Use PARSER_CONTEXT for tokenizer tests

spec/spec_helper.rb

@@ -93,6 +93,13 @@ module Handlebars
       end
     end
 
+    PARSER_CONTEXT = V8::Context.new
+    PARSER_CONTEXT.instance_eval do |context|
+      Handlebars::Spec.load_helpers(context);
+
+      Handlebars::Spec.js_load(context, 'lib/handlebars/compiler/parser.js');
+    end
+
     COMPILE_CONTEXT = V8::Context.new
     COMPILE_CONTEXT.instance_eval do |context|
       Handlebars::Spec.load_helpers(context);

spec/tokenizer_spec.rb

@@ -2,12 +2,9 @@ require "spec_helper"
 require "timeout"
 
 describe "Tokenizer" do
-  let(:parser) { @context["handlebars"] }
-  let(:lexer) { @context["handlebars"]["lexer"] }
+  let(:parser) { Handlebars::Spec::PARSER_CONTEXT["handlebars"] }
+  let(:lexer) { Handlebars::Spec::PARSER_CONTEXT["handlebars"]["lexer"] }
 
-  before(:all) do
-    @compiles = true
-  end
   Token = Struct.new(:name, :text)
 
   def tokenize(string)