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#
# Pyserini: Reproducible IR research with sparse and dense representations
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#

import os
import shutil
import tarfile
import unittest
from random import randint
from urllib.request import urlretrieve

from pyserini import collection, index


class TestIterateCollection(unittest.TestCase):

    def test_cacm(self):
        # We're going to append a random value to downloaded files:
        r = randint(0, 10000000)
        url = 'https://github.com/castorini/anserini/blob/master/src/main/resources/cacm/cacm.tar.gz?raw=true'
        tarball_name = 'cacm{}.tar.gz'.format(r)
        directory = 'collection{}/'.format(r)

        _, _ = urlretrieve(url, tarball_name)

        tarball = tarfile.open(tarball_name)
        tarball.extractall(directory)
        tarball.close()

        cacm = collection.Collection('HtmlCollection', directory)
        generator = index.Generator('DefaultLuceneDocumentGenerator')

        cnt = 0
        for (i, fs) in enumerate(cacm):
            for (j, doc) in enumerate(fs):
                self.assertTrue(isinstance(doc, collection.SourceDocument))
                self.assertTrue(doc.raw is not None)
                self.assertTrue(doc.raw != '')
                self.assertTrue('<html>' in doc.raw)
                self.assertTrue(doc.contents is not None)
                self.assertTrue(doc.contents != '')
                self.assertTrue('<html>' not in doc.contents)

                parsed = generator.create_document(doc)
                docid = parsed.get('id')            # FIELD_ID
                raw = parsed.get('raw')             # FIELD_RAW
                contents = parsed.get('contents')   # FIELD_BODY
                self.assertTrue(docid != '')
                self.assertTrue(raw is not None)
                self.assertTrue(raw != '')
                self.assertTrue('html' in raw)
                self.assertTrue(contents is not None)
                self.assertTrue(contents != '')
                self.assertTrue('html' not in contents)
                cnt += 1

        self.assertEqual(cnt, 3204)

        # Clean up
        os.remove(tarball_name)
        shutil.rmtree(directory)


if __name__ == '__main__':
    unittest.main()