NewMockIStore creates a new mock instance.

NewMockPostStore creates a new mock instance.

NewMockUserStore creates a new mock instance.

NewStore 创建一个 IStore 类型的实例.

全局变量，方便其它包直接调用已初始化好的 S 实例.

MockIStore is a mock of IStore interface.

MockIStoreMockRecorder is the mock recorder for MockIStore.

MockPostStore is a mock of PostStore interface.

MockPostStoreMockRecorder is the mock recorder for MockPostStore.

MockUserStore is a mock of UserStore interface.

MockUserStoreMockRecorder is the mock recorder for MockUserStore.

IStore 定义了 Store 层需要实现的方法.

PostStore 定义了 post 模块在 store 层所实现的方法.

UserStore 定义了 user 模块在 store 层所实现的方法.