def mock_client
  return @mock_client if @mock_client
  @mock_client = double('client')
  @getter = double('getter')
  allow(@getter).to receive(:get).and_return('')
  allow(@mock_client).to receive(:[]).with('describe?xml=true').and_return('')
  @mock_client
end

def stub_get(pid, datastreams = nil, record_exists = false)
  pid.gsub!(/:/, '%3A')
  if record_exists
    allow(mock_client).to receive(:[]).with("objects/#{pid}?format=xml").and_return(double('get getter', :get => 'foobar'))
  else
    allow(mock_client).to receive(:[]).with("objects/#{pid}?format=xml").and_raise(RestClient::ResourceNotFound)
  end
  allow(mock_client).to receive(:[]).with("objects/#{pid}/datastreams?format=xml").and_return(@getter)
  datastreams ||= ['someData', 'withText', 'withText2', 'RELS-EXT']
  datastreams.each do |dsid|
    allow(mock_client).to receive(:[]).with("objects/#{pid}/datastreams/#{dsid}?format=xml").and_return(@getter)
  end
end

def stub_ingest(pid = nil)
  n = pid ? pid.gsub(/:/, '%3A') : nil
  expect(mock_client).to receive(:[]).with("objects/#{n || 'new'}").and_return(double('ingester', :post => pid))
end

def stub_add_ds(pid, dsids)
  pid.gsub!(/:/, '%3A')
  dsids.each do |dsid|
    client = allow(mock_client).to receive(:[]).with(no_args) do |params|
      /objects\/#{pid}\/datastreams\/#{dsid}/.match(params)
    end
    client.and_return(double('ds_adder', :post => pid, :get => ''))
  end
end

def stub_get_content(pid, dsids)
  pid.gsub!(/:/, '%3A')
  dsids.each do |dsid|
    allow(mock_client).to receive(:[]).with(no_args) { |params| /objects\/#{pid}\/datastreams\/#{dsid}\/content/.match(params)}.and_return(double('content_accessor', :post => pid, :get => ''))
  end
end