gistfile1.rb

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

describe JavascriptObfuscator do
  def obfuscate(js)
    JavascriptObfuscator.obfuscate(js)
  end
  
  it "should rename properties starting with an underscore in accessing notation" do
    obfuscate("object._aPrivateProperty").should == "object._a"
    obfuscate("object .
      _aPrivateProperty").should == "object .
      _a"
  end
  
  it "should rename properties starting with an underscore in litteral notation" do
    obfuscate("{ _aPrivateProperty: true }").should == "{ _a: true }"
    obfuscate("{_aPrivateProperty:true}").should == "{_a:true}"
    obfuscate("{
      aPublicProperty: false,
      _aPrivateProperty: true
    }").should == "{
      aPublicProperty: false,
      _a: true
    }"
  end
  
  it "should not rename variables starting with an underscore (as tools like YUI compressor already deal with it)" do
    obfuscate("_aPrivateVariable").should == "_aPrivateVariable"
    obfuscate("var _aPrivateVariable").should == "var _aPrivateVariable"
  end
  
  it "should not rename propeties starting with an underscore in bracket accessing notation" do
    obfuscate('object["_aPrivateProperty"]').should == 'object["_aPrivateProperty"]'
  end
  
  it "should use different identifiers for different obfuscated properties" do
    obfuscate("{ _first: 1, _second: 2, _third: 3 }").should == "{ _a: 1, _b: 2, _c: 3 }"
  end
  
  it "should use the same identifier for the same obfuscated property" do
    obfuscate("var a = { _aPrivateProperty: true }; a._aPrivateProperty = false;").should ==
      "var a = { _a: true }; a._a = false;"
  end
  
  it "should always use valid identifiers (i.e. containing valid characters)" do
    # "o._a;o._aa;o._aaa;[...]"
    js = (1..100).collect { |i| "o._#{'a' * i}" }.join(";")
    obfuscate(js).should =~ /(o\._(\w+);){99}/
  end
end