public void TestSuccessiveSameAdds()
{
CashMachine atm = new CashMachine();
// Add a 500
atm.AddCash(500, 1);
Dictionary <Int32, Int32> remainingCash = new Dictionary <Int32, Int32> {
{ 500, 1 }, { 200, 0 }, { 100, 0 }, { 50, 0 }, { 20, 0 }, { 10, 0 }, { 5, 0 }
};
Assert.AreEqual(remainingCash, atm.RemainingCash,
"Adding one 500 to an empty machine should change the remaining cash accordingly"
);
// Add two 500
atm.AddCash(500, 2);
remainingCash[500] = 3;
Assert.AreEqual(remainingCash, atm.RemainingCash,
"Adding two 500 to a one 500 machine should change the remaining cash accordingly"
);
// Add ten 500
atm.AddCash(500, 10);
remainingCash[500] = 13;
Assert.AreEqual(remainingCash, atm.RemainingCash,
"Adding ten 500 to a three 500 machine should change the remaining cash accordingly"
);
}
public void TestMultipleBillWithdraw()
{
CashMachine atm = new CashMachine();
atm.AddCash(500, 10);
atm.AddCash(200, 10);
atm.AddCash(100, 10);
atm.AddCash(50, 10);
atm.AddCash(20, 10);
atm.AddCash(10, 10);
atm.AddCash(5, 10);
Dictionary <Int32, Int32> withdrawedCash = new Dictionary <Int32, Int32> {
{ 500, 1 }, { 200, 1 }, { 100, 1 }, { 50, 1 }, { 20, 2 }, { 5, 1 }
};
Assert.AreEqual(withdrawedCash, atm.Withdraw(895),
"Withdraw 895 should get you one of each 500/200/100/50/5 and two 20 if the machine have enough"
);
Dictionary <Int32, Int32> remainingCash = new Dictionary <Int32, Int32> {
{ 500, 9 }, { 200, 9 }, { 100, 9 }, { 50, 9 }, { 20, 8 }, { 10, 10 }, { 5, 9 }
};
Assert.AreEqual(remainingCash, atm.RemainingCash,
"Withdrawing 895 from a machine with ten of each bill should change the machine accordingly"
);
}
public void TestAddZero()
{
CashMachine atm = new CashMachine();
atm.AddCash(200, 0);
Dictionary <Int32, Int32> remainingCash = new Dictionary <Int32, Int32> {
{ 500, 0 }, { 200, 0 }, { 100, 0 }, { 50, 0 }, { 20, 0 }, { 10, 0 }, { 5, 0 }
};
Assert.AreEqual(remainingCash, atm.RemainingCash,
"Adding 0 of an existing bill should let the CashMachine unchanged");
}
public void TestNotEnoughWithdraw()
{
CashMachine atm = new CashMachine();
atm.AddCash(10, 1);
atm.AddCash(5, 1);
Dictionary <Int32, Int32> withdrawedCash = new Dictionary <Int32, Int32> {
{ 10, 1 }, { 5, 1 }
};
Assert.AreEqual(withdrawedCash, atm.Withdraw(40),
"Withdrawing 40 from a machine with one 10 and one 5 should get you one 10 and one 5"
);
Dictionary <Int32, Int32> remainingCash = new Dictionary <Int32, Int32> {
{ 500, 0 }, { 200, 0 }, { 100, 0 }, { 50, 0 }, { 20, 0 }, { 10, 0 }, { 5, 0 }
};
Assert.AreEqual(remainingCash, atm.RemainingCash,
"Withdrawing 40 from a machine with one 10 and one 5 should left the machine empty (0 of each bills)"
);
}
public void TestAddNegative()
{
CashMachine atm = new CashMachine();
Dictionary <Int32, Int32> remainingCash = new Dictionary <Int32, Int32> {
{ 500, 0 }, { 200, 0 }, { 100, 0 }, { 50, 0 }, { 20, 0 }, { 10, 0 }, { 5, 0 }
};
Assert.Throws <ArgumentException>(delegate
{
atm.AddCash(100, -1); //
}, "An exception should be throwned when adding a negative number of an existing bill");
Assert.AreEqual(remainingCash, atm.RemainingCash,
"Adding a negative number of an existing bill should let the CashMachine unchanged"
);
}
public void TestSuccessiveDifferentAdds()
{
CashMachine atm = new CashMachine();
// Add a 200
atm.AddCash(200, 1);
Dictionary <Int32, Int32> remainingCash = new Dictionary <Int32, Int32> {
{ 500, 0 }, { 200, 1 }, { 100, 0 }, { 50, 0 }, { 20, 0 }, { 10, 0 }, { 5, 0 }
};
Assert.AreEqual(remainingCash, atm.RemainingCash,
"Adding one 200 to an empty machine should change the remaining cash accordingly"
);
// Add a 100
atm.AddCash(100, 1);
remainingCash[100] = 1;
Assert.AreEqual(remainingCash, atm.RemainingCash,
"Adding one 100 to a one 200 machine should change the remaining cash accordingly"
);
// Add a 50
atm.AddCash(50, 1);
remainingCash[50] = 1;
Assert.AreEqual(remainingCash, atm.RemainingCash,
"Adding one 50 to a one 200/100 machine should change the remaining cash accordingly"
);
// Add a 20
atm.AddCash(20, 1);
remainingCash[20] = 1;
Assert.AreEqual(remainingCash, atm.RemainingCash,
"Adding one 20 to a one 200/100/50 machine should change the remaining cash accordingly"
);
// Add a 10
atm.AddCash(10, 1);
remainingCash[10] = 1;
Assert.AreEqual(remainingCash, atm.RemainingCash,
"Adding one 10 to a one 200/100/50/20 machine should change the remaining cash accordingly"
);
// Add a 5
atm.AddCash(5, 1);
remainingCash[5] = 1;
Assert.AreEqual(remainingCash, atm.RemainingCash,
"Adding one 5 to a one 200/100/50/20/10 machine should change the remaining cash accordingly"
);
}