def test__render_data_diff(self): item_name = u'Html_Item' empty_html = u'<span></span>' html = u'<span>\ud55c</span>' meta = {CONTENTTYPE: u'text/html;charset=utf-8'} item = Text.create(item_name) item._save(meta, empty_html) item = Text.create(item_name) # Unicode test, html escaping rev1 = update_item(item_name, meta, html) rev2 = update_item(item_name, {}, u' ') result = Text._render_data_diff(item, rev1, rev2) assert escape(html) in result # Unicode test, whitespace rev1 = update_item(item_name, {}, u'\n\n') rev2 = update_item(item_name, {}, u'\n \n') result = Text._render_data_diff(item, rev1, rev2) assert '<span> </span>' in result # If fairly similar diffs are correctly spanned or not, also check indent rev1 = update_item(item_name, {}, u'One Two Three Four\nSix\n\ud55c') rev2 = update_item(item_name, {}, u'Two Three Seven Four\nSix\n\ud55c') result = Text._render_data_diff(item, rev1, rev2) assert '<span>One </span>Two Three Four' in result assert 'Two Three <span>Seven </span>Four' in result # Check for diff_html.diff return types assert reduce(lambda x, y: x and y, [isinstance(i[1], unicode) and isinstance(i[3], unicode) for i in diff_html.diff(u'One Two Three Four\nSix\n', u'Two Three Seven Four\nSix Seven\n')], True)