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Add compare_test().

This commit is contained in:
Andrew Keeton 2014-11-13 19:52:10 -05:00
parent 196968687f
commit 233c36ce7e
1 changed files with 50 additions and 0 deletions
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50
src/machine.rs
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@ -1030,3 +1030,53 @@ fn branch_if_overflow_set_test() {
machine.branch_if_overflow_set(Address(0xABCD));
assert_eq!(machine.registers.program_counter, Address(0xABCD));
}
#[test]
fn compare_test() {
let mut machine = Machine::new();
machine.execute_instruction(
(instruction::LDA, instruction::UseImmediate(127))
);
machine.compare(127);
assert!( machine.registers.status.contains(PS_ZERO ));
assert!( machine.registers.status.contains(PS_CARRY ));
assert!(!machine.registers.status.contains(PS_NEGATIVE));
machine.execute_instruction(
(instruction::LDA, instruction::UseImmediate(127))
);
machine.compare(1);
assert!(!machine.registers.status.contains(PS_ZERO ));
assert!( machine.registers.status.contains(PS_CARRY ));
assert!(!machine.registers.status.contains(PS_NEGATIVE));
machine.execute_instruction(
(instruction::LDA, instruction::UseImmediate(1))
);
machine.compare(2);
assert!(!machine.registers.status.contains(PS_ZERO ));
assert!(!machine.registers.status.contains(PS_CARRY ));
assert!(!machine.registers.status.contains(PS_NEGATIVE));
machine.execute_instruction(
(instruction::LDA, instruction::UseImmediate(1))
);
machine.compare(2);
assert!(!machine.registers.status.contains(PS_ZERO ));
assert!(!machine.registers.status.contains(PS_CARRY ));
assert!( machine.registers.status.contains(PS_NEGATIVE));
machine.execute_instruction(
(instruction::LDA, instruction::UseImmediate(20))
);
machine.compare(-50);
assert!(!machine.registers.status.contains(PS_ZERO ));
assert!( machine.registers.status.contains(PS_CARRY ));
assert!(!machine.registers.status.contains(PS_NEGATIVE));
}