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# -*- coding: utf-8 -*-
"""Tests color algorithms."""
# std imports
import re
# 3rd party
import pytest
# local
from blessed.color import COLOR_DISTANCE_ALGORITHMS
from blessed.colorspace import RGBColor
from blessed.formatters import FormattingString, NullCallableString
# local
from .accessories import TestTerminal, as_subprocess
@pytest.fixture(params=COLOR_DISTANCE_ALGORITHMS.keys())
def all_algorithms(request):
"""All color distance algorithms."""
return request.param
def test_same_color(all_algorithms): # pylint: disable=redefined-outer-name
"""The same color should have 0 distance."""
color = (0, 0, 0)
assert COLOR_DISTANCE_ALGORITHMS[all_algorithms](color, color) == 0
color = (255, 255, 255)
assert COLOR_DISTANCE_ALGORITHMS[all_algorithms](color, color) == 0
color = (55, 234, 102)
assert COLOR_DISTANCE_ALGORITHMS[all_algorithms](color, color) == 0
def test_different_color(all_algorithms): # pylint: disable=redefined-outer-name
"""Different colors should have positive distance."""
color1 = (0, 0, 0)
color2 = (0, 0, 1)
assert COLOR_DISTANCE_ALGORITHMS[all_algorithms](color1, color2) > 0
color1 = (25, 30, 4)
color2 = (4, 30, 25)
assert COLOR_DISTANCE_ALGORITHMS[all_algorithms](color1, color2) > 0
color1 = (200, 200, 200)
color2 = (100, 100, 101)
assert COLOR_DISTANCE_ALGORITHMS[all_algorithms](color1, color2) > 0
def test_color_rgb():
"""Ensure expected sequence is returned"""
@as_subprocess
def child():
t = TestTerminal(force_styling=True)
color_patterns = r'%s|%s' % (t.caps['color'].pattern, t.caps['color256'].pattern)
t.number_of_colors = 1 << 24
assert t.color_rgb(0, 0, 0)('smoo') == u'\x1b[38;2;0;0;0msmoo' + t.normal
assert t.color_rgb(84, 192, 233)('smoo') == u'\x1b[38;2;84;192;233msmoo' + t.normal
t.number_of_colors = 256
assert t.color_rgb(0, 0, 0)('smoo') == t.black + 'smoo' + t.normal
assert re.match(color_patterns, t.color_rgb(84, 192, 233))
child()
def test_on_color_rgb():
"""Ensure expected sequence is returned"""
@as_subprocess
def child():
t = TestTerminal(force_styling=True)
color_patterns = r'%s|%s' % (t.caps['color'].pattern, t.caps['on_color256'].pattern)
t.number_of_colors = 1 << 24
assert t.on_color_rgb(0, 0, 0)('smoo') == u'\x1b[48;2;0;0;0msmoo' + t.normal
assert t.on_color_rgb(84, 192, 233)('smoo') == u'\x1b[48;2;84;192;233msmoo' + t.normal
t.number_of_colors = 256
assert t.on_color_rgb(0, 0, 0)('smoo') == t.on_black + 'smoo' + t.normal
assert re.match(color_patterns, t.on_color_rgb(84, 192, 233))
child()
def test_set_number_of_colors():
"""Ensure number of colors is supported and cache is cleared"""
@as_subprocess
def child():
t = TestTerminal(force_styling=True)
for num in (0, 4, 8, 16, 256, 1 << 24):
t.aqua # pylint: disable=pointless-statement
assert 'aqua' in dir(t)
t.number_of_colors = num
assert t.number_of_colors == num
assert 'aqua' not in dir(t)
t.number_of_colors = 88
assert t.number_of_colors == 16
with pytest.raises(AssertionError):
t.number_of_colors = 40
child()
def test_set_color_distance_algorithm():
"""Ensure algorithm is supported and cache is cleared"""
@as_subprocess
def child():
t = TestTerminal(force_styling=True)
for algo in COLOR_DISTANCE_ALGORITHMS:
t.aqua # pylint: disable=pointless-statement
assert 'aqua' in dir(t)
t.color_distance_algorithm = algo
assert t.color_distance_algorithm == algo
assert 'aqua' not in dir(t)
with pytest.raises(AssertionError):
t.color_distance_algorithm = 'EenieMeenieMineyMo'
child()
def test_RGBColor():
"""Ensure string is hex color representation"""
color = RGBColor(0x5a, 0x05, 0xcb)
assert str(color) == '#5a05cb'
def test_formatter():
"""Ensure return values match terminal attributes"""
@as_subprocess
def child():
t = TestTerminal(force_styling=True)
t.number_of_colors = 1 << 24
bold_on_seagreen = t.formatter('bold_on_seagreen')
assert isinstance(bold_on_seagreen, FormattingString)
assert bold_on_seagreen == t.bold_on_seagreen
t.number_of_colors = 0
bold_on_seagreen = t.formatter('bold_on_seagreen')
assert isinstance(bold_on_seagreen, FormattingString)
assert bold_on_seagreen == t.bold_on_seagreen
bold = t.formatter('bold')
assert isinstance(bold, FormattingString)
assert bold == t.bold
t = TestTerminal()
t._does_styling = False
t.number_of_colors = 0
bold_on_seagreen = t.formatter('bold_on_seagreen')
assert isinstance(bold_on_seagreen, NullCallableString)
assert bold_on_seagreen == t.bold_on_seagreen
child()
def test_formatter_invalid():
"""Ensure NullCallableString for invalid formatters"""
@as_subprocess
def child():
t = TestTerminal(force_styling=True)
assert isinstance(t.formatter('csr'), NullCallableString)
child()
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