new_contents: import unittest
  from zaifbot.exchange import Tick, CurrencyPair
  
  
  class TestTick(unittest.TestCase):
      def setUp(self):
          self._btc_jpy = CurrencyPair('btc_jpy')
          self._xem_jpy = CurrencyPair('xem_jpy')
          self._xem_btc = CurrencyPair('xem_btc')
          self._zaif_jpy = CurrencyPair('zaif_jpy')
          self._zaif_btc = CurrencyPair('zaif_btc')
  
      def test_btc_jpy(self):
          tick = Tick(self._btc_jpy)
          case1 = tick.truncate_price(100)
          case2 = tick.truncate_price(3)
          case3 = tick.truncate_price(5)
          case4 = tick.truncate_price(5.0)
          case5 = tick.truncate_price(123.45678)
  
          cases = (case1, case2, case3, case4, case5)
          expected_values = (100, 0, 5, 5, 120)
          self.assertEqual(cases, expected_values)
  
      def test_xem_jpy(self):
          tick = Tick(self._xem_jpy)
          case1 = tick.truncate_price(0.1)
          case2 = tick.truncate_price(1)
          case3 = tick.truncate_price(1.0)
          case4 = tick.truncate_price(0.000001)
          case5 = tick.truncate_price(0.12345)
  
          cases = (case1, case2, case3, case4, case5)
          expected_values = (0.1, 1.0, 1.0, 0.0, 0.1234)
          self.assertEqual(cases, expected_values)
  
      def test_zaif_jpy(self):
          tick = Tick(self._zaif_jpy)
          case1 = tick.truncate_price(0.1)
          case2 = tick.truncate_price(1)
          case3 = tick.truncate_price(1.0)
          case4 = tick.truncate_price(0.000001)
          case5 = tick.truncate_price(0.123456)
  
          cases = (case1, case2, case3, case4, case5)
          expected_values = (0.1, 1.0, 1.0, 0.0, 0.1234)
          self.assertEqual(cases, expected_values)
  
      def test_xem_btc(self):
          tick = Tick(self._xem_btc)
          case1 = tick.truncate_price(0.00000001)
          case2 = tick.truncate_price(0.00000001234)
          case3 = tick.truncate_price(0.00000341)
          case4 = tick.truncate_price(1)
  
          cases = (case1, case2, case3, case4)
          expected_values = (0.00000001, 0.00000001, 0.00000341, 1.0)
          self.assertEqual(cases, expected_values)
  
      def test_zaif_btc(self):
          tick = Tick(self._zaif_btc)
          case1 = tick.truncate_price(0.00000001)
          case2 = tick.truncate_price(0.00000001234)
          case3 = tick.truncate_price(0.00000341)
          case4 = tick.truncate_price(1)
  
          cases = (case1, case2, case3, case4)
          expected_values = (0.00000001, 0.00000001, 0.00000341, 1.0)
          self.assertEqual(cases, expected_values)
  
  if __name__ == '__main__':
      unittest.main()
  
subject: Add tick test