1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
|
/*
* Copyright (c) 2018, 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.
*/
import java.util.stream.Collectors;
import java.util.stream.IntStream;
/**
* @test
* @summary Basic isBlank functionality
* @bug 8200436
* @run main/othervm IsBlank
*/
public class IsBlank {
public static void main(String... arg) {
testIsBlank();
testWhitespace();
}
/*
* Test with strings
*/
static void testIsBlank() {
test("", true);
test(" ", true);
test(" \t", true);
test(" \u1680", true);
test(" abc ", false);
test(" abc\u2022", false);
}
/*
* Test full whitespace range
*/
static void testWhitespace() {
StringBuilder sb = new StringBuilder(64);
IntStream.range(1, 0xFFFF).filter(c -> Character.isWhitespace(c))
.forEach(c -> sb.append((char)c));
String whiteSpace = sb.toString();
test(whiteSpace, true);
test(whiteSpace + "abc" + whiteSpace, false);
}
/*
* Raise an exception if the two inputs are not equivalent.
*/
static void test(String input, boolean expected) {
if (input.isBlank() != expected) {
System.err.format("Failed test, Input: %s, Expected: %b%n", input, expected);
throw new RuntimeException();
}
}
}
|
