[Fetch API] Implement Request.formData and Response.formData.

third_party/WebKit/LayoutTests/http/tests/fetch/script-tests/body-mixin.js

 if (self.importScripts) {
   importScripts('../resources/fetch-test-helpers.js');
   importScripts('/streams/resources/rs-utils.js');
 }
 
 function isLocked(stream) {
   try {
     var reader = stream.getReader();
     reader.releaseLock();
     return false;
@@ skipping 85 matching lines @@
           assert_equals(blob.type, 'text/html');
         })
     }, 'BlobTest');
 
 promise_test(function(test) {
     var response;
     return fetch('/fetch/resources/doctype.html')
       .then(function(res) {
           response = res;
           assert_false(response.bodyUsed);
+          var p = response.formData();
+          assert_true(response.bodyUsed);
+          assert_true(isLocked(response.body));
+          return p;
+        })
+      .then(
+        test.unreached_func('formData() must fail'),

[yhirano, 2016/09/26 10:59:33]

Please use unreached_fulfillment.

[e_hakkinen, 2016/09/28 15:15:04]

Done.

+        function(e) {
+          assert_true(isLocked(response.body));
+          assert_equals(e.name, 'TypeError', 'expected MIME type error');
+        })
+    }, 'FormDataFailedTest');
+
+promise_test(function(test) {
+    var response;
+    return fetch('/fetch/resources/doctype.html')
+      .then(function(res) {
+          response = res;
+          assert_false(response.bodyUsed);
           var p = response.json();
           assert_true(response.bodyUsed);
           assert_true(isLocked(response.body));
           return p;
         })
       .then(
         test.unreached_func('json() must fail'),
         function(e) {
           assert_true(isLocked(response.body));
           assert_equals(e.name, 'SyntaxError', 'expected JSON error');
@@ skipping 122 matching lines @@
     var res = new Response('');
     res.body.cancel();
     return res.blob().then(unreached_fulfillment(t), e => {
         assert_equals(e.name, 'TypeError');
       });
   }, 'Used => blob');
 
 promise_test(t => {
     var res = new Response('');
     res.body.cancel();
+    return res.formData().then(unreached_fulfillment(t), e => {
+        assert_equals(e.name, 'TypeError');
+      });
+  }, 'Used => formData');
+
+promise_test(t => {
+    var res = new Response('');
+    res.body.cancel();
     return res.json().then(unreached_fulfillment(t), e => {
         assert_equals(e.name, 'TypeError');
       });
   }, 'Used => json');
 
 promise_test(t => {
     var res = new Response('');
     res.body.cancel();
     return res.text().then(unreached_fulfillment(t), e => {
         assert_equals(e.name, 'TypeError');
@@ skipping 15 matching lines @@
     const reader = res.body.getReader();
     return res.blob().then(unreached_fulfillment(t), e => {
         reader.releaseLock();
         assert_equals(e.name, 'TypeError');
       });
   }, 'Locked => blob');
 
 promise_test(t => {
     var res = new Response('');
     const reader = res.body.getReader();
+    return res.formData().then(unreached_fulfillment(t), e => {
+        reader.releaseLock();
+        assert_equals(e.name, 'TypeError');
+      });
+  }, 'Locked => formData');
+
+promise_test(t => {
+    var res = new Response('');
+    const reader = res.body.getReader();
     return res.json().then(unreached_fulfillment(t), e => {
         reader.releaseLock();
         assert_equals(e.name, 'TypeError');
       });
   }, 'Locked => json');
 
 promise_test(t => {
     var res = new Response('');
     const reader = res.body.getReader();
     return res.text().then(unreached_fulfillment(t), e => {
         reader.releaseLock();
         assert_equals(e.name, 'TypeError');
       });
   }, 'Locked => text');
 
 done();