def test_get_classifier_returns_naive_bayes_classifier_with_corpora_when_corpora_exist(
self):
# mock the shuffle list method
classify.shuffle = mock.MagicMock()
# regenerate the command class being tested as we mocked an extra module above
self.command = classify.Command()
# create a dummy news item and corpus
news_item = NewsItem()
news_item.title = 'foo'
news_item.save()
corpus = Corpus()
corpus.news_item = news_item
corpus.positive = True
corpus.save()
# call the method being tested
classifier = self.command.get_classifier()
# shuffled the corpora
classify.shuffle.assert_called_once_with([('foo', 'pos')])
# a classifier with corpora was created
classify.NaiveBayesClassifier.assert_called_once_with([('foo', 'pos')])
# the method returned a non-empty result
self.assertTrue(classifier != None)
class RssFeedTestCase(TestCase):
rss_feed = None
news_item = None
def setUp(self):
self.news_item = NewsItem()
self.rss_feed = RssFeed()
def test_items_returns_empty_list_when_newsitem_does_not_exist(self):
items = self.rss_feed.items()
self.assertEquals([], list(items))
def test_items_returns_newsitems_when_positive_newsitem_exists(self):
self.news_item.score = 1
self.news_item.published = True
self.news_item.save()
items = self.rss_feed.items()
self.assertEquals(1, len(list(items)))
def test_items_returns_empty_list_when_no_positive_newsitem_exists(self):
self.news_item.score = 0
self.news_item.published = False
self.news_item.save()
items = self.rss_feed.items()
self.assertEquals([], list(items))
def test_item_title_returns_newsitem_title_when_set(self):
self.news_item.title = 'foo_title'
self.assertEquals('foo_title',
self.rss_feed.item_title(self.news_item))
def test_item_title_returns_empty_string_when_newsitem_title_not_set(self):
self.assertEquals('', self.rss_feed.item_title(self.news_item))
def test_item_description_returns_newsitem_description_when_set(self):
self.news_item.description = 'foo_description'
self.assertEquals('foo_description',
self.rss_feed.item_description(self.news_item))
def test_item_description_returns_empty_string_when_newsitem_description_not_set(
self):
self.assertEquals('', self.rss_feed.item_description(self.news_item))
def test_item_link_returns_newsitem_url_when_set(self):
self.news_item.url = 'https://www.google.com'
self.assertEquals('https://www.google.com',
self.rss_feed.item_link(self.news_item))
def test_item_link_returns_empty_string_when_newsitem_url_not_set(self):
self.assertEquals('', self.rss_feed.item_link(self.news_item))
def test_item_pubdate_returns_none_when_newsitem_added_at_not_set(self):
self.assertNotEquals(None, self.rss_feed.item_pubdate(self.news_item))
def test_item_pubdate_returns_newsitem_added_at_datetime_when_set(self):
self.news_item.url = timezone.now()
self.assertNotEquals(None, self.rss_feed.item_pubdate(self.news_item))
def test_get_classifier_uses_unique_corpora(self):
# mock the shuffle list method
classify.shuffle = mock.MagicMock()
# regenerate the command class being tested as we mocked an extra module above
self.command = classify.Command()
# create dummy news items and corpora with same title and classification
for index in range(1, 3):
news_item = NewsItem()
news_item.title = 'foo'
news_item.save()
corpus = Corpus()
corpus.news_item = news_item
corpus.positive = True
corpus.save()
# test that two corpora exist
corpora = Corpus.objects.all()
self.assertEquals(2, len(corpora))
# call the method being tested
classifier = self.command.get_classifier()
# shuffled the corpora with only one of the identical corpora
classify.shuffle.assert_called_once_with([('foo', 'pos')])
def test_changelist_view_returns_metrics_when_corpora_exist_and_query_is_on_the_added_at_date(
self):
news_item = NewsItem()
news_item.title = 'foo'
news_item.save()
corpus = Corpus()
corpus.news_item = news_item
corpus.positive = True
corpus.added_at = '2018-12-02 21:00:00+00:00'
corpus.save()
superuser = self.create_superuser('superuser')
request = self.mocked_authenticated_request(
'/admin/rss/corpusmetric/?added_at__month=12&added_at__year=2018',
superuser)
response = self.admin.changelist_view(request)
expected_metrics = [{'positive': True, 'total': 1}]
expected_metrics_total = {'total': 1}
self.assertEquals(expected_metrics,
response.context_data['corpus_metrics'])
self.assertEquals(expected_metrics_total,
response.context_data['corpus_metrics_total'])
def test_get_newsitem_title_returns_title_when_news_item_is_not_none(self):
news_item = NewsItem()
news_item.title = 'foo'
corpus = Corpus()
corpus.news_item = news_item
admin = CorpusAdmin(Corpus, AdminSite())
self.assertEquals('foo', admin.get_news_item_title(corpus))
def test_news_item_unpublish_unpublishes_newsitems_in_query_set(self):
news_items = NewsItem.objects.all()
self.assertEquals([], list(news_items))
news_item = NewsItem()
news_item.title = 'foo'
news_item.published = True
query_set = [news_item]
self.newsitem.news_item_unpublish(None, None, query_set)
news_items = NewsItem.objects.all()
self.assertEquals(1, len(news_items))
self.assertEquals(False, news_items[0].published)
def get_classifier(self):
self.logger.info('Training classifier...')
stopwords_blacklisted = self.get_stopwords()
stopwords_pattern = re.compile(r'\b(' +
r'|'.join(stopwords_blacklisted) +
r')\b\s*')
corpora_classified = list()
for corpus in Corpus.objects.filter(active=True):
title = stopwords_pattern.sub('', corpus.news_item.title)
corpora_classified.append((title, corpus.get_classification()))
for news_item in NewsItem.find_neutral():
title = stopwords_pattern.sub('', news_item.title)
corpora_classified.append((title, 'neu'))
corpora_classified = list(set(corpora_classified))
shuffle(corpora_classified)
classifier = NaiveBayesClassifier(corpora_classified)
self.logger.info('Dumping classifier.')
pickle.dump(classifier, open(settings.CLASSIFIER_DUMP_FILEPATH, 'wb'))
self.logger.info('Classifier dumped!')
return classifier
def handle(self, *args, **options):
news_items = NewsItem.find_negative(
settings.SENTIMENT_POLARITY_THRESHOLD)
if not news_items:
self.logger.info('No news items found.')
return
connection = pika.BlockingConnection(
pika.ConnectionParameters(host=settings.QUEUE_HOSTNAME))
channel = connection.channel()
channel.queue_declare(queue=settings.QUEUE_NAME_CLASSIFY, durable=True)
self.logger.info(
'Found %s negative news items that are going to be re-classified.',
len(news_items))
for news_item in news_items:
body = serializers.serialize('json', [news_item])
channel.basic_publish(exchange='',
routing_key=settings.QUEUE_NAME_CLASSIFY,
body=body,
properties=pika.BasicProperties(
delivery_mode=2,
headers={'x-is-self-train': True}))
self.logger.info('Successfully re-queued #%s "%s"!', news_item.id,
news_item.title)
def test_changelist_view_returns_metrics_when_positive_newsitem_and_negative_corpus_exist(self):
news_item = NewsItem()
news_item.title = 'foo'
news_item.score = 1
news_item.added_at = '2018-12-03 21:00:00+00:00'
news_item.save()
corpus = Corpus()
corpus.positive = False
corpus.news_item = news_item
corpus.save()
superuser = self.create_superuser('superuser')
request = self.mocked_authenticated_request('/admin/rss/newsitemmetric/', superuser)
response = self.admin.changelist_view(request)
self.assertEquals(1, response.context_data['news_items_count'])
self.assertEquals(0, response.context_data['news_items_unclassified'])
self.assertEquals(1, response.context_data['classification_initial']['positive'])
self.assertEquals(0, response.context_data['classification_initial']['negative'])
self.assertEquals(0, response.context_data['classification_supervised']['positive'])
self.assertEquals(1, response.context_data['classification_supervised']['negative'])
self.assertEquals(0, response.context_data['corpus_count']['positive'])
self.assertEquals(1, response.context_data['corpus_count']['negative'])
self.assertEquals([{'accuracy': 0, 'added_at': '2018-12-03'}], response.context_data['accuracy'])
def news(request):
template = loader.get_template('web/news.html')
news_items = NewsItem.find_positive(settings.SENTIMENT_POLARITY_THRESHOLD,
settings.WEB_NEWS_ITEMS_COUNT)
context = {'news_items': news_items}
return HttpResponse(template.render(context))
def test_get_classifier_uses_corpora_clean_of_stopwords(self):
# mock the shuffle list method
classify.shuffle = mock.MagicMock()
# regenerate the command class being tested as we mocked an extra module above
self.command = classify.Command()
# create dummy news item (having title that contains stopwords) and corpora
news_item = NewsItem()
news_item.title = 'when foo then bar'
news_item.save()
corpus = Corpus()
corpus.news_item = news_item
corpus.positive = True
corpus.save()
# call the method being tested
classifier = self.command.get_classifier()
# shuffled the corpora with only one of the identical corpora
classify.shuffle.assert_called_once_with([('foo bar', 'pos')])
def test_get_accuracy_total_returns_100_percent_when_no_corpora(self):
news_item = NewsItem()
news_item.score = 1
news_item.added_at = '2018-11-24 01:00:00+00:00'
news_item.save()
accuracy = self.newsitem_metric.get_accuracy_total(self.date_range)
self.assertEquals(100, accuracy)
def test_changelist_view_returns_positive_and_negative_metrics_when_positive_and_negative_corpora_exist(
self):
news_item = NewsItem()
news_item.title = 'foo'
news_item.save()
corpus = Corpus()
corpus.news_item = news_item
corpus.positive = True
corpus.save()
news_item = NewsItem()
news_item.title = 'bar'
news_item.save()
corpus = Corpus()
corpus.news_item = news_item
corpus.positive = False
corpus.save()
superuser = self.create_superuser('superuser')
request = self.mocked_authenticated_request('/admin/rss/corpusmetric/',
superuser)
response = self.admin.changelist_view(request)
expected_metrics = [{
'positive': True,
'total': 1
}, {
'positive': False,
'total': 1
}]
expected_metrics_total = {'total': 2}
self.assertEquals(expected_metrics,
response.context_data['corpus_metrics'])
self.assertEquals(expected_metrics_total,
response.context_data['corpus_metrics_total'])
def test_get_accuracy_returns_100_percent_when_no_corpora(self):
news_item = NewsItem()
news_item.score = 1
news_item.added_at = '2018-11-24 01:00:00+00:00'
news_item.save()
metrics = self.newsitem_metric.get_accuracy(self.date_range)
self.assertEquals(1, len(metrics))
self.assertEquals(100, metrics[0]['accuracy'])
self.assertEquals('2018-11-24', metrics[0]['added_at'])
def test_corpus_create_positive_creates_positive_corpora_and_enqueues_job_to_retrain_classifier_when_newsitems_in_query_set(
self):
news_item = NewsItem()
news_item.title = 'foo'
news_item.published = True
news_item.save()
query_set = [news_item]
self.newsitem.corpus_create_positive(None, None, query_set)
self.newsitem.enqueue_corpus_creation.assert_called_once()
corpora = Corpus.objects.all()
self.assertEquals(1, len(corpora))
self.assertEquals(True, corpora[0].positive)
def test_get_accuracy_total_returns_0_percent_when_only_not_accurate_newsitems_exist(
self):
news_item = NewsItem()
news_item.score = 1
news_item.added_at = '2018-11-24 01:00:00+00:00'
news_item.save()
corpus = Corpus()
corpus.news_item = news_item
corpus.positive = False
corpus.save()
accuracy = self.newsitem_metric.get_accuracy_total(self.date_range)
self.assertEquals(0.0, accuracy)
def setUp(self):
# retain the original imported packages
classify.serializers_real = classify.serializers
# mock the tread target methods
self.thread_classify = mock.MagicMock()
self.thread_train = mock.MagicMock()
classify.threading.Thread = mock.MagicMock(
side_effect=[self.thread_classify, self.thread_train])
# mock pika.BlockingConnection
self.connection = mock.MagicMock()
classify.pika.BlockingConnection = mock.MagicMock(
return_value=self.connection)
# mock pika.BlockingConnection.channel
self.channel = mock.MagicMock()
self.connection.channel = mock.MagicMock(return_value=self.channel)
# mock ConnectionParameters
classify.pika.ConnectionParameters = mock.MagicMock()
# mock the ORM connection
self.db_connection = mock.MagicMock()
classify.connection = self.db_connection
# mock the classifier
classify.NaiveBayesClassifier = mock.MagicMock()
classify.settings.AUTO_PUBLISH = False
# a fake news item to be used as classification input
news_item = NewsItem()
news_item.title = 'foo'
self.serialized_news_item = serializers.serialize('json', [news_item])
news_item = NewsItem()
news_item.title = 'foo'
news_item.published = 'foo'
self.serialized_news_item_crap = serializers.serialize(
'json', [news_item])
# mock the logger
self.logger = mock.MagicMock()
classify.logging.getLogger = mock.MagicMock(return_value=self.logger)
self.command = classify.Command()
def test_news_item_publish_and_corpus_create_negative_publishes_newsitems_and_creates_negative_corpora_when_newsitems_in_query_set(
self):
news_item = NewsItem()
news_item.title = 'foo'
news_item.publshed = True
news_item.score = 1.00
news_item.save()
query_set = [news_item]
self.newsitem.news_item_unpublish_and_corpus_create_negative(
None, None, query_set)
self.newsitem.enqueue_corpus_creation.assert_called_once()
news_items = NewsItem.objects.all()
self.assertEquals(1, len(news_items))
self.assertFalse(news_items[0].published)
corpus = Corpus.objects.filter(news_item=news_items[0])
self.assertNotEquals(None, corpus)
self.assertFalse(corpus[0].positive)
def test_get_accuracy_returns_0_percent_when_only_not_accurate_newsitems_exist(
self):
news_item = NewsItem()
news_item.score = 1
news_item.added_at = '2018-11-24 01:00:00+00:00'
news_item.save()
corpus = Corpus()
corpus.news_item = news_item
corpus.positive = False
corpus.save()
metrics = self.newsitem_metric.get_accuracy(self.date_range)
self.assertEquals(1, len(metrics))
self.assertEquals(0, metrics[0]['accuracy'])
self.assertEquals('2018-11-24', metrics[0]['added_at'])
def test_news_returns_http_response_with_template_and_positive_newsitems_when_positive_newsitems_exist(self):
# create a positive news item
news_item = NewsItem()
news_item.title = 'foo'
news_item.score = 1
news_item.published = True
news_item.save()
# make request to news view
response = self.get_news()
# returns an instance of HttpResponse
self.assertTrue(type(response) is HttpResponse)
# request didn't fail
self.assertEquals(200, response.status_code)
# response contains news items
content = response.getvalue()
self.assertTrue('news-item' in str(content))
def test_changelist_view_returns_metrics_when_newsitems_exist_but_no_corpora_and_date_query_includes_newsitem(self):
news_item = NewsItem()
news_item.title = 'foo'
news_item.score = 1
news_item.added_at = '2018-12-03 21:00:00+00:00'
news_item.save()
superuser = self.create_superuser('superuser')
request = self.mocked_authenticated_request('/admin/rss/newsitemmetric/?added_at__month=12&added_at__year=2018', superuser)
response = self.admin.changelist_view(request)
self.assertEquals(1, response.context_data['news_items_count'])
self.assertEquals(0, response.context_data['news_items_unclassified'])
self.assertEquals(1, response.context_data['classification_initial']['positive'])
self.assertEquals(0, response.context_data['classification_initial']['negative'])
self.assertEquals(1, response.context_data['classification_supervised']['positive'])
self.assertEquals(0, response.context_data['classification_supervised']['negative'])
self.assertEquals(0, response.context_data['corpus_count']['positive'])
self.assertEquals(0, response.context_data['corpus_count']['negative'])
self.assertEquals([{'accuracy': 100.0, 'added_at': '2018-12-03'}], response.context_data['accuracy'])
def test_news_item_publish_and_corpus_create_positive_publishes_newsitems_and_creates_positive_corpora_when_newsitems_in_query_set(
self):
news_item = NewsItem()
news_item.title = 'foo'
news_item.published = False
news_item.save()
query_set = [news_item]
self.newsitem.news_item_publish_and_corpus_create_positive(
None, None, query_set)
self.newsitem.enqueue_corpus_creation.assert_called_once()
corpora = Corpus.objects.all()
self.assertEquals(1, len(corpora))
self.assertEquals(True, corpora[0].positive)
news_items = NewsItem.objects.all()
self.assertEquals(1, len(news_items))
self.assertEquals(True, news_items[0].published)
def test_about_returns_http_response_with_stats(self):
# create a news item
news_item = NewsItem()
news_item.title = 'foo'
news_item.score = 1
news_item.published = False
news_item.save()
# create an active source
source = Source()
source.name = 'foo'
source.url = 'http://www.foo.com'
source.homepage = 'http://www.foo.com'
source.save()
# create an inactive source
source = Source()
source.name = 'bar'
source.url = 'http://www.bar.com'
source.homepage = 'http://www.bar.com'
source.active = False
source.save()
# make request to news view
response = self.get_about()
# returns an instance of HttpResponse
self.assertTrue(type(response) is HttpResponse)
# request didn't fail
self.assertEquals(200, response.status_code)
# response does not contain any news items
content = response.getvalue()
self.assertTrue('Sources crawled</strong>: 1' in str(content))
self.assertTrue('News classified</strong>: 1' in str(content))
self.assertTrue('Corpora created</strong>: 0' in str(content))
self.assertTrue('Classification accuracy</strong>: 100%' in str(content))
def test_handle_publishes_when_newsitems_exist(self):
news_item = NewsItem()
news_item.id = 1
news_item.title = 'foo'
news_item.save()
# the method being tested
self.command.handle()
classify_requeue.pika.BlockingConnection.assert_called_once()
classify_requeue.pika.ConnectionParameters.assert_called_once()
self.connection.channel.assert_called_once()
self.channel.queue_declare.assert_called_once_with(
queue=settings.QUEUE_NAME_CLASSIFY, durable=True)
self.channel.basic_publish.assert_called_once()
self.logger.info.assert_any_call(
'Found %s news items that need to be classified.', 1)
self.logger.info.assert_any_call('Successfully re-queued #%s "%s"!', 1,
'foo')
def test_to_dict_returns_dictionaries_when_cursor_more_than_one_results(
self):
news_item = NewsItem()
news_item.score = 1
news_item.added_at = '2018-11-23 01:00:00+00:00'
news_item.save()
news_item = NewsItem()
news_item.score = 1
news_item.added_at = '2018-11-23 02:00:00+00:00'
news_item.save()
with connection.cursor() as cursor:
cursor.execute('SELECT * FROM news_item')
results = self.newsitem_metric.to_dict(cursor)
self.assertEquals(2, len(results))
self.assertEquals(dict, type(results[0]))
self.assertEquals(dict, type(results[1]))
def setUp(self):
news_item = NewsItem()
self.corpus = Corpus()
self.corpus.news_item = news_item
def test_to_dict_returns_one_dictionary_when_cursor_has_one_result(self):
source = Source()
source.id = 1
source.name = 'foo_source'
source.save()
news_item = NewsItem()
news_item.id = 1
news_item.title = 'foo'
news_item.description = 'bar'
news_item.url = 'https://www.google.com'
news_item.added_at = '2018-11-23 01:00:00+00:00'
news_item.source = source
news_item.published = False
news_item.score = 1
news_item.save()
with connection.cursor() as cursor:
cursor.execute('SELECT * FROM news_item')
result = self.newsitem_metric.to_dict(cursor)
self.assertEquals(1, len(result))
self.assertEquals([{
'id': 1,
'title': 'foo',
'description': 'bar',
'url': 'https://www.google.com',
'added_at': datetime(2018, 11, 23, 1, 0),
'source_id': 1,
'published': False,
'score': 1
}], result)
def test_get_accuracy_does_not_include_unclassified_newsitems(self):
news_item = NewsItem()
news_item.score = None
news_item.added_at = '2018-11-24 01:00:00+00:00'
news_item.save()
news_item = NewsItem()
news_item.score = None
news_item.published = True
news_item.added_at = '2018-11-24 02:00:00+00:00'
news_item.save()
metrics = self.newsitem_metric.get_accuracy(self.date_range)
self.assertEquals([], metrics)
def test_get_accuracy_total_uses_two_day_statistics_when_exist(self):
news_item = NewsItem()
news_item.score = 1
news_item.added_at = '2018-11-24 01:00:00+00:00'
news_item.save()
corpus = Corpus()
corpus.news_item = news_item
corpus.positive = False
corpus.save()
news_item = NewsItem()
news_item.score = 1
news_item.added_at = '2018-11-25 01:00:00+00:00'
news_item.save()
accuracy = self.newsitem_metric.get_accuracy_total(self.date_range)
self.assertEquals(50.0, accuracy)
def setUp(self):
self.news_item = NewsItem()
self.rss_feed = RssFeed()
