| <!doctype html> | 
 | <html> | 
 |   <head> | 
 |     <title>XMLHttpRequest: responseType json</title> | 
 |     <meta charset="utf-8"> | 
 |     <script src="/resources/testharness.js"></script> | 
 |     <script src="/resources/testharnessreport.js"></script> | 
 |         <link rel="help" href="https://xhr.spec.whatwg.org/#the-responsetype-attribute" data-tested-assertations="following::OL[1]/LI[4]" /> | 
 |         <link rel="help" href="https://xhr.spec.whatwg.org/#the-response-attribute" data-tested-assertations="following::dt[2]/dt[4] following::dt[2]/dt[4]/following::dd[1]" /> | 
 |         <link rel="help" href="https://xhr.spec.whatwg.org/#json-response-entity-body" data-tested-assertations="following::ol[1]/li[1] following::ol[1]/li[2] following::ol[1]/li[3]" /> | 
 |  | 
 |   </head> | 
 |   <body> | 
 |     <div id="log"></div> | 
 |     <script> | 
 |       function setupXHR () { | 
 |         var client = new XMLHttpRequest() | 
 |         client.open('POST', "resources/content.py", true) | 
 |         client.responseType = 'json' | 
 |         return client | 
 |       } | 
 |       function makeTest(data, expectedResponse, description){ | 
 |         var test = async_test(description) | 
 |         var xhr = setupXHR() | 
 |         assert_equals(xhr.responseType, 'json') | 
 |         xhr.onreadystatechange = function(){ | 
 |             if(xhr.readyState === 4){ | 
 |                 test.step(function(){ | 
 |                     assert_equals(xhr.status, 200) | 
 |                     assert_equals(xhr.responseType, 'json') | 
 |                     assert_equals(typeof xhr.response, 'object') | 
 |                     if(expectedResponse){ // if the expectedResponse is not null, we iterate over properties to do a deeper comparison.. | 
 |                         for(var prop in expectedResponse){ | 
 |                           if (expectedResponse[prop] instanceof Array) { | 
 |                             assert_array_equals(expectedResponse[prop], xhr.response[prop]) | 
 |                           }else{ | 
 |                             assert_equals(expectedResponse[prop], xhr.response[prop]) | 
 |                           } | 
 |                         } | 
 |                     }else{ | 
 |                         assert_equals(xhr.response, expectedResponse) // null comparison, basically | 
 |                     } | 
 |                     assert_equals(xhr.response, xhr.response, | 
 |                                   "Response should be cached") | 
 |                     test.done() | 
 |                 }) | 
 |             } | 
 |         } | 
 |         xhr.send(data) | 
 |       } | 
 |       // no data | 
 |       makeTest("", null, 'json response with no data: response property is null') | 
 |       // malformed | 
 |       makeTest('{"test":"foo"', null, 'json response with malformed data: response property is null') | 
 |       // real object | 
 |       var obj = {alpha:'a-z', integer:15003, negated:-20, b1:true, b2:false, myAr:['a', 'b', 'c', 1, 2, 3]} | 
 |       makeTest(JSON.stringify(obj), obj,  'JSON object roundtrip') | 
 |       makeTest('{"日本語":"にほんご"}', {"日本語":"にほんご"}, 'JSON roundtrip with Japanese text') | 
 |     </script> | 
 |   </body> | 
 | </html> |