more slot tests, also in separate files

test/mom/instruction/test_slot_definition1.rb

@@ -0,0 +1,22 @@
+require_relative "helper"
+
+module Mom
+
+  class TestSlotDefinitionConstant < MiniTest::Test
+    def setup
+      Risc.machine.boot
+      @compiler = CompilerMock.new
+      @definition = SlotDefinition.new(StringConstant.new("hi") , [])
+      @instruction = @definition.to_register(@compiler , InstructionMock.new)
+    end
+    def test_def_class
+      assert_equal Risc::LoadConstant , @instruction.class
+    end
+    def test_def_register
+      assert_equal :r1 , @instruction.register.symbol
+    end
+    def test_def_const
+      assert_equal "hi" , @instruction.constant.to_string
+    end
+  end
+end