text: from stock_indicators import indicators
  
  class TestHTTrendline:
      def test_standard(self, quotes):
          results = indicators.get_ht_trendline(quotes)
          
          assert 502 == len(results)
          assert 502 == len(list(filter(lambda x: x.trendline is not None, results)))
          assert 496 == len(list(filter(lambda x: x.smooth_price is not None, results)))
          
          r = results[5]
          assert 214.205 == round(float(r.trendline), 3)
          assert r.smooth_price is None
          
          r = results[6]
          assert  213.84 == round(float(r.trendline), 2)
          assert 214.071 == round(float(r.smooth_price), 3)
          
          r = results[11]
          assert 213.9502 == round(float(r.trendline), 4)
          assert 213.8460 == round(float(r.smooth_price), 4)
          
          r = results[25]
          assert 215.3948 == round(float(r.trendline), 4)
          assert 216.3365 == round(float(r.smooth_price), 4)
          
          r = results[149]
          assert 233.9410 == round(float(r.trendline), 4)
          assert 235.8570 == round(float(r.smooth_price), 4)
          
          r = results[249]
          assert 253.8788 == round(float(r.trendline), 4)
          assert 257.5825 == round(float(r.smooth_price), 4)
          
          r = results[501]
          assert 252.2172 == round(float(r.trendline), 4)
          assert 242.3435 == round(float(r.smooth_price), 4)
          
      def test_bad_data(self, bad_quotes):
          r = indicators.get_ht_trendline(bad_quotes)
          assert 502 == len(r)
      
      def test_removed(self, quotes):
          results = indicators.get_ht_trendline(quotes).remove_warmup_periods()
          
          assert 502 - 100 == len(results)
          
          last = results.pop()
          assert 252.2172 == round(float(last.trendline), 4)
          assert 242.3435 == round(float(last.smooth_price), 4)
          
      def test_penny_data(self, penny_quotes):
          results = indicators.get_ht_trendline(penny_quotes)
          assert 533 == len(results)
          
      def test_no_quotes(self, quotes):
          r = indicators.get_ht_trendline([])
          assert 0 == len(r)
          
          r = indicators.get_ht_trendline(quotes[:1])
          assert 1 == len(r)
  