code: function sink( stream, clbk ) {
  		var actual = [];
  		stream.on( 'data', function onData( data ) {
  			actual.push( data );
  		});
  		stream.once( 'end', function onEnd() {
  			clbk( null, actual );
  		});
  		stream.once( 'error', function onError( error ) {
  			clbk( error );
  		});
  	}
docs: FUNCTION: sink( stream, clbk )
  Mocks reading from a stream.
  
  @param {Stream} stream - stream to read from
  @param {Function} clbk - callback to invoke after stream ends. The function should accept two arguments: [ error, data ].