therubyrhino/spec/rhino/wormhole_spec.rb

require File.expand_path('../spec_helper', File.dirname(__FILE__))

describe Rhino::To do
  
  describe "ruby translation" do
    
    it "converts javascript NOT_FOUND to ruby nil" do
      Rhino::To.ruby(Rhino::JS::Scriptable::NOT_FOUND).should be_nil
    end
  
    it "converts javascript undefined into nil" do
      Rhino::To.ruby(Rhino::JS::Undefined.instance).should be_nil
    end
    
    it "does return javascript object" do
      Rhino::JS::NativeObject.new.tap do |js_obj|
        Rhino::To.ruby(js_obj).tap do |rb_obj|
          rb_obj.should be(js_obj)
        end
      end
    end
    
    it "wraps native javascript arrays into a ruby NativeArray wrapper" do
      Rhino::JS::NativeArray.new([1,2,4].to_java).tap do |js_array|
        Rhino::To.ruby(js_array).should == [1,2,4]
      end
    end
    
    it "does return javascript function" do
      
      klass = Class.new(Rhino::JS::BaseFunction)
      
      klass.new.tap do |js_fn|
        Rhino::To.ruby(js_fn).tap do |rb_fn|
          rb_fn.should be(js_fn)
        end
      end
      
    end
    
    it "leaves native ruby objects alone" do
      Object.new.tap do |o|
        Rhino::To.ruby(o).should be(o)
      end
    end
    
    it "it unwraps wrapped java objects" do
      Rhino::Context.open do |cx|
        scope = cx.scope
        j_str = java.lang.String.new("Hello World")
        Rhino::JS::NativeJavaObject.new(scope, j_str, j_str.getClass()).tap do |o|
          Rhino::To.ruby(o).should == "Hello World"
        end
      end
    end
    
  end
  
  describe  "javascript translation" do
    
    it "passes primitives through to the js layer to let jruby and rhino do he thunking" do
      Rhino::To.javascript(1).should be(1)
      Rhino::To.javascript(2.5).should == 2.5
      Rhino::To.javascript("foo").should == "foo"
      Rhino::To.javascript(true).should be(true)
      Rhino::To.javascript(false).should be(false)
      Rhino::To.javascript(nil).should be_nil
    end
    
    it "leaves native javascript objects alone" do
      Rhino::JS::NativeObject.new.tap do |o|
        Rhino::To.javascript(o).should be(o)
      end
    end
    
    it "converts ruby arrays into javascript arrays" do
      Rhino::To.javascript([1,2,3,4,5]).tap do |a|
        a.should be_kind_of(Rhino::JS::NativeArray)
        a.get(0,a).should be(1)
        a.get(1,a).should be(2)
        a.get(2,a).should be(3)
        a.get(3,a).should be(4)
        a.prototype.should be_nil # this is how Rhino works !
      end
    end
    
    it "converts ruby hashes into native objects" do
      Rhino::To.javascript({ :bare => true }).tap do |h|
        h.should be_kind_of(Rhino::JS::NativeObject)
        h.get("bare", h).should be(true)
        h.prototype.should be_nil # this is how Rhino works !
      end
    end
    
    describe "with a scope" do
      
      before do
        factory = Rhino::JS::ContextFactory.new
        context = nil
        factory.call do |ctx|
          context = ctx
          @scope = context.initStandardObjects(nil, false)
        end
        factory.enterContext(context)
      end

      after do
        Rhino::JS::Context.exit
      end
      
      it "converts ruby arrays into javascript arrays" do
        Rhino::To.javascript([1,2,3,4,5], @scope).tap do |a|
          a.should be_kind_of(Rhino::JS::NativeArray)
          a.get(0,a).should be(1)
          a.get(1,a).should be(2)
          a.get(2,a).should be(3)
          a.get(3,a).should be(4)
          a.prototype.should_not be_nil
        end
      end

      it "converts ruby hashes into native objects" do
        Rhino::To.javascript({ :bare => true }, @scope).tap do |h|
          h.should be_kind_of(Rhino::JS::NativeObject)
          h.get("bare", h).should be(true)
          h.prototype.should_not be_nil
        end
      end
      
    end
    
    it "converts procs and methods into native functions" do
      Rhino::To.javascript(lambda {|lhs,rhs| lhs * rhs}).tap do |f|
        f.should be_kind_of(Rhino::JS::Function)
        f.call(nil, nil, nil, [7,6]).should be(42)
      end
      
      Rhino::To.javascript("foo,bar,baz".method(:split)).tap do |m|
        m.should be_kind_of(Rhino::JS::Function)
        Rhino::To.ruby(m.call(nil, nil, nil, ',')).should == ['foo', 'bar', 'baz']
      end
    end

    it "creates a prototype for the object based on its class" do
      Class.new.tap do |klass|
        klass.class_eval do
          def foo(one, two)
            "1: #{one}, 2: #{two}"
          end
        end

        Rhino::To.javascript(klass.new).tap do |o|
          o.should be_kind_of(Rhino::RubyObject)
          o.prototype.tap do |p|
            p.should_not be_nil
            p.get("foo", p).should_not be_nil
            p.get("toString", p).should_not be_nil
          end
        end
      end
    end
    
  end
  
end