```ruby
require_relative '../test_helper'

describe Gst::Iterator do
  let(:bin) { Gst::Bin.new 'bin' }
  let(:fakesink) { Gst::ElementFactory.make 'fakesink', 'testname' }
  let(:iterator) { bin.iterate_elements }

  before do
    bin.add fakesink
  end

  it 'behaves like an Enumerable' do
    iterator.must_be_kind_of Gst::Iterator
    iterator.map(&:name).must_equal ['testname']
  end

  it 'allows re-starting the iteration' do
    iterator.map(&:name).must_equal ['testname']
    iterator.map(&:name).must_equal ['testname']
  end
end
```

Add test to demonstrate breaking of the loop works
user
```ruby
require_relative '../test_helper'

describe Gst::Iterator do
  let(:bin) { Gst::Bin.new 'bin' }
  let(:fakesink) { Gst::ElementFactory.make 'fakesink', 'testname' }
  let(:iterator) { bin.iterate_elements }

  before do
    bin.add fakesink
  end

  it 'behaves like an Enumerable' do
    iterator.must_be_kind_of Gst::Iterator
    iterator.map(&:name).must_equal ['testname']
  end

  it 'allows re-starting the iteration' do
    iterator.map(&:name).must_equal ['testname']
    iterator.map(&:name).must_equal ['testname']
  end

  it 'allows breaking off the loop' do
    bin.add Gst::ElementFactory.make 'fakesink', 'othername'
    iterator.map(&:name).must_equal ['othername', 'testname']
    result = nil
    iterator.each { |it| result = it; break if it.name == 'othername' }
    result.name.must_equal 'othername'
  end
end
```
assistant