def test__render_data_highlight(self):
item_name = u'Text_Item'
item = Text.create(item_name)
contenttype = u'text/plain'
meta = {CONTENTTYPE: contenttype}
item._save(meta)
item1 = Text.create(item_name)
data = 'test_data\nnext line'
comment = u'next revision'
item1._save(meta, data, comment=comment)
item2 = Text.create(item_name)
result = Text._render_data_highlight(item2)
assert u'<pre class="highlight">test_data\n' in result
assert item2.data == ''
