[foreign-memaccess] Test for wrong first coordinate type

[Paul Sandoz]

Here’s a simple test for a wrong first coordinate type i.e. something other than MemoryAddress.

I don’t think we require anything more substantial given the type checking is consolidated in one place, and there are substantial negative tests in general for VarHandles.  We could, as a follow on change to this test, choose to expand to all access modes just to be sure.

Paul.

diff -r 06dbd52de6a3 test/jdk/java/foreign/TestTypeAccess.java
--- /dev/null   Thu Jan 01 00:00:00 1970 +0000
+++ b/test/jdk/java/foreign/TestTypeAccess.java Fri Dec 20 09:08:21 2019 -0800
@@ -0,0 +1,54 @@
+/*
+ * Copyright (c) 2019, 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
+ * @run testng TestTypeAccess
+ */
+
+import jdk.incubator.foreign.MemorySegment;
+import jdk.incubator.foreign.MemoryLayouts;
+import org.testng.annotations.*;
+
+import java.lang.invoke.VarHandle;
+import java.lang.invoke.WrongMethodTypeException;
+
+public class TestTypeAccess {
+
+    static final VarHandle INT_HANDLE = MemoryLayouts.JAVA_INT.varHandle(int.class);
+
+    @Test(expectedExceptions=ClassCastException.class)
+    public void testMemoryAddressCoordinateAsString() {
+        try (MemorySegment s = MemorySegment.allocateNative(8)) {
+            int v = (int)INT_HANDLE.get("string");
+        }
+    }
+
+    @Test(expectedExceptions=WrongMethodTypeException.class)
+    public void testMemoryCoordinatePrimitive() {
+        try (MemorySegment s = MemorySegment.allocateNative(8)) {
+            int v = (int)INT_HANDLE.get(1);
+        }
+    }
+}