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platform_is :windows do
  require 'win32ole'

  describe "WIN32OLE_METHOD#offset_vtbl" do
    before :each do
      ole_type = WIN32OLE_TYPE.new("Microsoft Scripting Runtime", "File")
      @m_file_name = WIN32OLE_METHOD.new(ole_type, "name")
    end

    it "raises ArgumentError if argument is given" do
      lambda { @m_file_name.offset_vtbl(1) }.should raise_error ArgumentError
    end

    it "returns expected value for Scripting Runtime's 'name' method" do
      pointer_size = RUBY_PLATFORM =~ /\bx64\b/ ? 64 : 1.size * 8
      @m_file_name.offset_vtbl.should == pointer_size
    end

  end

end