As a savings account holder
I want to transfer money from my savings account
So that I can get cash easily from an ATM

savings account is in credit

• Given my savings account balance is 100 dollars
• Given my cash account balance is 10 dollars
• When I transfer 20 dollars
• Then my savings account balance should be 80 dollars
• Then my cash account balance should be 30 dollars

savings account is overdrawn

• Given my savings account balance is -20 dollars
• Given my cash account balance is 10 dollars
• When I transfer 20 dollars
• Then my savings account balance should be -20 dollars
• Then my cash account balance should be 10 dollars
• Then I should still be poor