Add vm_test.go

vm_test.go

@@ -0,0 +1,21 @@
+package main
+
+import (
+ "testing"
+)
+
+func TestVM(t *testing.T) {
+ C := func(i value) Entry { return constantEntry(i) }
+ Op := func(o opcode) Entry { return opEntry(o) }
+ // Make our stack
+ s := newStack()
+ // Create code to push 1 and 2 on the stack, add them, print the
+ // result, and return:
+ c := newChunk(C(1), C(2), Op(op_add), Op(op_ret))
+ // Run the code in a new VM:
+ vm := newVM(c)
+ // Run the VM
+ if vm.run(s) != 3 {
+ t.Error("vm should return 3")
+ }
+}