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"""
Very minimal unittests for parts of the readline module.
"""
import os
import tempfile
import unittest
from test.support import import_module, unlink
from test.support.script_helper import assert_python_ok
# Skip tests if there is no readline module
readline = import_module('readline')
class TestHistoryManipulation (unittest.TestCase):
"""
These tests were added to check that the libedit emulation on OSX and the
"real" readline have the same interface for history manipulation. That's
why the tests cover only a small subset of the interface.
"""
@unittest.skipUnless(hasattr(readline, "clear_history"),
"The history update test cannot be run because the "
"clear_history method is not available.")
def testHistoryUpdates(self):
readline.clear_history()
readline.add_history("first line")
readline.add_history("second line")
self.assertEqual(readline.get_history_item(0), None)
self.assertEqual(readline.get_history_item(1), "first line")
self.assertEqual(readline.get_history_item(2), "second line")
readline.replace_history_item(0, "replaced line")
self.assertEqual(readline.get_history_item(0), None)
self.assertEqual(readline.get_history_item(1), "replaced line")
self.assertEqual(readline.get_history_item(2), "second line")
self.assertEqual(readline.get_current_history_length(), 2)
readline.remove_history_item(0)
self.assertEqual(readline.get_history_item(0), None)
self.assertEqual(readline.get_history_item(1), "second line")
self.assertEqual(readline.get_current_history_length(), 1)
@unittest.skipUnless(hasattr(readline, "append_history_file"),
"append_history not available")
def test_write_read_append(self):
hfile = tempfile.NamedTemporaryFile(delete=False)
hfile.close()
hfilename = hfile.name
self.addCleanup(unlink, hfilename)
# test write-clear-read == nop
readline.clear_history()
readline.add_history("first line")
readline.add_history("second line")
readline.write_history_file(hfilename)
readline.clear_history()
self.assertEqual(readline.get_current_history_length(), 0)
readline.read_history_file(hfilename)
self.assertEqual(readline.get_current_history_length(), 2)
self.assertEqual(readline.get_history_item(1), "first line")
self.assertEqual(readline.get_history_item(2), "second line")
# test append
readline.append_history_file(1, hfilename)
readline.clear_history()
readline.read_history_file(hfilename)
self.assertEqual(readline.get_current_history_length(), 3)
self.assertEqual(readline.get_history_item(1), "first line")
self.assertEqual(readline.get_history_item(2), "second line")
self.assertEqual(readline.get_history_item(3), "second line")
# test 'no such file' behaviour
os.unlink(hfilename)
with self.assertRaises(FileNotFoundError):
readline.append_history_file(1, hfilename)
# write_history_file can create the target
readline.write_history_file(hfilename)
class TestReadline(unittest.TestCase):
@unittest.skipIf(readline._READLINE_VERSION < 0x0600
and "libedit" not in readline.__doc__,
"not supported in this library version")
def test_init(self):
# Issue #19884: Ensure that the ANSI sequence "\033[1034h" is not
# written into stdout when the readline module is imported and stdout
# is redirected to a pipe.
rc, stdout, stderr = assert_python_ok('-c', 'import readline',
TERM='xterm-256color')
self.assertEqual(stdout, b'')
if __name__ == "__main__":
unittest.main()
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