♻️ WIP: Change some tests to Swift Testing, add TestBundle

tests/Shared/TestBundle.swift

@@ -0,0 +1,50 @@
+//
+//  BundleHelper.swift
+//  PHP Monitor
+//
+//  Created by Nico Verbruggen on 25/08/2025.
+//  Copyright © 2025 Nico Verbruggen. All rights reserved.
+//
+
+import Foundation
+
+/**
+ This file is used to access bundle resources via test structs
+ that cannot access the bundle via the previous class syntax.
+
+ After converting a test to Swift Testing, this is no longer possible:
+
+ ```swift
+ class MyTest: XCTestCase {
+    static var configurationFileUrl: URL {
+        return Bundle(for: Self.self).url(
+            forResource: "valet-config",
+            withExtension: "json"
+         )!
+    }
+ }
+ ```
+
+ Normally, we would be able to access the bundle via the class
+ itself, but we'd prefer _not_ to make this accessible to other
+ classes. Thankfully, this is where `fileprivate` shines.
+
+ The bundle is now accessed via `TestBundleClass`, which is not
+ accessible outside the scope of this file. `TestBundle` as a
+ global variable, though, is!
+
+ Usage:
+
+ ```swift
+ return TestBundle.url(
+     forResource: "valet-config",
+     withExtension: "json"
+ )!
+ ```
+ */
+
+fileprivate class TestBundleClass {}
+
+public var TestBundle: Bundle {
+    return Bundle(for: TestBundleClass.self)
+}