def setUp(self):
request = self.layer['request']
request.response.setHeader('Content-Type', 'text/html')
self.transformer = LazySizesTransform(None, request)
def setUp(self):
request = self.layer['request']
self.transformer = LazySizesTransform(None, request)
class TransformerTestCase(unittest.TestCase):
layer = INTEGRATION_TESTING
def setUp(self):
request = self.layer['request']
request.response.setHeader('Content-Type', 'text/html')
self.transformer = LazySizesTransform(None, request)
def test_transformer_anonymous_user(self):
logout()
url = 'http://example.com/foo.png'
html = HTML.format(url=url, klass='')
result = self.transformer.transformIterable(html, 'utf-8')
img = result.tree.xpath('//img')[0]
self.assertEqual(img.attrib['src'], PLACEHOLDER)
self.assertEqual(img.attrib['class'], 'lazyload')
self.assertIn(img.attrib['data-src'], url)
def test_transformer_authenticated_user_disabled(self):
url = 'http://example.com/foo.png'
html = HTML.format(url=url, klass='')
result = self.transformer.transformIterable(html, 'utf-8')
self.assertIsNone(result)
def test_transformer_authenticated_user_enabled(self):
record = ILazySizesSettings.__identifier__ + '.lazyload_authenticated'
api.portal.set_registry_record(record, True)
url = 'http://example.com/foo.png'
html = HTML.format(url=url, klass='')
result = self.transformer.transformIterable(html, 'utf-8')
img = result.tree.xpath('//img')[0]
self.assertEqual(img.attrib['src'], PLACEHOLDER)
self.assertEqual(img.attrib['class'], 'lazyload')
self.assertIn(img.attrib['data-src'], url)
def test_lazyload_img(self):
url = 'http://example.com/foo.png'
img_tag = '<img src="{0}" />'.format(url)
element = lxml.html.fromstring(img_tag)
# the transformer returns the URL of the referenced image
self.assertEqual(self.transformer._lazyload_img(element), url)
# the src attribute is the placeholder
self.assertIn('src', element.attrib)
self.assertTrue(element.attrib['src'].startswith('data:image/png'))
# the data-src attribute is the original image
self.assertIn('data-src', element.attrib)
self.assertEqual(element.attrib['data-src'], url)
@log_capture(level=logging.ERROR)
def test_lazyload_img_no_src(self, l):
element = lxml.html.fromstring('<img />')
# the transformer returns None (skip element)
self.assertIsNone(self.transformer._lazyload_img(element))
# an error message must be logged
msg = '<img> tag without src attribute in: http://nohost'
expected = ('collective.lazysizes', 'ERROR', msg)
l.check(expected)
def test_lazyload_iframe(self):
url = 'http://example.com/foo/bar'
iframe_tag = '<iframe src="{0}" />'.format(url)
element = lxml.html.fromstring(iframe_tag)
# the transformer returns the URL of the referenced page
self.assertEqual(self.transformer._lazyload_iframe(element), url)
# the src attribute was removed
self.assertNotIn('src', element.attrib)
# the data-src attribute is the original page
self.assertIn('data-src', element.attrib)
self.assertEqual(element.attrib['data-src'], url)
def test_lazyload_iframe_no_src(self):
element = lxml.html.fromstring('<iframe />')
# the transformer returns None (skip element)
self.assertIsNone(self.transformer._lazyload_iframe(element))
def test_lazyload_tweet(self):
url = 'https://twitter.com/verge/status/725096763972001794'
# get the blockquote tag only
html = lxml.html.fromstring(TWEET)
element = html.getchildren()[0]
# the transformer returns the URL of the referenced tweet
self.assertEqual(self.transformer._lazyload_tweet(element), url)
# the data-twitter attribute was added
self.assertIn('data-twitter', element.attrib)
# the script tag was removed
self.assertEqual(len(html.getchildren()), 1)
def test_lazyload_tweet_modified(self):
# get the blockquote tag only
html = lxml.html.fromstring(TWEET_MODIFIED)
element = html.getchildren()[0]
# the transformer returns None (skip element)
self.assertIsNone(self.transformer._lazyload_tweet(element))
def test_lazyload_tweet_no_script(self):
# get the blockquote tag only
element = lxml.html.fromstring(TWEET_NO_SCRIPT)
# the transformer returns None (skip element)
self.assertIsNone(self.transformer._lazyload_tweet(element))
@staticmethod
def set_css_class_blacklist(value):
registry = getUtility(IRegistry)
settings = registry.forInterface(ILazySizesSettings)
settings.css_class_blacklist = value
def test_css_blacklisted_class(self):
self.set_css_class_blacklist({'nolazyload'})
logout() # enable transform
# Case 1: Do not transform Blacklisted - single class
url = 'http://example.com/foo.png'
klass = 'nolazyload'
html = HTML.format(url=url, klass=klass)
result = self.transformer.transformIterable(html, 'utf-8')
img = result.tree.xpath('//img')[0]
self.assertEqual(img.attrib['src'], url)
self.assertEqual(img.attrib['class'], klass)
self.assertNotIn('data-src', img.attrib)
def test_css_blacklisted_multiple_classes(self):
self.set_css_class_blacklist({'nolazyload'})
logout() # enable transform
# Case 2: Do not transform Blacklisted - multiple classes
url = 'http://example.com/foo.png'
klass = 'nolazyload secondclass thirdclass'
html = HTML.format(url=url, klass=klass)
result = self.transformer.transformIterable(html, 'utf-8')
img = result.tree.xpath('//img')[0]
self.assertEqual(img.attrib['src'], url)
self.assertEqual(img.attrib['class'], klass)
self.assertNotIn('data-src', img.attrib)
def test_css_blacklisted_false_possitives(self):
self.set_css_class_blacklist({'nolazyload'})
logout() # enable transform
# Case 3: Do not blacklist classes which contain the classname
url = 'http://example.com/foo.png'
klass = 'nolazyloadbutnot anothernolazyloadbutnot'
html = HTML.format(url=url, klass=klass)
result = self.transformer.transformIterable(html, 'utf-8')
img = result.tree.xpath('//img')[0]
self.assertEqual(img.attrib['src'], PLACEHOLDER)
self.assertIn(klass, img.attrib['class'])
self.assertIn('lazyload', img.attrib['class'])
self.assertEqual(img.attrib['data-src'], url)
class TransformerTestCase(unittest.TestCase):
layer = INTEGRATION_TESTING
def setUp(self):
request = self.layer['request']
self.transformer = LazySizesTransform(None, request)
def test_lazyload_img(self):
url = 'http://example.com/foo.png'
img_tag = '<img src="{0}" />'.format(url)
element = lxml.html.fromstring(img_tag)
# the transformer returns the URL of the referenced image
self.assertEqual(self.transformer._lazyload_img(element), url)
# the src attribute is the placeholder
self.assertIn('src', element.attrib)
self.assertTrue(element.attrib['src'].startswith('data:image/png'))
# the data-src attribute is the original image
self.assertIn('data-src', element.attrib)
self.assertEqual(element.attrib['data-src'], url)
def test_lazyload_img_no_src(self):
element = lxml.html.fromstring('<img />')
# the transformer returns None (skip element)
self.assertIsNone(self.transformer._lazyload_img(element))
def test_lazyload_iframe(self):
url = 'http://example.com/foo/bar'
iframe_tag = '<iframe src="{0}" />'.format(url)
element = lxml.html.fromstring(iframe_tag)
# the transformer returns the URL of the referenced page
self.assertEqual(self.transformer._lazyload_iframe(element), url)
# the src attribute was removed
self.assertNotIn('src', element.attrib)
# the data-src attribute is the original page
self.assertIn('data-src', element.attrib)
self.assertEqual(element.attrib['data-src'], url)
def test_lazyload_iframe_no_src(self):
element = lxml.html.fromstring('<iframe />')
# the transformer returns None (skip element)
self.assertIsNone(self.transformer._lazyload_iframe(element))
def test_lazyload_tweet(self):
url = 'https://twitter.com/verge/status/725096763972001794'
# get the blockquote tag only
html = lxml.html.fromstring(TWEET)
element = html.getchildren()[0]
# the transformer returns the URL of the referenced tweet
self.assertEqual(self.transformer._lazyload_tweet(element), url)
# the data-twitter attribute was added
self.assertIn('data-twitter', element.attrib)
# the script tag was removed
self.assertEqual(len(html.getchildren()), 1)
def test_lazyload_tweet_modified(self):
# get the blockquote tag only
html = lxml.html.fromstring(TWEET_MODIFIED)
element = html.getchildren()[0]
# the transformer returns None (skip element)
self.assertIsNone(self.transformer._lazyload_tweet(element))
def test_lazyload_tweet_no_script(self):
# get the blockquote tag only
element = lxml.html.fromstring(TWEET_NO_SCRIPT)
# the transformer returns None (skip element)
self.assertIsNone(self.transformer._lazyload_tweet(element))
