Replaced the "test" static constant for the Logger+Constants extension in the test target with a "test(level: handler: )" function for the Logger+Helpers extension.

Tests/DocCMiddleware/Types/Extensions/Logger+Constants.swift

@@ -1,32 +0,0 @@
-// ===----------------------------------------------------------------------===
-//
-// This source file is part of the Hummingbird DocC Middleware open source project
-//
-// Copyright (c) 2025 Röck+Cöde VoF. and the Hummingbird DocC Middleware project authors
-// Licensed under the EUPL 1.2 or later.
-//
-// See LICENSE for license information
-// See CONTRIBUTORS for the list of Hummingbird DocC Middleware project authors
-//
-// ===----------------------------------------------------------------------===
-
-import Foundation
-import Logging
-import Testing
-
-extension Logger {
-    
-    // MARK: Constants
-    
-    /// Creates a logger instance that is ready to use in test cases.
-    static let test: Self = {
-        var logger = Logger(label: "test.hummingbird-docc-middleware.logger")
-        
-        logger.logLevel = try! #require(Logger.Level.allCases.randomElement())
-
-        logger[metadataKey: "hb.request.id"] = "\(UUID().uuidString)"
-
-        return logger
-    }()
-    
-}

Tests/DocCMiddleware/Types/Extensions/Logger+Helpers.swift

@@ -0,0 +1,57 @@
+// ===----------------------------------------------------------------------===
+//
+// This source file is part of the Hummingbird DocC Middleware open source project
+//
+// Copyright (c) 2025 Röck+Cöde VoF. and the Hummingbird DocC Middleware project authors
+// Licensed under the EUPL 1.2 or later.
+//
+// See LICENSE for license information
+// See CONTRIBUTORS for the list of Hummingbird DocC Middleware project authors
+//
+// ===----------------------------------------------------------------------===
+
+import Foundation
+import Testing
+
+import protocol Logging.LogHandler
+
+import struct Logging.Logger
+
+extension Logger {
+    
+    // MARK: Functions
+    
+    /// Generates a logger instance that is ready to use in test cases.
+    /// - Parameters:
+    ///   - level: A logger level, if any.
+    ///   - handler: A custom log handler, if any.
+    /// - Returns: A generated logger instance ready to use in test cases.
+    static func test(
+        level: Logger.Level? = nil,
+        handler: (any LogHandler)? = nil
+    ) -> Self {
+        var logger: Logger = if let handler {
+            .init(label: .loggerLabel) { _ in handler }
+        } else {
+            .init(label: .loggerLabel)
+        }
+
+        logger.logLevel = if let level {
+            level
+        } else {
+            try! #require(Logger.Level.allCases.randomElement())
+        }
+
+        logger[metadataKey: "hb.request.id"] = "\(UUID().uuidString)"
+
+        return logger
+    }
+    
+}
+
+// MARK: - Constants
+
+private extension String {
+    /// A label to assign to a test logger instance.
+    static let loggerLabel = "test.hummingbird-docc-middleware.logger"
+}