Support mock updates on iOS (for testing)

Author: cooperka

ios/RNActivityRecognition.m

@@ -46,6 +46,15 @@ - (NSString *)generateAct: (CMMotionActivity *) activity {
     return @"UNKNOWN";
 }
 
+- (NSDictionary *)constantsToExport
+{
+    // Export a few common activity types to allow easier mocking.
+    return @{
+             @"IOS_STATIONARY": @"STATIONARY",
+             @"IOS_WALKING": @"WALKING",
+             @"IOS_AUTOMOTIVE": @"AUTOMOTIVE",
+             };
+}
 
 - (void)activityManager
 {
@@ -69,6 +78,19 @@ - (void)activityManager
     }
 }
 
+- (void)mockActivityManager:(NSTimer *)timer
+{
+    // Receive the data.
+    NSString* mockActivity = timer.userInfo;
+    
+    if (mockActivity == nil) mockActivity = @"UNKNOWN";
+    
+    dispatch_async(dispatch_get_main_queue(), ^{
+        _activityEvent = @{ mockActivity: @100 };
+        [self sendEventWithName:@"ActivityDetection" body: _activityEvent];
+    });
+}
+
 RCT_EXPORT_METHOD(startActivity:(float)time callback:(RCTResponseSenderBlock)callback)
 {
     NSString* errorMsg = checkActivityConfig(callback);
@@ -87,6 +109,24 @@ - (void)activityManager
     callback(@[[NSNull null]]);
 }
 
+RCT_EXPORT_METHOD(startMockedActivity:(float)time mockActivity:(NSString*)mockActivity callback:(RCTResponseSenderBlock)callback)
+{
+    _timeout = time/1000;
+    RCTLogInfo(@"Starting Mock Activity Detection");
+    _timer = [NSTimer scheduledTimerWithTimeInterval:_timeout
+                                              target:self selector:@selector(mockActivityManager:) userInfo:mockActivity repeats:YES];
+    
+    callback(@[[NSNull null]]);
+}
+
+RCT_EXPORT_METHOD(stopMockedActivity:(RCTResponseSenderBlock)callback)
+{
+    RCTLogInfo(@"Stopping Mock Activity Detection");
+    [_timer invalidate];
+    
+    callback(@[[NSNull null]]);
+}
+
 RCT_EXPORT_METHOD(stopActivity:(RCTResponseSenderBlock)callback)
 {
     RCTLogInfo(@"Stopping Activity Detection");

src/ActivityRecognition.ios.js

@@ -6,6 +6,10 @@ const emitter = new NativeEventEmitter(RNActivityRecognition);
 var subscription = null;
 
 var ActivityRecognition = {
+  'IOS_STATIONARY': RNActivityRecognition.IOS_STATIONARY,
+  'IOS_WALKING': RNActivityRecognition.IOS_WALKING,
+  'IOS_AUTOMOTIVE': RNActivityRecognition.IOS_AUTOMOTIVE,
+
   subscribe: function(success: Function) {
     subscription = emitter.addListener(
       "ActivityDetection",
@@ -21,11 +25,25 @@ var ActivityRecognition = {
     );
     return () => subscription.remove();
   },
+
   start: function(time: number) {
     return new Promise((resolve, reject) => {
       RNActivityRecognition.startActivity(time, logAndReject.bind(null, resolve, reject))
     })
   },
+
+  startMocked: function(time: number, mockActivity: string) {
+    return new Promise((resolve, reject) => {
+      RNActivityRecognition.startMockedActivity(time, mockActivity, logAndReject.bind(null, resolve, reject))
+    })
+  },
+
+  stopMocked: function() {
+    return new Promise((resolve, reject) => {
+      RNActivityRecognition.stopMockedActivity(logAndReject.bind(null, resolve, reject))
+    })
+  },
+
   stop: function() {
     return new Promise((resolve, reject) => {
       RNActivityRecognition.stopActivity(logAndReject.bind(null, resolve, reject))