1 /* |
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2 * Copyright (c) 2018, Oracle and/or its affiliates. All rights reserved. |
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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4 * |
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5 * This code is free software; you can redistribute it and/or modify it |
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6 * under the terms of the GNU General Public License version 2 only, as |
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7 * published by the Free Software Foundation. |
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8 * |
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9 * This code is distributed in the hope that it will be useful, but WITHOUT |
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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12 * version 2 for more details (a copy is included in the LICENSE file that |
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13 * accompanied this code). |
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14 * |
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15 * You should have received a copy of the GNU General Public License version |
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16 * 2 along with this work; if not, write to the Free Software Foundation, |
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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18 * |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
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22 */ |
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23 |
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24 /* |
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25 * @test |
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26 * @summary Unit tests for String#align and String#indent |
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27 * @run main AlignIndent |
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28 */ |
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29 |
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30 import java.util.Arrays; |
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31 import java.util.List; |
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32 import java.util.stream.Collectors; |
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33 import java.util.stream.Stream; |
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34 |
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35 public class AlignIndent { |
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36 static final List<String> ENDS = List.of("", "\n", " \n", "\n\n", "\n\n\n"); |
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37 static final List<String> MIDDLES = List.of( |
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38 "", |
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39 "xyz", |
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40 " xyz", |
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41 " xyz", |
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42 "xyz ", |
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43 " xyz ", |
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44 " xyz ", |
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45 "xyz\u2022", |
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46 " xyz\u2022", |
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47 "xyz\u2022 ", |
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48 " xyz\u2022 ", |
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49 " // comment" |
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50 ); |
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51 |
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52 public static void main(String[] args) { |
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53 test1(); |
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54 test2(); |
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55 test3(); |
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56 test4(); |
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57 } |
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58 |
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59 /* |
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60 * Test String#align() functionality. |
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61 */ |
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62 static void test1() { |
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63 for (String prefix : ENDS) { |
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64 for (String suffix : ENDS) { |
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65 for (String middle : MIDDLES) { |
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66 { |
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67 String input = prefix + " abc \n" + middle + "\n def \n" + suffix; |
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68 String output = input.align(); |
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69 |
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70 String[] inLines = input.split("\\R"); |
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71 String[] outLines = output.split("\\R"); |
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72 |
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73 String[] inLinesBody = getBody(inLines); |
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74 |
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75 if (inLinesBody.length < outLines.length) { |
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76 report("String::align()", "Result has more lines than expected", input, output); |
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77 } else if (inLinesBody.length > outLines.length) { |
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78 report("String::align()", "Result has fewer lines than expected", input, output); |
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79 } |
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80 |
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81 int indent = -1; |
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82 for (int i = 0; i < inLinesBody.length; i++) { |
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83 String in = inLinesBody[i]; |
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84 String out = outLines[i]; |
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85 if (!out.isBlank()) { |
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86 int offset = in.indexOf(out); |
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87 if (offset == -1) { |
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88 report("String::align()", "Portions of line are missing", input, output); |
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89 } |
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90 if (indent == -1) { |
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91 indent = offset; |
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92 } else if (offset != indent) { |
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93 report("String::align()", |
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94 "Inconsistent indentation in result", input, output); |
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95 } |
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96 } |
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97 } |
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98 } |
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99 } |
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100 } |
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101 } |
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102 } |
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103 |
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104 /* |
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105 * Test String#align(int n) functionality. |
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106 */ |
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107 static void test2() { |
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108 for (int adjust : new int[] {-8, -7, -4, -3, -2, -1, 0, 1, 2, 3, 4, 7, 8}) { |
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109 for (String prefix : ENDS) { |
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110 for (String suffix : ENDS) { |
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111 for (String middle : MIDDLES) { |
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112 { |
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113 String input = prefix + " abc \n" + middle + "\n def \n" + suffix; |
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114 String output = input.align(adjust); |
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115 String expected = input.align().indent(adjust); |
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116 |
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117 if (!output.equals(expected)) { |
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118 report("String::align(int n)", |
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119 "Result inconsistent with align().indent(n)", expected, output); |
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120 } |
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121 } |
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122 } |
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123 } |
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124 } |
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125 } |
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126 } |
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127 |
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128 /* |
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129 * Test String#indent(int n) functionality. |
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130 */ |
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131 static void test3() { |
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132 for (int adjust : new int[] {-8, -7, -4, -3, -2, -1, 0, 1, 2, 3, 4, 7, 8}) { |
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133 for (String prefix : ENDS) { |
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134 for (String suffix : ENDS) { |
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135 for (String middle : MIDDLES) { |
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136 String input = prefix + " abc \n" + middle + "\n def \n" + suffix; |
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137 String output = input.indent(adjust); |
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138 |
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139 Stream<String> stream = input.lines(); |
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140 if (adjust > 0) { |
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141 final String spaces = " ".repeat(adjust); |
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142 stream = stream.map(s -> s.isBlank() ? s : spaces + s); |
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143 } else if (adjust < 0) { |
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144 stream = stream.map(s -> s.substring(Math.min(-adjust, indexOfNonWhitespace(s)))); |
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145 } |
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146 String expected = stream.collect(Collectors.joining("\n", "", "\n")); |
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147 |
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148 if (!output.equals(expected)) { |
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149 report("String::indent(int n)", |
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150 "Result indentation not as expected", expected, output); |
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151 } |
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152 } |
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153 } |
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154 } |
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155 } |
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156 } |
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157 |
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158 /* |
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159 * JDK-8212694: Using Raw String Literals with align() and Integer.MIN_VALUE causes out of memory error |
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160 */ |
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161 static void test4() { |
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162 try { |
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163 String str = "\n A\n".align(Integer.MIN_VALUE); |
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164 } catch (OutOfMemoryError ex) { |
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165 System.err.println("align(Integer.MIN_VALUE) not clipping indentation"); |
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166 throw new RuntimeException(); |
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167 } |
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168 } |
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169 |
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170 public static int indexOfNonWhitespace(String s) { |
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171 int left = 0; |
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172 while (left < s.length()) { |
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173 char ch = s.charAt(left); |
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174 if (ch != ' ' && ch != '\t' && !Character.isWhitespace(ch)) { |
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175 break; |
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176 } |
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177 left++; |
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178 } |
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179 return left; |
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180 } |
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181 |
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182 |
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183 private static String[] getBody(String[] inLines) { |
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184 int from = -1, to = -1; |
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185 for (int i = 0; i < inLines.length; i++) { |
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186 String line = inLines[i]; |
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187 if (!line.isBlank()) { |
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188 if (from == -1) { |
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189 from = i; |
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190 } |
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191 to = i + 1; |
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192 } |
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193 } |
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194 return Arrays.copyOfRange(inLines, from, to); |
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195 } |
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196 |
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197 /* |
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198 * Report difference in result. |
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199 */ |
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200 static void report(String test, String message, String input, String output) { |
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201 System.err.println("Testing " + test + ": " + message); |
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202 System.err.println(); |
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203 System.err.println("Input: length = " + input.length()); |
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204 System.err.println("_".repeat(40)); |
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205 System.err.print(input.replaceAll(" ", ".")); |
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206 System.err.println("_".repeat(40)); |
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207 System.err.println(); |
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208 System.err.println("Output: length = " + output.length()); |
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209 System.err.println("_".repeat(40)); |
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210 System.err.print(output.replaceAll(" ", ".")); |
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211 System.err.println("_".repeat(40)); |
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212 throw new RuntimeException(); |
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213 } |
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214 } |
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