package test

import "testing"

import "github.com/firestuff/subcoding/asm"
import "github.com/firestuff/subcoding/vm"

func TestLoop(t *testing.T) {
	prog, err := asm.AssembleString(`
functions:
- - [add, f0, 1]
  - [call, +1]
  - [ltu, f0, 3]
  - [jmpt, -3]

- - [add, g0, 1]
`)
	if err != nil {
		t.Fatal(err)
	}

	state, err := vm.NewState(prog)
	if err != nil {
		t.Fatal(err)
	}

	err = state.Execute()
	if err != nil {
		t.Fatal(err)
	}

	if state.GlobalMemory().MustReadUnsigned(0) != 3 {
		t.Fatalf("Expected 3, found %d\n", state.GlobalMemory().MustReadUnsigned(0))
	}
}