move interpreter tests to register

to shadow the interpreter move / the lib structure

test/register/interpreter/test_mult.rb

@@ -0,0 +1,36 @@
+require_relative "helper"
+
+class MultTest < MiniTest::Test
+  include Ticker
+  include AST::Sexp
+
+  def setup
+    @string_input = <<HERE
+class Object
+  int main()
+    return #{2**31} * #{2**31}
+  end
+end
+HERE
+    super
+  end
+
+  def test_mult
+    #show_ticks # get output of what is
+    check_chain ["Branch","Label","LoadConstant","GetSlot","SetSlot",
+     "LoadConstant","SetSlot","FunctionCall","Label","LoadConstant",
+     "LoadConstant","OperatorInstruction","SetSlot","Label","FunctionReturn",
+     "RegisterTransfer","Syscall","NilClass"]
+     check_return 0
+  end
+  def test_overflow
+    ticks( 12 )
+    assert @interpreter.flags[:overflow]
+  end
+
+  def test_zero
+    ticks( 12 )
+    assert @interpreter.flags[:zero]
+  end
+
+end