start to split tests according to feature

test/parser/helper.rb

@@ -0,0 +1,29 @@
+require_relative "../helper"
+
+module ParserTest
+  
+  def setup
+    @parser    = Parser::Composed.new
+    @transform = Parser::Transform.new
+  end
+
+  def check_parse
+    is = @parser.parse(@input)
+    #puts is.inspect
+    assert_equal @expected , is
+  end
+
+  def check_transform
+    is = @transform.apply @input
+    #puts is.transform
+    assert_equal @expected , is
+  end
+
+  def check_ast
+    syntax    = @parser.parse(@input)
+    tree      = @transform.apply(syntax)
+    # puts tree.inspect
+    assert_equal @expected , tree
+  end
+  
+end