Let us take a look at the tests that we have done so far:
def test_price_of_a_new_stock_class_should_be_None(self):
stock = Stock("GOOG")
self.assertIsNone(stock.price)
def test_stock_update(self):
"""An update should set the price on the stock object
We will be using the `datetime` module for the timestamp
"""
goog = Stock("GOOG")
goog.update(datetime(2014, 2, 12), price=10)
self.assertEqual(10, goog.price)
def test_negative_price_should_throw_ValueError(self):
goog = Stock("GOOG")
with self.assertRaises(ValueError):
goog.update(datetime(2014, 2, 13), -1)
def test_stock_price_should_give_the_latest_price(self):
goog = Stock("GOOG")
goog.update(datetime(2014, 2, 12), price=10)
goog.update(datetime(2014, 2, 13), price=8.4)
self.assertAlmostEqual(8.4, goog.price, delta=0.0001)If you notice, each test does the same setup by instantiating...