@Test
public void testDiv() throws StackRuntimeException {
List<Instruction> instructions = new ArrayList<Instruction>();
instructions.add(new Instruction("const", new IntStackValue(5)));
instructions.add(new Instruction("const", new IntStackValue(2)));
instructions.add(new Instruction("div"));
StackMachine machine = new StackMachine(instructions);
machine.step();
machine.step();
machine.step();
assertEquals(new Integer(2), machine.getStack().pop().getValue());
assertEquals(0, machine.getStack().size());
}
@Test
public void testJezFail() throws StackRuntimeException {
List<Instruction> instructions = new ArrayList<Instruction>();
instructions.add(new Instruction("const", new IntStackValue(1)));
instructions.add(new Instruction("jez", new StringStackValue("fail")));
instructions.add(new Instruction("const", new IntStackValue(2)));
instructions.add(new Instruction("label", new StringStackValue("fail")));
instructions.add(new Instruction("const", new IntStackValue(3)));
StackMachine machine = new StackMachine(instructions);
machine.step();
machine.step();
machine.step();
assertEquals(new Integer(2), machine.getStack().pop().getValue());
}
@Test
public void testLoad() throws StackRuntimeException {
List<Instruction> instructions = new ArrayList<Instruction>();
instructions.add(new Instruction("load", new IntStackValue(0)));
StackMachine machine = new StackMachine(instructions);
machine.setStore(0, new IntStackValue(2));
machine.step();
assertEquals(new Integer(2), machine.getStack().pop().getValue());
}
@Test
public void testInput() throws StackRuntimeException {
List<Instruction> instructions = new ArrayList<Instruction>();
instructions.add(new Instruction("input"));
List<StackValue<?>> input = new ArrayList<StackValue<?>>();
input.add(new IntStackValue(2));
StackMachine machine = new StackMachine(instructions, input);
machine.step();
assertEquals(new Integer(2), machine.getStack().pop().getValue());
}