toot/tests/test_utils.py

from toot.wcstring import wc_wrap, trunc, pad, fit_text


def test_pad():
    # guitar symbol will occupy two cells, so padded text should be 1
    # character shorter
    text = 'Frank Zappa 🎸'

    # Negative values are basically ignored
    assert pad(text, -100) is text

    # Padding to length smaller than text length does nothing
    assert pad(text, 11) is text
    assert pad(text, 12) is text
    assert pad(text, 13) is text
    assert pad(text, 14) is text

    assert pad(text, 15) == 'Frank Zappa 🎸 '
    assert pad(text, 16) == 'Frank Zappa 🎸  '
    assert pad(text, 17) == 'Frank Zappa 🎸   '
    assert pad(text, 18) == 'Frank Zappa 🎸    '
    assert pad(text, 19) == 'Frank Zappa 🎸     '
    assert pad(text, 20) == 'Frank Zappa 🎸      '


def test_trunc():
    text = 'Frank Zappa 🎸'

    assert trunc(text, 1)  == '…'
    assert trunc(text, 2)  == 'F…'
    assert trunc(text, 3)  == 'Fr…'
    assert trunc(text, 4)  == 'Fra…'
    assert trunc(text, 5)  == 'Fran…'
    assert trunc(text, 6)  == 'Frank…'
    assert trunc(text, 7)  == 'Frank…'
    assert trunc(text, 8)  == 'Frank Z…'
    assert trunc(text, 9)  == 'Frank Za…'
    assert trunc(text, 10) == 'Frank Zap…'
    assert trunc(text, 11) == 'Frank Zapp…'
    assert trunc(text, 12) == 'Frank Zappa…'
    assert trunc(text, 13) == 'Frank Zappa…'

    # Truncating to length larger than text length does nothing
    assert trunc(text, 14) is text
    assert trunc(text, 15) is text
    assert trunc(text, 16) is text
    assert trunc(text, 17) is text
    assert trunc(text, 18) is text
    assert trunc(text, 19) is text
    assert trunc(text, 20) is text


def test_fit_text():
    text = 'Frank Zappa 🎸'

    assert fit_text(text, 1)  == '…'
    assert fit_text(text, 2)  == 'F…'
    assert fit_text(text, 3)  == 'Fr…'
    assert fit_text(text, 4)  == 'Fra…'
    assert fit_text(text, 5)  == 'Fran…'
    assert fit_text(text, 6)  == 'Frank…'
    assert fit_text(text, 7)  == 'Frank…'
    assert fit_text(text, 8)  == 'Frank Z…'
    assert fit_text(text, 9)  == 'Frank Za…'
    assert fit_text(text, 10) == 'Frank Zap…'
    assert fit_text(text, 11) == 'Frank Zapp…'
    assert fit_text(text, 12) == 'Frank Zappa…'
    assert fit_text(text, 13) == 'Frank Zappa…'
    assert fit_text(text, 14) == 'Frank Zappa 🎸'
    assert fit_text(text, 15) == 'Frank Zappa 🎸 '
    assert fit_text(text, 16) == 'Frank Zappa 🎸  '
    assert fit_text(text, 17) == 'Frank Zappa 🎸   '
    assert fit_text(text, 18) == 'Frank Zappa 🎸    '
    assert fit_text(text, 19) == 'Frank Zappa 🎸     '
    assert fit_text(text, 20) == 'Frank Zappa 🎸      '


def test_wc_wrap_plain_text():
    lorem = (
        "Eius voluptas eos praesentium et tempore. Quaerat nihil voluptatem "
        "excepturi reiciendis sapiente voluptate natus. Tenetur occaecati "
        "velit dicta dolores. Illo reiciendis nulla ea. Facilis nostrum non "
        "qui inventore sit."
    )

    assert list(wc_wrap(lorem, 50)) == [
        #01234567890123456789012345678901234567890123456789 # noqa
        "Eius voluptas eos praesentium et tempore. Quaerat",
        "nihil voluptatem excepturi reiciendis sapiente",
        "voluptate natus. Tenetur occaecati velit dicta",
        "dolores. Illo reiciendis nulla ea. Facilis nostrum",
        "non qui inventore sit.",
    ]


def test_wc_wrap_plain_text_wrap_on_any_whitespace():
    lorem = (
        "Eius\t\tvoluptas\teos\tpraesentium\tet\ttempore.\tQuaerat\tnihil\tvoluptatem\t"
        "excepturi\nreiciendis\n\nsapiente\nvoluptate\nnatus.\nTenetur\noccaecati\n"
        "velit\rdicta\rdolores.\rIllo\rreiciendis\rnulla\r\r\rea.\rFacilis\rnostrum\rnon\r"
        "qui\u2003inventore\u2003\u2003sit."  # em space
    )

    assert list(wc_wrap(lorem, 50)) == [
        #01234567890123456789012345678901234567890123456789 # noqa
        "Eius voluptas eos praesentium et tempore. Quaerat",
        "nihil voluptatem excepturi reiciendis sapiente",
        "voluptate natus. Tenetur occaecati velit dicta",
        "dolores. Illo reiciendis nulla ea. Facilis nostrum",
        "non qui inventore sit.",
    ]


def test_wc_wrap_text_with_wide_chars():
    lorem = (
        "☕☕☕☕☕ voluptas eos praesentium et 🎸🎸🎸🎸🎸. Quaerat nihil "
        "voluptatem excepturi reiciendis sapiente voluptate natus."
    )

    assert list(wc_wrap(lorem, 50)) == [
        #01234567890123456789012345678901234567890123456789 # noqa
        "☕☕☕☕☕ voluptas eos praesentium et 🎸🎸🎸🎸🎸.",
        "Quaerat nihil voluptatem excepturi reiciendis",
        "sapiente voluptate natus.",
    ]


def test_wc_wrap_hard_wrap():
    lorem = (
        "☕☕☕☕☕voluptaseospraesentiumet🎸🎸🎸🎸🎸.Quaeratnihil"
        "voluptatemexcepturireiciendissapientevoluptatenatus."
    )

    assert list(wc_wrap(lorem, 50)) == [
        #01234567890123456789012345678901234567890123456789 # noqa
        "☕☕☕☕☕voluptaseospraesentiumet🎸🎸🎸🎸🎸.Quaer",
        "atnihilvoluptatemexcepturireiciendissapientevolupt",
        "atenatus.",
    ]


def test_wc_wrap_indented():
    lorem = (
        "     Eius voluptas eos praesentium et tempore. Quaerat nihil voluptatem "
        "     excepturi reiciendis sapiente voluptate natus. Tenetur occaecati "
        "     velit dicta dolores. Illo reiciendis nulla ea. Facilis nostrum non "
        "     qui inventore sit."
    )

    assert list(wc_wrap(lorem, 50)) == [
        #01234567890123456789012345678901234567890123456789 # noqa
        "Eius voluptas eos praesentium et tempore. Quaerat",
        "nihil voluptatem excepturi reiciendis sapiente",
        "voluptate natus. Tenetur occaecati velit dicta",
        "dolores. Illo reiciendis nulla ea. Facilis nostrum",
        "non qui inventore sit.",
    ]