Implement redirect() API for Fetch Response

LayoutTests/http/tests/fetch/script-tests/response.js

Index: LayoutTests/http/tests/fetch/script-tests/response.js
diff --git a/LayoutTests/http/tests/fetch/script-tests/response.js b/LayoutTests/http/tests/fetch/script-tests/response.js
index 46dde766908b3a85a8c2428812c88695792c76b0..4710ec174b393eab25a44ffb9262244f1a617a57 100644
--- a/LayoutTests/http/tests/fetch/script-tests/response.js
+++ b/LayoutTests/http/tests/fetch/script-tests/response.js
@@ -117,8 +117,46 @@ test(function() {
                       function() {
                         new Response(new Blob(), {status: status});
                       },
-                      'new Response with status = ' + status + ' should throw');
+                      'new Response with status = ' + status +
+                      'should throw');
       });
+
+    [300, 0, 304, 305, 306, 309, 500].forEach(function(status) {
+        assert_throws({name: 'RangeError'},
+                      function() {
+                        Response.redirect('https://www.example.com/test.html',
+                                          status);
+                      },
+                      'Response.redirect() with invalid status = ' + status +
+                      'should throw');
+      });
+
+    assert_throws(
+      {name: 'TypeError'},
+      function() {
+        Response.redirect('https://', 301);
+      },
+      'Response.redirect() with invalid URL https://' +
+      'status as 301 should throw');

[hiroshige, 2015/04/27 11:47:25]

nit: ' and status 301 should throw'.
- space after https://
- inserting "and"

[shiva.jm, 2015/04/28 06:06:48]

Done.

+
+    INVALID_URLS.forEach(function(url) {
+        assert_throws(
+          {name: 'TypeError'},
+          function() {
+            Response.redirect(url);
+          },
+          'Response.redirect() with invalid URL' + url +

[hiroshige, 2015/04/27 11:47:25]

nit: 'Response.redirect() with invalid URL ' + url +
' and default status value should throw'.
- spaces before/after url
- inserting "and"

[shiva.jm, 2015/04/28 06:06:48]

Done.

+          'default status value should throw');
+      });
+
+    assert_throws(
+      {name: 'TypeError'},
+      function() {
+        Response.redirect('https://', 300);
+      },
+      'Response.redirect() with invalid URL https://' +
+      'invalid status 300 should throw');

[hiroshige, 2015/04/27 11:47:25]

nit: ' and invalid status 300 should throw TypeError'
- spaces before/after url
- inserting "and"
- inserting "TypeError" (because this shouldn't throw RangeError)

[shiva.jm, 2015/04/28 06:06:48]

Done.

+
     [200, 300, 400, 500, 599].forEach(function(status) {
         var response = new Response(new Blob(), {status: status});
         assert_equals(response.status, status, 'Response.status should match');
@@ -425,4 +463,32 @@ promise_test(function(t) {
       });
   }, 'Read after text()');
 
+promise_test(function() {
+    var response = Response.redirect('https://www.example.com/test.html');
+    return response.text().then(function(text) {
+        assert_equals(response.status, 302,
+                      'default value of status is always 302');
+        assert_equals(response.headers.get('location'),
+                      'https://www.example.com/test.html',
+                      'Location header should be correct absoulte URL');
+        assert_throws({name: 'TypeError'},
+                      function() {
+                        response.headers.append('Accept-Language', 'test');
+                      },
+                      'response.headers must throw since guard is immutable');
+      });
+  }, 'Response.redirect() with default status value');
+
+promise_test(function() {
+    var response = Response.redirect('https://www.example.com/test.html',
+                                     301);
+    return response.text().then(function(text) {
+        assert_equals(response.status, 301,
+                      'value of status is 301');
+        assert_equals(response.headers.get('location'),
+                      'https://www.example.com/test.html',
+                      'Location header should be correct absoulte URL');
+      });
+  }, 'Response.redirect() with 301');
+
 done();