"""Tests for the progress bar"""
# TODO: Running these on a tty of type "xterm" fails.

try:
    from io import StringIO
except ImportError:
    from io import StringIO

from blessings import Terminal
from nose.tools import eq_

from noseprogressive.bar import ProgressBar


class MockTerminal(Terminal):
    @property
    def width(self):
        return 50

    @property
    def height(self):
        return 24


class MonochromeTerminal(MockTerminal):
    """Work around color reporting never going back to 0 once it's been 256."""
    @property
    def number_of_colors(self):
        return 0


def test_color_bar_half():
    """Assert that a half-filled 16-color bar draws properly."""
    out = StringIO()
    term = MockTerminal(kind='xterm-256color', stream=out, force_styling=True)
    bar = ProgressBar(28, term)

    bar.update('HI', 14)
    eq_(out.getvalue(), ''.join([term.save,
                                 term.move(24, 0),
                                 term.bold('HI                                '),
                                 '  ',
                                 term.on_color(8)('       '),
                                 term.on_color(7)('       '),
                                 term.restore]))

def test_color_bar_full():
    """Assert that a complete 16-color bar draws properly."""
    out = StringIO()
    term = MockTerminal(kind='xterm-256color', stream=out, force_styling=True)
    bar = ProgressBar(28, term)

    bar.update('HI', 28)
    eq_(out.getvalue(), ''.join([term.save,
                                 term.move(24, 0),
                                 term.bold('HI                                '),
                                 '  ',
                                 term.on_color(8)('              '),
                                 term.on_color(7)(''),
                                 term.restore]))


def test_monochrome_bar():
    """Assert that the black-and-white bar draws properly when < 16 colors are available."""
    out = StringIO()
    term = MonochromeTerminal(kind='xterm', stream=out, force_styling=True)
    assert term.number_of_colors < 16
    bar = ProgressBar(28, term)

    bar.update('HI', 14)
    eq_(out.getvalue(), ''.join([term.save,
                                 term.move(24, 0),
                                 term.bold('HI                                '),
                                 '  ',
                                 term.reverse('       '),
                                 '_______',
                                 term.restore]))
