Cannot build for testing: Undefined symbol

[gmoraleda]

The issue

I've integrated DD in a custom Swift Package. Importing that package into my app target works flawlessly. I'm facing issues when building for testing. The compiler throws the following errors:

---

Datadog SDK version:

2.1.2

Last working Datadog SDK version:

N/A

Dependency Manager:

SPM

Xcode version:

Version 14.3 (14E222b)

Swift version:

swift-driver version: 1.75.2 Apple Swift version 5.8 (swiftlang-5.8.0.124.2 clang-1403.0.22.11.100)

Deployment Target:

iOS 15: iPhone

macOS version:

13.5.1 (22G90)

This is my Package.swift manifest:

let package = Package(
    name: "CapmoLogging",
    platforms: [
        .iOS(.v15),
    ],
    products: [
        // Products define the executables and libraries a package produces, and make them visible to other packages.
        .library(
            name: "CapmoLogging",
            targets: ["CapmoLogging"]
        ),
    ],
    dependencies: [
        // Dependencies declare other packages that this package depends on.
        .package(url: "https://github.com/CocoaLumberjack/CocoaLumberjack.git", exact: "3.8.1"),
        .package(url: "https://github.com/Datadog/dd-sdk-ios.git", exact: "2.1.2"),
        .package(url: "https://github.com/firebase/firebase-ios-sdk.git", exact: "10.14.0"),
        .package(url: "https://github.com/apollographql/apollo-ios.git", exact: "1.4.0"),
    ],
    targets: [
        // Targets are the basic building blocks of a package. A target can define a module or a test suite.
        // Targets can depend on other targets in this package, and on products in packages this package depends on.
        .target(
            name: "CapmoLogging",
            dependencies: [
                .product(name: "CocoaLumberjackSwift", package: "CocoaLumberjack"),
                .product(name: "DatadogCore", package: "dd-sdk-ios"),
                .product(name: "DatadogLogs", package: "dd-sdk-ios"),
                .product(name: "DatadogRUM", package: "dd-sdk-ios"),
                .product(name: "DatadogTrace", package: "dd-sdk-ios"),
                .product(name: "FirebaseCrashlytics", package: "firebase-ios-sdk"),
                .product(name: "Apollo", package: "apollo-ios"),
            ]
        ),
        .testTarget(
            name: "CapmoLoggingTests",
            dependencies: ["CapmoLogging"]
        ),
    ]
)

The issue seems to be around DatadogInternal, which I require to inject the DatatodURLSessionDelegate in my Apollo client:

import Apollo
import DatadogTrace
import Foundation

// Helpers https://github.com/DataDog/dd-sdk-ios/issues/416
// https://github.com/ncreated/iOSTutorial/pull/1/files#diff-cbdc81feecfa385baf9dbbbde18afc412bddea7518c879a2e3a393ac28d298f5

public final class DatadogURLSessionClient: URLSessionClient, __URLSessionDelegateProviding {
    public let ddURLSessionDelegate = DatadogURLSessionDelegate()

    override public func urlSession(_ session: URLSession, task: URLSessionTask, didFinishCollecting metrics: URLSessionTaskMetrics) {
        ddURLSessionDelegate.urlSession(session, task: task, didFinishCollecting: metrics)
        super.urlSession(session, task: task, didFinishCollecting: metrics)
    }

    override public func urlSession(_ session: URLSession, task: URLSessionTask, didCompleteWithError error: Error?) {
        ddURLSessionDelegate.urlSession(session, task: task, didCompleteWithError: error)
        super.urlSession(session, task: task, didCompleteWithError: error)
    }

    override public func urlSession(_ session: URLSession, dataTask: URLSessionDataTask, didReceive data: Data) {
        ddURLSessionDelegate.urlSession(session, dataTask: dataTask, didReceive: data)
        super.urlSession(session, dataTask: dataTask, didReceive: data)
    }
}