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import unittest
from parsel import Selector
from itemloaders import ItemLoader
class SubselectorLoaderTest(unittest.TestCase):
selector = Selector(
text="""
<html>
<body>
<header>
<div id="id">marta</div>
<p>paragraph</p>
</header>
<footer class="footer">
<a href="http://www.scrapy.org">homepage</a>
<img src="/images/logo.png" width="244" height="65" alt="Scrapy">
</footer>
</body>
</html>
"""
)
def test_nested_xpath(self):
loader = ItemLoader(selector=self.selector)
nl = loader.nested_xpath("//header")
nl.add_xpath("name", "div/text()")
nl.add_css("name_div", "#id")
assert nl.selector
nl.add_value("name_value", nl.selector.xpath('div[@id = "id"]/text()').getall())
self.assertEqual(loader.get_output_value("name"), ["marta"])
self.assertEqual(
loader.get_output_value("name_div"), ['<div id="id">marta</div>']
)
self.assertEqual(loader.get_output_value("name_value"), ["marta"])
self.assertEqual(loader.get_output_value("name"), nl.get_output_value("name"))
self.assertEqual(
loader.get_output_value("name_div"), nl.get_output_value("name_div")
)
self.assertEqual(
loader.get_output_value("name_value"), nl.get_output_value("name_value")
)
def test_nested_css(self):
loader = ItemLoader(selector=self.selector)
nl = loader.nested_css("header")
nl.add_xpath("name", "div/text()")
nl.add_css("name_div", "#id")
assert nl.selector
nl.add_value("name_value", nl.selector.xpath('div[@id = "id"]/text()').getall())
self.assertEqual(loader.get_output_value("name"), ["marta"])
self.assertEqual(
loader.get_output_value("name_div"), ['<div id="id">marta</div>']
)
self.assertEqual(loader.get_output_value("name_value"), ["marta"])
self.assertEqual(loader.get_output_value("name"), nl.get_output_value("name"))
self.assertEqual(
loader.get_output_value("name_div"), nl.get_output_value("name_div")
)
self.assertEqual(
loader.get_output_value("name_value"), nl.get_output_value("name_value")
)
def test_nested_replace(self):
loader = ItemLoader(selector=self.selector)
nl1 = loader.nested_xpath("//footer")
nl2 = nl1.nested_xpath("a")
loader.add_xpath("url", "//footer/a/@href")
self.assertEqual(loader.get_output_value("url"), ["http://www.scrapy.org"])
nl1.replace_xpath("url", "img/@src")
self.assertEqual(loader.get_output_value("url"), ["/images/logo.png"])
nl2.replace_xpath("url", "@href")
self.assertEqual(loader.get_output_value("url"), ["http://www.scrapy.org"])
def test_nested_ordering(self):
loader = ItemLoader(selector=self.selector)
nl1 = loader.nested_xpath("//footer")
nl2 = nl1.nested_xpath("a")
nl1.add_xpath("url", "img/@src")
loader.add_xpath("url", "//footer/a/@href")
nl2.add_xpath("url", "text()")
loader.add_xpath("url", "//footer/a/@href")
self.assertEqual(
loader.get_output_value("url"),
[
"/images/logo.png",
"http://www.scrapy.org",
"homepage",
"http://www.scrapy.org",
],
)
def test_nested_load_item(self):
loader = ItemLoader(selector=self.selector)
nl1 = loader.nested_xpath("//footer")
nl2 = nl1.nested_xpath("img")
loader.add_xpath("name", "//header/div/text()")
nl1.add_xpath("url", "a/@href")
nl2.add_xpath("image", "@src")
item = loader.load_item()
assert item is loader.item
assert item is nl1.item
assert item is nl2.item
self.assertEqual(item["name"], ["marta"])
self.assertEqual(item["url"], ["http://www.scrapy.org"])
self.assertEqual(item["image"], ["/images/logo.png"])
def test_nested_empty_selector(self):
loader = ItemLoader(selector=self.selector)
nested_xpath = loader.nested_xpath("//bar")
assert isinstance(nested_xpath, ItemLoader)
nested_xpath.add_xpath("foo", "./foo")
nested_css = loader.nested_css("bar")
assert isinstance(nested_css, ItemLoader)
nested_css.add_css("foo", "foo")
|
