add tests

Author: madsodgaard

Tests/JExtractSwiftTests/MemoryManagementModeTests.swift

@@ -0,0 +1,77 @@
+//===----------------------------------------------------------------------===//
+//
+// This source file is part of the Swift.org open source project
+//
+// Copyright (c) 2025 Apple Inc. and the Swift.org project authors
+// Licensed under Apache License v2.0
+//
+// See LICENSE.txt for license information
+// See CONTRIBUTORS.txt for the list of Swift.org project authors
+//
+// SPDX-License-Identifier: Apache-2.0
+//
+//===----------------------------------------------------------------------===//
+
+import JExtractSwiftLib
+import JavaKitConfigurationShared
+import Testing
+
+@Suite
+struct MemoryManagementModeTests {
+  let text =
+    """
+    class MyClass {}
+    
+    public func f() -> MyClass
+    """
+
+  @Test
+  func explicit() throws {
+    var config = Configuration()
+    config.memoryManagementMode = .explicit
+
+    try assertOutput(
+      input: text,
+      config: config,
+      .jni, .java,
+      expectedChunks: [
+        """
+        /**
+          * Downcall to Swift:
+          * {@snippet lang=swift :
+          * public func f() -> MyClass
+          * }
+          */
+          public static MyClass f(SwiftArena swiftArena$) {
+            return new MyClass(SwiftModule.$f(), swiftArena$);
+          }
+        """,
+      ]
+    )
+  }
+
+  @Test
+  func allowGlobalAutomatic() throws {
+    var config = Configuration()
+    config.memoryManagementMode = .allowGlobalAutomatic
+
+    try assertOutput(
+      input: text,
+      config: config,
+      .jni, .java,
+      detectChunkByInitialLines: 1,
+      expectedChunks: [
+        """
+        public static MyClass f() {
+          return f(SwiftMemoryManagement.GLOBAL_SWIFT_JAVA_ARENA);
+        }
+        """,
+        """
+        public static MyClass f(SwiftArena swiftArena$) {
+          return new MyClass(SwiftModule.$f(), swiftArena$);
+        }
+        """,
+      ]
+    )
+  }
+}