more slot tests, also in separate files

test/mom/instruction/test_slot_definition3.rb

@@ -0,0 +1,27 @@
+require_relative "helper"
+
+module Mom
+  class TestSlotDefinitionKnown2 < MiniTest::Test
+    def setup
+      Risc.machine.boot
+      @compiler = CompilerMock.new
+      @definition = SlotDefinition.new(:message , [:caller , :type])
+      @instruction = @definition.to_register(@compiler , InstructionMock.new)
+    end
+    def test_def_next_class
+      assert_equal Risc::SlotToReg , @instruction.next.class
+    end
+    def test_def_next_next_class
+      assert_equal NilClass , @instruction.next.next.class
+    end
+    def test_def_next_index
+      assert_equal 0 , @instruction.next.index
+    end
+    def test_def_next_register
+      assert_equal :r1 , @instruction.next.register.symbol
+    end
+    def test_def_next_array
+      assert_equal :r1 , @instruction.next.array.symbol
+    end
+  end
+end