, "Couldn't import ipython interface."
        ):
            call_command("shell", interface="ipython")

    @mock.patch("django.core.management.commands.shell.select.select")  
    @mock.patch.dict("sys.modules", {"bpython": None})
    def test_shell_with_bpython_not_installed(self, select):
        select.return_value = ([], [], [])
        with self.assertRaisesMessage(
            CommandError, "Couldn't import bpython interface."
        ):
            call_command("shell", interface="bpython")