Stabilize iOS/watchOS/tvOS apps and add cross-platform audit remediation

SharedCore/Tests/SharedCoreWatchOSTests/BoundedFIFOQueueTests.swift

@@ -0,0 +1,36 @@
+import XCTest
+@testable import SharedCore
+
+final class BoundedFIFOQueueTests: XCTestCase {
+    func testDisconnectReconnectFlushPreservesOrder() {
+        var queue = BoundedFIFOQueue<Int>(maxCount: 5)
+
+        _ = queue.enqueue(10)
+        _ = queue.enqueue(20)
+        _ = queue.enqueue(30)
+
+        XCTAssertEqual(queue.dequeueAll(), [10, 20, 30])
+        XCTAssertTrue(queue.isEmpty)
+    }
+
+    func testOverflowDropsOldestPayloads() {
+        var queue = BoundedFIFOQueue<Int>(maxCount: 3)
+
+        XCTAssertEqual(queue.enqueue(1), 0)
+        XCTAssertEqual(queue.enqueue(2), 0)
+        XCTAssertEqual(queue.enqueue(3), 0)
+        XCTAssertEqual(queue.enqueue(4), 1)
+        XCTAssertEqual(queue.enqueue(5), 1)
+
+        XCTAssertEqual(queue.dequeueAll(), [3, 4, 5])
+    }
+
+    func testMaxCountHasLowerBoundOfOne() {
+        var queue = BoundedFIFOQueue<Int>(maxCount: 0)
+
+        _ = queue.enqueue(1)
+        XCTAssertEqual(queue.enqueue(2), 1)
+        XCTAssertEqual(queue.dequeueAll(), [2])
+    }
+}
+

SharedCore/Tests/SharedCoreWatchOSTests/WatchPayloadValidationTests.swift

@@ -0,0 +1,47 @@
+import XCTest
+@testable import SharedCore
+
+final class WatchPayloadValidationTests: XCTestCase {
+    private struct MockPayload: Codable, Equatable {
+        let name: String
+        let count: Int
+    }
+
+    func testValidateRejectsEmptyPayload() {
+        let error = WatchPayloadValidation.validate(Data())
+        XCTAssertEqual(error, .emptyPayload)
+    }
+
+    func testValidateRejectsOversizedPayload() {
+        let payload = Data(repeating: 0, count: 9)
+        let error = WatchPayloadValidation.validate(payload, maxBytes: 8)
+        XCTAssertEqual(error, .payloadTooLarge(actualBytes: 9, maxBytes: 8))
+    }
+
+    func testDecodeAcceptsValidPayload() throws {
+        let payload = try JSONEncoder().encode(MockPayload(name: "set", count: 12))
+        let decoded = try WatchPayloadValidation.decode(MockPayload.self, from: payload)
+        XCTAssertEqual(decoded, MockPayload(name: "set", count: 12))
+    }
+
+    func testDecodeRejectsInvalidJSON() throws {
+        let invalid = Data("not-json".utf8)
+
+        XCTAssertThrowsError(try WatchPayloadValidation.decode(MockPayload.self, from: invalid)) { error in
+            XCTAssertEqual(error as? WatchPayloadValidationError, .decodeFailure)
+        }
+    }
+
+    func testDecodeRejectsOversizedPayloadBeforeDecoding() {
+        let payload = Data(repeating: 1, count: 32)
+
+        XCTAssertThrowsError(
+            try WatchPayloadValidation.decode(MockPayload.self, from: payload, maxBytes: 16)
+        ) { error in
+            XCTAssertEqual(
+                error as? WatchPayloadValidationError,
+                .payloadTooLarge(actualBytes: 32, maxBytes: 16)
+            )
+        }
+    }
+}

SharedCore/Tests/SharedCoreWatchOSTests/WorkoutValidationTests.swift

@@ -0,0 +1,39 @@
+import XCTest
+@testable import SharedCore
+
+final class WorkoutValidationTests: XCTestCase {
+    func testValidateSupersetsRejectsEmptyPayload() {
+        let issues = WorkoutValidation.validateSupersets([])
+        XCTAssertEqual(issues.first?.code, "empty_supersets")
+    }
+
+    func testValidateSupersetsRejectsInvalidRoundsAndExercisePayload() {
+        let supersets: [[String: Any]] = [
+            [
+                "rounds": 0,
+                "exercises": [
+                    ["reps": 0, "duration": 0]
+                ]
+            ]
+        ]
+
+        let issues = WorkoutValidation.validateSupersets(supersets)
+        XCTAssertTrue(issues.contains(where: { $0.code == "invalid_rounds" }))
+        XCTAssertTrue(issues.contains(where: { $0.code == "invalid_exercise_payload" }))
+    }
+
+    func testValidateSupersetsAcceptsValidPayload() {
+        let supersets: [[String: Any]] = [
+            [
+                "rounds": 3,
+                "exercises": [
+                    ["reps": 12, "duration": 0],
+                    ["reps": 0, "duration": 30]
+                ]
+            ]
+        ]
+
+        let issues = WorkoutValidation.validateSupersets(supersets)
+        XCTAssertTrue(issues.isEmpty)
+    }
+}