Lib/test/test_curses.py

#
# Test script for the curses module
#
# This script doesn't actually display anything very coherent. but it
# does call every method and function.
#
# Functions not tested: {def,reset}_{shell,prog}_mode, getch(), getstr(),
# init_color()
# Only called, not tested: getmouse(), ungetmouse()
#

import sys, tempfile, os

# Optionally test curses module.  This currently requires that the
# 'curses' resource be given on the regrtest command line using the -u
# option.  If not available, nothing after this line will be executed.

import unittest
from test.support import requires, import_module
import inspect
requires('curses')

# If either of these don't exist, skip the tests.
curses = import_module('curses')
curses.panel = import_module('curses.panel')


# XXX: if newterm was supported we could use it instead of initscr and not exit
term = os.environ.get('TERM')
if not term or term == 'unknown':
    raise unittest.SkipTest("$TERM=%r, calling initscr() may cause exit" % term)

if sys.platform == "cygwin":
    raise unittest.SkipTest("cygwin's curses mostly just hangs")

def window_funcs(stdscr):
    "Test the methods of windows"
    win = curses.newwin(10,10)
    win = curses.newwin(5,5, 5,5)
    win2 = curses.newwin(15,15, 5,5)

    for meth in [stdscr.addch, stdscr.addstr]:
        for args in [('a'), ('a', curses.A_BOLD),
                     (4,4, 'a'), (5,5, 'a', curses.A_BOLD)]:
            meth(*args)

    for meth in [stdscr.box, stdscr.clear, stdscr.clrtobot,
                 stdscr.clrtoeol, stdscr.cursyncup, stdscr.delch,
                 stdscr.deleteln, stdscr.erase, stdscr.getbegyx,
                 stdscr.getbkgd, stdscr.getkey, stdscr.getmaxyx,
                 stdscr.getparyx, stdscr.getyx, stdscr.inch,
                 stdscr.insertln, stdscr.instr, stdscr.is_wintouched,
                 win.noutrefresh, stdscr.redrawwin, stdscr.refresh,
                 stdscr.standout, stdscr.standend, stdscr.syncdown,
                 stdscr.syncup, stdscr.touchwin, stdscr.untouchwin]:
        meth()

    stdscr.addnstr('1234', 3)
    stdscr.addnstr('1234', 3, curses.A_BOLD)
    stdscr.addnstr(4,4, '1234', 3)
    stdscr.addnstr(5,5, '1234', 3, curses.A_BOLD)

    stdscr.attron(curses.A_BOLD)
    stdscr.attroff(curses.A_BOLD)
    stdscr.attrset(curses.A_BOLD)
    stdscr.bkgd(' ')
    stdscr.bkgd(' ', curses.A_REVERSE)
    stdscr.bkgdset(' ')
    stdscr.bkgdset(' ', curses.A_REVERSE)

    win.border(65, 66, 67, 68,
               69, 70, 71, 72)
    win.border('|', '!', '-', '_',
               '+', '\\', '#', '/')
    try:
        win.border(65, 66, 67, 68,
                   69, [], 71, 72)
    except TypeError:
        pass
    else:
        raise RuntimeError("Expected win.border() to raise TypeError")

    stdscr.clearok(1)

    win4 = stdscr.derwin(2,2)
    win4 = stdscr.derwin(1,1, 5,5)
    win4.mvderwin(9,9)

    stdscr.echochar('a')
    stdscr.echochar('a', curses.A_BOLD)
    stdscr.hline('-', 5)
    stdscr.hline('-', 5, curses.A_BOLD)
    stdscr.hline(1,1,'-', 5)
    stdscr.hline(1,1,'-', 5, curses.A_BOLD)

    stdscr.idcok(1)
    stdscr.idlok(1)
    stdscr.immedok(1)
    stdscr.insch('c')
    stdscr.insdelln(1)
    stdscr.insnstr('abc', 3)
    stdscr.insnstr('abc', 3, curses.A_BOLD)
    stdscr.insnstr(5, 5, 'abc', 3)
    stdscr.insnstr(5, 5, 'abc', 3, curses.A_BOLD)

    stdscr.insstr('def')
    stdscr.insstr('def', curses.A_BOLD)
    stdscr.insstr(5, 5, 'def')
    stdscr.insstr(5, 5, 'def', curses.A_BOLD)
    stdscr.is_linetouched(0)
    stdscr.keypad(1)
    stdscr.leaveok(1)
    stdscr.move(3,3)
    win.mvwin(2,2)
    stdscr.nodelay(1)
    stdscr.notimeout(1)
    win2.overlay(win)
    win2.overwrite(win)
    win2.overlay(win, 1, 2, 2, 1, 3, 3)
    win2.overwrite(win, 1, 2, 2, 1, 3, 3)
    stdscr.redrawln(1,2)

    stdscr.scrollok(1)
    stdscr.scroll()
    stdscr.scroll(2)
    stdscr.scroll(-3)

    stdscr.move(12, 2)
    stdscr.setscrreg(10,15)
    win3 = stdscr.subwin(10,10)
    win3 = stdscr.subwin(10,10, 5,5)
    stdscr.syncok(1)
    stdscr.timeout(5)
    stdscr.touchline(5,5)
    stdscr.touchline(5,5,0)
    stdscr.vline('a', 3)
    stdscr.vline('a', 3, curses.A_STANDOUT)
    stdscr.chgat(5, 2, 3, curses.A_BLINK)
    stdscr.chgat(3, curses.A_BOLD)
    stdscr.chgat(5, 8, curses.A_UNDERLINE)
    stdscr.chgat(curses.A_BLINK)
    stdscr.refresh()

    stdscr.vline(1,1, 'a', 3)
    stdscr.vline(1,1, 'a', 3, curses.A_STANDOUT)

    if hasattr(curses, 'resize'):
        stdscr.resize()
    if hasattr(curses, 'enclose'):
        stdscr.enclose()


def module_funcs(stdscr):
    "Test module-level functions"

    for func in [curses.baudrate, curses.beep, curses.can_change_color,
                 curses.cbreak, curses.def_prog_mode, curses.doupdate,
                 curses.filter, curses.flash, curses.flushinp,
                 curses.has_colors, curses.has_ic, curses.has_il,
                 curses.isendwin, curses.killchar, curses.longname,
                 curses.nocbreak, curses.noecho, curses.nonl,
                 curses.noqiflush, curses.noraw,
                 curses.reset_prog_mode, curses.termattrs,
                 curses.termname, curses.erasechar, curses.getsyx]:
        func()

    # Functions that actually need arguments
    if curses.tigetstr("cnorm"):
        curses.curs_set(1)
    curses.delay_output(1)
    curses.echo() ; curses.echo(1)

    f = tempfile.TemporaryFile()
    stdscr.putwin(f)
    f.seek(0)
    curses.getwin(f)
    f.close()

    curses.halfdelay(1)
    curses.intrflush(1)
    curses.meta(1)
    curses.napms(100)
    curses.newpad(50,50)
    win = curses.newwin(5,5)
    win = curses.newwin(5,5, 1,1)
    curses.nl() ; curses.nl(1)
    curses.putp(b'abc')
    curses.qiflush()
    curses.raw() ; curses.raw(1)
    curses.setsyx(5,5)
    curses.tigetflag('hc')
    curses.tigetnum('co')
    curses.tigetstr('cr')
    curses.tparm(b'cr')
    curses.typeahead(sys.__stdin__.fileno())
    curses.unctrl('a')
    curses.ungetch('a')
    curses.use_env(1)

    # Functions only available on a few platforms
    if curses.has_colors():
        curses.start_color()
        curses.init_pair(2, 1,1)
        curses.color_content(1)
        curses.color_pair(2)
        curses.pair_content(curses.COLOR_PAIRS - 1)
        curses.pair_number(0)

        if hasattr(curses, 'use_default_colors'):
            curses.use_default_colors()

    if hasattr(curses, 'keyname'):
        curses.keyname(13)

    if hasattr(curses, 'has_key'):
        curses.has_key(13)

    if hasattr(curses, 'getmouse'):
        (availmask, oldmask) = curses.mousemask(curses.BUTTON1_PRESSED)
        # availmask indicates that mouse stuff not available.
        if availmask != 0:
            curses.mouseinterval(10)
            # just verify these don't cause errors
            curses.ungetmouse(0, 0, 0, 0, curses.BUTTON1_PRESSED)
            m = curses.getmouse()

    if hasattr(curses, 'is_term_resized'):
        curses.is_term_resized(*stdscr.getmaxyx())
    if hasattr(curses, 'resizeterm'):
        curses.resizeterm(*stdscr.getmaxyx())
    if hasattr(curses, 'resize_term'):
        curses.resize_term(*stdscr.getmaxyx())

def unit_tests():
    from curses import ascii
    for ch, expected in [('a', 'a'), ('A', 'A'),
                         (';', ';'), (' ', ' '),
                         ('\x7f', '^?'), ('\n', '^J'), ('\0', '^@'),
                         # Meta-bit characters
                         ('\x8a', '!^J'), ('\xc1', '!A'),
                         ]:
        if ascii.unctrl(ch) != expected:
            print('curses.unctrl fails on character', repr(ch))


def test_userptr_without_set(stdscr):
    w = curses.newwin(10, 10)
    p = curses.panel.new_panel(w)
    # try to access userptr() before calling set_userptr() -- segfaults
    try:
        p.userptr()
        raise RuntimeError('userptr should fail since not set')
    except curses.panel.error:
        pass

def test_userptr_memory_leak(stdscr):
    w = curses.newwin(10, 10)
    p = curses.panel.new_panel(w)
    obj = object()
    nrefs = sys.getrefcount(obj)
    for i in range(100):
        p.set_userptr(obj)

    p.set_userptr(None)
    if sys.getrefcount(obj) != nrefs:
        raise RuntimeError("set_userptr leaked references")

def test_userptr_segfault(stdscr):
    panel = curses.panel.new_panel(stdscr)
    class A:
        def __del__(self):
            panel.set_userptr(None)
    panel.set_userptr(A())
    panel.set_userptr(None)

def test_resize_term(stdscr):
    if hasattr(curses, 'resizeterm'):
        lines, cols = curses.LINES, curses.COLS
        curses.resizeterm(lines - 1, cols + 1)

        if curses.LINES != lines - 1 or curses.COLS != cols + 1:
            raise RuntimeError("Expected resizeterm to update LINES and COLS")

def test_issue6243(stdscr):
    curses.ungetch(1025)
    stdscr.getkey()

def test_unget_wch(stdscr):
    if not hasattr(curses, 'unget_wch'):
        return
    encoding = stdscr.encoding
    for ch in ('a', '\xe9', '\u20ac', '\U0010FFFF'):
        try:
            ch.encode(encoding)
        except UnicodeEncodeError:
            continue
        try:
            curses.unget_wch(ch)
        except Exception as err:
            raise Exception("unget_wch(%a) failed with encoding %s: %s"
                            % (ch, stdscr.encoding, err))
        read = stdscr.get_wch()
        if read != ch:
            raise AssertionError("%r != %r" % (read, ch))

        code = ord(ch)
        curses.unget_wch(code)
        read = stdscr.get_wch()
        if read != ch:
            raise AssertionError("%r != %r" % (read, ch))

def test_issue10570():
    b = curses.tparm(curses.tigetstr("cup"), 5, 3)
    assert type(b) is bytes
    curses.putp(b)

def test_encoding(stdscr):
    import codecs
    encoding = stdscr.encoding
    codecs.lookup(encoding)
    try:
        stdscr.encoding = 10
    except TypeError:
        pass
    else:
        raise AssertionError("TypeError not raised")
    stdscr.encoding = encoding
    try:
        del stdscr.encoding
    except TypeError:
        pass
    else:
        raise AssertionError("TypeError not raised")

def test_issue21088(stdscr):
    #
    # http://bugs.python.org/issue21088
    #
    # the bug:
    # when converting curses.window.addch to Argument Clinic
    # the first two parameters were switched.

    # if someday we can represent the signature of addch
    # we will need to rewrite this test.
    try:
        signature = inspect.signature(stdscr.addch)
        self.assertFalse(signature)
    except ValueError:
        # not generating a signature is fine.
        pass

    # So.  No signature for addch.
    # But Argument Clinic gave us a human-readable equivalent
    # as the first line of the docstring.  So we parse that,
    # and ensure that the parameters appear in the correct order.
    # Since this is parsing output from Argument Clinic, we can
    # be reasonably certain the generated parsing code will be
    # correct too.
    human_readable_signature = stdscr.addch.__doc__.split("\n")[0]
    offset = human_readable_signature.find("[y, x,]")
    assert offset >= 0, ""

def main(stdscr):
    curses.savetty()
    try:
        module_funcs(stdscr)
        window_funcs(stdscr)
        test_userptr_without_set(stdscr)
        test_userptr_memory_leak(stdscr)
        test_userptr_segfault(stdscr)
        test_resize_term(stdscr)
        test_issue6243(stdscr)
        test_unget_wch(stdscr)
        test_issue10570()
        test_encoding(stdscr)
        test_issue21088(stdscr)
    finally:
        curses.resetty()

def test_main():
    if not sys.__stdout__.isatty():
        raise unittest.SkipTest("sys.__stdout__ is not a tty")
    # testing setupterm() inside initscr/endwin
    # causes terminal breakage
    curses.setupterm(fd=sys.__stdout__.fileno())
    try:
        stdscr = curses.initscr()
        main(stdscr)
    finally:
        curses.endwin()
    unit_tests()

if __name__ == '__main__':
    curses.wrapper(main)
    unit_tests()