使用Firebase Emulator在XCode中测试Firestore时，如何设置测试数据? [英] How to setup test data when testing Firestore in XCode with Firebase Emulator?

问题描述

几天来我一直在尝试使用测试数据设置Firebase Emulator.

I have been trying to setup Firebase Emulator with test data for days.

• 我已经成功部署了Firebase模拟器
• 我编写了一个测试，该测试检查了模拟的Firestore中的值，并且测试也通过了.

func test_WhenPartyNameIsUnique_ThenErrorIsNil() {
   // given
   let exp = self.expectation(description: "Waiting for Firebase Emulator")

   // when
   self.sut.isUnique(partyName: "akshit") { (error) in
     // then
     XCTAssertNil(error)
     exp.fulfill()
   }

   self.waitForExpectations(timeout: 1, handler: nil)
}

出什么问题了?

我无法弄清楚如何为每个测试设置不同的测试数据.对于以上测试，我想检查partyName是否唯一(意味着数据库中已经存在).我该怎么办?

What's the problem?

I am not able to figure out how would I set up different test data for each of the tests. For the above test, I want to check if the partyName is not unique (meaning already present in the database). How do I do that?

推荐答案

Firestore模拟器现在支持导入/导出.因此，创建一个测试用例:

The Firestore emulator now supports import/export. So to create the a test case:

1. 运行模拟器( firebase emulators:start )
2. 连接您的应用程序或脚本并创建所需的测试数据
3. 在另一个终端窗口中运行 firebase emulators:export ./some-directory

现在，您将在 ./some-directory 中拥有Firestore模拟器数据的快照.您可以通过运行以下数据来启动仿真器:

Now you will have a snapshot of Firestore emulator data in ./some-directory. You can start the emulators with that data by running:

firebase emulators:start --import=./some-directory

目前，该功能仅支持Firestore，但我们希望将来可以使用相同的流程将导入/导出添加到更多仿真器中.

Right now this only supports Firestore but we hope to add import/export to more emulators using the same flow in the future.

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