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import pytest
from rich.style import Style
from textual.color import Color
from textual.css.errors import StyleValueError
from textual.css.styles import Styles
def test_box_normalization():
"""Check that none or hidden is normalized to empty string."""
styles = Styles()
styles.border_left = ("none", "red")
assert styles.border_left == ("", Color.parse("red"))
@pytest.mark.parametrize("style_attr", ["text_style", "link_style"])
def test_text_style_none_with_others(style_attr):
"""Style "none" mixed with others should give custom Textual exception."""
styles = Styles()
with pytest.raises(StyleValueError):
setattr(styles, style_attr, "bold none underline italic")
@pytest.mark.parametrize("style_attr", ["text_style", "link_style"])
def test_text_style_set_to_none(style_attr):
"""Setting text style to "none" should clear the styles."""
styles = Styles()
setattr(styles, style_attr, "bold underline italic")
assert getattr(styles, style_attr) != Style.null()
setattr(styles, style_attr, "none")
assert getattr(styles, style_attr) == Style.null()
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