Expose all properties of a GDTClock, better -hash and -isEqual impls

GoogleDataTransport.podspec

@@ -46,7 +46,6 @@ Shared library for iOS SDK data transport needs.
   s.test_spec 'Tests-Integration' do |test_spec|
     test_spec.requires_app_host = false
     test_spec.source_files = ['GoogleDataTransport/Tests/Integration/**/*.{h,m}'] + common_test_sources
-    test_spec.compiler_flags = '-DGDT_LOG_TRACE_ENABLED=1'
     test_spec.dependency 'GCDWebServer'
   end
 end

GoogleDataTransport/GoogleDataTransport/Classes/GDTClock.m

@@ -74,13 +74,7 @@ static int64_t UptimeInNanoseconds() {
 }
 
 // TODO: Consider adding a 'trustedTime' property that can be populated by the response from a BE.
-@implementation GDTClock {
-  /** The kernel boot time when this clock was created. */
-  int64_t _kernelBootTime;
-
-  /** The device uptime when this clock was created. */
-  int64_t _uptime;
-}
+@implementation GDTClock
 
 - (instancetype)init {
   self = [super init];
@@ -118,7 +112,8 @@ - (BOOL)isAfter:(GDTClock *)otherClock {
 }
 
 - (NSUInteger)hash {
-  return [@(_kernelBootTime) hash] ^ [@(_uptime) hash] ^ [@(_timeMillis) hash];
+  return [@(_kernelBootTime) hash] ^ [@(_uptime) hash] ^ [@(_timeMillis) hash] ^
+         [@(_timezoneOffsetSeconds) hash];
 }
 
 - (BOOL)isEqual:(id)object {

GoogleDataTransport/GoogleDataTransport/Classes/GDTStoredEvent.m

@@ -81,4 +81,15 @@ - (nullable instancetype)initWithCoder:(nonnull NSCoder *)aDecoder {
   return self;
 }
 
+- (BOOL)isEqual:(id)object {
+  NSAssert([object isKindOfClass:[self class]], @"You must compare like classes.");
+  GDTStoredEvent *other = (GDTStoredEvent *)object;
+  return [self hash] == [other hash];
+}
+
+- (NSUInteger)hash {
+  return
+      [_eventFileURL hash] ^ [_mappingID hash] ^ [_target hash] ^ [_clockSnapshot hash] ^ _qosTier;
+}
+
 @end

GoogleDataTransport/GoogleDataTransport/Classes/Public/GDTClock.h

@@ -27,6 +27,12 @@ NS_ASSUME_NONNULL_BEGIN
 /** The offset from UTC in seconds. */
 @property(nonatomic, readonly) int64_t timezoneOffsetSeconds;
 
+/** The kernel boot time when this clock was created. */
+@property(nonatomic, readonly) int64_t kernelBootTime;
+
+/** The device uptime when this clock was created. */
+@property(nonatomic, readonly) int64_t uptime;
+
 /** Creates a GDTClock object using the current time and offsets.
  *
  * @return A new GDTClock object representing the current time state.

GoogleDataTransport/Tests/Unit/GDTStoredEventTest.m

@@ -50,4 +50,39 @@ - (void)testNSSecureCoding {
   XCTAssertNil(storedEvent.customPrioritizationParams);
   XCTAssertNotNil(storedEvent.eventFileURL);
 }
+
+/** Tests equality between GDTStoredEvents. */
+- (void)testIsEqualAndHash {
+  GDTEvent *event1 = [[GDTEvent alloc] initWithMappingID:@"1018" target:1];
+  event1.clockSnapshot = [GDTClock snapshot];
+  [event1.clockSnapshot setValue:@(1553534573010) forKeyPath:@"timeMillis"];
+  [event1.clockSnapshot setValue:@(-25200) forKeyPath:@"timezoneOffsetSeconds"];
+  [event1.clockSnapshot setValue:@(1552576634359451) forKeyPath:@"kernelBootTime"];
+  [event1.clockSnapshot setValue:@(961141365197) forKeyPath:@"uptime"];
+  event1.qosTier = GDTEventQosDefault;
+  event1.customPrioritizationParams = @{@"customParam1" : @"aValue1"};
+  GDTStoredEvent *storedEvent1 =
+      [event1 storedEventWithFileURL:[NSURL fileURLWithPath:@"/tmp/fake.txt"]];
+
+  GDTEvent *event2 = [[GDTEvent alloc] initWithMappingID:@"1018" target:1];
+  event2.clockSnapshot = [GDTClock snapshot];
+  [event2.clockSnapshot setValue:@(1553534573010) forKeyPath:@"timeMillis"];
+  [event2.clockSnapshot setValue:@(-25200) forKeyPath:@"timezoneOffsetSeconds"];
+  [event2.clockSnapshot setValue:@(1552576634359451) forKeyPath:@"kernelBootTime"];
+  [event2.clockSnapshot setValue:@(961141365197) forKeyPath:@"uptime"];
+  event2.qosTier = GDTEventQosDefault;
+  event2.customPrioritizationParams = @{@"customParam1" : @"aValue1"};
+  GDTStoredEvent *storedEvent2 =
+      [event2 storedEventWithFileURL:[NSURL fileURLWithPath:@"/tmp/fake.txt"]];
+
+  XCTAssertEqual([storedEvent1 hash], [storedEvent2 hash]);
+  XCTAssertEqualObjects(storedEvent1, storedEvent2);
+
+  // This only really tests that changing the timezoneOffsetSeconds value causes a change in hash.
+  [storedEvent2.clockSnapshot setValue:@(-25201) forKeyPath:@"timezoneOffsetSeconds"];
+
+  XCTAssertNotEqual([storedEvent1 hash], [storedEvent2 hash]);
+  XCTAssertNotEqualObjects(storedEvent1, storedEvent2);
+}
+
 @end