test: TimerPublisher on macOS 11

Tests/CXFoundationTests/TimerSpec.swift

@@ -32,21 +32,5 @@ class TimerSpec: QuickSpec {
 
             _ = connection
         }
-
-        // MARK: 1.3 should add demands up from multiple subscriber
-        it("should add demands up from multiple subscriber") {
-            let pub = CXWrappers.Timer.publish(every: 0.1, on: .current, in: .common)
-            let sub1 = pub.subscribeTracingSubscriber(initialDemand: .max(1))
-            let sub2 = pub.subscribeTracingSubscriber(initialDemand: .max(2))
-
-            let connection = pub.connect()
-
-            RunLoop.current.run(until: Date().addingTimeInterval(1))
-
-            expect(sub1.eventsWithoutSubscription.count) == 3
-            expect(sub2.eventsWithoutSubscription.count) == 3
-
-            connection.cancel()
-        }
     }
 }

Tests/CXInconsistentTests/Versioning/VersioningTimerSpec.swift

@@ -0,0 +1,34 @@
+import CXShim
+import CXTestUtility
+import Foundation
+import Nimble
+import Quick
+
+class VersioningTimerSpec: QuickSpec {
+
+    override func spec() {
+
+        it("should not add demands up from multiple subscriber") {
+            let pub = CXWrappers.Timer.publish(every: 0.1, on: .current, in: .common)
+            let sub1 = pub.subscribeTracingSubscriber(initialDemand: .max(1))
+            let sub2 = pub.subscribeTracingSubscriber(initialDemand: .max(2))
+
+            let connection = pub.connect()
+
+            RunLoop.current.run(until: Date().addingTimeInterval(1))
+
+            #if USE_COMBINE // FIXME: MACOS11: Apple's implementation is outdated
+            expect(sub1.eventsWithoutSubscription.count).toVersioning([
+                .v11_0: equal(3),
+                .v12_0: equal(1)
+            ])
+            expect(sub2.eventsWithoutSubscription.count).toVersioning([
+                .v11_0: equal(3),
+                .v12_0: equal(2)
+            ])
+            #endif
+
+            connection.cancel()
+        }
+    }
+}

Tests/LinuxMain.swift

@@ -93,4 +93,5 @@ QCKMain([
     VersioningSwitchToLatestSpec.self,
     VersioningFutureSpec.self,
     VersioningTimeoutSpec.self,
+    VersioningTimerSpec.self,
 ])