feat: Track timezone changes as breadcrumbs

CHANGELOG.md

@@ -6,6 +6,7 @@
 
 - Add main thread ID to profiling payload (#1918)
 - Add App Hangs tracking (#1906)
+- Track timezone changes as breadcrumbs (#1930)
 
 ### Fixes
 

Sentry.xcodeproj/project.pbxproj

@@ -1583,7 +1583,9 @@
 				63AA75921EB8AEDB00D153DE /* Tests */,
 				7D826E3C2390840E00EED93D /* Utils */,
 			);
+			indentWidth = 4;
 			sourceTree = "<group>";
+			tabWidth = 4;
 		};
 		6327C5D41EB8A783004E799B /* Products */ = {
 			isa = PBXGroup;
@@ -1718,8 +1720,10 @@
 				63FE6FB920DA4C1000CDBAE8 /* SentryCrash */,
 				63AA75C61EB8B06100D153DE /* Sentry */,
 			);
+			indentWidth = 4;
 			path = Sources;
 			sourceTree = "<group>";
+			tabWidth = 4;
 		};
 		63AA75921EB8AEDB00D153DE /* Tests */ = {
 			isa = PBXGroup;
@@ -1730,8 +1734,10 @@
 				63AA76AA1EB9D5CD00D153DE /* Configuration */,
 				63AA75931EB8AEDB00D153DE /* SentryTests */,
 			);
+			indentWidth = 4;
 			path = Tests;
 			sourceTree = "<group>";
+			tabWidth = 4;
 		};
 		63AA75931EB8AEDB00D153DE /* SentryTests */ = {
 			isa = PBXGroup;

Sources/Sentry/SentrySystemEventBreadcrumbs.m

@@ -19,6 +19,8 @@ - (void)start
     [SentryLog logWithMessage:@"NO iOS -> [SentrySystemEventsBreadcrumbs.start] does nothing."
                      andLevel:kSentryLevelDebug];
 #endif
+
+    [self initTimezoneObserver];
 }
 
 - (void)stop
@@ -160,6 +162,16 @@ - (void)initKeyboardVisibilityObserver
                         object:nil];
 }
 
+- (void)initScreenshotObserver
+{
+    // it's only about the action, but not the SS itself
+    [[NSNotificationCenter defaultCenter] addObserver:self
+                                             selector:@selector(systemEventTriggered:)
+                                                 name:UIApplicationUserDidTakeScreenshotNotification
+                                               object:nil];
+}
+#endif
+
 - (void)systemEventTriggered:(NSNotification *)notification
 {
     SentryBreadcrumb *crumb = [[SentryBreadcrumb alloc] initWithLevel:kSentryLevelInfo
@@ -169,14 +181,13 @@ - (void)systemEventTriggered:(NSNotification *)notification
     [SentrySDK addBreadcrumb:crumb];
 }
 
-- (void)initScreenshotObserver
+- (void)initTimezoneObserver
 {
-    // it's only about the action, but not the SS itself
+    // Posted when the timezone of the device changed
     [[NSNotificationCenter defaultCenter] addObserver:self
                                              selector:@selector(systemEventTriggered:)
-                                                 name:UIApplicationUserDidTakeScreenshotNotification
+                                                 name:NSSystemTimeZoneDidChangeNotification
                                                object:nil];
 }
-#endif
 
 @end

Tests/SentryTests/Integrations/Breadcrumbs/SentrySystemEventBreadcrumbsTest.swift

@@ -218,6 +218,14 @@ class SentrySystemEventBreadcrumbsTest: XCTestCase {
         NotificationCenter.default.post(Notification(name: UIApplication.userDidTakeScreenshotNotification))
         assertBreadcrumbAction(scope: scope, action: "UIApplicationUserDidTakeScreenshotNotification")
     }
+
+    func testTimezoneChangeBreadcrumb() {
+        let scope = Scope()
+        sut = fixture.getSut(scope: scope, currentDevice: nil)
+
+        NotificationCenter.default.post(Notification(name: NSSystemTimeZoneDidChangeNotification))
+        assertBreadcrumbAction(scope: scope, action: "NSSystemTimeZoneDidChangeNotification")
+    }
 
     private func assertBreadcrumbAction(scope: Scope, action: String) {
         let ser = scope.serialize()