Add integration tests for interacting with promises from native code.

components/script/dom/testbinding.rs

@@ -5,9 +5,10 @@
 // check-tidy: no specs after this line
 
 use core::nonzero::NonZero;
+use dom::bindings::callback::ExceptionHandling;
 use dom::bindings::codegen::Bindings::EventListenerBinding::EventListener;
 use dom::bindings::codegen::Bindings::FunctionBinding::Function;
-use dom::bindings::codegen::Bindings::TestBindingBinding;
+use dom::bindings::codegen::Bindings::TestBindingBinding::{self, SimpleCallback};
 use dom::bindings::codegen::Bindings::TestBindingBinding::{TestBindingMethods, TestDictionary};
 use dom::bindings::codegen::Bindings::TestBindingBinding::{TestDictionaryDefaults, TestEnum};
 use dom::bindings::codegen::UnionTypes;
@@ -20,7 +21,7 @@ use dom::bindings::codegen::UnionTypes::{HTMLElementOrUnsignedLongOrStringOrBool
 use dom::bindings::codegen::UnionTypes::{StringOrLongSequence, StringOrStringSequence, StringSequenceOrUnsignedLong};
 use dom::bindings::codegen::UnionTypes::{StringOrUnsignedLong, StringOrBoolean, UnsignedLongOrBoolean};
 use dom::bindings::error::Fallible;
-use dom::bindings::global::GlobalRef;
+use dom::bindings::global::{GlobalRef, global_root_from_context};
 use dom::bindings::js::Root;
 use dom::bindings::mozmap::MozMap;
 use dom::bindings::num::Finite;
@@ -29,6 +30,7 @@ use dom::bindings::str::{ByteString, DOMString, USVString};
 use dom::bindings::weakref::MutableWeakRef;
 use dom::blob::{Blob, BlobImpl};
 use dom::promise::Promise;
+use dom::promisenativehandler::{PromiseNativeHandler, Callback};
 use dom::url::URL;
 use js::jsapi::{HandleObject, HandleValue, JSContext, JSObject};
 use js::jsapi::{JS_NewPlainObject, JS_NewUint8ClampedArray};
@@ -649,8 +651,44 @@ impl TestBindingMethods for TestBinding {
     fn ReceiveAnyMozMap(&self) -> MozMap<JSVal> { MozMap::new() }
 
     #[allow(unrooted_must_root)]
-    fn ReturnPromise(&self) -> Rc<Promise> {
+    fn ReturnResolvedPromise(&self, cx: *mut JSContext, v: HandleValue) -> Fallible<Rc<Promise>> {
-        Promise::new(self.global().r())
+        Promise::Resolve(self.global().r(), cx, v)
+    }
+
+    #[allow(unrooted_must_root)]
+    fn ReturnRejectedPromise(&self, cx: *mut JSContext, v: HandleValue) -> Fallible<Rc<Promise>> {
+        Promise::Reject(self.global().r(), cx, v)
+    }
+
+    #[allow(unrooted_must_root)]
+    fn PromiseNativeHandler(&self,
+                            resolve: Option<Rc<SimpleCallback>>,
+                            reject: Option<Rc<SimpleCallback>>) -> Rc<Promise> {
+        let global = self.global();
+        let handler = PromiseNativeHandler::new(global.r(),
+                                                resolve.map(|r| SimpleHandler::new(r)),
+                                                reject.map(|r| SimpleHandler::new(r)));
+        let p = Promise::new(global.r());
+        p.append_native_handler(&handler);
+        return p;
+
+        #[derive(JSTraceable, HeapSizeOf)]
+        struct SimpleHandler {
+            #[ignore_heap_size_of = "Rc has unclear ownership semantics"]
+            handler: Rc<SimpleCallback>,
+        }
+        impl SimpleHandler {
+            fn new(callback: Rc<SimpleCallback>) -> Box<Callback> {
+                box SimpleHandler { handler: callback }
+            }
+        }
+        impl Callback for SimpleHandler {
+            #[allow(unsafe_code)]
+            fn callback(&self, cx: *mut JSContext, v: HandleValue) {
+                let global = unsafe { global_root_from_context(cx) };
+                let _ = self.handler.Call_(&global.r(), v, ExceptionHandling::Report);
+            }
+        }
     }
 
     #[allow(unrooted_must_root)]

components/script/dom/webidls/TestBinding.webidl

@@ -508,14 +508,20 @@ interface TestBinding {
   [Func="TestBinding::condition_satisfied"]
   const unsigned short funcControlledConstEnabled = 0;
 
-  Promise<DOMString> returnPromise();
+  [Throws]
+  Promise<any> returnResolvedPromise(any value);
+  [Throws]
+  Promise<any> returnRejectedPromise(any value);
   readonly attribute Promise<boolean> promiseAttribute;
   void acceptPromise(Promise<DOMString> string);
   void acceptNullablePromise(Promise<DOMString>? string);
+  Promise<any> promiseNativeHandler(SimpleCallback? resolve, SimpleCallback? reject);
 
   void panic();
 };
 
+callback SimpleCallback = void(any value);
+
 partial interface TestBinding {
   [Pref="dom.testable_crash.enabled"]
   void crashHard();

tests/wpt/mozilla/meta/MANIFEST.json

@@ -7176,6 +7176,12 @@
             "url": "/_mozilla/mozilla/preserve_wrapper_callback.html"
           }
         ],
+        "mozilla/promise.html": [
+          {
+            "path": "mozilla/promise.html",
+            "url": "/_mozilla/mozilla/promise.html"
+          }
+        ],
         "mozilla/prototypes.html": [
           {
             "path": "mozilla/prototypes.html",

tests/wpt/mozilla/meta/mozilla/promise.html.ini

@@ -0,0 +1,3 @@
+[promise.html]
+  type: testharness
+  prefs: [dom.testbinding.enabled:true]

tests/wpt/mozilla/tests/mozilla/promise.html

@@ -0,0 +1,40 @@
+<!doctype html>
+<meta charset=utf-8>
+<title></title>
+<script src=/resources/testharness.js></script>
+<script src=/resources/testharnessreport.js></script>
+<script>
+  promise_test(function() {
+      var t = new TestBinding;
+      return t.returnResolvedPromise('success')
+          .then(function(s) {
+              assert_equals(s, 'success');
+          });
+  }, 'Resolve callback gets argument');
+
+  promise_test(function(test) {
+      var t = new TestBinding;
+      return t.returnRejectedPromise('success')
+          .then(test.unreached_func())
+          .catch(function(s) {
+              assert_equals(s, 'success');
+          });
+  }, 'Reject callback gets argument');
+
+  promise_test(function(test) {
+      var t = new TestBinding;
+      var p = t.promiseNativeHandler(function(v) {
+          assert_equals(v, 'success');
+      }, null);
+      return Promise.resolve('success').then(p);
+  }, 'Native resolve callback gets argument');
+
+  promise_test(function(test) {
+      var t = new TestBinding;
+      var p = t.promiseNativeHandler(null, function(v) {
+          assert_equals(v, 'success');
+      });
+      p.then(test.unreached_func());
+      return Promise.resolve('success').then(p);
+  }, 'Native resolve callback gets argument');
+</script>