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 package test.java.lang.String;
24 
25 /*
26  * @test
27  * @bug 8223780
28  * @summary This exercises String#translateEscapes patterns and limits.
29  * @compile TranslateEscapes.java
30  * @run main TranslateEscapes
31  */
32 
33 import org.testng.annotations.Test;
34 import static org.testng.Assert.assertEquals;
35 import static org.testng.Assert.assertTrue;
36 import static org.testng.Assert.fail;
37 
38 public class TranslateEscapes {
39 
40     @Test
testStandardEscapes()41     public void testStandardEscapes() {
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     @Test
testOctalEscapes()53     public void testOctalEscapes() {
54         verifyOctalEscape("0", 0);
55         verifyOctalEscape("3", 03);
56         verifyOctalEscape("7", 07);
57         verifyOctalEscape("07", 07);
58         verifyOctalEscape("17", 017);
59         verifyOctalEscape("27", 027);
60         verifyOctalEscape("37", 037);
61         verifyOctalEscape("377", 0377);
62 
63         verifyOctalEscape("777", 077);
64         verifyOctalEscape("78", 07);
65     }
66 
67     @Test
testExceptions()68     static void testExceptions() {
69         exceptionThrown("+");
70         exceptionThrown("q");
71     }
72 
73     @Test
testEscapeLineTerminator()74     public void testEscapeLineTerminator() {
75         verifyLineTerminator("\n");
76         verifyLineTerminator("\r\n");
77         verifyLineTerminator("\r");
78     }
79 
verifyEscape(String string, char ch)80     static void verifyEscape(String string, char ch) {
81         String escapes = "\\" + string;
82         assertEquals(escapes.translateEscapes().charAt(0), ch,
83             String.format("\"%s\" not escape \"%s\"'%n", string, escapes));
84     }
85 
verifyOctalEscape(String string, int octal)86     static void verifyOctalEscape(String string, int octal) {
87         String escapes = "\\" + string;
88         assertEquals(escapes.translateEscapes().charAt(0), octal,
89             String.format("\"%s\" not octal %o%n", string, octal));
90     }
91 
exceptionThrown(String string)92     static void exceptionThrown(String string) {
93         String escapes = "\\" + string;
94         try {
95             escapes.translateEscapes();
96             fail(String.format("escape not thrown for %s%n", string));
97         } catch (IllegalArgumentException ex) {
98             // okay
99         }
100     }
101 
verifyLineTerminator(String string)102     static void verifyLineTerminator(String string) {
103         String escapes = "\\" + string;
104         assertTrue(escapes.translateEscapes().isEmpty(),
105             String.format("escape for line terminator not handled %s%n",
106                            string.replace("\n", "\\n").replace("\r", "\\r")));
107     }
108 }
109