#Ex 7.2 from "A primer on..."
# add an attribute to a class


class Account2:
    def __init__(self, name, account_number, initial_amount):
        self.name = name
        self.no = account_number
        self.balance = initial_amount
        self.transactions = 1

    def deposit(self, amount):
        self.balance += amount
        self.transactions += 1

    def withdraw(self, amount):
        self.balance -= amount
        self.transactions += 1

    def dump(self):
        s = f"{self.name}, {self.no}, balance: {self.balance}, transactions: {self.transactions}"
        print(s)

"""
Simple way to test a class:
1. Create an instance with given attributes
2. Call some methods that change these attributes
3. Check that the attributes' values are as expected.
"""

def test_Account2():
    a = Account2('js',1234,0)
    a.deposit(100)
    a.withdraw(50)
    expected = (50,3) #(balance,transactions)
    success = (a.balance, a.transactions) == expected
    assert success

test_Account2()

a1 = Account2('Joakim',12345,100)
a1.deposit(50)
a1.withdraw(10)
a1.dump()

"""
Terminal> python Account2.py
Joakim, 12345, balance: 140, transactions: 3
"""