public void TestStackFrameRegisterState_WhenReturningFromAFunctionCall_TheRegistersShouldBeRestoredToTheirPreCallValues()
{
// Arrange
var tacs = new Tacs
{
Tac.Init(0),
Tac.SetRegisterValue(1, 11),
Tac.SetRegisterValue(2, 11),
Tac.SetRegisterValue(3, 11),
Tac.SetRegisterValue(4, 11),
Tac.SetRegisterValue(5, 11),
Tac.SetRegisterValue(6, 11),
Tac.BeginCall("main", 0, "t0"),
Tac.Call("main", "t0"),
Tac.PrintRegisters(),
Tac.Halt(),
Tac.BeginFunc("main", 0),
Tac.SetRegisterValue(1, 22),
Tac.SetRegisterValue(2, 22),
Tac.SetRegisterValue(3, 22),
Tac.SetRegisterValue(4, 22),
Tac.SetRegisterValue(5, 22),
// cant mess with r6 because this is the stack pointer
Tac.EndFunc("main")
};
var output = new CodeGenerator().Generate(tacs);
// Act
var tinyOut = new TinyMachine(ExePath, TestFilePath).Execute(output);
// Assert
Assert.That(tinyOut, Is.EqualTo(new[] { "0", "11", "11", "11", "11", "11", "11" }), tinyOut.ToString());
}