add C::ContextHelper to wrap native test cases

spec/c/array_spec.rb

@@ -1,13 +1,7 @@
 require 'spec_helper'
 
 describe V8::C::Array do
-  before do
-    @cxt = V8::C::Context::New()
-    @cxt.Enter()
-  end
-  after do
-    @cxt.Exit()
-  end
+  include C::ContextHelper
   it "can store and retrieve a value" do
     V8::C::HandleScope() do
       o = V8::C::Object::New()

spec/c/context_helper.rb

@@ -0,0 +1,15 @@
+module C
+  module ContextHelper
+    def self.included(base)
+      base.instance_eval do
+        before do
+          @cxt = V8::C::Context::New()
+          @cxt.Enter()
+        end
+        after do
+          @cxt.Exit()
+        end
+      end
+    end
+  end
+end

spec/c/external_spec.rb

@@ -1,13 +1,7 @@
 require 'spec_helper'
 
 describe V8::C::External do
-  before do
-    @cxt = V8::C::Context::New()
-    @cxt.Enter()
-  end
-  after do
-    @cxt.Exit()
-  end
+  include C::ContextHelper
   it "can store and retrieve a value" do
     V8::C::HandleScope() do
       o = Object.new

spec/c/function_spec.rb

@@ -1,13 +1,7 @@
 require 'spec_helper'
 
 describe V8::C::Function do
-  before do
-    @cxt = V8::C::Context::New()
-    @cxt.Enter()
-  end
-  after do
-    @cxt.Exit()
-  end
+  include C::ContextHelper
   it "can be called" do
     V8::C::HandleScope() do
       fn = run '(function() {return "foo"})'

spec/c/handles_spec.rb

@@ -1,9 +1,7 @@
 require 'spec_helper'
 
 describe "setting up handles scopes" do
-  before {@cxt = V8::C::Context::New()}
-  before {@cxt.Enter()}
-  after {@cxt.Exit()}
+  include C::ContextHelper
   it "can allocate handle scopes" do
     V8::C::HandleScope() do
       V8::C::Object::New()

spec/c/object_spec.rb

@@ -1,13 +1,8 @@
 require 'spec_helper'
 
 describe V8::C::Object do
-  before do
-    @cxt = V8::C::Context::New()
-    @cxt.Enter()
-  end
-  after do
-    @cxt.Exit()
-  end
+  include C::ContextHelper
+
   it "can store and retrieve a value" do
     V8::C::HandleScope() do
       o = V8::C::Object::New()

spec/c/script_spec.rb

@@ -1,13 +1,7 @@
 require 'spec_helper'
 
 describe V8::C::External do
-  before do
-    @cxt = V8::C::Context::New()
-    @cxt.Enter()
-  end
-  after do
-    @cxt.Exit()
-  end
+  include C::ContextHelper
   it "can run a script and return a polymorphic result" do
     V8::C::HandleScope() do
       source = V8::C::String::New("(new Array())")

spec/c/template_spec.rb

@@ -1,13 +1,7 @@
 require 'spec_helper'
 
 describe V8::C::Template do
-  before do
-    @cxt = V8::C::Context::New()
-    @cxt.Enter()
-  end
-  after do
-    @cxt.Exit()
-  end
+  include C::ContextHelper
 
   describe V8::C::FunctionTemplate do
     it "can be created with no arguments" do

spec/c/trycatch_spec.rb

@@ -1,13 +1,8 @@
 require 'spec_helper'
 
 describe V8::C::External do
-  before do
-    @cxt = V8::C::Context::New()
-    @cxt.Enter()
-  end
-  after do
-    @cxt.Exit()
-  end
+  include C::ContextHelper
+
   it "can catch javascript exceptions" do
     V8::C::V8::SetCaptureStackTraceForUncaughtExceptions(true, 99, V8::C::StackTrace::kDetailed)
     V8::C::TryCatch() do |trycatch|

spec/spec_helper.rb

@@ -1,4 +1,5 @@
 require 'v8'
+load File.expand_path '../c/context_helper.rb', __FILE__
 
 def run_v8_gc
   while !V8::C::V8::IdleNotification() do