import io import itertools import os import pathlib import rlcompleter import select import subprocess import sys import tempfile from unittest import TestCase, skipUnless from unittest.mock import patch from test.support import force_not_colorized from test.support import SHORT_TIMEOUT from test.support.import_helper import import_module from test.support.os_helper import unlink from .support import ( FakeConsole, handle_all_events, handle_events_narrow_console, more_lines, multiline_input, code_to_events, clean_screen ) from _pyrepl.console import Event from _pyrepl.readline import ReadlineAlikeReader, ReadlineConfig from _pyrepl.readline import multiline_input as readline_multiline_input try: import pty except ImportError: pty = None class TestCursorPosition(TestCase): def prepare_reader(self, events): console = FakeConsole(events) config = ReadlineConfig(readline_completer=None) reader = ReadlineAlikeReader(console=console, config=config) return reader def test_up_arrow_simple(self): # fmt: off code = ( "def f():\n" " ...\n" ) # fmt: on events = itertools.chain( code_to_events(code), [ Event(evt="key", data="up", raw=bytearray(b"\x1bOA")), ], ) reader, console = handle_all_events(events) self.assertEqual(reader.cxy, (0, 1)) console.move_cursor.assert_called_once_with(0, 1) def test_down_arrow_end_of_input(self): # fmt: off code = ( "def f():\n" " ...\n" ) # fmt: on events = itertools.chain( code_to_events(code), [ Event(evt="key", data="down", raw=bytearray(b"\x1bOB")), ], ) reader, console = handle_all_events(events) self.assertEqual(reader.cxy, (0, 2)) console.move_cursor.assert_called_once_with(0, 2) def test_left_arrow_simple(self): events = itertools.chain( code_to_events("11+11"), [ Event(evt="key", data="left", raw=bytearray(b"\x1bOD")), ], ) reader, console = handle_all_events(events) self.assertEqual(reader.cxy, (4, 0)) console.move_cursor.assert_called_once_with(4, 0) def test_right_arrow_end_of_line(self): events = itertools.chain( code_to_events("11+11"), [ Event(evt="key", data="right", raw=bytearray(b"\x1bOC")), ], ) reader, console = handle_all_events(events) self.assertEqual(reader.cxy, (5, 0)) console.move_cursor.assert_called_once_with(5, 0) def test_cursor_position_simple_character(self): events = itertools.chain(code_to_events("k")) reader, _ = handle_all_events(events) self.assertEqual(reader.pos, 1) # 1 for simple character self.assertEqual(reader.cxy, (1, 0)) def test_cursor_position_double_width_character(self): events = itertools.chain(code_to_events("樂")) reader, _ = handle_all_events(events) self.assertEqual(reader.pos, 1) # 2 for wide character self.assertEqual(reader.cxy, (2, 0)) def test_cursor_position_double_width_character_move_left(self): events = itertools.chain( code_to_events("樂"), [ Event(evt="key", data="left", raw=bytearray(b"\x1bOD")), ], ) reader, _ = handle_all_events(events) self.assertEqual(reader.pos, 0) self.assertEqual(reader.cxy, (0, 0)) def test_cursor_position_double_width_character_move_left_right(self): events = itertools.chain( code_to_events("樂"), [ Event(evt="key", data="left", raw=bytearray(b"\x1bOD")), Event(evt="key", data="right", raw=bytearray(b"\x1bOC")), ], ) reader, _ = handle_all_events(events) self.assertEqual(reader.pos, 1) # 2 for wide character self.assertEqual(reader.cxy, (2, 0)) def test_cursor_position_double_width_characters_move_up(self): for_loop = "for _ in _:" # fmt: off code = ( f"{for_loop}\n" " ' 可口可乐; 可口可樂'" ) # fmt: on events = itertools.chain( code_to_events(code), [ Event(evt="key", data="up", raw=bytearray(b"\x1bOA")), ], ) reader, _ = handle_all_events(events) # cursor at end of first line self.assertEqual(reader.pos, len(for_loop)) self.assertEqual(reader.cxy, (len(for_loop), 0)) def test_cursor_position_double_width_characters_move_up_down(self): for_loop = "for _ in _:" # fmt: off code = ( f"{for_loop}\n" " ' 可口可乐; 可口可樂'" ) # fmt: on events = itertools.chain( code_to_events(code), [ Event(evt="key", data="up", raw=bytearray(b"\x1bOA")), Event(evt="key", data="left", raw=bytearray(b"\x1bOD")), Event(evt="key", data="down", raw=bytearray(b"\x1bOB")), ], ) reader, _ = handle_all_events(events) # cursor here (showing 2nd line only): # < ' 可口可乐; 可口可樂'> # ^ self.assertEqual(reader.pos, 19) self.assertEqual(reader.cxy, (10, 1)) def test_cursor_position_multiple_double_width_characters_move_left(self): events = itertools.chain( code_to_events("' 可口可乐; 可口可樂'"), [ Event(evt="key", data="left", raw=bytearray(b"\x1bOD")), Event(evt="key", data="left", raw=bytearray(b"\x1bOD")), Event(evt="key", data="left", raw=bytearray(b"\x1bOD")), ], ) reader, _ = handle_all_events(events) self.assertEqual(reader.pos, 10) # 1 for quote, 1 for space, 2 per wide character, # 1 for semicolon, 1 for space, 2 per wide character self.assertEqual(reader.cxy, (16, 0)) def test_cursor_position_move_up_to_eol(self): first_line = "for _ in _:" second_line = " hello" # fmt: off code = ( f"{first_line}\n" f"{second_line}\n" " h\n" " hel" ) # fmt: on events = itertools.chain( code_to_events(code), [ Event(evt="key", data="up", raw=bytearray(b"\x1bOA")), Event(evt="key", data="up", raw=bytearray(b"\x1bOA")), ], ) reader, _ = handle_all_events(events) # Cursor should be at end of line 1, even though line 2 is shorter # for _ in _: # hello # h # hel self.assertEqual( reader.pos, len(first_line) + len(second_line) + 1 ) # +1 for newline self.assertEqual(reader.cxy, (len(second_line), 1)) def test_cursor_position_move_down_to_eol(self): last_line = " hel" # fmt: off code = ( "for _ in _:\n" " hello\n" " h\n" f"{last_line}" ) # fmt: on events = itertools.chain( code_to_events(code), [ Event(evt="key", data="up", raw=bytearray(b"\x1bOA")), Event(evt="key", data="up", raw=bytearray(b"\x1bOA")), Event(evt="key", data="down", raw=bytearray(b"\x1bOB")), Event(evt="key", data="down", raw=bytearray(b"\x1bOB")), ], ) reader, _ = handle_all_events(events) # Cursor should be at end of line 3, even though line 2 is shorter # for _ in _: # hello # h # hel self.assertEqual(reader.pos, len(code)) self.assertEqual(reader.cxy, (len(last_line), 3)) def test_cursor_position_multiple_mixed_lines_move_up(self): # fmt: off code = ( "def foo():\n" " x = '可口可乐; 可口可樂'\n" " y = 'abckdfjskldfjslkdjf'" ) # fmt: on events = itertools.chain( code_to_events(code), 13 * [Event(evt="key", data="left", raw=bytearray(b"\x1bOD"))], [Event(evt="key", data="up", raw=bytearray(b"\x1bOA"))], ) reader, _ = handle_all_events(events) # By moving left, we're before the s: # y = 'abckdfjskldfjslkdjf' # ^ # And we should move before the semi-colon despite the different offset # x = '可口可乐; 可口可樂' # ^ self.assertEqual(reader.pos, 22) self.assertEqual(reader.cxy, (15, 1)) def test_cursor_position_after_wrap_and_move_up(self): # fmt: off code = ( "def foo():\n" " hello" ) # fmt: on events = itertools.chain( code_to_events(code), [ Event(evt="key", data="up", raw=bytearray(b"\x1bOA")), ], ) reader, _ = handle_events_narrow_console(events) # The code looks like this: # def foo()\ # : # hello # After moving up we should be after the colon in line 2 self.assertEqual(reader.pos, 10) self.assertEqual(reader.cxy, (1, 1)) class TestPyReplAutoindent(TestCase): def prepare_reader(self, events): console = FakeConsole(events) config = ReadlineConfig(readline_completer=None) reader = ReadlineAlikeReader(console=console, config=config) return reader def test_auto_indent_default(self): # fmt: off input_code = ( "def f():\n" "pass\n\n" ) output_code = ( "def f():\n" " pass\n" " " ) # fmt: on def test_auto_indent_continuation(self): # auto indenting according to previous user indentation # fmt: off events = itertools.chain( code_to_events("def f():\n"), # add backspace to delete default auto-indent [ Event(evt="key", data="backspace", raw=bytearray(b"\x7f")), ], code_to_events( " pass\n" "pass\n\n" ), ) output_code = ( "def f():\n" " pass\n" " pass\n" " " ) # fmt: on reader = self.prepare_reader(events) output = multiline_input(reader) self.assertEqual(output, output_code) def test_auto_indent_prev_block(self): # auto indenting according to indentation in different block # fmt: off events = itertools.chain( code_to_events("def f():\n"), # add backspace to delete default auto-indent [ Event(evt="key", data="backspace", raw=bytearray(b"\x7f")), ], code_to_events( " pass\n" "pass\n\n" ), code_to_events( "def g():\n" "pass\n\n" ), ) output_code = ( "def g():\n" " pass\n" " " ) # fmt: on reader = self.prepare_reader(events) output1 = multiline_input(reader) output2 = multiline_input(reader) self.assertEqual(output2, output_code) def test_auto_indent_multiline(self): # fmt: off events = itertools.chain( code_to_events( "def f():\n" "pass" ), [ # go to the end of the first line Event(evt="key", data="up", raw=bytearray(b"\x1bOA")), Event(evt="key", data="\x05", raw=bytearray(b"\x1bO5")), # new line should be autoindented Event(evt="key", data="\n", raw=bytearray(b"\n")), ], code_to_events( "pass" ), [ # go to end of last line Event(evt="key", data="down", raw=bytearray(b"\x1bOB")), Event(evt="key", data="\x05", raw=bytearray(b"\x1bO5")), # double newline to terminate the block Event(evt="key", data="\n", raw=bytearray(b"\n")), Event(evt="key", data="\n", raw=bytearray(b"\n")), ], ) output_code = ( "def f():\n" " pass\n" " pass\n" " " ) # fmt: on reader = self.prepare_reader(events) output = multiline_input(reader) self.assertEqual(output, output_code) def test_auto_indent_with_comment(self): # fmt: off events = code_to_events( "def f(): # foo\n" "pass\n\n" ) output_code = ( "def f(): # foo\n" " pass\n" " " ) # fmt: on reader = self.prepare_reader(events) output = multiline_input(reader) self.assertEqual(output, output_code) def test_auto_indent_ignore_comments(self): # fmt: off events = code_to_events( "pass #:\n" ) output_code = ( "pass #:" ) # fmt: on reader = self.prepare_reader(events) output = multiline_input(reader) self.assertEqual(output, output_code) class TestPyReplOutput(TestCase): def prepare_reader(self, events): console = FakeConsole(events) config = ReadlineConfig(readline_completer=None) reader = ReadlineAlikeReader(console=console, config=config) reader.can_colorize = False return reader def test_basic(self): reader = self.prepare_reader(code_to_events("1+1\n")) output = multiline_input(reader) self.assertEqual(output, "1+1") self.assertEqual(clean_screen(reader.screen), "1+1") def test_multiline_edit(self): events = itertools.chain( code_to_events("def f():\n...\n\n"), [ Event(evt="key", data="up", raw=bytearray(b"\x1bOA")), Event(evt="key", data="up", raw=bytearray(b"\x1bOA")), Event(evt="key", data="left", raw=bytearray(b"\x1bOD")), Event(evt="key", data="left", raw=bytearray(b"\x1bOD")), Event(evt="key", data="left", raw=bytearray(b"\x1bOD")), Event(evt="key", data="backspace", raw=bytearray(b"\x08")), Event(evt="key", data="g", raw=bytearray(b"g")), Event(evt="key", data="down", raw=bytearray(b"\x1bOB")), Event(evt="key", data="backspace", raw=bytearray(b"\x08")), Event(evt="key", data="delete", raw=bytearray(b"\x7F")), Event(evt="key", data="right", raw=bytearray(b"g")), Event(evt="key", data="backspace", raw=bytearray(b"\x08")), Event(evt="key", data="p", raw=bytearray(b"p")), Event(evt="key", data="a", raw=bytearray(b"a")), Event(evt="key", data="s", raw=bytearray(b"s")), Event(evt="key", data="s", raw=bytearray(b"s")), Event(evt="key", data="\n", raw=bytearray(b"\n")), Event(evt="key", data="\n", raw=bytearray(b"\n")), ], ) reader = self.prepare_reader(events) output = multiline_input(reader) self.assertEqual(output, "def f():\n ...\n ") self.assertEqual(clean_screen(reader.screen), "def f():\n ...") output = multiline_input(reader) self.assertEqual(output, "def g():\n pass\n ") self.assertEqual(clean_screen(reader.screen), "def g():\n pass") def test_history_navigation_with_up_arrow(self): events = itertools.chain( code_to_events("1+1\n2+2\n"), [ Event(evt="key", data="up", raw=bytearray(b"\x1bOA")), Event(evt="key", data="\n", raw=bytearray(b"\n")), Event(evt="key", data="up", raw=bytearray(b"\x1bOA")), Event(evt="key", data="up", raw=bytearray(b"\x1bOA")), Event(evt="key", data="up", raw=bytearray(b"\x1bOA")), Event(evt="key", data="\n", raw=bytearray(b"\n")), ], ) reader = self.prepare_reader(events) output = multiline_input(reader) self.assertEqual(output, "1+1") self.assertEqual(clean_screen(reader.screen), "1+1") output = multiline_input(reader) self.assertEqual(output, "2+2") self.assertEqual(clean_screen(reader.screen), "2+2") output = multiline_input(reader) self.assertEqual(output, "2+2") self.assertEqual(clean_screen(reader.screen), "2+2") output = multiline_input(reader) self.assertEqual(output, "1+1") self.assertEqual(clean_screen(reader.screen), "1+1") def test_history_with_multiline_entries(self): code = "def foo():\nx = 1\ny = 2\nz = 3\n\ndef bar():\nreturn 42\n\n" events = list(itertools.chain( code_to_events(code), [ Event(evt="key", data="up", raw=bytearray(b"\x1bOA")), Event(evt="key", data="up", raw=bytearray(b"\x1bOA")), Event(evt="key", data="up", raw=bytearray(b"\x1bOA")), Event(evt="key", data="\n", raw=bytearray(b"\n")), Event(evt="key", data="\n", raw=bytearray(b"\n")), ] )) reader = self.prepare_reader(events) output = multiline_input(reader) output = multiline_input(reader) output = multiline_input(reader) self.assertEqual( clean_screen(reader.screen), 'def foo():\n x = 1\n y = 2\n z = 3' ) self.assertEqual(output, "def foo():\n x = 1\n y = 2\n z = 3\n ") def test_history_navigation_with_down_arrow(self): events = itertools.chain( code_to_events("1+1\n2+2\n"), [ Event(evt="key", data="up", raw=bytearray(b"\x1bOA")), Event(evt="key", data="up", raw=bytearray(b"\x1bOA")), Event(evt="key", data="\n", raw=bytearray(b"\n")), Event(evt="key", data="down", raw=bytearray(b"\x1bOB")), Event(evt="key", data="down", raw=bytearray(b"\x1bOB")), ], ) reader = self.prepare_reader(events) output = multiline_input(reader) self.assertEqual(output, "1+1") self.assertEqual(clean_screen(reader.screen), "1+1") def test_history_search(self): events = itertools.chain( code_to_events("1+1\n2+2\n3+3\n"), [ Event(evt="key", data="\x12", raw=bytearray(b"\x12")), Event(evt="key", data="1", raw=bytearray(b"1")), Event(evt="key", data="\n", raw=bytearray(b"\n")), Event(evt="key", data="\n", raw=bytearray(b"\n")), ], ) reader = self.prepare_reader(events) output = multiline_input(reader) self.assertEqual(output, "1+1") self.assertEqual(clean_screen(reader.screen), "1+1") output = multiline_input(reader) self.assertEqual(output, "2+2") self.assertEqual(clean_screen(reader.screen), "2+2") output = multiline_input(reader) self.assertEqual(output, "3+3") self.assertEqual(clean_screen(reader.screen), "3+3") output = multiline_input(reader) self.assertEqual(output, "1+1") self.assertEqual(clean_screen(reader.screen), "1+1") def test_control_character(self): events = code_to_events("c\x1d\n") reader = self.prepare_reader(events) output = multiline_input(reader) self.assertEqual(output, "c\x1d") self.assertEqual(clean_screen(reader.screen), "c") class TestPyReplCompleter(TestCase): def prepare_reader(self, events, namespace): console = FakeConsole(events) config = ReadlineConfig() config.readline_completer = rlcompleter.Completer(namespace).complete reader = ReadlineAlikeReader(console=console, config=config) return reader @patch("rlcompleter._readline_available", False) def test_simple_completion(self): events = code_to_events("os.getpid\t\n") namespace = {"os": os} reader = self.prepare_reader(events, namespace) output = multiline_input(reader, namespace) self.assertEqual(output, "os.getpid()") def test_completion_with_many_options(self): # Test with something that initially displays many options # and then complete from one of them. The first time tab is # pressed, the options are displayed (which corresponds to # when the repl shows [ not unique ]) and the second completes # from one of them. events = code_to_events("os.\t\tO_AP\t\n") namespace = {"os": os} reader = self.prepare_reader(events, namespace) output = multiline_input(reader, namespace) self.assertEqual(output, "os.O_APPEND") def test_empty_namespace_completion(self): events = code_to_events("os.geten\t\n") namespace = {} reader = self.prepare_reader(events, namespace) output = multiline_input(reader, namespace) self.assertEqual(output, "os.geten") def test_global_namespace_completion(self): events = code_to_events("py\t\n") namespace = {"python": None} reader = self.prepare_reader(events, namespace) output = multiline_input(reader, namespace) self.assertEqual(output, "python") def test_updown_arrow_with_completion_menu(self): """Up arrow in the middle of unfinished tab completion when the menu is displayed should work and trigger going back in history. Down arrow should subsequently get us back to the incomplete command.""" code = "import os\nos.\t\t" namespace = {"os": os} events = itertools.chain( code_to_events(code), [ Event(evt="key", data="up", raw=bytearray(b"\x1bOA")), Event(evt="key", data="down", raw=bytearray(b"\x1bOB")), ], code_to_events("\n"), ) reader = self.prepare_reader(events, namespace=namespace) output = multiline_input(reader, namespace) # This is the first line, nothing to see here self.assertEqual(output, "import os") # This is the second line. We pressed up and down arrows # so we should end up where we were when we initiated tab completion. output = multiline_input(reader, namespace) self.assertEqual(output, "os.") @patch("_pyrepl.readline._ReadlineWrapper.get_reader") @patch("sys.stderr", new_callable=io.StringIO) def test_completion_with_warnings(self, mock_stderr, mock_get_reader): class Dummy: @property def test_func(self): import warnings warnings.warn("warnings\n") return None dummy = Dummy() events = code_to_events("dummy.test_func.\t\n\n") namespace = {"dummy": dummy} reader = self.prepare_reader(events, namespace) mock_get_reader.return_value = reader output = readline_multiline_input(more_lines, ">>>", "...") self.assertEqual(output, "dummy.test_func.__") self.assertEqual(mock_stderr.getvalue(), "") class TestPasteEvent(TestCase): def prepare_reader(self, events): console = FakeConsole(events) config = ReadlineConfig(readline_completer=None) reader = ReadlineAlikeReader(console=console, config=config) return reader def test_paste(self): # fmt: off code = ( "def a():\n" " for x in range(10):\n" " if x%2:\n" " print(x)\n" " else:\n" " pass\n" ) # fmt: on events = itertools.chain( [ Event(evt="key", data="f3", raw=bytearray(b"\x1bOR")), ], code_to_events(code), [ Event(evt="key", data="f3", raw=bytearray(b"\x1bOR")), ], code_to_events("\n"), ) reader = self.prepare_reader(events) output = multiline_input(reader) self.assertEqual(output, code) def test_paste_mid_newlines(self): # fmt: off code = ( "def f():\n" " x = y\n" " \n" " y = z\n" ) # fmt: on events = itertools.chain( [ Event(evt="key", data="f3", raw=bytearray(b"\x1bOR")), ], code_to_events(code), [ Event(evt="key", data="f3", raw=bytearray(b"\x1bOR")), ], code_to_events("\n"), ) reader = self.prepare_reader(events) output = multiline_input(reader) self.assertEqual(output, code) def test_paste_mid_newlines_not_in_paste_mode(self): # fmt: off code = ( "def f():\n" "x = y\n" "\n" "y = z\n\n" ) expected = ( "def f():\n" " x = y\n" " " ) # fmt: on events = code_to_events(code) reader = self.prepare_reader(events) output = multiline_input(reader) self.assertEqual(output, expected) def test_paste_not_in_paste_mode(self): # fmt: off input_code = ( "def a():\n" "for x in range(10):\n" "if x%2:\n" "print(x)\n" "else:\n" "pass\n\n" ) output_code = ( "def a():\n" " for x in range(10):\n" " if x%2:\n" " print(x)\n" " else:" ) # fmt: on events = code_to_events(input_code) reader = self.prepare_reader(events) output = multiline_input(reader) self.assertEqual(output, output_code) def test_bracketed_paste(self): """Test that bracketed paste using \x1b[200~ and \x1b[201~ works.""" # fmt: off input_code = ( "def a():\n" " for x in range(10):\n" "\n" " if x%2:\n" " print(x)\n" "\n" " else:\n" " pass\n" ) output_code = ( "def a():\n" " for x in range(10):\n" "\n" " if x%2:\n" " print(x)\n" "\n" " else:\n" " pass\n" ) # fmt: on paste_start = "\x1b[200~" paste_end = "\x1b[201~" events = itertools.chain( code_to_events(paste_start), code_to_events(input_code), code_to_events(paste_end), code_to_events("\n"), ) reader = self.prepare_reader(events) output = multiline_input(reader) self.assertEqual(output, output_code) def test_bracketed_paste_single_line(self): input_code = "oneline" paste_start = "\x1b[200~" paste_end = "\x1b[201~" events = itertools.chain( code_to_events(paste_start), code_to_events(input_code), code_to_events(paste_end), code_to_events("\n"), ) reader = self.prepare_reader(events) output = multiline_input(reader) self.assertEqual(output, input_code) @skipUnless(pty, "requires pty") class TestMain(TestCase): @force_not_colorized def test_exposed_globals_in_repl(self): pre = "['__annotations__', '__builtins__'" post = "'__loader__', '__name__', '__package__', '__spec__']" output, exit_code = self.run_repl(["sorted(dir())", "exit"]) if "can't use pyrepl" in output: self.skipTest("pyrepl not available") self.assertEqual(exit_code, 0) # if `__main__` is not a file (impossible with pyrepl) case1 = f"{pre}, '__doc__', {post}" in output # if `__main__` is an uncached .py file (no .pyc) case2 = f"{pre}, '__doc__', '__file__', {post}" in output # if `__main__` is a cached .pyc file and the .py source exists case3 = f"{pre}, '__cached__', '__doc__', '__file__', {post}" in output # if `__main__` is a cached .pyc file but there's no .py source file case4 = f"{pre}, '__cached__', '__doc__', {post}" in output self.assertTrue(case1 or case2 or case3 or case4, output) def test_dumb_terminal_exits_cleanly(self): env = os.environ.copy() 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.assertNotIn("Exception", output) self.assertNotIn("Traceback", output) @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") env.pop("PYTHON_BASIC_REPL", None) output, exit_code = self.run_repl(commands, env=env) if "can\'t use pyrepl" in output: self.skipTest("pyrepl not available") self.assertEqual(exit_code, 0) self.assertIn("True", output) self.assertNotIn("False", output) self.assertNotIn("Exception", output) self.assertNotIn("Traceback", output) env["PYTHON_BASIC_REPL"] = "1" output, exit_code = self.run_repl(commands, env=env) self.assertEqual(exit_code, 0) self.assertIn("False", output) self.assertNotIn("True", output) self.assertNotIn("Exception", output) self.assertNotIn("Traceback", output) def test_not_wiping_history_file(self): # skip, if readline module is not available import_module('readline') hfile = tempfile.NamedTemporaryFile(delete=False) self.addCleanup(unlink, hfile.name) env = os.environ.copy() env["PYTHON_HISTORY"] = hfile.name commands = "123\nspam\nexit()\n" env.pop("PYTHON_BASIC_REPL", None) output, exit_code = self.run_repl(commands, env=env) self.assertEqual(exit_code, 0) self.assertIn("123", output) self.assertIn("spam", output) self.assertNotEqual(pathlib.Path(hfile.name).stat().st_size, 0) hfile.file.truncate() hfile.close() env["PYTHON_BASIC_REPL"] = "1" output, exit_code = self.run_repl(commands, env=env) self.assertEqual(exit_code, 0) self.assertIn("123", output) self.assertIn("spam", output) self.assertNotEqual(pathlib.Path(hfile.name).stat().st_size, 0) def run_repl(self, repl_input: str | list[str], env: dict | None = None) -> tuple[str, int]: master_fd, slave_fd = pty.openpty() cmd = [sys.executable, "-i", "-u"] if env is None: cmd.append("-I") process = subprocess.Popen( cmd, stdin=slave_fd, stdout=slave_fd, stderr=slave_fd, text=True, close_fds=True, env=env if env else os.environ, ) os.close(slave_fd) if isinstance(repl_input, list): repl_input = "\n".join(repl_input) + "\n" os.write(master_fd, repl_input.encode("utf-8")) output = [] while select.select([master_fd], [], [], SHORT_TIMEOUT)[0]: try: data = os.read(master_fd, 1024).decode("utf-8") if not data: break except OSError: break output.append(data) os.close(master_fd) try: exit_code = process.wait(timeout=SHORT_TIMEOUT) except subprocess.TimeoutExpired: process.kill() exit_code = process.wait() return "\n".join(output), exit_code