[wet]

Решено

$('#upload').on('click', function() {
		$('.question').each(function(i){
			var cur_el = $(this);
			var question = cur_el.attr('data-question');
			
			testList[i] = {
					testName : 'Тест',
					questionsList : {
						question : question,
						answerList : {}
					}	
				};
			
			cur_el.find('.answer').each(function(y){
				var answer = $(this).attr('data-answer');
				
				testList[i]['questionsList']['answerList'][y] = {answer : answer};
			});	
		});

		console.log(testList);		
	});