Add pytests for pipeline

class TestPuppeteerCrawler(TestCase):

    crawler_address = "http://0.0.0.0:8080"

    block = Puppeteer(crawler_address)

    block.config(1200, 1200, REQUIRED_STYLES)

    url = "https://www.example.com"

    htmlp: HTMLP = block(url=url, page_width=1200, page_height=1200, styles=REQUIRED_STYLES)

    htmlp: HTMLP = block(url=url)

    def test_is_running(self):

        assert self.block.requester.is_running