test/hotspot/jtreg/runtime/cds/appcds/sharedStrings/HelloStringPlus.java
changeset 57567 b000362a89a0
parent 54379 40a7e2fc9beb
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/test/hotspot/jtreg/runtime/cds/appcds/sharedStrings/HelloStringPlus.java	Mon Jul 29 10:34:20 2019 -0400
@@ -0,0 +1,76 @@
+/*
+ * Copyright (c) 2015, 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.
+ *
+ */
+
+// A test class to be launched in AppCDS mode, has basic+
+// coverage of string operations
+
+import sun.hotspot.WhiteBox;
+
+public class HelloStringPlus {
+    public static void main(String args[]) {
+        // Let's reference the string that is in archive
+        String testString1 = "shared_test_string_unique_14325";
+        System.out.println("Hello String: " + testString1);
+
+        WhiteBox wb = WhiteBox.getWhiteBox();
+        if (!wb.isShared(testString1) && !wb.areSharedStringsIgnored()) {
+            throw new RuntimeException("testString1 is not shared");
+        }
+
+        // Check other basic string operations
+        // Interning and equality
+        String[] testArray = new String[] {"shared_", "test_", "string_", "intern_", "12345"};
+        String toBeInterned = "";
+
+        StringBuilder sb = new StringBuilder();
+        for (String s : testArray) {
+            sb.append(s);
+        }
+        toBeInterned = sb.toString();
+
+        System.out.println("About to intern a string: " + toBeInterned);
+        toBeInterned.intern();
+
+        // check equality
+        if (testString1.equals(toBeInterned))
+            throw new RuntimeException("Equality test 1 failed");
+
+        if (!testString1.equals("shared_test_string" + '_' + "unique_14325"))
+            throw new RuntimeException("Equality test 2 failed");
+
+        // Chech the hash code functionality; no special assertions, just make sure
+        // no crashe or exception occurs
+        System.out.println("testString1.hashCode() = " + testString1.hashCode());
+
+        // Check intern() method for "" string
+        String empty = "";
+        String empty_interned = empty.intern();
+        if (!wb.isShared(empty)) {
+           throw new RuntimeException("Empty string should be shared");
+        }
+        if (empty_interned != empty) {
+            throw new RuntimeException("Different string is returned from intern() for empty string");
+        }
+    }
+}