def test_css_write_string():
css_string = 'test styles'
css = ps.Css(css_string=css_string, name='test name')
output = css.write()
output_string = output.__str__()
assert output_string.startswith('<style type="text/css"')
assert output_string.endswith('</style>')
assert css_string in output_string
def test_register_interactive_write_interactive():
test_css = ps.Css(css_string='test styles', name='test name')
ps.register_interactive(test_css)
stream = StringIO()
ps.write_interactive(stream)
assert 'test styles' in stream.getvalue()
# Add once more, should not be in final output more than once
ps.register_interactive(test_css)
stream = StringIO()
ps.write_interactive(stream)
assert stream.getvalue().count('test styles') == 1
def test_css_raises_with_no_name_and_string():
with pytest.raises(ValueError):
ps.Css()
