mirror of https://github.com/python/cpython
375 lines
15 KiB
Python
375 lines
15 KiB
Python
"""
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Very minimal unittests for parts of the readline module.
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"""
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import locale
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import os
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import sys
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import tempfile
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import textwrap
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import unittest
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from test.support import verbose
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from test.support.import_helper import import_module
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from test.support.os_helper import unlink, temp_dir, TESTFN
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from test.support.pty_helper import run_pty
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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.backend == "editline"
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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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try:
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readline.append_history_file(1, hfilename)
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except FileNotFoundError:
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pass # Some implementations return this error (libreadline).
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else:
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os.unlink(hfilename) # Some create it anyways (libedit).
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# If the file wasn't created, unlink will fail.
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# We're just testing that one of the two expected behaviors happens
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# instead of an incorrect error.
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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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def test_write_read_limited_history(self):
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previous_length = readline.get_history_length()
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self.addCleanup(readline.set_history_length, previous_length)
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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.add_history("third line")
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readline.set_history_length(2)
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self.assertEqual(readline.get_history_length(), 2)
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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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self.assertEqual(readline.get_current_history_length(), 0)
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self.assertEqual(readline.get_history_length(), 2)
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readline.read_history_file(TESTFN)
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self.assertEqual(readline.get_history_item(1), "second line")
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self.assertEqual(readline.get_history_item(2), "third line")
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self.assertEqual(readline.get_history_item(3), None)
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# Readline seems to report an additional history element.
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self.assertIn(readline.get_current_history_length(), (2, 3))
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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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def test_backend(self):
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self.assertIn(readline.backend, ("readline", "editline"))
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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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# bpo-44949: Sometimes, the newline character is not written at the
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# end, so don't expect it in the output.
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self.assertIn(b"History length: 1", 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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# bpo-44949: Sometimes, the newline character is not written at the
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# end, so don't expect it in the output.
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self.assertIn(b"History length: 0", output)
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def test_set_complete_delims(self):
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script = textwrap.dedent("""
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import readline
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def complete(text, state):
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if state == 0 and text == "$":
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return "$complete"
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return None
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if readline.backend == "editline":
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readline.parse_and_bind(r'bind "\\t" rl_complete')
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else:
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readline.parse_and_bind(r'"\\t": complete')
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readline.set_completer_delims(" \\t\\n")
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readline.set_completer(complete)
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print(input())
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""")
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output = run_pty(script, input=b"$\t\n")
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self.assertIn(b"$complete", output)
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def test_nonascii(self):
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loc = locale.setlocale(locale.LC_CTYPE, None)
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if loc in ('C', 'POSIX'):
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# bpo-29240: On FreeBSD, if the LC_CTYPE locale is C or POSIX,
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# writing and reading non-ASCII bytes into/from a TTY works, but
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# readline or ncurses ignores non-ASCII bytes on read.
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self.skipTest(f"the LC_CTYPE locale is {loc!r}")
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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.backend == "editline"
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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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if sys.platform == "darwin" or not is_editline:
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self.assertIn(b"indexes 11 13\r\n", output)
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# Non-macOS libedit does not handle non-ASCII bytes
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# the same way and generates character indices
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# rather than byte indices via get_begidx() and
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# get_endidx(). Ex: libedit2 3.1-20191231-2 on Debian
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# winds up with "indexes 10 12". Stemming from the
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# start and end values calls back into readline.c's
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# rl_attempted_completion_function = flex_complete with:
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# (11, 13) instead of libreadline's (12, 15).
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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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# bpo-45195: Sometimes, the newline character is not written at the
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# end, so don't expect it in the output.
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self.assertIn(b"history " + expected, 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 test_write_read_limited_history(self):
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previous_length = readline.get_history_length()
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self.addCleanup(readline.set_history_length, previous_length)
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readline.add_history("first line")
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readline.add_history("second line")
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readline.add_history("third line")
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readline.set_history_length(2)
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self.assertEqual(readline.get_history_length(), 2)
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readline.write_history_file(TESTFN)
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self.addCleanup(os.remove, TESTFN)
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readline.read_history_file(TESTFN)
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# Without clear_history() there's no good way to test if
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# the correct entries are present (we're combining history limiting and
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# possible deduplication with arbitrary previous content).
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# So, we've only tested that the read did not fail.
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# See TestHistoryManipulation for the full test.
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if __name__ == "__main__":
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unittest.main()
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