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"""Tests for Terminal() sequences and sequence-awareness."""
# -*- coding: utf-8 -*-
# std imports
import sys
import platform
# 3rd party
import pytest
# local
from blessed._compat import StringIO
from .accessories import TestTerminal, unicode_cap, unicode_parm, as_subprocess, MockTigetstr
from .conftest import IS_WINDOWS
try:
from unittest import mock
except ImportError:
import mock
@pytest.mark.skipif(IS_WINDOWS, reason="requires real tty")
def test_capability():
"""Check that capability lookup works."""
@as_subprocess
def child():
# Also test that Terminal grabs a reasonable default stream.
t = TestTerminal()
sc = unicode_cap('sc')
assert t.save == sc
assert t.save == sc # Make sure caching doesn't screw it up.
child()
def test_capability_without_tty():
"""Assert capability templates are '' when stream is not a tty."""
@as_subprocess
def child():
t = TestTerminal(stream=StringIO())
assert t.save == u''
assert t.red == u''
child()
def test_capability_with_forced_tty():
"""force styling should return sequences even for non-ttys."""
@as_subprocess
def child():
t = TestTerminal(stream=StringIO(), force_styling=True)
assert t.save == unicode_cap('sc')
child()
def test_basic_url():
"""force styling should return sequences even for non-ttys."""
@as_subprocess
def child():
# given
t = TestTerminal(stream=StringIO(), force_styling=True)
given_url = 'https://blessed.readthedocs.org'
given_text = 'documentation'
expected_output = ('\x1b]8;;{0}\x1b\\{1}\x1b]8;;\x1b\\'
.format(given_url, given_text))
# exercise
result = t.link(given_url, 'documentation')
# verify
assert repr(result) == repr(expected_output)
child()
def test_url_with_id():
"""force styling should return sequences even for non-ttys."""
@as_subprocess
def child():
# given
t = TestTerminal(stream=StringIO(), force_styling=True)
given_url = 'https://blessed.readthedocs.org'
given_text = 'documentation'
given_url_id = '123'
expected_output = ('\x1b]8;id={0};{1}\x1b\\{2}\x1b]8;;\x1b\\'
.format(given_url_id, given_url, given_text))
# exercise
result = t.link(given_url, 'documentation', given_url_id)
# verify
assert repr(result) == repr(expected_output)
child()
def test_parametrization():
"""Test parameterizing a capability."""
@as_subprocess
def child():
term = TestTerminal(force_styling=True)
assert term.cup(3, 4) == unicode_parm('cup', 3, 4)
child()
def test_height_and_width():
"""Assert that ``height_and_width()`` returns full integers."""
@as_subprocess
def child():
t = TestTerminal() # kind shouldn't matter.
assert isinstance(t.height, int)
assert isinstance(t.width, int)
child()
def test_stream_attr():
"""Make sure Terminal ``stream`` is stdout by default."""
@as_subprocess
def child():
assert TestTerminal().stream == sys.__stdout__
child()
def test_location_with_styling(all_terms):
"""Make sure ``location()`` works on all terminals."""
@as_subprocess
def child_with_styling(kind):
t = TestTerminal(kind=kind, stream=StringIO(), force_styling=True)
with t.location(3, 4):
t.stream.write(u'hi')
expected_output = u''.join(
(unicode_cap('sc') or u'\x1b[s',
unicode_parm('cup', 4, 3),
u'hi',
unicode_cap('rc') or u'\x1b[u'))
assert (t.stream.getvalue() == expected_output)
child_with_styling(all_terms)
def test_location_without_styling():
"""Make sure ``location()`` silently passes without styling."""
@as_subprocess
def child_without_styling():
"""No side effect for location as a context manager without styling."""
t = TestTerminal(stream=StringIO(), force_styling=None)
with t.location(3, 4):
t.stream.write(u'hi')
assert t.stream.getvalue() == u'hi'
child_without_styling()
def test_horizontal_location(all_terms):
"""Make sure we can move the cursor horizontally without changing rows."""
@as_subprocess
def child(kind):
t = TestTerminal(kind=kind, stream=StringIO(), force_styling=True)
with t.location(x=5):
pass
_hpa = unicode_parm('hpa', 5)
if not _hpa and (kind.startswith('screen') or
kind.startswith('ansi')):
_hpa = u'\x1b[6G'
expected_output = u''.join(
(unicode_cap('sc') or u'\x1b[s',
_hpa,
unicode_cap('rc') or u'\x1b[u'))
assert (t.stream.getvalue() == expected_output), (
repr(t.stream.getvalue()), repr(expected_output))
child(all_terms)
def test_vertical_location(all_terms):
"""Make sure we can move the cursor horizontally without changing rows."""
@as_subprocess
def child(kind):
t = TestTerminal(kind=kind, stream=StringIO(), force_styling=True)
with t.location(y=5):
pass
_vpa = unicode_parm('vpa', 5)
if not _vpa and (kind.startswith('screen') or
kind.startswith('ansi')):
_vpa = u'\x1b[6d'
expected_output = u''.join(
(unicode_cap('sc') or u'\x1b[s',
_vpa,
unicode_cap('rc') or u'\x1b[u'))
assert (t.stream.getvalue() == expected_output)
child(all_terms)
@pytest.mark.skipif(IS_WINDOWS, reason="requires multiprocess")
def test_inject_move_x():
"""Test injection of hpa attribute for screen/ansi (issue #55)."""
@as_subprocess
def child(kind):
t = TestTerminal(kind=kind, stream=StringIO(), force_styling=True)
COL = 5
with mock.patch('curses.tigetstr', side_effect=MockTigetstr(hpa=None)):
with t.location(x=COL):
pass
expected_output = u''.join(
(unicode_cap('sc') or u'\x1b[s',
u'\x1b[{0}G'.format(COL + 1),
unicode_cap('rc') or u'\x1b[u'))
assert (t.stream.getvalue() == expected_output)
assert (t.move_x(COL) == u'\x1b[{0}G'.format(COL + 1))
child('screen')
child('screen-256color')
child('ansi')
@pytest.mark.skipif(IS_WINDOWS, reason="requires multiprocess")
def test_inject_move_y():
"""Test injection of vpa attribute for screen/ansi (issue #55)."""
@as_subprocess
def child(kind):
t = TestTerminal(kind=kind, stream=StringIO(), force_styling=True)
ROW = 5
with mock.patch('curses.tigetstr', side_effect=MockTigetstr(vpa=None)):
with t.location(y=ROW):
pass
expected_output = u''.join(
(unicode_cap('sc') or u'\x1b[s',
u'\x1b[{0}d'.format(ROW + 1),
unicode_cap('rc') or u'\x1b[u'))
assert (t.stream.getvalue() == expected_output)
assert (t.move_y(ROW) == u'\x1b[{0}d'.format(ROW + 1))
child('screen')
child('screen-256color')
child('ansi')
@pytest.mark.skipif(IS_WINDOWS, reason="requires multiprocess")
def test_inject_civis_and_cnorm_for_ansi():
"""Test injection of civis attribute for ansi."""
@as_subprocess
def child(kind):
t = TestTerminal(kind=kind, stream=StringIO(), force_styling=True)
with t.hidden_cursor():
pass
expected_output = u'\x1b[?25l\x1b[?25h'
assert (t.stream.getvalue() == expected_output)
child('ansi')
@pytest.mark.skipif(IS_WINDOWS, reason="requires multiprocess")
def test_inject_sc_and_rc_for_ansi():
"""Test injection of sc and rc (save and restore cursor) for ansi."""
@as_subprocess
def child(kind):
t = TestTerminal(kind=kind, stream=StringIO(), force_styling=True)
with t.location():
pass
expected_output = u'\x1b[s\x1b[u'
assert (t.stream.getvalue() == expected_output)
child('ansi')
def test_zero_location(all_terms):
"""Make sure ``location()`` pays attention to 0-valued args."""
@as_subprocess
def child(kind):
t = TestTerminal(kind=kind, stream=StringIO(), force_styling=True)
with t.location(0, 0):
pass
expected_output = u''.join(
(unicode_cap('sc') or u'\x1b[s',
unicode_parm('cup', 0, 0),
unicode_cap('rc') or u'\x1b[u'))
assert (t.stream.getvalue() == expected_output)
child(all_terms)
def test_mnemonic_colors(all_terms):
"""Make sure color shortcuts work."""
# pylint: disable=consider-using-ternary
@as_subprocess
def child(kind):
def color(t, num):
return t.number_of_colors and unicode_parm('setaf', num) or ''
def on_color(t, num):
return t.number_of_colors and unicode_parm('setab', num) or ''
# Avoid testing red, blue, yellow, and cyan, since they might someday
# change depending on terminal type.
t = TestTerminal(kind=kind)
assert (t.white == color(t, 7))
assert (t.green == color(t, 2)) # Make sure it's different than white.
assert (t.on_black == on_color(t, 0))
assert (t.on_green == on_color(t, 2))
assert (t.bright_black == color(t, 8))
assert (t.bright_green == color(t, 10))
assert (t.on_bright_black == on_color(t, 8))
assert (t.on_bright_green == on_color(t, 10))
child(all_terms)
def test_callable_numeric_colors(all_terms):
"""``color(n)`` should return a formatting wrapper."""
@as_subprocess
def child(kind):
t = TestTerminal(kind=kind)
if t.magenta:
assert t.color(5)('smoo') == t.magenta + 'smoo' + t.normal
else:
assert t.color(5)('smoo') == 'smoo'
if t.on_magenta:
assert t.on_color(5)('smoo') == t.on_magenta + 'smoo' + t.normal
else:
assert t.color(5)(u'smoo') == 'smoo'
if t.color(4):
assert t.color(4)(u'smoo') == t.color(4) + u'smoo' + t.normal
else:
assert t.color(4)(u'smoo') == 'smoo'
if t.on_green:
assert t.on_color(2)('smoo') == t.on_green + u'smoo' + t.normal
else:
assert t.on_color(2)('smoo') == 'smoo'
if t.on_color(6):
assert t.on_color(6)('smoo') == t.on_color(6) + u'smoo' + t.normal
else:
assert t.on_color(6)('smoo') == 'smoo'
child(all_terms)
def test_null_callable_numeric_colors(all_terms):
"""``color(n)`` should be a no-op on null terminals."""
@as_subprocess
def child(kind):
t = TestTerminal(stream=StringIO(), kind=kind)
assert (t.color(5)('smoo') == 'smoo')
assert (t.on_color(6)('smoo') == 'smoo')
child(all_terms)
def test_naked_color_cap(all_terms):
"""``term.color`` should return a stringlike capability."""
@as_subprocess
def child(kind):
t = TestTerminal(kind=kind)
assert (t.color + '' == t.setaf + '')
child(all_terms)
def test_formatting_functions(all_terms):
"""Test simple and compound formatting wrappers."""
@as_subprocess
def child(kind):
t = TestTerminal(kind=kind)
# test simple sugar,
expected_output = u''.join((t.bold, u'hi', t.normal)) if t.bold else u'hi'
assert t.bold(u'hi') == expected_output
# Plain strs for Python 2.x
expected_output = u''.join((t.green, 'hi', t.normal)) if t.green else u'hi'
assert t.green('hi') == expected_output
# Test unicode
if t.underline:
expected_output = u''.join((t.underline, u'boö', t.normal))
else:
expected_output = u'boö'
assert (t.underline(u'boö') == expected_output)
child(all_terms)
def test_compound_formatting(all_terms):
"""Test simple and compound formatting wrappers."""
@as_subprocess
def child(kind):
t = TestTerminal(kind=kind)
if any((t.bold, t.green)):
expected_output = u''.join((t.bold, t.green, u'boö', t.normal))
else:
expected_output = u'boö'
assert t.bold_green(u'boö') == expected_output
if any((t.on_bright_red, t.bold, t.bright_green, t.underline)):
expected_output = u''.join(
(t.on_bright_red, t.bold, t.bright_green, t.underline, u'meh',
t.normal))
else:
expected_output = u'meh'
very_long_cap = t.on_bright_red_bold_bright_green_underline
assert (very_long_cap('meh') == expected_output)
child(all_terms)
def test_nested_formatting(all_terms):
"""Test complex nested compound formatting, wow!"""
@as_subprocess
def child(kind):
t = TestTerminal(kind=kind)
# Test deeply nested styles
given = t.green('-a-', t.bold('-b-', t.underline('-c-'),
'-d-'),
'-e-')
expected = u''.join((
t.green, '-a-', t.bold, '-b-', t.underline, '-c-', t.normal,
t.green, t.bold, '-d-',
t.normal, t.green, '-e-', t.normal))
assert given == expected
# Test off-and-on nested styles
given = t.green('off ', t.underline('ON'),
' off ', t.underline('ON'),
' off')
expected = u''.join((
t.green, 'off ', t.underline, 'ON',
t.normal, t.green, ' off ', t.underline, 'ON',
t.normal, t.green, ' off', t.normal))
assert given == expected
def test_formatting_functions_without_tty(all_terms):
"""Test crazy-ass formatting wrappers when there's no tty."""
@as_subprocess
def child(kind):
t = TestTerminal(kind=kind, stream=StringIO(), force_styling=False)
assert (t.bold(u'hi') == u'hi')
assert (t.green('hi') == u'hi')
# Test non-ASCII chars, no longer really necessary:
assert (t.bold_green(u'boö') == u'boö')
assert (t.bold_underline_green_on_red('loo') == u'loo')
# Test deeply nested styles
given = t.green('-a-', t.bold('-b-', t.underline('-c-'),
'-d-'),
'-e-')
expected = u'-a--b--c--d--e-'
assert given == expected
# Test off-and-on nested styles
given = t.green('off ', t.underline('ON'),
' off ', t.underline('ON'),
' off')
expected = u'off ON off ON off'
assert given == expected
assert (t.on_bright_red_bold_bright_green_underline('meh') == u'meh')
child(all_terms)
def test_nice_formatting_errors(all_terms):
"""Make sure you get nice hints if you misspell a formatting wrapper."""
@as_subprocess
def child(kind):
t = TestTerminal(kind=kind)
try:
t.bold_misspelled('hey')
assert not t.is_a_tty, 'Should have thrown exception'
except TypeError as e:
assert 'Unknown terminal capability,' in e.args[0]
try:
t.bold_misspelled(u'hey') # unicode
assert not t.is_a_tty, 'Should have thrown exception'
except TypeError as e:
assert 'Unknown terminal capability,' in e.args[0]
try:
t.bold_misspelled(None) # an arbitrary non-string
assert not t.is_a_tty, 'Should have thrown exception'
except TypeError as e:
assert 'Unknown terminal capability,' not in e.args[0]
if platform.python_implementation() != 'PyPy':
# PyPy fails to toss an exception, Why?!
try:
t.bold_misspelled('a', 'b') # >1 string arg
assert not t.is_a_tty, 'Should have thrown exception'
except TypeError as e:
assert 'Unknown terminal capability,' in e.args[0], e.args
child(all_terms)
def test_null_callable_string(all_terms):
"""Make sure NullCallableString tolerates all kinds of args."""
@as_subprocess
def child(kind):
t = TestTerminal(stream=StringIO(), kind=kind)
assert (t.clear == '')
assert (t.move(False) == '')
assert (t.move_x(1) == '')
assert (t.bold() == '')
assert (t.bold('', 'x', 'huh?') == 'xhuh?')
assert (t.clear('x') == 'x')
child(all_terms)
def test_padd():
"""Test Terminal.padd(seq)."""
@as_subprocess
def child(kind):
from blessed.sequences import Sequence
from blessed import Terminal
term = Terminal(kind)
assert Sequence('xyz\b', term).padd() == u'xy'
assert Sequence('xyz\b-', term).padd() == u'xy-'
assert Sequence('xxxx\x1b[3Dzz', term).padd() == u'xzz'
assert Sequence('\x1b[3D', term).padd() == u'' # "Trim left"
assert Sequence(term.red('xxxx\x1b[3Dzz'), term).padd() == term.red(u'xzz')
kind = 'vtwin10' if IS_WINDOWS else 'xterm-256color'
child(kind)
def test_split_seqs(all_terms):
"""Test Terminal.split_seqs."""
@as_subprocess
def child(kind):
from blessed import Terminal
term = Terminal(kind)
if term.sc and term.rc:
given_text = term.sc + 'AB' + term.rc + 'CD'
expected = [term.sc, 'A', 'B', term.rc, 'C', 'D']
result = list(term.split_seqs(given_text))
assert result == expected
child(all_terms)
def test_split_seqs_maxsplit1(all_terms):
"""Test Terminal.split_seqs with maxsplit=1."""
@as_subprocess
def child(kind):
from blessed import Terminal
term = Terminal(kind)
if term.bold:
given_text = term.bold + 'bbq'
expected = [term.bold, 'bbq']
result = list(term.split_seqs(given_text, 1))
assert result == expected
child(all_terms)
def test_split_seqs_term_right(all_terms):
"""Test Terminal.split_seqs with parameterized sequence"""
@as_subprocess
def child(kind):
from blessed import Terminal
term = Terminal(kind)
if term.move_up:
given_text = 'XY' + term.move_right + 'VK'
expected = ['X', 'Y', term.move_right, 'V', 'K']
result = list(term.split_seqs(given_text))
assert result == expected
child(all_terms)
def test_split_seqs_maxsplit3_and_term_right(all_terms):
"""Test Terminal.split_seqs with parameterized sequence."""
@as_subprocess
def child(kind):
from blessed import Terminal
term = Terminal(kind)
if term.move_right(32):
given_text = 'PQ' + term.move_right(32) + 'RS'
expected = ['P', 'Q', term.move_right(32), 'RS']
result = list(term.split_seqs(given_text, 3))
assert result == expected
if term.move_up(45):
given_text = 'XY' + term.move_up(45) + 'VK'
expected = ['X', 'Y', term.move_up(45), 'V', 'K']
result = list(term.split_seqs(given_text))
assert result == expected
child(all_terms)
def test_formatting_other_string(all_terms):
"""FormattingOtherString output depends on how it's called"""
@as_subprocess
def child(kind):
t = TestTerminal(stream=StringIO(), kind=kind, force_styling=True)
assert (t.move_left == t.cub1)
assert (t.move_left() == t.cub1)
assert (t.move_left(2) == t.cub(2))
assert (t.move_right == t.cuf1)
assert (t.move_right() == t.cuf1)
assert (t.move_right(2) == t.cuf(2))
assert (t.move_up == t.cuu1)
assert (t.move_up() == t.cuu1)
assert (t.move_up(2) == t.cuu(2))
assert (t.move_down == t.cud1)
assert (t.move_down() == t.cud1)
assert (t.move_down(2) == t.cud(2))
child(all_terms)
def test_termcap_match_optional():
"""When match_optional is given, numeric matches are optional"""
from blessed.sequences import Termcap
@as_subprocess
def child():
t = TestTerminal(force_styling=True)
cap = Termcap.build('move_right', t.cuf, 'cuf', nparams=1,
match_grouped=True, match_optional=True)
# Digits absent
assert cap.re_compiled.match(t.cuf1).group(1) is None
# Digits present
assert cap.re_compiled.match(t.cuf()).group(1) == '0'
assert cap.re_compiled.match(t.cuf(1)).group(1) == '1'
assert cap.re_compiled.match(t.cuf(22)).group(1) == '22'
# Make sure match is not too generalized
assert cap.re_compiled.match(t.cub(2)) is None
assert cap.re_compiled.match(t.cub1) is None
child()
def test_truncate(all_terms):
"""Test terminal.truncate and make sure it agrees with terminal.length"""
@as_subprocess
def child(kind):
from blessed import Terminal
term = Terminal(kind)
test_string = term.red("Testing ") + term.yellow("makes ") +\
term.green("me ") + term.blue("feel ") +\
term.indigo("good") + term.normal
stripped_string = term.strip_seqs(test_string)
for i in range(len(stripped_string)):
test_l = term.length(term.truncate(test_string, i))
assert test_l == len(stripped_string[:i])
test_nogood = term.red("Testing ") + term.yellow("makes ") +\
term.green("me ") + term.blue("feel ") +\
term.indigo("") + term.normal
trunc = term.truncate(test_string, term.length(test_string) - len("good"))
assert trunc == test_nogood
child(all_terms)
def test_truncate_wide_end(all_terms):
"""Ensure that terminal.truncate has the correct behaviour for wide characters."""
@as_subprocess
def child(kind):
from blessed import Terminal
term = Terminal(kind)
test_string = u"AB\uff23" # ABC
assert term.truncate(test_string, 3) == u"AB"
child(all_terms)
def test_truncate_wcwidth_clipping(all_terms):
"""Ensure that terminal.truncate has the correct behaviour for wide characters."""
@as_subprocess
def child(kind):
from blessed import Terminal
term = Terminal(kind)
assert term.truncate("", 4) == ""
test_string = term.blue(u"one\x01two")
assert term.truncate(test_string, 4) == term.blue(u"one\x01t")
child(all_terms)
def test_truncate_padding(all_terms):
"""Ensure that terminal.truncate has the correct behaviour for wide characters."""
@as_subprocess
def child(kind):
from blessed import Terminal
term = Terminal(kind)
if term.move_right(5):
test_right_string = term.blue(u"one" + term.move_right(5) + u"two")
assert term.truncate(test_right_string, 9) == term.blue(u"one t")
test_bs_string = term.blue(u"one\b\b\btwo")
assert term.truncate(test_bs_string, 3) == term.blue(u"two")
if all_terms != 'vtwin10':
# padding doesn't work the same on windows !
child(all_terms)
def test_truncate_default(all_terms):
"""Ensure that terminal.truncate functions with the default argument."""
@as_subprocess
def child(kind):
from blessed import Terminal
term = Terminal(kind)
test = "Testing " + term.red("attention ") + term.blue("please.")
trunc = term.truncate(test)
assert term.length(trunc) <= term.width
assert term.truncate(term.red('x' * 1000)) == term.red('x' * term.width)
child(all_terms)
@pytest.mark.skipif(sys.version_info[:2] < (3, 8), reason="Only supported on Python >= 3.8")
def test_supports_index(all_terms):
"""Ensure sequence formatting methods support objects with __index__()"""
@as_subprocess
def child(kind):
from blessed.sequences import Sequence
from blessed.terminal import Terminal
class Indexable: # pylint: disable=too-few-public-methods
"""Custom class implementing __index__()"""
def __index__(self):
return 100
term = Terminal(kind)
seq = Sequence('abcd', term)
indexable = Indexable()
assert seq.rjust(100) == seq.rjust(indexable)
assert seq.ljust(100) == seq.ljust(indexable)
assert seq.center(100) == seq.center(indexable)
assert seq.truncate(100) == seq.truncate(indexable)
seq = Sequence('abcd' * 30, term)
assert seq.truncate(100) == seq.truncate(indexable)
kind = 'vtwin10' if IS_WINDOWS else 'xterm-256color'
child(kind)
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