client_test.py

import unittest
from client3 import getDataPoint,getRatio

class ClientTest(unittest.TestCase):
  def test_getDataPoint_calculatePrice(self):
    quotes = [
      {'top_ask': {'price': 121.2, 'size': 36}, 'timestamp': '2019-02-11 22:06:30.572453', 'top_bid': {'price': 120.48, 'size': 109}, 'id': '0.109974697771', 'stock': 'ABC'},
      {'top_ask': {'price': 121.68, 'size': 4}, 'timestamp': '2019-02-11 22:06:30.572453', 'top_bid': {'price': 117.87, 'size': 81}, 'id': '0.109974697771', 'stock': 'DEF'}
    ]
    """ ------------ Add the assertion below ------------ """
    for quote in quotes:
       self.assertEqual(getDataPoint(quote),(quote['stock'],quote['top_bid']['price'],quote['top_ask']['price'],(quote['top_bid']['price']+quote['top_ask']['price'])/2))

  def test_getDataPoint_calculatePriceBidGreaterThanAsk(self):
    quotes = [
      {'top_ask': {'price': 119.2, 'size': 36}, 'timestamp': '2019-02-11 22:06:30.572453', 'top_bid': {'price': 120.48, 'size': 109}, 'id': '0.109974697771', 'stock': 'ABC'},
      {'top_ask': {'price': 121.68, 'size': 4}, 'timestamp': '2019-02-11 22:06:30.572453', 'top_bid': {'price': 117.87, 'size': 81}, 'id': '0.109974697771', 'stock': 'DEF'}
    ]
    """ ------------ Add the assertion below ------------ """
    for quote in quotes:
      self.assertEqual(getDataPoint(quote),(quote['stock'],quote['top_bid']['price'],quote['top_ask']['price'],(quote['top_bid']['price']+quote['top_ask']['price'])/2))


  """ ------------ Add more unit tests ------------ """
  def test_getRatio_zeroDivision(self):
    price_a = 1
    price_b = 0
    self.assertRaises(ZeroDivisionError,getRatio,price_a,price_b)

  def test_getRatio(self):
    quotes = [
      {'top_ask': {'price': 119.2, 'size': 36}, 'timestamp': '2019-02-11 22:06:30.572453', 'top_bid': {'price': 120.48, 'size': 109}, 'id': '0.109974697771', 'stock': 'ABC'},
      {'top_ask': {'price': 121.68, 'size': 4}, 'timestamp': '2019-02-11 22:06:30.572453', 'top_bid': {'price': 117.87, 'size': 81}, 'id': '0.109974697771', 'stock': 'DEF'}
    ]
    for quote1 in quotes:
      for quote2 in quotes:
        _,_,_,price_a = getDataPoint(quote1)
        _,_,_,price_b = getDataPoint(quote2)
        if price_b != 0:
          self.assertAlmostEqual(getRatio(price_a,price_b),price_a/price_b)

if __name__ == '__main__':
    unittest.main()