crossmate

commit 2139e0500cccd948a72e516a3a0742ad6c7a5472
parent 989abe0224173f0a0121e65ae5ffe7d6a4f3b6b3
Author: Michael Camilleri <[email protected]>
Date:   Thu,  2 Jul 2026 00:14:15 +0900

Run tests in serial to prevent overwriting

Diffstat:
M
Tests/Unit/Sync/EngagementMessageAuthenticatorTests.swift
 | 
9
++++++++-

1 file changed, 8 insertions(+), 1 deletion(-)
diff --git a/Tests/Unit/Sync/EngagementMessageAuthenticatorTests.swift b/Tests/Unit/Sync/EngagementMessageAuthenticatorTests.swift
@@ -3,7 +3,14 @@ import Testing
 
 @testable import Crossmate
 
-@Suite("EngagementMessageAuthenticator")
+// Serialised: every `withAliceBobKey` test mutates the same global
+// `UserDefaults` key (`push.friendEncryptionKey.<pairKey(alice,bob)>`) and
+// removes it on the way out. Run in parallel, one test's cleanup can delete the
+// key while another is mid-flight, so `authTags` finds no local send key and
+// `roundTripVerifies` sees empty tags. The fixed pair is unique to this suite
+// (AccountPushCoordinatorTests uses a per-test UUID pair), so serialising here
+// is enough to isolate them.
+@Suite("EngagementMessageAuthenticator", .serialized)
 struct EngagementMessageAuthenticatorTests {
     private static let alice = "_alice"
     private static let bob = "_bob"