# File test/test_Error.rb, line 176
    def test_doc_defined?
      @Error.document_error = {
        :document => 'Page',
        :arguments => [
          "Hello world.\n",
          'text/plain'
        ],
        :mount_path => '/error',
        :mount_mask => nil,
        :exception => RuntimeError.new('test')
      }
      assert(@Error.doc_defined?)
      @Error.document_error = {
        :document => 'Foo',
        :arguments => [],
        :mount_path => '/',
        :mount_mask => nil,
        :exception => RuntimeError.new('nothing')
      }
      assert(! @Error.doc_defined?)
    end