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#!/usr/bin/env python3
import unittest
from saneterm.color import Color, ColorType
from saneterm.pty import PositionedIterator
from gi.repository import Gdk
TEST_STRING = 'foo;bar'
class TestPositionedIterator(unittest.TestCase):
"""Tests for saneterm.pty.PositionedIterator"""
def test_lossless(self):
"""Test that the iterator doesn't loose any content"""
it = PositionedIterator(TEST_STRING)
self.assertEqual([x for x in it], list(TEST_STRING))
self.assertEqual(it.wrapped, TEST_STRING)
def test_indices(self):
"""Test that the iterator's pos matches the string indices"""
it = PositionedIterator(TEST_STRING)
self.assertEqual(it.pos, -1)
for x in it:
assert x == TEST_STRING[it.pos]
if x == ';':
break
self.assertEqual(it.pos, 3)
for x in it:
self.assertEqual(x, it.wrapped[it.pos])
self.assertTrue(it.empty())
def test_backtracking(self):
"""Test waypoint() and backtrack() methods"""
it = PositionedIterator(TEST_STRING)
semicolon_index = None
for x in it:
if x == ';':
it.waypoint()
semicolon_index = it.pos
self.assertEqual(semicolon_index, TEST_STRING.index(';'))
self.assertTrue(it.empty())
with self.assertRaises(StopIteration):
_ = it.next()
it.backtrack()
self.assertEqual(it.next(), ';')
self.assertEqual(it.pos, semicolon_index)
def test_takewhile_greedy(self):
"""Test takewhile_greedy() method"""
it = PositionedIterator(TEST_STRING)
s = it.takewhile_greedy(lambda x: x != ';')
self.assertEqual(s, TEST_STRING.split(';')[0])
self.assertEqual(it.pos, len(s) - 1)
self.assertEqual(it.next(), ';')
def test_empty(self):
"""Test empty() predicate"""
it = PositionedIterator(TEST_STRING)
for x in it:
if it.pos + 1 == len(TEST_STRING):
self.assertTrue(it.empty())
self.assertTrue(it.empty())
with self.assertRaises(StopIteration):
_ = it.next()
def test_take(self):
"""Test take() method"""
length = 3
it1 = PositionedIterator(TEST_STRING)
it2 = PositionedIterator(TEST_STRING)
s1 = it1.take(length)
s2 = ''
for x in it2:
if it2.pos >= length:
break
else:
s2 += x
self.assertEqual(s1, s2)
self.assertEqual(s1, TEST_STRING[0:length])
# using take does not consume the next element!
self.assertEqual(it1.pos, length - 1)
class TestColor(unittest.TestCase):
"""Tests for saneterm.color"""
def test_256_colors(self):
"""
Check divmod based RGB value calculation
against 256 color table generation as implemented
in XTerm's 256colres.pl.
"""
def channel_val(c):
return (c * 40 + 55 if c > 0 else 0) / 255
for r in range(6):
for g in range(6):
for b in range(6):
n = 16 + (r * 36) + (g * 6) + b
expected = Gdk.RGBA(*map(channel_val, (r, g, b)))
col = Color(ColorType.NUMBERED_256, n).to_gdk()
self.assertTrue(
expected.equal(col),
'Color {}: expected: {}; got: {}'.format(
n, expected.to_string(), col.to_string()
)
)
if __name__ == '__main__':
unittest.main()
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