Add WPT tests for blocking 206 response. r=bkelly.

Upstreamed from https://bugzilla.mozilla.org/show_bug.cgi?id=1264181

service-workers/cache-storage/script-tests/cache-add.js

@@ -83,6 +83,26 @@ cache_test(function(cache) {
         });
   }, 'Cache.add with request with null body (not consumed)');
 
+cache_test(function(cache, test) {
+    return assert_promise_rejects(
+      test,
+      new TypeError(),
+      cache.add('../resources/fetch-status.py?status=206'),
+      'Cache.add should reject on partial response');
+  }, 'Cache.add with 206 response');
+
+cache_test(function(cache, test) {
+    var urls = ['../resources/fetch-status.py?status=206',
+                '../resources/fetch-status.py?status=200'];
+    var requests = urls.map(function(url) {
+        return new Request(url);
+      });
+    return promise_rejects(
+      new TypeError(),
+      cache.addAll(requests),
+      'Cache.addAll should reject with TypeError if any request fails');
+  }, 'Cache.addAll with 206 response');
+
 cache_test(function(cache, test) {
     return promise_rejects(
       test,
@@ -91,6 +111,7 @@ cache_test(function(cache, test) {
       'Cache.add should reject if response is !ok');
   }, 'Cache.add with request that results in a status of 404');
 
+
 cache_test(function(cache, test) {
     return promise_rejects(
       test,

service-workers/cache-storage/script-tests/cache-put.js

@@ -102,6 +102,19 @@ cache_test(function(cache) {
         });
   }, 'Cache.put with an empty response body');
 
+cache_test(function(cache) {
+    var request = new Request(test_url);
+    var response = new Response('', {
+        status: 206,
+        headers: [['Content-Type', 'text/plain']]
+      });
+
+    return assert_promise_rejects(
+      cache.put(request, response),
+      new TypeError(),
+      'Cache.put should reject 206 Responses with a TypeError.');
+  }, 'Cache.put with 206 response');
+
 cache_test(function(cache) {
     var test_url = new URL('../resources/fetch-status.py?status=500', location.href).href;
     var request = new Request(test_url);