feat: Add dismissal-date property to Live Activity notifications

doc/notification.markdown

@@ -112,6 +112,7 @@ This table shows the name of the setter, with the key-path of the underlying pro
 | `staleDate`                | `aps.staleDate`             | `Number`            |
 | `event`                    | `aps.event`                 | `String`            |
 | `contentState`             | `aps.content-state`         | `Object`            |
+| `dismissalDate`            | `aps.dismissal-date`        | `Number`            |
 | `mdm`                      | `mdm`                       | `String`            |
 
 When the notification is transmitted these properties will be added to the output before encoding.

lib/notification/apsProperties.js

@@ -113,6 +113,12 @@ module.exports = {
     }
   },
 
+  set dismissalDate(value) {
+    if (typeof value === 'number' || value === undefined) {
+      this.aps['dismissal-date'] = value;
+    }
+  },
+
   set contentAvailable(value) {
     if (value === true || value === 1) {
       this.aps['content-available'] = 1;

lib/notification/index.js

@@ -54,6 +54,7 @@ Notification.prototype = require('./apsProperties');
   'staleDate',
   'event',
   'contentState',
+  'dismissalDate'
 ].forEach(propName => {
   const methodName = 'set' + propName[0].toUpperCase() + propName.slice(1);
   Notification.prototype[methodName] = function (value) {

test/notification/apsProperties.js

@@ -858,6 +858,32 @@ describe('Notification', function () {
       });
     });
 
+    describe('dismissal-date', function () {
+      it('defaults to undefined', function () {
+        expect(compiledOutput()).to.not.have.nested.property('aps.dismissal-date');
+      });
+
+      it('can be set to a number', function () {
+        note.dismissalDate = 123456;
+
+        expect(compiledOutput()).to.have.nested.property('aps.dismissal-date', 123456);
+      });
+
+      it('can be set to undefined', function () {
+        note.dismissalDate = 123456;
+        note.dismissalDate = undefined;
+
+        expect(compiledOutput()).to.not.have.nested.property('aps.dismissal-date');
+      });
+
+      describe('setDismissalDate', function () {
+        it('is chainable', function () {
+          expect(note.setDismissalDate(123456)).to.equal(note);
+          expect(compiledOutput()).to.have.nested.property('aps.dismissal-date', 123456);
+        });
+      });
+    });
+
     describe('timestamp', function () {
       it('defaults to undefined', function () {
         expect(compiledOutput()).to.not.have.nested.property('aps.timestamp');