8187443: Forest Consolidation: Move files to unified layout

Reviewed-by: darcy, ihse

test/langtools/tools/javac/StringConversion.java

@@ -0,0 +1,108 @@
+/*
+ * Copyright (c) 1997, 1998, 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 4030173 4071548
+ * @summary Verify correct conversion of non-string arguments in string concatenation.
+ * @author maddox
+ *
+ * @compile StringConversion.java
+ * @run main StringConversion
+ */
+
+class FooBar {
+    public String toString(){
+        return null;
+    }
+}
+
+public class StringConversion {
+
+    static void check(int testid, String have, String expect)
+                throws Exception {
+        if ((have == null && have != expect) ||
+                (have != null && !have.equals(expect))) {
+            String msg =
+                "TEST " + testid + ": HAVE \"" +
+                have + "\" EXPECT \"" + expect + "\"";
+            System.out.println("StringConversion: " + msg);
+            throw new Exception(msg);
+        }
+    }
+
+    public static void main(String[] args) throws Exception {
+
+        String s;
+        String n = null;
+        Object o = null;
+        FooBar m = new FooBar();
+
+        // Null reference must be converted to "null"
+
+        // Conversion will be done by 'StringBuffer.append'.
+        s = "foo" + n;
+        check(11, s, "foonull");
+        s = n + "bar";
+        check(12, s, "nullbar");
+        s = "foo" + o;
+        check(13, s, "foonull");
+        s = o + "bar";
+        check(14, s, "nullbar");
+
+        // Conversion will be done by 'String.valueOf'.
+        s = "" + n;
+        check(21, s, "null");
+        s = n + "";
+        check(22, s, "null");
+        s = "" + o;
+        check(23, s, "null");
+        s = o + "";
+        check(24, s, "null");
+
+        // Null 'toString' result must be converted to "null"
+
+        // Conversion will be done by 'StringBuffer.append'.
+        s = "foo" + m;
+        check(31, s, "foonull");
+        s = m + "bar";
+        check(32, s, "nullbar");
+
+        // Conversion will be done by 'String.valueOf'.
+        s = "" + m;
+        check(43, s, "null");
+        s = m + "";
+        check(44, s, "null");
+
+        // A character array must be converted as if by
+        // 'toString', i.e., it is treated as an 'Object'.
+
+        s = "polymorph";
+        char[] ca = {'i', 's', 'm'};
+
+        check(51, s + ca, s + ca.toString());
+        check(52, ca + s, ca.toString() + s);
+
+        System.out.println("OK");
+    }
+}