用于多平台应用程序的Swift UnitTest未定义符号

Question

我尝试用xcode 13.4.1创建单元测试

我创建了一个新的projet，让我们称它为MyApp，包括单元测试。

File -> New -> Project -> Multiplatform -> App

我为示例创建了一个简单的类

class Manager {
    
    var customData: CustomData
    
    init(custom: CustomData) {
        customData = custom
    }
    
    func setName(value: String) {
        customData.name = value
    }
}

有一个简单的数据结构

struct CustomData {
    var name: String
}

然后我创建了一个XCTestCase

import XCTest
@testable import MyApp

class Tests_iOS: XCTestCase {
    
    var manager: Manager = Manager(custom: .init(name: "Hello"))
    
    func testManagerChangeNameChange() {
        XCTAssert(manager.customData.name == "Hello")
        manager.setName(value: "Bonjour")
        XCTAssert(manager.customData.name == "Bonjour")
    }
}

但我有个问题：

Undefined symbol: nominal type descriptor for MyApp.Manager

Undefined symbol: type metadata accessor for MyApp.Manager

Undefined symbol: MyApp.CustomData.init(name: Swift.String) -> MyApp.CustomData

Undefined symbol: MyApp.Manager.__allocating_init(custom: MyApp.CustomData) -> MyApp.Manager


Undefined symbols for architecture x86_64:
  "nominal type descriptor for MyApp.Manager", referenced from:
      _symbolic _____ 5MyApp7ManagerC in Tests_iOS.o
  "type metadata accessor for MyApp.Manager", referenced from:
      variable initialization expression of Tests_iOS.Tests_iOS.manager : MyApp.Manager in Tests_iOS.o
      Tests_iOS.Tests_iOS.init(invocation: __C.NSInvocation?) -> Tests_iOS.Tests_iOS in Tests_iOS.o
      Tests_iOS.Tests_iOS.init(selector: ObjectiveC.Selector) -> Tests_iOS.Tests_iOS in Tests_iOS.o
      Tests_iOS.Tests_iOS.init() -> Tests_iOS.Tests_iOS in Tests_iOS.o
  "MyApp.CustomData.init(name: Swift.String) -> MyApp.CustomData", referenced from:
      variable initialization expression of Tests_iOS.Tests_iOS.manager : MyApp.Manager in Tests_iOS.o
      Tests_iOS.Tests_iOS.init(invocation: __C.NSInvocation?) -> Tests_iOS.Tests_iOS in Tests_iOS.o
      Tests_iOS.Tests_iOS.init(selector: ObjectiveC.Selector) -> Tests_iOS.Tests_iOS in Tests_iOS.o
      Tests_iOS.Tests_iOS.init() -> Tests_iOS.Tests_iOS in Tests_iOS.o
  "MyApp.Manager.__allocating_init(custom: MyApp.CustomData) -> MyApp.Manager", referenced from:
      variable initialization expression of Tests_iOS.Tests_iOS.manager : MyApp.Manager in Tests_iOS.o
      Tests_iOS.Tests_iOS.init(invocation: __C.NSInvocation?) -> Tests_iOS.Tests_iOS in Tests_iOS.o
      Tests_iOS.Tests_iOS.init(selector: ObjectiveC.Selector) -> Tests_iOS.Tests_iOS in Tests_iOS.o
      Tests_iOS.Tests_iOS.init() -> Tests_iOS.Tests_iOS in Tests_iOS.o
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)

Answer 1

由于这个应用程序是用于多平台的，我在这里找到了一个解析器：https://developer.apple.com/forums/thread/665120

默认测试是UI，您需要添加一个单元测试目标，然后创建一个新的构建方案。