def test_transfer():
assert list(ledger('''
open cash 100
open expenses 0
transfer cash expenses 50
balance cash
balance expenses
''')) == [("cash",5000),("expenses",5000)]
def test_open2():
'''test exception for string with open that opens existing account'''
ldgr = ledger('''
open cash 100
open cash 0
''')
with pytest.raises(ValueError, match="open"):
next(ldgr)
def test_transfer2():
'''test exception for string with transfer before both accounts involved are opened'''
ldgr = ledger('''
open cash 100
transfer cash expenses 50
''')
with pytest.raises(ValueError, match="transfer"):
next(ldgr)
def test_ledger():
'''test assignment's example'''
assert list(ledger('''
open cash 100
open expenses 0
open equity 0
transfer cash expenses 50
transfer equity cash 100
balance cash
balance expenses
''')) == [("cash",15000),("expenses",5000)]
def test_crash():
'''test exception for string with unexpected value'''
ldgr = ledger("open &crash 100")
with pytest.raises(ValueError, match="&crash"):
next(ldgr)
def test_open():
assert list(ledger('''
open cash 100
balance cash
''')) == [("cash",10000)]
def test_balance():
assert list(ledger('''
balance cash
balance stock
''')) == [("cash",0),("stock",0)]
def test_empty():
assert list(ledger("")) == []