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
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
|
/*
* 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.
*/
/*
* @test
* @summary Unit tests for String#indent
* @run main Indent
*/
import java.util.Arrays;
import java.util.List;
import java.util.stream.Collectors;
import java.util.stream.Stream;
public class Indent {
static final List<String> ENDS = List.of("", "\n", " \n", "\n\n", "\n\n\n");
static final List<String> MIDDLES = List.of(
"",
"xyz",
" xyz",
" xyz",
"xyz ",
" xyz ",
" xyz ",
"xyz\u2022",
" xyz\u2022",
"xyz\u2022 ",
" xyz\u2022 ",
" // comment"
);
public static void main(String[] args) {
test1();
}
/*
* Test String#indent(int n) functionality.
*/
static void test1() {
for (int adjust : new int[] {-8, -7, -4, -3, -2, -1, 0, 1, 2, 3, 4, 7, 8}) {
for (String prefix : ENDS) {
for (String suffix : ENDS) {
for (String middle : MIDDLES) {
String input = prefix + " abc \n" + middle + "\n def \n" + suffix;
String output = input.indent(adjust);
Stream<String> stream = input.lines();
if (adjust > 0) {
final String spaces = " ".repeat(adjust);
stream = stream.map(s -> spaces + s);
} else if (adjust < 0) {
stream = stream.map(s -> s.substring(Math.min(-adjust, indexOfNonWhitespace(s))));
}
String expected = stream.collect(Collectors.joining("\n", "", "\n"));
if (!output.equals(expected)) {
report("String::indent(int n)",
"Result indentation not as expected", expected, output);
}
}
}
}
}
}
public static int indexOfNonWhitespace(String s) {
int left = 0;
while (left < s.length()) {
char ch = s.charAt(left);
if (ch != ' ' && ch != '\t' && !Character.isWhitespace(ch)) {
break;
}
left++;
}
return left;
}
private static String[] getBody(String[] inLines) {
int from = -1, to = -1;
for (int i = 0; i < inLines.length; i++) {
String line = inLines[i];
if (!line.isBlank()) {
if (from == -1) {
from = i;
}
to = i + 1;
}
}
return Arrays.copyOfRange(inLines, from, to);
}
/*
* Report difference in result.
*/
static void report(String test, String message, String input, String output) {
System.err.println("Testing " + test + ": " + message);
System.err.println();
System.err.println("Input: length = " + input.length());
System.err.println("_".repeat(40));
System.err.print(input.replaceAll(" ", "."));
System.err.println("_".repeat(40));
System.err.println();
System.err.println("Output: length = " + output.length());
System.err.println("_".repeat(40));
System.err.print(output.replaceAll(" ", "."));
System.err.println("_".repeat(40));
throw new RuntimeException();
}
}
|
