Objective c 尝试在测试中添加NSPersistentStore（SQLite）时出错

我正在尝试向核心数据应用程序添加一些测试。该应用程序实际上运行良好，当我尝试创建堆栈时，测试失败得很惨

我在尝试将

SQLite

类型的

NSPersistentStore

添加到

nspersistentstorecordinator

时出错：

- (NSPersistentStoreCoordinator *)storeCoordinator
{
    if (_storeCoordinator == nil) {
        _storeCoordinator = [[NSPersistentStoreCoordinator alloc] initWithManagedObjectModel:self.model];

        NSError *err = nil;
        if (![_storeCoordinator addPersistentStoreWithType:NSSQLiteStoreType
                                             configuration:nil
                                                       URL:self.dbURL
                                                   options:[[self class] persistentStoreCordinatorOptions]
                                                     error:&err]) {
            //This is where I get the error
            NSNotification *note = [NSNotification
                                    notificationWithName:[[self class] persistentStoreCoordinatorErrorNotificationName]
                                    object:self
                                    userInfo:@{@"error" : err}];
            [[NSNotificationCenter defaultCenter] postNotification:note];
            NSLog(@"Error while adding a Store: %@", err);
            return nil;
        }
    }

    return _storeCoordinator;
}

这就是错误：

CoreData: error: -addPersistentStoreWithType:SQLite configuration:(null) URL:file:///Users/cfisher/Library/Developer/CoreSimulator/Devices/860C8F97-354D-4A9D-B1E9-CC018680F487/data/Library/Caches/TestModel options:{
    NSInferMappingModelAutomaticallyOption = 1;
    NSMigratePersistentStoresAutomaticallyOption = 1;
    NSReadOnlyPersistentStoreOption = 1;
} ... returned error Error Domain=NSCocoaErrorDomain Code=260 "The operation couldn’t be completed. (Cocoa error 260.)" with userInfo dictionary {
}

错误中提到的URL是通过以下方式获得的（下面的dbURL属性）：

---

这只发生在测试中。该应用程序运行良好。有什么想法吗？

在您的设置方法中，您正在使用self.testModelName进行设置之前，请检查这是否是问题所在。您可能还需要在testModelName的末尾包含

.sqlite

。

- (void)setUp {
    [super setUp];

    NSURL *cache = [[[NSFileManager defaultManager]
                     URLsForDirectory:NSCachesDirectory
                     inDomains:NSUserDomainMask] lastObject];
    self.dbURL = [cache URLByAppendingPathComponent:self.testModelName];

    self.testModelName = @"TestModel";
    self.testBundle = [NSBundle bundleForClass:[self class]];

}