add source gen test

Author: ktoso

Tests/JExtractSwiftTests/ByteArrayTests.swift

@@ -0,0 +1,83 @@
+//===----------------------------------------------------------------------===//
+//
+// This source file is part of the Swift.org open source project
+//
+// Copyright (c) 2024 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 SwiftJavaConfigurationShared
+import Testing
+
+final class ByteArrayTests {
+  let text =
+    """
+    public func acceptArray(array: [UInt8])
+    """
+
+
+  @Test(
+    "Import: accept [UInt8] array",
+    arguments: [
+      // TODO: implement JNI mode here
+      (
+        JExtractGenerationMode.ffm,
+        /* expected Java chunks */
+        [
+          """
+          /**
+           * {@snippet lang=c :
+           * void swiftjava_SwiftModule_acceptArray_array(const void *array_pointer, ptrdiff_t array_count)
+           * }
+           */
+          private static class swiftjava_SwiftModule_acceptArray_array {
+            private static final FunctionDescriptor DESC = FunctionDescriptor.ofVoid(
+              /* array_pointer: */SwiftValueLayout.SWIFT_POINTER,
+              /* array_count: */SwiftValueLayout.SWIFT_INT
+            );
+          """,
+          """
+            /**
+             * Downcall to Swift:
+             * {@snippet lang=swift :
+             * public func acceptArray(array: [UInt8])
+             * }
+             */
+            public static void acceptArray(byte[] array) {
+              try(var arena$ = Arena.ofConfined()) {
+                swiftjava_SwiftModule_acceptArray_array.call(arena$.allocateFrom(ValueLayout.JAVA_BYTE, array), array.length);
+              }
+            }
+            """
+        ],
+        /* expected Swift chunks */
+        [
+          """
+          @_cdecl("swiftjava_SwiftModule_acceptArray_array")
+          public func swiftjava_SwiftModule_acceptArray_array(_ array_pointer: UnsafeRawPointer, _ array_count: Int) {
+            acceptArray(array: [UInt8](UnsafeRawBufferPointer(start: array_pointer, count: array_count)))
+          }
+          """
+        ]
+      )
+    ]
+  )
+  func func_accept_array_uint8(mode: JExtractGenerationMode, expectedJavaChunks: [String], expectedSwiftChunks: [String]) throws {
+    try assertOutput(
+      input: text, 
+      mode, .java,
+      expectedChunks: expectedJavaChunks)
+      
+      try assertOutput(
+      input: text, 
+      mode, .swift,
+      expectedChunks: expectedSwiftChunks)
+  }
+}

Tests/JExtractSwiftTests/FFM/FFMSubscriptsTests.swift

@@ -15,9 +15,6 @@
 import JExtractSwiftLib
 import Testing
 
-import JExtractSwiftLib
-import Testing
-
 @Suite
 struct FFMSubscriptsTests {
   private let noParamsSubscriptSource = """