Add additional app launch scenarios for OOM tracking

JRFMemoryNoodler/JRFMemoryNoodler.h

@@ -34,4 +34,20 @@ typedef BOOL (^JRFCrashDetector)();
 + (void)beginMonitoringMemoryEventsWithHandler:(nonnull JRFOutOfMemoryEventHandler)handler
                                  crashDetector:(nullable JRFCrashDetector)crashDetector;
 
+
+/**
+  You should call this when your application receives a silent push notification. This will allow JRFMemoryNoodler to track an application launch that occurred from a silent push notification.
+  Call this if your application is not in the foreground and during:
+  `- (void)application:(UIApplication *)application didReceiveRemoteNotification:(NSDictionary *)userInfo fetchCompletionHandler:(void (^)(UIBackgroundFetchResult result))fetchCompletionHandler`
+ */
++ (void)markSilentPushNotificationEvent;
+
+/**
+ You should call this when your application wakes up to perform work in the background. This will allow JRFMemoryNoodler to track an application launch that occurred from a silent push notification.
+ Call this during:
+ `- (void)application:(UIApplication *)application performFetchWithCompletionHandler:(void (^)(UIBackgroundFetchResult result))fetchCompletionHandler`
+ */
++ (void)markBackgroundFetchEvent;
+
 @end
+

JRFMemoryNoodler/JRFMemoryNoodler.m

@@ -18,6 +18,9 @@
 NSString *JRFAppWasInBackgroundKey = @"JRFAppWasInBackgroundKey";
 NSString *JRFAppDidCrashKey = @"JRFAppDidCrashKey";
 NSString *JRFPreviousOSVersionKey = @"JRFPreviousOSVersionKey";
+NSString *JRFSilentPushNotificationKey = @"JRFSilentPushNotificationKey";
+NSString *JRFBackgroundFetchKey = @"JRFBackgroundFetchKey";
+
 static char *intentionalQuitPathname;
 
 @implementation JRFMemoryNoodler
@@ -47,11 +50,14 @@ + (void)beginMonitoringMemoryEventsWithHandler:(JRFOutOfMemoryEventHandler)handl
         // A file exists at the path, we had an intentional quit
         didIntentionallyQuit = YES;
     }
+
     BOOL didCrash = detector();
     BOOL didTerminate = [defaults boolForKey:JRFAppWasTerminatedKey];
     BOOL didUpgradeApp = ![[self currentBundleVersion] isEqualToString:[self previousBundleVersion]];
     BOOL didUpgradeOS = ![[self currentOSVersion] isEqualToString:[self previousOSVersion]];
-    if (!(didIntentionallyQuit || didCrash || didTerminate || didUpgradeApp || didUpgradeOS)) {
+    BOOL didReceiveSilentPushNotification = [[NSUserDefaults standardUserDefaults] boolForKey:JRFSilentPushNotificationKey];
+    BOOL didBackgroundFetch = [[NSUserDefaults standardUserDefaults] boolForKey:JRFBackgroundFetchKey];
+    if (!(didIntentionallyQuit || didCrash || didTerminate || didUpgradeApp || didUpgradeOS || didReceiveSilentPushNotification || didBackgroundFetch)) {
         if (handler) {
             BOOL wasInBackground = [[NSUserDefaults standardUserDefaults] boolForKey:JRFAppWasInBackgroundKey];
             handler(!wasInBackground);
@@ -63,6 +69,8 @@ + (void)beginMonitoringMemoryEventsWithHandler:(JRFOutOfMemoryEventHandler)handl
     [defaults setBool:NO forKey:JRFAppWasTerminatedKey];
     [defaults setBool:NO forKey:JRFAppWasInBackgroundKey];
     [defaults setBool:NO forKey:JRFAppDidCrashKey];
+    [defaults setBool:NO forKey:JRFSilentPushNotificationKey];
+    [defaults setBool:NO forKey:JRFBackgroundFetchKey];
     [defaults synchronize];
     // Remove intentional quit file
     unlink(intentionalQuitPathname);
@@ -156,4 +164,16 @@ + (JRFCrashDetector)defaultCrashDetector {
     };
 }
 
+#pragma mark - Silent Push Notifications
+
++ (void)markSilentPushNotificationEvent {
+    [[NSUserDefaults standardUserDefaults] setBool:YES forKey:JRFSilentPushNotificationKey];
+}
+
+#pragma mark - Background Fetch Notifications
+
++ (void)markBackgroundFetchEvent {
+    [[NSUserDefaults standardUserDefaults] setBool:YES forKey:JRFBackgroundFetchKey];
+}
+
 @end

JRFMemoryNoodlerTests/JRFMemoryNoodlerTests.m

@@ -49,6 +49,16 @@ - (void)testBackgroundingTracksProperly {
     [self checkMemoryNoodlerWithExpectation:NO shouldBeInForeground:NO didCrash:YES];
 }
 
+- (void)testSilentPushNotificationDoesNotTriggerOutOfMemoryWarning {
+    [[NSUserDefaults standardUserDefaults] setBool:YES forKey:@"JRFSilentPushNotificationKey"];
+    [self checkMemoryNoodlerWithExpectation:NO shouldBeInForeground:YES didCrash:NO];
+}
+
+- (void)testBackgroundFetchDoesNotTriggerOutOfMemoryWarning {
+    [[NSUserDefaults standardUserDefaults] setBool:YES forKey:@"JRFBackgroundFetchKey"];
+    [self checkMemoryNoodlerWithExpectation:NO shouldBeInForeground:YES didCrash:NO];
+}
+
 - (void)testIntentionalQuitPathNameIsStable {
     const char *pathname1 = [JRFPathUtilities intentionalQuitPathname];
     const char *pathname2 = [JRFPathUtilities intentionalQuitPathname];