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import unittest, os | |
from crawl4ai.web_crawler import WebCrawler | |
from crawl4ai.chunking_strategy import RegexChunking, FixedLengthWordChunking, SlidingWindowChunking | |
from crawl4ai.extraction_strategy import CosineStrategy, LLMExtractionStrategy, TopicExtractionStrategy, NoExtractionStrategy | |
class TestWebCrawler(unittest.TestCase): | |
def setUp(self): | |
self.crawler = WebCrawler() | |
def test_warmup(self): | |
self.crawler.warmup() | |
self.assertTrue(self.crawler.ready, "WebCrawler failed to warm up") | |
def test_run_default_strategies(self): | |
result = self.crawler.run( | |
url='https://www.nbcnews.com/business', | |
word_count_threshold=5, | |
chunking_strategy=RegexChunking(), | |
extraction_strategy=CosineStrategy(), bypass_cache=True | |
) | |
self.assertTrue(result.success, "Failed to crawl and extract using default strategies") | |
def test_run_different_strategies(self): | |
url = 'https://www.nbcnews.com/business' | |
# Test with FixedLengthWordChunking and LLMExtractionStrategy | |
result = self.crawler.run( | |
url=url, | |
word_count_threshold=5, | |
chunking_strategy=FixedLengthWordChunking(chunk_size=100), | |
extraction_strategy=LLMExtractionStrategy(provider="openai/gpt-3.5-turbo", api_token=os.getenv('OPENAI_API_KEY')), bypass_cache=True | |
) | |
self.assertTrue(result.success, "Failed to crawl and extract with FixedLengthWordChunking and LLMExtractionStrategy") | |
# Test with SlidingWindowChunking and TopicExtractionStrategy | |
result = self.crawler.run( | |
url=url, | |
word_count_threshold=5, | |
chunking_strategy=SlidingWindowChunking(window_size=100, step=50), | |
extraction_strategy=TopicExtractionStrategy(num_keywords=5), bypass_cache=True | |
) | |
self.assertTrue(result.success, "Failed to crawl and extract with SlidingWindowChunking and TopicExtractionStrategy") | |
def test_invalid_url(self): | |
with self.assertRaises(Exception) as context: | |
self.crawler.run(url='invalid_url', bypass_cache=True) | |
self.assertIn("Invalid URL", str(context.exception)) | |
def test_unsupported_extraction_strategy(self): | |
with self.assertRaises(Exception) as context: | |
self.crawler.run(url='https://www.nbcnews.com/business', extraction_strategy="UnsupportedStrategy", bypass_cache=True) | |
self.assertIn("Unsupported extraction strategy", str(context.exception)) | |
def test_invalid_css_selector(self): | |
with self.assertRaises(ValueError) as context: | |
self.crawler.run(url='https://www.nbcnews.com/business', css_selector="invalid_selector", bypass_cache=True) | |
self.assertIn("Invalid CSS selector", str(context.exception)) | |
def test_crawl_with_cache_and_bypass_cache(self): | |
url = 'https://www.nbcnews.com/business' | |
# First crawl with cache enabled | |
result = self.crawler.run(url=url, bypass_cache=False) | |
self.assertTrue(result.success, "Failed to crawl and cache the result") | |
# Second crawl with bypass_cache=True | |
result = self.crawler.run(url=url, bypass_cache=True) | |
self.assertTrue(result.success, "Failed to bypass cache and fetch fresh data") | |
def test_fetch_multiple_pages(self): | |
urls = [ | |
'https://www.nbcnews.com/business', | |
'https://www.bbc.com/news' | |
] | |
results = [] | |
for url in urls: | |
result = self.crawler.run( | |
url=url, | |
word_count_threshold=5, | |
chunking_strategy=RegexChunking(), | |
extraction_strategy=CosineStrategy(), | |
bypass_cache=True | |
) | |
results.append(result) | |
self.assertEqual(len(results), 2, "Failed to crawl and extract multiple pages") | |
for result in results: | |
self.assertTrue(result.success, "Failed to crawl and extract a page in the list") | |
def test_run_fixed_length_word_chunking_and_no_extraction(self): | |
result = self.crawler.run( | |
url='https://www.nbcnews.com/business', | |
word_count_threshold=5, | |
chunking_strategy=FixedLengthWordChunking(chunk_size=100), | |
extraction_strategy=NoExtractionStrategy(), bypass_cache=True | |
) | |
self.assertTrue(result.success, "Failed to crawl and extract with FixedLengthWordChunking and NoExtractionStrategy") | |
def test_run_sliding_window_and_no_extraction(self): | |
result = self.crawler.run( | |
url='https://www.nbcnews.com/business', | |
word_count_threshold=5, | |
chunking_strategy=SlidingWindowChunking(window_size=100, step=50), | |
extraction_strategy=NoExtractionStrategy(), bypass_cache=True | |
) | |
self.assertTrue(result.success, "Failed to crawl and extract with SlidingWindowChunking and NoExtractionStrategy") | |
if __name__ == '__main__': | |
unittest.main() | |