Missing SCNReachability in Test Bundle

[ryantstone]

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[REQUIRED] Step 1: Describe your environment

• Xcode version: Version 12.0 beta 5 (12A8189h)
• Firebase SDK version: 6.32-SPM-beta
• Firebase Component: FireStore (Auth, Core, Database, Firestore, Messaging, Storage, etc)
• Component version: 6.32
• Installation method: SPM

[REQUIRED] Step 2: Describe the problem

When running the test bundle I get:

Undefined symbols for architecture x86_64:
  "_SCNetworkReachabilityCreateWithAddress", referenced from:
      firebase::firestore::remote::(anonymous namespace)::CreateReachability() in SubFramework(FirebaseFirestore.o)
  "_SCNetworkReachabilitySetCallback", referenced from:
      firebase::firestore::remote::ConnectivityMonitorApple::ConnectivityMonitorApple(std::__1::shared_ptr<firebase::firestore::util::AsyncQueue> const&) in SubFramework(FirebaseFirestore.o)
  "_SCNetworkReachabilityGetFlags", referenced from:
      firebase::firestore::remote::ConnectivityMonitorApple::ConnectivityMonitorApple(std::__1::shared_ptr<firebase::firestore::util::AsyncQueue> const&) in SubFramework(FirebaseFirestore.o)
      firebase::firestore::remote::ConnectivityMonitorApple::OnEnteredForeground() in SubFramework(FirebaseFirestore.o)
  "_SCNetworkReachabilitySetDispatchQueue", referenced from:
      firebase::firestore::remote::ConnectivityMonitorApple::ConnectivityMonitorApple(std::__1::shared_ptr<firebase::firestore::util::AsyncQueue> const&) in SubFramework(FirebaseFirestore.o)
      firebase::firestore::remote::ConnectivityMonitorApple::~ConnectivityMonitorApple() in SubFramework(FirebaseFirestore.o)
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)

The project runs fine, but the test bundle will fail if a specific combination of files is used.

Steps to reproduce:

I'm not sure of the steps, but I have an example project. Where it occurs.
https://github.com/ryantstone/Firebase-Bug-Example

If a single test is commented out (ConvertTests.test_timeToPickerValue_convertsHoursAndMinutes_toNativePickerData) the test suite will build and run, but if that test is in it will fail.

Steps to reproduce are in the Readme in the repo.

[google-oss-bot]

I couldn't figure out how to label this issue, so I've labeled it for a human to triage. Hang tight.

[morganchen12]

The test passes if commented out because the linker strips unused symbols. Can you try adding SystemConfiguration.framework to the Link Binary with Libraries part of your test target's Build Phases?

[ryantstone]

It does build when adding it. Thank you.

[morganchen12]

Closing this issue since it seems to be resolved, let me know if you need any more help.

[paulb777]

Going to reopen since this may have a similar resolution as #6408 with #6419.