Fix unit tests on iOS 16 and earlier

Author: pyrtsa

Tests/ComposableArchitectureTests/StorePerceptionTests.swift

@@ -4,6 +4,10 @@ import XCTest
 
 @available(iOS 16, macOS 13, tvOS 16, watchOS 9, *)
 final class StorePerceptionTests: BaseTCATestCase {
+  override func setUpWithError() throws {
+    try checkAvailability()
+  }
+
   @MainActor
   func testPerceptionCheck_SkipWhenOutsideView() {
     let store = Store(initialState: Feature.State()) {
@@ -43,8 +47,10 @@ final class StorePerceptionTests: BaseTCATestCase {
         render(FeatureView())
       } issueMatcher: {
         $0.compactDescription == """
-          Perceptible state was accessed but is not being tracked. Track changes to state by \
-          wrapping your view in a 'WithPerceptionTracking' view.
+          failed - Perceptible state was accessed but is not being tracked. Track changes to state by \
+          wrapping your view in a 'WithPerceptionTracking' view. This must also be done for any \
+          escaping, trailing closures, such as 'GeometryReader', `LazyVStack` (and all lazy \
+          views), navigation APIs ('sheet', 'popover', 'fullScreenCover', etc.), and others.
           """
       }
     }
@@ -87,3 +93,10 @@ private struct Feature {
     }
   }
 }
+
+// NB: Workaround to XCTest ignoring `@available(...)` attributes.
+private func checkAvailability() throws {
+  guard #available(iOS 16, macOS 13, tvOS 16, watchOS 9, *) else {
+    throw XCTSkip("Requires iOS 16, macOS 13, tvOS 16, or watchOS 9")
+  }
+}