8384109: [lworld] Update NegativeArraySizeExceptionTest to check arrays of value classes

test/hotspot/jtreg/runtime/exceptionMsgs/NegativeArraySizeException/NegativeArraySizeExceptionValueTest.java

@@ -0,0 +1,94 @@
+/*
+ * Copyright (c) 2026, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+/**
+ * @test
+ * @bug 8384109
+ * @summary Test NegativeArraySizeException message for value class arrays (migrated and custom).
+ * @library /test/lib
+ * @enablePreview
+ * @run main NegativeArraySizeExceptionValueTest
+ */
+import java.lang.reflect.Array;
+import jdk.test.lib.Asserts;
+public class NegativeArraySizeExceptionValueTest {
+
+    static value class Point {
+        int x;
+        int y;
+        Point(int x, int y) {
+            this.x = x;
+            this.y = y;
+        }
+    }
+
+    @FunctionalInterface
+    interface AllocAction {
+        void run() throws Exception;
+    }
+
+    private static void assertNASE(int size, AllocAction action) throws Exception {
+        try {
+            action.run();
+            throw new RuntimeException("Array allocation with negative size expected to fail!");
+        } catch (NegativeArraySizeException e) {
+            Asserts.assertEQ(Integer.toString(size), e.getMessage());
+        }
+    }
+
+    public static void main(String[] args) throws Exception {
+        int[] sizes = { -1, Integer.MIN_VALUE };
+        Class<?>[] types = { Integer.class, Point.class };
+
+        for (int size : sizes) {
+            for (Class<?> type : types) {
+                // Direct allocation via reflection
+                assertNASE(size, () -> Array.newInstance(type, size));
+
+                // Multi-dimensional: inner wrong
+                assertNASE(size, () -> Array.newInstance(type, new int[] {3, size}));
+
+                // Multi-dimensional: outer wrong
+                assertNASE(size, () -> Array.newInstance(type, new int[] {size, 3}));
+
+                // Multi-dimensional: inner wrong, outer zero
+                assertNASE(size, () -> Array.newInstance(type, new int[] {0, size}));
+            }
+        }
+
+        // Direct new[] expressions — Integer
+        for (int size : sizes) {
+            assertNASE(size, () -> { Object r = new Integer[size]; });
+            assertNASE(size, () -> { Object r = new Integer[3][size]; });
+            assertNASE(size, () -> { Object r = new Integer[size][3]; });
+            assertNASE(size, () -> { Object r = new Integer[0][size]; });
+        }
+
+        // Direct new[] expressions — custom value class Point
+        for (int size : sizes) {
+            assertNASE(size, () -> { Object r = new Point[size]; });
+            assertNASE(size, () -> { Object r = new Point[3][size]; });
+            assertNASE(size, () -> { Object r = new Point[size][3]; });
+            assertNASE(size, () -> { Object r = new Point[0][size]; });
+        }
+    }
+}