Missing required module 'FirebaseCore' in unit tests

[alexanderkhitev]

[REQUIRED] Step 1: Describe your environment

• Xcode version: 14.0 beta 4 (14A5284g)
• Firebase SDK version: 9.3.0
• Installation method: Swift Package Manager (select one)
• Firebase Component: FirebaseAuth, FirebaseAnalyticsSwift, FirebaseAuthCombine
• Target platform(s): iOS

[REQUIRED] Step 2: Describe the problem

Steps to reproduce:

I added three SDKs for now in one of my pet project and it works but when I try to launch unit tests (XCTestCase) I get error "Missing required module 'FirebaseCore'" where @testable import AppName is declared. Do we have any solutions for this? Thanks.

Relevant Code:

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[morganchen12]

Off the top of my head, this might be due to the FirebaseCore module headers not being visible from your test target. You can check your search paths build settings to see if this is the case.

Otherwise, if you could upload a test project that repros this issue, it would help us identify the root cause.

[alexanderkhitev]

hey @morganchen12 ! Yes, sure. It's a simple project. I'll also have a look on your suggestion (paths build settings).
FirebaseSDKs.zip

[paulb777]

Thanks for the great repro @alexanderkhitev

Add FirebaseAuth as a linker dependency to the test targets:

[alexanderkhitev]

Thanks for the great repro @alexanderkhitev

Add FirebaseAuth as a linker dependency to the test targets:

Thank you. I have only one question. Unless in this case we do not receive errors like this one?
Class FIRCoreDiagnosticsLog is implemented in both

[paulb777]

Good question. I see that also. It seems that Xcode is using different search path algorithms between compiling and linking, but I'm not sure why.