start on collector for local variables

test/melon/compiler/test_all.rb

@@ -1,2 +1,3 @@
 require_relative "test_type_collector"
 require_relative "test_method_collector"
+require_relative "test_locals_collector"

test/melon/compiler/test_locals_collector.rb

@@ -0,0 +1,35 @@
+require_relative "helper"
+
+module Melon
+  class TestLocalsCollector < MiniTest::Test
+
+    def setup
+      Register.machine.boot unless Register.machine.booted
+    end
+
+    def parse_collect( input )
+      ast = Parser::Ruby22.parse input
+      LocalsCollector.new.collect(ast)
+    end
+
+    def test_no_locals
+      locals = parse_collect "def meth; end"
+      assert locals.empty?
+    end
+
+    def test_method_is_not_local
+      locals = parse_collect("def meth2(arg1); foo ;end")
+      assert locals.empty?
+    end
+
+    def test_local_assign_one
+      locals = parse_collect("def meth2(arg1); foo = bar ;end")
+      assert locals[:foo] , locals.inspect
+    end
+    def test_local_assign_two
+      locals = parse_collect("def meth2(arg1); foo = bar ; groove = 1 + 2 ;end")
+      assert locals.length == 2 , locals.inspect
+    end
+
+  end
+end