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Mocking User Notifications

Detox supports mocking user notifications.

Note: The mocking mechanism will not mimic the UI of a user notification. Instead, it will only simulate a user interaction with the notification - namely, the "opening" of it (equivalent to a user's tap/swipe on it in the notification center).

Mocking App Launch With a Notification

launchApp() with custom parameters (i.e. userNotification) will trigger the mocking mechanism.

await device.launchApp({newInstance: true, userNotification: notification});

Example

describe('Launch with push notification', () => {
  it('should handle the notification', async () => {
    await device.launchApp({
      newInstance: true,
      userNotification: userNotificationPushTrigger,
    });
    await expect(element(by.text('From push'))).toBeVisible();
  });
});

Mocking Notification Reception on a Running App

Use the sendUserNotification() method to send notification to running app. Notifications can be sent to an active or a background app.

Note: while the name sendUserNotification() is not very idiomatic on Android, as notification data is not "sent" to apps (rather, it is bundled into an Activity/Service launch Intent as Intent-extras), this unified API is used, for the time being, for both platforms equivalently. With plans of a more extensive support for Android, we estimate it would be deprecated when the time comes.

await device.sendUserNotification(notification);

Example:

describe('Foreground user notifications', () => {
  it('should handle the local notification from inside the app', async () => {
    await device.launchApp();
    await device.sendUserNotification(localNotification);
    await expect(element(by.text('from local notification'))).toBeVisible();
   });
});

Notification JSON Format

User notifications are passed as JSON objects to Detox. The JSON object needs to provide some required data, but can also provide an additional, optional payload.

Mind the major difference here between the two platforms. While on iOS many types of data fields are applicable, Android is very loosely defined - with support for just free-form user data in the payload field.

Key Required Value Type Platform Description
trigger Yes Object iOS The conditions that trigger the delivery of the notification. See the Triggers section below.
title No String iOS A short description of the reason for the alert.
subtitle No String iOS A secondary description of the reason for the alert.
body No String iOS The body of the notification.
badge No Integer iOS The number to display as the app’s icon badge.
payload iOS: No
Android: Yes		 Object iOS & Android An object of custom information associated with the notification.
Android: see full description below
category No String iOS The identifier of the app-defined category object.
content-available No Integer iOS Include this key with a value of 1 to configure a silent notification.
user-text No String iOS The text response provided by the user.
action-identifier No String iOS The identifier for the action that the user selected.

Triggers (iOS-only)

Triggers are objects representing the trigger.

Key Required Value Type Description
type Yes String The conditions that trigger the delivery of the notification. See the Trigger Types section below.
repeats No Boolean Indicates whether the event repeats. Only used for calendar, timeInterval and location trigger types.
timeInterval Yes for timeInterval trigger type Number The time interval used to create the trigger.
date-components Yes for calendar trigger type Object The date components used to construct this object. See the Date Components section below.
region Yes for location trigger type Object The region used to determine when the notification is sent. See the Region section below.

Trigger Types

There are four types of triggers supported by Detox at this time:

  • push
  • calendar
  • timeInterval
  • location

For convenience, these trigger types are provided as constants in DetoxConstants:

const DetoxConstants = require('detox').DetoxConstants;

const userNotification = {
	"trigger": {
		"type": DetoxConstants.userNotificationTriggers.push
	},
	...
}

Date Components (iOS-only)

Key Required Value Type Description
era No Integer The number of era units for the receiver.
year No Integer The number of year units for the receiver.
month No Integer The number of month units for the receiver.
day No Integer The number of day units for the receiver.
hour No Integer The number of hour units for the receiver.
minute No Integer The number of minute units for the receiver.
second No Integer The number of second units for the receiver.
weekday No Integer The number of the weekday unit for the receiver.
weekdayOrdinal No Integer The ordinal number of weekday units for the receiver.
quarter No Integer The number of quarters for the receiver.
weekOfMonth No Integer The week number of the month for the receiver.
leapMonth No Boolean Indicates whether the month is a leap month.

Region (iOS-only)

Key Required Value Type Description
center Yes Object The center point of the geographic area. See the Coordinate section below.
radius Yes Number The radius (measured in meters) that defines the geographic area’s outer boundary.
notifyOnEntry No Boolean Indicates that notifications are generated upon entry into the region.
notifyOnExit No Boolean Indicates that notifications are generated upon exit from the region.

Coordinate (iOS-only)

Key Required Value Type Description
latitude Yes Number The latitude in degrees. Positive values indicate latitudes north of the equator. Negative values indicate latitudes south of the equator.
longitude Yes Number The longitude in degrees. Measurements are relative to the zero meridian, with positive values extending east of the meridian and negative values extending west of the meridian.

Payload

On Android, the content will be available via the activity's getIntent() API, inside the intent's extra bundle. Under some limitations, that includes data-cascading so as to provide comprehensive support for Javascript's advanced object-hierarchy capabilities as much as possible. As an example, consider this payload:

  const userNotification = {
    payload: {
      userData: 'userDataValue',
      userDataNum: 111.2,
      userDataFlag: true,
      userDataArray: ['rock', 'paper', 'scissors'],
      userDataObj: {
        cascadedKey: 'cascadedValue'
      },
    },
  };

The outcome on the native side will be such that all of these conditions evaluate to true:

activity.getIntent().getStringExtra("userData") == "userDataValue";
activity.getIntent().getDoubleExtra("userDataNum") == 111.2;
activity.getIntent().getBooleanExtra("userDataFlag") == true;
activity.getIntent().getStringArrayExtra("userDataArray")[0] == "rock";
activity.getIntent().getBundleExtra("userDataObj").getString("cascadedKey") == "cascadedValue";

Handling at Runtime

Note that on Android, data delivered through an intent at runtime, is typically received in your activity's onNewIntent callback. Be sure to consider what should be done in order to handle this type of a use case in your app: Namely, that setIntent() should be called in order for the data to be later available in your app through getIntent(), as explained earlier.

This isn't related to Detox in particular, and is set here simply to help you consider all the use cases in your app so that tests coverage would be optimal.

Examples

  1. Calendar Trigger
  2. Location Trigger
  3. Time Interval Trigger
  4. Push Trigger