class Shop(object):
def __init__(self, name):
self.name = name
self.stock = Stock()
def add_stock(self, item, quantity):
self.stock.update_stock(item, quantity)
def test_get_all_stocks(self):
th = TradeHandler()
stock1 = Stock('ABC', 10, 100)
stock2 = Stock('ABD', 10, 100)
stock3 = Stock('ABC', 10, 100, is_preferred=True, fixed_dividend=3)
th.buy_stock(stock2, 2, 10)
th.buy_stock(stock2, 2, 10)
th.buy_stock(stock3, 4, 2)
self.assertEquals(th.get_all_stocks(), {stock2, stock3})
def test_get_all_share_index(self):
th = TradeHandler()
stock1 = Stock('ABC', 10, 100)
stock2 = Stock('ABD', 10, 100)
th.buy_stock(stock1, 10, 10)
th.buy_stock(stock1, 10, 10)
th.buy_stock(stock2, 10, 10)
self.assertAlmostEqual(10, get_all_share_index(th))
th.buy_stock(stock2, 50, 1)
self.assertAlmostEqual(5, get_all_share_index(th))
def test_get_all_share_index_based_on_last_price(self):
th = TradeHandler()
stock1 = Stock('ABC', 10, 100)
stock2 = Stock('ABD', 10, 100)
stock3 = Stock('ABE', 10, 100)
th.buy_stock(stock1, 1, 9)
th.buy_stock(stock1, 10, 10)
th.buy_stock(stock2, 64, 4)
th.buy_stock(stock2, 50, 10)
th.buy_stock(stock3, 1, 346)
th.buy_stock(stock3, 1, 10)
self.assertAlmostEqual(10, get_all_share_index_based_on_last_price(th))
class TestStock(unittest.TestCase):
def setUp(self):
self.stock = Stock()
def test_stock_adds_new_stock_items(self):
item = StockItem('Fresh Diary Milk', 1000)
self.stock.update_stock(item, 20)
self.assertEqual(
self.stock.stock_items, {
'Fresh Diary Milk': {
'name': 'Fresh Diary Milk',
'quantity': 20,
'unit_price': 1000
}
})
def test_stock_adds_multiple_stock_items(self):
items = [
StockItem('Fresh Diary Milk', 1000),
StockItem('Bic Pen', 2000)
]
for item in items:
self.stock.update_stock(item, 20)
self.assertEqual(
self.stock.stock_items, {
'Fresh Diary Milk': {
'name': 'Fresh Diary Milk',
'quantity': 20,
'unit_price': 1000
},
'Bic Pen': {
'name': 'Bic Pen',
'quantity': 20,
'unit_price': 2000
}
})
def test_stock_updates_existing_stock_item(self):
item = StockItem('Fresh Diary Milk', 1000)
self.stock.update_stock(item, 20)
self.stock.update_stock(item, 40)
self.assertEqual(
self.stock.stock_items, {
'Fresh Diary Milk': {
'name': 'Fresh Diary Milk',
'quantity': 60,
'unit_price': 1000
}
})
def test_stock_get_sub_total_return_the_cost_of_a_line_item(self):
item = StockItem('Fresh Diary Milk', 1000)
self.stock.update_stock(item, 20)
line_item = LineItem('Fresh Diary Milk', 10)
sub_total = self.stock.get_sub_total(line_item)
self.assertEqual(sub_total, 10000)
def test_get_all_trades_for_stock(self):
th = TradeHandler()
stock1 = Stock('ABC', 10, 100)
stock2 = Stock('ABD', 10, 100)
stock3 = Stock('ABC', 10, 100, is_preferred=True, fixed_dividend=3)
trade_stock2_1 = th.buy_stock(stock2, 2, 10)
trade_stock2_2 = th.buy_stock(stock2, 2, 10)
trade_stock3_1 = th.buy_stock(stock3, 4, 2)
self.assertEquals([], th.get_all_trades_for_stock(stock1))
self.assertEquals(th.get_all_trades_for_stock(stock2),
[trade_stock2_1, trade_stock2_2])
self.assertEquals(th.get_all_trades_for_stock(stock3),
[trade_stock3_1])
def test_multiple_transactions(self):
th = TradeHandler()
stock1 = Stock('ABC', 10, 100)
stock2 = Stock('ABD', 10, 100)
stock3 = Stock('ABC', 10, 100, is_preferred=True, fixed_dividend=3)
trade_stock1_1 = th.sell_stock(stock1, 2, 10)
trade_stock1_2 = th.sell_stock(stock1, 3, 10)
trade_stock1_3 = th.buy_stock(stock1, 4, 10)
trade_stock2_1 = th.sell_stock(stock2, 2, 10)
trade_stock3_1 = th.sell_stock(stock3, 2, 10)
self.assertEquals(th._trades['ABC']['common'],
[trade_stock1_1, trade_stock1_2, trade_stock1_3])
self.assertEquals(th._trades['ABD']['common'], [trade_stock2_1])
self.assertEquals(th._trades['ABC']['preferred'], [trade_stock3_1])
def test_get_volume_wighted_stock_price_with_only_old_trades(self):
th = TradeHandler()
stock = Stock('ABC', 10, 100)
minus_16_minutes = datetime.datetime.now() - datetime.timedelta(
minutes=16)
th.buy_stock(stock, 2, 10, timestamp=minus_16_minutes)
with self.assertRaises(Exception) as context:
get_volume_weighted_stock_price(th, stock)
self.assertEquals(context.exception.message,
'No Trades found for the given Stock')
def test_buy_one_stock(self):
th = TradeHandler()
stock = Stock('ABC', 10, 100)
trade = th.buy_stock(stock, 2, 10)
trade_list = th._trades['ABC']['common']
self.assertEquals(1, len(trade_list))
self.assertEquals(trade_list[0], trade)
self.assertEquals(trade_list[0].quantity, 2)
self.assertEquals(trade_list[0].price, 10)
self.assertEquals(trade_list[0].indicator, TRADE_TYPE.BUY)
def test_get_volume_wighted_stock_price(self):
th = TradeHandler()
stock = Stock('ABC', 10, 100)
th.buy_stock(stock, 2, 10)
th.buy_stock(stock, 3, 10)
self.assertAlmostEqual(10.0,
get_volume_weighted_stock_price(th, stock))
th.sell_stock(stock, 10, 20)
self.assertAlmostEqual(16.66666,
get_volume_weighted_stock_price(th, stock),
delta=0.00001)
def test_get_all_share_index_with_no_valid_trades(self):
th = TradeHandler()
stock = Stock('ABC', 10, 100)
th.buy_stock(stock,
2,
10,
timestamp=datetime.datetime.now() -
datetime.timedelta(minutes=16))
with self.assertRaises(Exception) as context:
get_all_share_index(th)
self.assertEquals(context.exception.message,
'No Trades found for the given Stock')
def test_get_volume_wighted_stock_price_with_older_trades(self):
th = TradeHandler()
stock = Stock('ABC', 10, 100)
too_old = datetime.datetime.now() - datetime.timedelta(minutes=16)
should_be_okay = datetime.datetime.now() - datetime.timedelta(
minutes=14)
th.buy_stock(stock, 2, 10, timestamp=too_old)
th.buy_stock(stock, 2, 10, timestamp=should_be_okay)
th.buy_stock(stock, 3, 30, timestamp=should_be_okay)
th.buy_stock(stock, 1, 50)
self.assertAlmostEqual(26.66666,
get_volume_weighted_stock_price(th, stock),
delta=0.00001)
def test_get_all_trades_for_untraded_stock(self):
stock1 = Stock('ABC', 10, 100)
self.assertEquals(TradeHandler().get_all_trades_for_stock(stock1), [])
def test_invalid_preferred_stock(self):
with self.assertRaises(Exception) as context:
Stock('ABC', 12, 100, is_preferred=True)
self.assertEquals(
context.exception.message,
'You need to provide fixed_dividend for preferred stocks')
def test_get_pe_ratio(self):
stock = Stock('ABC', 12, 100)
self.assertAlmostEqual(0.75, stock.get_pe_ratio(3))
self.assertAlmostEqual(1.33333, stock.get_pe_ratio(4), delta=0.00001)
def test_get_preferred_dividend_yield_floats(self):
stock = Stock('ABC', 12, 100, is_preferred=True, fixed_dividend=2)
self.assertAlmostEqual(2.0, stock.get_dividend_yield(100))
self.assertAlmostEqual(6.66666,
stock.get_dividend_yield(30),
delta=0.00001)
def test_get_common_dividend_yield_floats(self):
stock = Stock('ABC', 10, 100)
self.assertAlmostEqual(0.1, stock.get_dividend_yield(100))
self.assertAlmostEqual(0.33333,
stock.get_dividend_yield(30),
delta=0.00001)
def setUp(self):
self.stock = Stock()
def test_get_dividend_yield_with_zero(self):
stock = Stock('ABC', 12, 100)
with self.assertRaises(Exception) as context:
stock.get_dividend_yield(0)
self.assertEquals(context.exception.message, 'Price cant be zero')
def __init__(self, name):
self.name = name
self.stock = Stock()
def test_get_common_dividend_yield_ints(self):
stock = Stock('ABC', 12, 100)
self.assertEquals(1, stock.get_dividend_yield(12))
self.assertEquals(2, stock.get_dividend_yield(6))
self.assertEquals(3, stock.get_dividend_yield(4))
def test_get_preferred_dividend_yield_ints(self):
stock = Stock('ABC', 12, 100, is_preferred=True, fixed_dividend=2)
self.assertEquals(1, stock.get_dividend_yield(200))
self.assertEquals(4, stock.get_dividend_yield(50))
self.assertEquals(10, stock.get_dividend_yield(20))