1 /*

     2  * Copyright (c) 2019, Oracle and/or its affiliates. All rights reserved.

     3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

     4  *

     5  * This code is free software; you can redistribute it and/or modify it

     6  * under the terms of the GNU General Public License version 2 only, as

     7  * published by the Free Software Foundation.

     8  *

     9  * This code is distributed in the hope that it will be useful, but WITHOUT

    10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

    11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

    12  * version 2 for more details (a copy is included in the LICENSE file that

    13  * accompanied this code).

    14  *

    15  * You should have received a copy of the GNU General Public License version

    16  * 2 along with this work; if not, write to the Free Software Foundation,

    17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

    18  *

    19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

    20  * or visit www.oracle.com if you need additional information or have any

    21  * questions.

    22  */

    23 

    24 /*

    25  * @test

    26  * @bug 8223780

    27  * @summary This exercises String#translateEscapes patterns and limits.

    28  * @run main TranslateEscapes

    29  */

    30 

    31 public class TranslateEscapes {

    32     public static void main(String... arg) {

    33         test1();

    34         test2();

    35         test3();

    36     }

    37 

    38     /*

    39      * Standard escapes.

    40      */

    41     static void test1() {

    42         verifyEscape("b", '\b');

    43         verifyEscape("f", '\f');

    44         verifyEscape("n", '\n');

    45         verifyEscape("r", '\r');

    46         verifyEscape("t", '\t');

    47         verifyEscape("'", '\'');

    48         verifyEscape("\"", '\"');

    49         verifyEscape("\\", '\\');

    50     }

    51 

    52     /*

    53      * Octal escapes.

    54      */

    55     static void test2() {

    56         verifyOctalEscape("0", 0);

    57         verifyOctalEscape("3", 03);

    58         verifyOctalEscape("7", 07);

    59         verifyOctalEscape("07", 07);

    60         verifyOctalEscape("17", 017);

    61         verifyOctalEscape("27", 027);

    62         verifyOctalEscape("37", 037);

    63         verifyOctalEscape("377", 0377);

    64 

    65         verifyOctalEscape("777", 077);

    66         verifyOctalEscape("78", 07);

    67     }

    68 

    69     /*

    70      * Exceptions.

    71      */

    72     static void test3() {

    73         exceptionThrown("+");

    74         exceptionThrown("\n");

    75     }

    76 

    77     static void verifyEscape(String string, char ch) {

    78         String escapes = "\\" + string;

    79         if (escapes.translateEscapes().charAt(0) != ch) {

    80             System.err.format("\"%s\" not escape \"%s\"'%n", string, escapes);

    81             throw new RuntimeException();

    82         }

    83     }

    84 

    85     static void verifyOctalEscape(String string, int octal) {

    86         String escapes = "\\" + string;

    87         if (escapes.translateEscapes().charAt(0) != octal) {

    88             System.err.format("\"%s\" not octal %o%n", string, octal);

    89             throw new RuntimeException();

    90         }

    91     }

    92 

    93     static void exceptionThrown(String string) {

    94         String escapes = "\\" + string;

    95         try {

    96             escapes.translateEscapes();

    97             System.err.format("escape not thrown for %s%n", string);

    98             throw new RuntimeException();

    99 

   100         } catch (IllegalArgumentException ex) {

   101             // okay

   102         }

   103     }

   104 }