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"""
Very minimal unittests for parts of the readline module.
"""
import os
import unittest
from test.support import run_unittest, import_module
from test.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.skipIf(not 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)
class TestReadline(unittest.TestCase):
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'')
def test_main():
run_unittest(TestHistoryManipulation, TestReadline)
if __name__ == "__main__":
test_main()
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