fix positioned tests

thanks to codeclimate
the broken tests were still raising errors, just the wrong ones, but
coverage shoed it!

test/register/test_positioned.rb

@@ -0,0 +1,42 @@
+require_relative "../helper"
+
+class TestPositioned < MiniTest::Test
+  def setup
+    Register.machine.boot unless Register.machine.booted
+  end
+  def test_list1
+    list = Parfait.new_list([1])
+    assert_equal 32 , list.padded_length
+  end
+  def test_list5
+    list = Parfait.new_list([1,2,3,4,5])
+    assert_equal 32 , list.padded_length
+  end
+  def test_type
+    type = Parfait::Type.for_hash Parfait.object_space.get_class_by_name(:Object) , {}
+    type.set_type( type )
+    assert_equal 32 , type.padded_length
+  end
+  def test_word
+    word = Parfait::Word.new(12)
+    assert_equal 32 , word.padded_length
+  end
+  def test_raises_no_init
+    assert_raises { Positioned.position(self)}
+  end
+  def test_raises_set_nil
+    assert_raises { Positioned.set_position(self,nil)}
+  end
+  def test_raises_reset_far
+    assert_raises do
+      test = TestPosition.new
+      test.set_position  0
+      test.set_position  12000
+    end
+  end
+
+  def test_pos_arm
+    mov = Arm::ArmMachine.mov  :r1,  128
+    mov.set_position(0)
+  end
+end