splitting apart redisplay dict and messages dict unit tests

The previous test did not actually result in the migration running for the redisplay dictionary, but it worked because we set the NSKeyedUnarchiver class when doing the messages array migration.

Author: emawby

iOS_SDK/OneSignalSDK/UnitTests/MigrationTests.m

@@ -288,7 +288,7 @@ - (void)testIAMNilCacheToNilMigration {
     XCTAssertNil(retrievedDict);
 }
 
-- (void)testIAMToInternalMigration {
+- (void)testIAMMessagesToInternalMigration {
     let limit = 5;
     let delay = 60;
     let message = [OSInAppMessageTestHelper testMessageWithRedisplayLimit:limit delay:@(delay)];
@@ -306,7 +306,13 @@ - (void)testIAMToInternalMigration {
     NSArray<OSInAppMessageInternal *>*retrievedArray = [OneSignalUserDefaults.initStandard
                                                                 getSavedCodeableDataForKey:OS_IAM_MESSAGES_ARRAY defaultValue:nil];
     XCTAssertEqualObjects(messages, retrievedArray);
-    
+}
+
+- (void)testIAMRedisplayToInternalMigration {
+    let limit = 5;
+    let delay = 60;
+    let message = [OSInAppMessageTestHelper testMessageWithRedisplayLimit:limit delay:@(delay)];
+    message.isDisplayedInSession = true;
     // Cached Redisplay Messages
     NSMutableDictionary <NSString *, OSInAppMessageInternal *> *redisplayedInAppMessages = [NSMutableDictionary new];
     [redisplayedInAppMessages setObject:message forKey:message.messageId];
@@ -323,7 +329,4 @@ - (void)testIAMToInternalMigration {
 }
 
 
-
-
-
 @end