migration

PediFoodsTests/AppContentCacheTests.swift

@@ -0,0 +1,50 @@
+import Foundation
+import Testing
+@testable import PediFoods
+
+/// `AppContentCache.shared` is a true singleton with no injectable
+/// instance; `invalidate()` with no prefix wipes every key regardless of
+/// which test wrote it. Serialized so tests can't stomp on each other.
+@Suite(.serialized)
+struct AppContentCacheTests {
+    @Test("value(for:) returns what was just set")
+    func setThenGetRoundTrips() {
+        let key = "test.\(UUID().uuidString)"
+        AppContentCache.shared.set("hello", for: key, ttl: 60)
+        #expect(AppContentCache.shared.value(for: key, as: String.self) == "hello")
+    }
+
+    @Test("value(for:) returns nil once the TTL has elapsed")
+    func expiresAfterTTL() {
+        let key = "test.\(UUID().uuidString)"
+        AppContentCache.shared.set("hello", for: key, ttl: -1) // already expired
+        #expect(AppContentCache.shared.value(for: key, as: String.self) == nil)
+    }
+
+    @Test("value(for:) returns nil for a key that was never set")
+    func missingKeyReturnsNil() {
+        let key = "test.\(UUID().uuidString)"
+        #expect(AppContentCache.shared.value(for: key, as: String.self) == nil)
+    }
+
+    @Test("invalidate(prefix:) only removes keys matching that prefix")
+    func invalidateWithPrefixIsScoped() {
+        let prefix = "test.\(UUID().uuidString)."
+        AppContentCache.shared.set("a", for: "\(prefix)a", ttl: 60)
+        AppContentCache.shared.set("b", for: "\(prefix)b", ttl: 60)
+        AppContentCache.shared.set("unrelated", for: "unrelated.\(UUID().uuidString)", ttl: 60)
+
+        AppContentCache.shared.invalidate(prefix: prefix)
+
+        #expect(AppContentCache.shared.value(for: "\(prefix)a", as: String.self) == nil)
+        #expect(AppContentCache.shared.value(for: "\(prefix)b", as: String.self) == nil)
+    }
+
+    @Test("invalidate() with no prefix clears every entry")
+    func invalidateWithNoPrefixClearsEverything() {
+        let key = "test.\(UUID().uuidString)"
+        AppContentCache.shared.set("hello", for: key, ttl: 60)
+        AppContentCache.shared.invalidate()
+        #expect(AppContentCache.shared.value(for: key, as: String.self) == nil)
+    }
+}