def test_outgoing_links_to_pagerank_format(self):
"""
Test the mechanism for converting a dictionary of urls and their
outgoing links to a dictionary of urls, their incoming links, and
the number of links on each incoming links' page.
"""
dictionary_of_outgoing_links = {'site1':[ 'site2', 'site3'],
'site2':[ 'site3'],
'site3':['site1', 'site2' ]}
expected_output = {'site1':{'incoming links':[ 'site3'], 'number of outgoing links': 2, 'pagerank': 1},
'site2':{'incoming links':['site3', 'site1' ], 'number of outgoing links': 1, 'pagerank': 1},
'site3':{'incoming links':['site2', 'site1' ], 'number of outgoing links': 2, 'pagerank': 1}}
self.assertEqual(spider.outgoing_links_to_pagerank(dictionary_of_outgoing_links), expected_output), "Conversion from outgoing link format to incoming link format failed."
def test_pagerank_with_an_unscanned_site(self):
"""
Test the results coming out of the pagerank algorithm.
To deal with unscanned but referenced webpages the
program adds an entry and assumes 1 incoming link.
The two inputs below should have identical output.
"""
input3 = {'site1':[ 'site2', 'site3', 'site4'],
'site2':[ 'site3', 'site4'],
'site3':['site1', 'site2' ]}
input4 = {'site1':[ 'site2', 'site3', 'site4'],
'site2':[ 'site3', 'site4'],
'site3':['site1', 'site2' ],
'site4':[ ],
'site5':[ ]}
a_random_number = randint(0,10)
self.assertEqual(spider.page_rank(spider.outgoing_links_to_pagerank(input3), a_random_number), spider.page_rank(spider.outgoing_links_to_pagerank(input4), a_random_number)), "Unscanned site pagerank is incorrect"
