Include stack traces in unhandled promise rejection messages

lib/jasmine-core/jasmine.js

@@ -3855,7 +3855,12 @@ getJasmineRequireObj().GlobalErrors = function(j$) {
         global.onerror = onerror;
 
         var browserRejectionHandler = function browserRejectionHandler(event) {
-          onerror('Unhandled Rejection: ' + event.reason);
+          if (j$.isError_(event.reason)) {
+            event.reason.jasmineMessage = 'Unhandled promise rejection: ' + event.reason;
+            onerror(event.reason);
+          } else {
+            onerror('Unhandled promise rejection: ' + event.reason);
+          }
         };
 
         if (global.addEventListener) {

spec/core/GlobalErrorsSpec.js

@@ -194,33 +194,72 @@ describe('GlobalErrors', function() {
     );
   });
 
-  it('reports unhandledRejection in browser', function() {
-    var fakeGlobal = {
-        addEventListener: jasmine.createSpy('addEventListener'),
-        removeEventListener: jasmine.createSpy('removeEventListener'),
-        onerror: jasmine.createSpy('onerror')
-      },
-      handler = jasmine.createSpy('errorHandler'),
-      errors = new jasmineUnderTest.GlobalErrors(fakeGlobal);
+  describe('Reporting unhandled promise rejections in the browser', function() {
+    it('subscribes and unsubscribes from the unhandledrejection event', function() {
+      var fakeGlobal = jasmine.createSpyObj('globalErrors', [
+          'addEventListener',
+          'removeEventListener',
+          'onerror'
+        ]),
+        errors = new jasmineUnderTest.GlobalErrors(fakeGlobal);
 
-    errors.install();
-    expect(fakeGlobal.addEventListener).toHaveBeenCalledWith(
-      'unhandledrejection',
-      jasmine.any(Function)
-    );
+      errors.install();
+      expect(fakeGlobal.addEventListener).toHaveBeenCalledWith(
+        'unhandledrejection',
+        jasmine.any(Function)
+      );
 
-    errors.pushListener(handler);
+      var addedListener = fakeGlobal.addEventListener.calls.argsFor(0)[1];
+      errors.uninstall();
 
-    var addedListener = fakeGlobal.addEventListener.calls.argsFor(0)[1];
-    addedListener({ reason: new Error('bar') });
+      expect(fakeGlobal.removeEventListener).toHaveBeenCalledWith(
+        'unhandledrejection',
+        addedListener
+      );
+    });
 
-    expect(handler).toHaveBeenCalledWith('Unhandled Rejection: Error: bar');
+    it('reports rejections whose reason is a string', function() {
+      var fakeGlobal = jasmine.createSpyObj('globalErrors', [
+          'addEventListener',
+          'removeEventListener',
+          'onerror'
+        ]),
+        handler = jasmine.createSpy('errorHandler'),
+        errors = new jasmineUnderTest.GlobalErrors(fakeGlobal);
 
-    errors.uninstall();
+      errors.install();
+      errors.pushListener(handler);
 
-    expect(fakeGlobal.removeEventListener).toHaveBeenCalledWith(
-      'unhandledrejection',
-      addedListener
-    );
+      var addedListener = fakeGlobal.addEventListener.calls.argsFor(0)[1];
+      addedListener({ reason: 'nope' });
+
+      expect(handler).toHaveBeenCalledWith('Unhandled promise rejection: nope');
+    });
+
+    it('reports rejections whose reason is an Error', function() {
+      var fakeGlobal = jasmine.createSpyObj('globalErrors', [
+          'addEventListener',
+          'removeEventListener',
+          'onerror'
+        ]),
+        handler = jasmine.createSpy('errorHandler'),
+        errors = new jasmineUnderTest.GlobalErrors(fakeGlobal);
+
+      errors.install();
+      errors.pushListener(handler);
+
+      var addedListener = fakeGlobal.addEventListener.calls.argsFor(0)[1];
+      var reason = new Error('bar');
+      addedListener({ reason: reason });
+
+      var expectedError = Object.create(reason);
+      expectedError.jasmineMessage = expect(handler).toHaveBeenCalledWith(
+        jasmine.objectContaining({
+          jasmineMessage: 'Unhandled promise rejection: Error: bar',
+          message: reason.message,
+          stack: reason.stack
+        })
+      );
+    });
   });
 });

src/core/GlobalErrors.js

@@ -64,7 +64,13 @@ getJasmineRequireObj().GlobalErrors = function(j$) {
         global.onerror = onerror;
 
         var browserRejectionHandler = function browserRejectionHandler(event) {
-          onerror('Unhandled Rejection: ' + event.reason);
+          if (j$.isError_(event.reason)) {
+            event.reason.jasmineMessage =
+              'Unhandled promise rejection: ' + event.reason;
+            onerror(event.reason);
+          } else {
+            onerror('Unhandled promise rejection: ' + event.reason);
+          }
         };
 
         if (global.addEventListener) {