Add failing spec for rejected remote promise

spec/api-ipc-spec.js

@@ -106,6 +106,22 @@ describe('ipc module', function () {
         done()
       })
     })
+
+    it('handles rejections via catch(onRejected)', function (done) {
+      var promise = remote.require(path.join(fixtures, 'module', 'rejected-promise.js'))
+      promise.reject(Promise.resolve(1234)).catch(function (error) {
+        assert.equal(error.message, 'rejected')
+        done()
+      })
+    })
+
+    it('handles rejections via then(onFulfilled, onRejected)', function (done) {
+      var promise = remote.require(path.join(fixtures, 'module', 'rejected-promise.js'))
+      promise.reject(Promise.resolve(1234)).then(function () {}, function (error) {
+        assert.equal(error.message, 'rejected')
+        done()
+      })
+    })
   })
 
   describe('remote webContents', function () {

spec/fixtures/module/rejected-promise.js

@@ -0,0 +1,5 @@
+exports.reject = function (promise) {
+  return promise.then(function () {
+    throw Error('rejected')
+  })
+}