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aa6a4d6ed8
Turns out that history-size was added in readline 6.0. This explain why this tests fail on FreeBSD when using readline 5.2. We skip now the history size if readline does not support it. See https://cnswww.cns.cwru.edu/php/chet/readline/CHANGES for details.
325 lines
13 KiB
Python
325 lines
13 KiB
Python
"""
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Very minimal unittests for parts of the readline module.
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"""
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from contextlib import ExitStack
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from errno import EIO
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import os
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import selectors
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import subprocess
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import sys
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import tempfile
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import unittest
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from test.support import import_module, unlink, temp_dir, TESTFN, verbose
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from test.support.script_helper import assert_python_ok
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# Skip tests if there is no readline module
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readline = import_module('readline')
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if hasattr(readline, "_READLINE_LIBRARY_VERSION"):
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is_editline = ("EditLine wrapper" in readline._READLINE_LIBRARY_VERSION)
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else:
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is_editline = (readline.__doc__ and "libedit" in readline.__doc__)
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def setUpModule():
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if verbose:
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# Python implementations other than CPython may not have
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# these private attributes
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if hasattr(readline, "_READLINE_VERSION"):
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print(f"readline version: {readline._READLINE_VERSION:#x}")
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print(f"readline runtime version: {readline._READLINE_RUNTIME_VERSION:#x}")
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if hasattr(readline, "_READLINE_LIBRARY_VERSION"):
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print(f"readline library version: {readline._READLINE_LIBRARY_VERSION!r}")
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print(f"use libedit emulation? {is_editline}")
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@unittest.skipUnless(hasattr(readline, "clear_history"),
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"The history update test cannot be run because the "
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"clear_history method is not available.")
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class TestHistoryManipulation (unittest.TestCase):
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"""
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These tests were added to check that the libedit emulation on OSX and the
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"real" readline have the same interface for history manipulation. That's
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why the tests cover only a small subset of the interface.
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"""
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def testHistoryUpdates(self):
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readline.clear_history()
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readline.add_history("first line")
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readline.add_history("second line")
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self.assertEqual(readline.get_history_item(0), None)
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self.assertEqual(readline.get_history_item(1), "first line")
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self.assertEqual(readline.get_history_item(2), "second line")
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readline.replace_history_item(0, "replaced line")
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self.assertEqual(readline.get_history_item(0), None)
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self.assertEqual(readline.get_history_item(1), "replaced line")
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self.assertEqual(readline.get_history_item(2), "second line")
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self.assertEqual(readline.get_current_history_length(), 2)
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readline.remove_history_item(0)
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self.assertEqual(readline.get_history_item(0), None)
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self.assertEqual(readline.get_history_item(1), "second line")
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self.assertEqual(readline.get_current_history_length(), 1)
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@unittest.skipUnless(hasattr(readline, "append_history_file"),
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"append_history not available")
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def test_write_read_append(self):
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hfile = tempfile.NamedTemporaryFile(delete=False)
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hfile.close()
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hfilename = hfile.name
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self.addCleanup(unlink, hfilename)
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# test write-clear-read == nop
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readline.clear_history()
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readline.add_history("first line")
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readline.add_history("second line")
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readline.write_history_file(hfilename)
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readline.clear_history()
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self.assertEqual(readline.get_current_history_length(), 0)
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readline.read_history_file(hfilename)
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self.assertEqual(readline.get_current_history_length(), 2)
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self.assertEqual(readline.get_history_item(1), "first line")
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self.assertEqual(readline.get_history_item(2), "second line")
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# test append
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readline.append_history_file(1, hfilename)
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readline.clear_history()
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readline.read_history_file(hfilename)
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self.assertEqual(readline.get_current_history_length(), 3)
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self.assertEqual(readline.get_history_item(1), "first line")
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self.assertEqual(readline.get_history_item(2), "second line")
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self.assertEqual(readline.get_history_item(3), "second line")
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# test 'no such file' behaviour
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os.unlink(hfilename)
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with self.assertRaises(FileNotFoundError):
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readline.append_history_file(1, hfilename)
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# write_history_file can create the target
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readline.write_history_file(hfilename)
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def test_nonascii_history(self):
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readline.clear_history()
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try:
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readline.add_history("entrée 1")
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except UnicodeEncodeError as err:
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self.skipTest("Locale cannot encode test data: " + format(err))
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readline.add_history("entrée 2")
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readline.replace_history_item(1, "entrée 22")
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readline.write_history_file(TESTFN)
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self.addCleanup(os.remove, TESTFN)
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readline.clear_history()
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readline.read_history_file(TESTFN)
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if is_editline:
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# An add_history() call seems to be required for get_history_
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# item() to register items from the file
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readline.add_history("dummy")
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self.assertEqual(readline.get_history_item(1), "entrée 1")
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self.assertEqual(readline.get_history_item(2), "entrée 22")
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class TestReadline(unittest.TestCase):
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@unittest.skipIf(readline._READLINE_VERSION < 0x0601 and not is_editline,
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"not supported in this library version")
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def test_init(self):
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# Issue #19884: Ensure that the ANSI sequence "\033[1034h" is not
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# written into stdout when the readline module is imported and stdout
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# is redirected to a pipe.
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rc, stdout, stderr = assert_python_ok('-c', 'import readline',
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TERM='xterm-256color')
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self.assertEqual(stdout, b'')
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auto_history_script = """\
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import readline
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readline.set_auto_history({})
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input()
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print("History length:", readline.get_current_history_length())
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"""
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def test_auto_history_enabled(self):
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output = run_pty(self.auto_history_script.format(True))
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self.assertIn(b"History length: 1\r\n", output)
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def test_auto_history_disabled(self):
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output = run_pty(self.auto_history_script.format(False))
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self.assertIn(b"History length: 0\r\n", output)
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def test_nonascii(self):
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try:
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readline.add_history("\xEB\xEF")
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except UnicodeEncodeError as err:
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self.skipTest("Locale cannot encode test data: " + format(err))
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script = r"""import readline
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is_editline = readline.__doc__ and "libedit" in readline.__doc__
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inserted = "[\xEFnserted]"
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macro = "|t\xEB[after]"
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set_pre_input_hook = getattr(readline, "set_pre_input_hook", None)
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if is_editline or not set_pre_input_hook:
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# The insert_line() call via pre_input_hook() does nothing with Editline,
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# so include the extra text that would have been inserted here
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macro = inserted + macro
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if is_editline:
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readline.parse_and_bind(r'bind ^B ed-prev-char')
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readline.parse_and_bind(r'bind "\t" rl_complete')
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readline.parse_and_bind(r'bind -s ^A "{}"'.format(macro))
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else:
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readline.parse_and_bind(r'Control-b: backward-char')
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readline.parse_and_bind(r'"\t": complete')
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readline.parse_and_bind(r'set disable-completion off')
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readline.parse_and_bind(r'set show-all-if-ambiguous off')
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readline.parse_and_bind(r'set show-all-if-unmodified off')
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readline.parse_and_bind(r'Control-a: "{}"'.format(macro))
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def pre_input_hook():
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readline.insert_text(inserted)
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readline.redisplay()
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if set_pre_input_hook:
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set_pre_input_hook(pre_input_hook)
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def completer(text, state):
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if text == "t\xEB":
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if state == 0:
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print("text", ascii(text))
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print("line", ascii(readline.get_line_buffer()))
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print("indexes", readline.get_begidx(), readline.get_endidx())
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return "t\xEBnt"
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if state == 1:
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return "t\xEBxt"
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if text == "t\xEBx" and state == 0:
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return "t\xEBxt"
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return None
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readline.set_completer(completer)
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def display(substitution, matches, longest_match_length):
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print("substitution", ascii(substitution))
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print("matches", ascii(matches))
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readline.set_completion_display_matches_hook(display)
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print("result", ascii(input()))
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print("history", ascii(readline.get_history_item(1)))
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"""
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input = b"\x01" # Ctrl-A, expands to "|t\xEB[after]"
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input += b"\x02" * len("[after]") # Move cursor back
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input += b"\t\t" # Display possible completions
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input += b"x\t" # Complete "t\xEBx" -> "t\xEBxt"
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input += b"\r"
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output = run_pty(script, input)
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self.assertIn(b"text 't\\xeb'\r\n", output)
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self.assertIn(b"line '[\\xefnserted]|t\\xeb[after]'\r\n", output)
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self.assertIn(b"indexes 11 13\r\n", output)
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if not is_editline and hasattr(readline, "set_pre_input_hook"):
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self.assertIn(b"substitution 't\\xeb'\r\n", output)
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self.assertIn(b"matches ['t\\xebnt', 't\\xebxt']\r\n", output)
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expected = br"'[\xefnserted]|t\xebxt[after]'"
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self.assertIn(b"result " + expected + b"\r\n", output)
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self.assertIn(b"history " + expected + b"\r\n", output)
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# We have 2 reasons to skip this test:
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# - readline: history size was added in 6.0
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# See https://cnswww.cns.cwru.edu/php/chet/readline/CHANGES
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# - editline: history size is broken on OS X 10.11.6.
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# Newer versions were not tested yet.
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@unittest.skipIf(readline._READLINE_VERSION < 0x600,
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"this readline version does not support history-size")
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@unittest.skipIf(is_editline,
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"editline history size configuration is broken")
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def test_history_size(self):
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history_size = 10
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with temp_dir() as test_dir:
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inputrc = os.path.join(test_dir, "inputrc")
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with open(inputrc, "wb") as f:
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f.write(b"set history-size %d\n" % history_size)
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history_file = os.path.join(test_dir, "history")
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with open(history_file, "wb") as f:
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# history_size * 2 items crashes readline
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data = b"".join(b"item %d\n" % i
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for i in range(history_size * 2))
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f.write(data)
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script = """
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import os
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import readline
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history_file = os.environ["HISTORY_FILE"]
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readline.read_history_file(history_file)
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input()
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readline.write_history_file(history_file)
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"""
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env = dict(os.environ)
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env["INPUTRC"] = inputrc
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env["HISTORY_FILE"] = history_file
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run_pty(script, input=b"last input\r", env=env)
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with open(history_file, "rb") as f:
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lines = f.readlines()
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self.assertEqual(len(lines), history_size)
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self.assertEqual(lines[-1].strip(), b"last input")
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def run_pty(script, input=b"dummy input\r", env=None):
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pty = import_module('pty')
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output = bytearray()
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[master, slave] = pty.openpty()
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args = (sys.executable, '-c', script)
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proc = subprocess.Popen(args, stdin=slave, stdout=slave, stderr=slave, env=env)
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os.close(slave)
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with ExitStack() as cleanup:
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cleanup.enter_context(proc)
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def terminate(proc):
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try:
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proc.terminate()
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except ProcessLookupError:
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# Workaround for Open/Net BSD bug (Issue 16762)
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pass
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cleanup.callback(terminate, proc)
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cleanup.callback(os.close, master)
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# Avoid using DefaultSelector and PollSelector. Kqueue() does not
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# work with pseudo-terminals on OS X < 10.9 (Issue 20365) and Open
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# BSD (Issue 20667). Poll() does not work with OS X 10.6 or 10.4
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# either (Issue 20472). Hopefully the file descriptor is low enough
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# to use with select().
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sel = cleanup.enter_context(selectors.SelectSelector())
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sel.register(master, selectors.EVENT_READ | selectors.EVENT_WRITE)
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os.set_blocking(master, False)
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while True:
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for [_, events] in sel.select():
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if events & selectors.EVENT_READ:
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try:
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chunk = os.read(master, 0x10000)
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except OSError as err:
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# Linux raises EIO when slave is closed (Issue 5380)
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if err.errno != EIO:
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raise
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chunk = b""
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if not chunk:
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return output
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output.extend(chunk)
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if events & selectors.EVENT_WRITE:
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try:
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input = input[os.write(master, input):]
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except OSError as err:
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# Apparently EIO means the slave was closed
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if err.errno != EIO:
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raise
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input = b"" # Stop writing
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if not input:
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sel.modify(master, selectors.EVENT_READ)
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if __name__ == "__main__":
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unittest.main()
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