1 files changed, 45 insertions, 0 deletions
diff --git a/tests/test_opcodes.c b/tests/test_opcodes.c
new file mode 100644
index 0000000..27bfbf3
--- /dev/null
+++ b/tests/test_opcodes.c
@@ -0,0 +1,45 @@
+#include <assert.h>
+#include <stdio.h>
+
+#include "fvm.h"
+
+char code[4096];
+char stack[4096];
+int code_cursor = 0;
+struct fvm vm;
+
+static void reset() {
+  vm.pc = (int64_t)code;
+  vm.sp = (int64_t)stack + 4095;
+  vm.bp = (int64_t)stack + 4095;
+  code_cursor = 0;
+}
+
+static void emit_op(enum fvm_op op) {
+  code[code_cursor] = (char)op;
+  code_cursor++;
+}
+static void emit_num(int64_t x) {
+  *(int64_t*)(code + code_cursor) = x;
+  code_cursor += 8;
+}
+
+void test_imm() {
+  printf("[TEST] imm\n");
+
+  reset();
+
+  emit_op(FVM_OP_IMM);
+  emit_num(3);
+  emit_op(FVM_OP_EXIT);
+
+  assert(fvm_execute(&vm) == 3);
+
+  printf("[PASS] imm\n");
+}
+
+int main()
+{
+  test_imm(); 
+  return 0;
+}