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[3.9] bpo-42681: Fix test_curses failures related to color pairs (GH-24089) (GH-24113)

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On ncurses 6.1 pair numbers are limited by SHORT_MAX-1.

Improve error reporting and tests for color functions.
(cherry picked from commit 59f9b4e450)
This commit is contained in:
Serhiy Storchaka 2021-01-05 14:23:19 +02:00 • committed by GitHub
parent d82392face
commit 9b3a53a826
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GPG key ID: 4AEE18F83AFDEB23
2 changed files with 44 additions and 15 deletions
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33
Lib/test/test_curses.py
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@ -323,11 +323,20 @@ class TestCurses(unittest.TestCase):
def bad_pairs(self):
return (-2**31 - 1, 2**31, -2**63 - 1, 2**63, 2**64)
def test_start_color(self):
if not curses.has_colors():
self.skipTest('requires colors support')
curses.start_color()
if verbose:
print(f'COLORS = {curses.COLORS}', file=sys.stderr)
print(f'COLOR_PAIRS = {curses.COLOR_PAIRS}', file=sys.stderr)
@requires_colors
def test_color_content(self):
self.assertEqual(curses.color_content(curses.COLOR_BLACK), (0, 0, 0))
curses.color_content(0)
curses.color_content(min(curses.COLORS - 1, SHORT_MAX))
maxcolor = min(curses.COLORS - 1, SHORT_MAX)
curses.color_content(maxcolor)
for color in self.bad_colors():
self.assertRaises(OverflowError, curses.color_content, color)
@ -368,13 +377,18 @@ class TestCurses(unittest.TestCase):
self.assertRaises(curses.error, curses.init_color, 0, 0, comp, 0)
self.assertRaises(curses.error, curses.init_color, 0, 0, 0, comp)
def get_pair_limit(self):
return min(curses.COLOR_PAIRS, SHORT_MAX)
@requires_colors
def test_pair_content(self):
if not hasattr(curses, 'use_default_colors'):
self.assertEqual(curses.pair_content(0),
(curses.COLOR_WHITE, curses.COLOR_BLACK))
curses.pair_content(0)
curses.pair_content(min(curses.COLOR_PAIRS - 1, SHORT_MAX))
maxpair = self.get_pair_limit() - 1
if maxpair > 0:
curses.pair_content(maxpair)
for pair in self.bad_pairs():
self.assertRaises(OverflowError, curses.pair_content, pair)
@ -389,11 +403,14 @@ class TestCurses(unittest.TestCase):
curses.init_pair(1, 0, 0)
self.assertEqual(curses.pair_content(1), (0, 0))
maxcolor = min(curses.COLORS - 1, SHORT_MAX)
curses.init_pair(1, maxcolor, maxcolor)
self.assertEqual(curses.pair_content(1), (maxcolor, maxcolor))
maxpair = min(curses.COLOR_PAIRS - 1, SHORT_MAX)
curses.init_pair(maxpair, 2, 3)
self.assertEqual(curses.pair_content(maxpair), (2, 3))
curses.init_pair(1, maxcolor, 0)
self.assertEqual(curses.pair_content(1), (maxcolor, 0))
curses.init_pair(1, 0, maxcolor)
self.assertEqual(curses.pair_content(1), (0, maxcolor))
maxpair = self.get_pair_limit() - 1
if maxpair > 1:
curses.init_pair(maxpair, 0, 0)
self.assertEqual(curses.pair_content(maxpair), (0, 0))
for pair in self.bad_pairs():
self.assertRaises(OverflowError, curses.init_pair, pair, 0, 0)
@ -591,6 +608,8 @@ class MiscTests(unittest.TestCase):
@requires_curses_func('ncurses_version')
def test_ncurses_version(self):
v = curses.ncurses_version
if verbose:
print(f'ncurses_version = {curses.ncurses_version}', flush=True)
self.assertIsInstance(v[:], tuple)
self.assertEqual(len(v), 3)
self.assertIsInstance(v[0], int)