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import pytest, html5lib
from html5lib.serializer import HTMLSerializer
from html5lib.treewalkers import getTreeWalker

from .html import StripTagFilter, StripAttributeFilter

def test_strip_tag ():
    d = html5lib.parse ('<a>barbaz<b>foobar</b>.</a><b>foobar</b>.<b attr=1><c></c>')
    stream = StripTagFilter (getTreeWalker ('etree')(d), ['b', 'c'])
    serializer = HTMLSerializer ()
    assert serializer.render (stream) == '<a>barbaz.</a>.'

def test_strip_attribute ():
    d = html5lib.parse ('<a b=1 c="yes" d></a><br b=2 c="no" d keep=1>')
    stream = StripAttributeFilter (getTreeWalker ('etree')(d), ['b', 'c', 'd'])
    serializer = HTMLSerializer ()
    assert serializer.render (stream) == '<a></a><br keep=1>'