git.gag.com Git - debian/openrocket/blob - core/test/net/sf/openrocket/util/TextUtilTest.java

   1 package net.sf.openrocket.util;
   2
   3 import static java.lang.Math.PI;
   4 import static org.junit.Assert.assertEquals;
   5 import static org.junit.Assert.assertArrayEquals;
   6
   7 import java.nio.charset.Charset;
   8 import java.util.Random;
   9
  10 import org.junit.Test;
  11
  12 public class TextUtilTest {
  13
  14         @Test
  15         public void testConvertStringToBytes() {
  16
  17                 Charset us_ascii = Charset.forName("US-ASCII");
  18
  19                 byte[] ZIP_SIGNATURE_CORRECT = "PK".getBytes(us_ascii);
  20                 byte[] ZIP_SIGNATURE_TEST = TextUtil.convertStringToBytes( "PK", us_ascii);
  21
  22                 assertArrayEquals( ZIP_SIGNATURE_CORRECT, ZIP_SIGNATURE_TEST );
  23
  24                 byte[] OPENROCKET_SIGNATURE_CORRECT = "<openrocket".getBytes(us_ascii);
  25                 byte[] OPENROCKET_SIGNATURE_TEST = TextUtil.convertStringToBytes( "<openrocket", us_ascii);
  26
  27                 assertArrayEquals( OPENROCKET_SIGNATURE_CORRECT, OPENROCKET_SIGNATURE_TEST);
  28
  29                 byte[] ROCKSIM_SIGNATURE_CORRECT = "<RockSimDoc".getBytes(us_ascii);
  30                 byte[] ROCKSIM_SIGNATURE_TEST = TextUtil.convertStringToBytes( "<RockSimDoc", us_ascii);
  31
  32                 assertArrayEquals( ROCKSIM_SIGNATURE_CORRECT, ROCKSIM_SIGNATURE_TEST );
  33         }
  34
  35         @Test
  36         public void testHexString() {
  37                 assertEquals("", TextUtil.hexString(new byte[0]));
  38                 assertEquals("00", TextUtil.hexString(new byte[] { 0x00 }));
  39                 assertEquals("ff", TextUtil.hexString(new byte[] { (byte) 0xff }));
  40
  41                 for (int i = 0; i <= 0xff; i++) {
  42                         assertEquals(String.format("%02x", i), TextUtil.hexString(new byte[] { (byte) i }));
  43                 }
  44
  45                 assertEquals("0f1e2d3c4b5a6978", TextUtil.hexString(new byte[] {
  46                                 0x0f, 0x1e, 0x2d, 0x3c, 0x4b, 0x5a, 0x69, 0x78
  47                 }));
  48
  49                 Random rnd = new Random();
  50                 for (int count = 0; count < 10; count++) {
  51                         int n = rnd.nextInt(100);
  52                         byte[] bytes = new byte[n];
  53                         rnd.nextBytes(bytes);
  54                         StringBuilder sb = new StringBuilder();
  55                         for (byte b : bytes) {
  56                                 sb.append(String.format("%02x", b & 0xFF));
  57                         }
  58                         assertEquals(sb.toString(), TextUtil.hexString(bytes));
  59                 }
  60         }
  61
  62         @Test
  63         public void specialCaseTest() {
  64                 assertEquals("NaN", TextUtil.doubleToString(Double.NaN));
  65                 assertEquals("Inf", TextUtil.doubleToString(Double.POSITIVE_INFINITY));
  66                 assertEquals("-Inf", TextUtil.doubleToString(Double.NEGATIVE_INFINITY));
  67                 assertEquals("0", TextUtil.doubleToString(0.0));
  68                 assertEquals("0", TextUtil.doubleToString(MathUtil.EPSILON / 3));
  69                 assertEquals("0", TextUtil.doubleToString(-MathUtil.EPSILON / 3));
  70         }
  71
  72         @Test
  73         public void longTest() {
  74
  75                 assertEquals("3.1416e-5", TextUtil.doubleToString(PI * 1e-5));
  76                 assertEquals("3.1416e-4", TextUtil.doubleToString(PI * 1e-4));
  77                 assertEquals("0.0031416", TextUtil.doubleToString(PI * 1e-3));
  78                 assertEquals("0.031416", TextUtil.doubleToString(PI * 1e-2));
  79                 assertEquals("0.31416", TextUtil.doubleToString(PI * 1e-1));
  80                 assertEquals("3.1416", TextUtil.doubleToString(PI));
  81                 assertEquals("31.416", TextUtil.doubleToString(PI * 1e1));
  82                 assertEquals("314.16", TextUtil.doubleToString(PI * 1e2));
  83                 assertEquals("3141.6", TextUtil.doubleToString(PI * 1e3));
  84                 assertEquals("31416", TextUtil.doubleToString(PI * 1e4));
  85                 assertEquals("314159", TextUtil.doubleToString(PI * 1e5));
  86                 assertEquals("3141593", TextUtil.doubleToString(PI * 1e6));
  87                 assertEquals("31415927", TextUtil.doubleToString(PI * 1e7));
  88                 assertEquals("3.1416e8", TextUtil.doubleToString(PI * 1e8));
  89                 assertEquals("3.1416e9", TextUtil.doubleToString(PI * 1e9));
  90                 assertEquals("3.1416e10", TextUtil.doubleToString(PI * 1e10));
  91
  92                 assertEquals("-3.1416e-5", TextUtil.doubleToString(-PI * 1e-5));
  93                 assertEquals("-3.1416e-4", TextUtil.doubleToString(-PI * 1e-4));
  94                 assertEquals("-0.0031416", TextUtil.doubleToString(-PI * 1e-3));
  95                 assertEquals("-0.031416", TextUtil.doubleToString(-PI * 1e-2));
  96                 assertEquals("-0.31416", TextUtil.doubleToString(-PI * 1e-1));
  97                 assertEquals("-3.1416", TextUtil.doubleToString(-PI));
  98                 assertEquals("-31.416", TextUtil.doubleToString(-PI * 1e1));
  99                 assertEquals("-314.16", TextUtil.doubleToString(-PI * 1e2));
 100                 assertEquals("-3141.6", TextUtil.doubleToString(-PI * 1e3));
 101                 assertEquals("-31416", TextUtil.doubleToString(-PI * 1e4));
 102                 assertEquals("-314159", TextUtil.doubleToString(-PI * 1e5));
 103                 assertEquals("-3141593", TextUtil.doubleToString(-PI * 1e6));
 104                 assertEquals("-31415927", TextUtil.doubleToString(-PI * 1e7));
 105                 assertEquals("-3.1416e8", TextUtil.doubleToString(-PI * 1e8));
 106                 assertEquals("-3.1416e9", TextUtil.doubleToString(-PI * 1e9));
 107                 assertEquals("-3.1416e10", TextUtil.doubleToString(-PI * 1e10));
 108
 109         }
 110
 111         @Test
 112         public void shortTest() {
 113                 double p = 3.1;
 114                 assertEquals("3.1e-5", TextUtil.doubleToString(p * 1e-5));
 115                 assertEquals("3.1e-4", TextUtil.doubleToString(p * 1e-4));
 116                 assertEquals("0.0031", TextUtil.doubleToString(p * 1e-3));
 117                 assertEquals("0.031", TextUtil.doubleToString(p * 1e-2));
 118                 assertEquals("0.31", TextUtil.doubleToString(p * 1e-1));
 119                 assertEquals("3.1", TextUtil.doubleToString(p));
 120                 assertEquals("31", TextUtil.doubleToString(p * 1e1));
 121                 assertEquals("310", TextUtil.doubleToString(p * 1e2));
 122                 assertEquals("3100", TextUtil.doubleToString(p * 1e3));
 123                 assertEquals("31000", TextUtil.doubleToString(p * 1e4));
 124                 assertEquals("3.1e5", TextUtil.doubleToString(p * 1e5));
 125                 assertEquals("3.1e6", TextUtil.doubleToString(p * 1e6));
 126                 assertEquals("3.1e7", TextUtil.doubleToString(p * 1e7));
 127                 assertEquals("3.1e8", TextUtil.doubleToString(p * 1e8));
 128                 assertEquals("3.1e9", TextUtil.doubleToString(p * 1e9));
 129                 assertEquals("3.1e10", TextUtil.doubleToString(p * 1e10));
 130
 131                 assertEquals("-3.1e-5", TextUtil.doubleToString(-p * 1e-5));
 132                 assertEquals("-3.1e-4", TextUtil.doubleToString(-p * 1e-4));
 133                 assertEquals("-0.0031", TextUtil.doubleToString(-p * 1e-3));
 134                 assertEquals("-0.031", TextUtil.doubleToString(-p * 1e-2));
 135                 assertEquals("-0.31", TextUtil.doubleToString(-p * 1e-1));
 136                 assertEquals("-3.1", TextUtil.doubleToString(-p));
 137                 assertEquals("-31", TextUtil.doubleToString(-p * 1e1));
 138                 assertEquals("-310", TextUtil.doubleToString(-p * 1e2));
 139                 assertEquals("-3100", TextUtil.doubleToString(-p * 1e3));
 140                 assertEquals("-31000", TextUtil.doubleToString(-p * 1e4));
 141                 assertEquals("-3.1e5", TextUtil.doubleToString(-p * 1e5));
 142                 assertEquals("-3.1e6", TextUtil.doubleToString(-p * 1e6));
 143                 assertEquals("-3.1e7", TextUtil.doubleToString(-p * 1e7));
 144                 assertEquals("-3.1e8", TextUtil.doubleToString(-p * 1e8));
 145                 assertEquals("-3.1e9", TextUtil.doubleToString(-p * 1e9));
 146                 assertEquals("-3.1e10", TextUtil.doubleToString(-p * 1e10));
 147
 148                 p = 3;
 149                 assertEquals("3e-5", TextUtil.doubleToString(p * 1e-5));
 150                 assertEquals("3e-4", TextUtil.doubleToString(p * 1e-4));
 151                 assertEquals("3e-3", TextUtil.doubleToString(p * 1e-3));
 152                 assertEquals("0.03", TextUtil.doubleToString(p * 1e-2));
 153                 assertEquals("0.3", TextUtil.doubleToString(p * 1e-1));
 154                 assertEquals("3", TextUtil.doubleToString(p));
 155                 assertEquals("30", TextUtil.doubleToString(p * 1e1));
 156                 assertEquals("300", TextUtil.doubleToString(p * 1e2));
 157                 assertEquals("3e3", TextUtil.doubleToString(p * 1e3));
 158                 assertEquals("3e4", TextUtil.doubleToString(p * 1e4));
 159                 assertEquals("3e5", TextUtil.doubleToString(p * 1e5));
 160                 assertEquals("3e6", TextUtil.doubleToString(p * 1e6));
 161                 assertEquals("3e7", TextUtil.doubleToString(p * 1e7));
 162                 assertEquals("3e8", TextUtil.doubleToString(p * 1e8));
 163                 assertEquals("3e9", TextUtil.doubleToString(p * 1e9));
 164                 assertEquals("3e10", TextUtil.doubleToString(p * 1e10));
 165
 166                 assertEquals("-3e-5", TextUtil.doubleToString(-p * 1e-5));
 167                 assertEquals("-3e-4", TextUtil.doubleToString(-p * 1e-4));
 168                 assertEquals("-3e-3", TextUtil.doubleToString(-p * 1e-3));
 169                 assertEquals("-0.03", TextUtil.doubleToString(-p * 1e-2));
 170                 assertEquals("-0.3", TextUtil.doubleToString(-p * 1e-1));
 171                 assertEquals("-3", TextUtil.doubleToString(-p));
 172                 assertEquals("-30", TextUtil.doubleToString(-p * 1e1));
 173                 assertEquals("-300", TextUtil.doubleToString(-p * 1e2));
 174                 assertEquals("-3e3", TextUtil.doubleToString(-p * 1e3));
 175                 assertEquals("-3e4", TextUtil.doubleToString(-p * 1e4));
 176                 assertEquals("-3e5", TextUtil.doubleToString(-p * 1e5));
 177                 assertEquals("-3e6", TextUtil.doubleToString(-p * 1e6));
 178                 assertEquals("-3e7", TextUtil.doubleToString(-p * 1e7));
 179                 assertEquals("-3e8", TextUtil.doubleToString(-p * 1e8));
 180                 assertEquals("-3e9", TextUtil.doubleToString(-p * 1e9));
 181                 assertEquals("-3e10", TextUtil.doubleToString(-p * 1e10));
 182
 183         }
 184
 185         @Test
 186         public void roundingTest() {
 187
 188                 assertEquals("1.001", TextUtil.doubleToString(1.00096));
 189
 190
 191                 /*
 192                  * Not testing with 1.00015 because it might be changed during number formatting
 193                  * calculations.  Its rounding is basically arbitrary anyway.
 194                  */
 195
 196                 assertEquals("1.0002e-5", TextUtil.doubleToString(1.0001500001e-5));
 197                 assertEquals("1.0001e-5", TextUtil.doubleToString(1.0001499999e-5));
 198                 assertEquals("1.0002e-4", TextUtil.doubleToString(1.0001500001e-4));
 199                 assertEquals("1.0001e-4", TextUtil.doubleToString(1.0001499999e-4));
 200                 assertEquals("0.0010002", TextUtil.doubleToString(1.0001500001e-3));
 201                 assertEquals("0.0010001", TextUtil.doubleToString(1.0001499999e-3));
 202                 assertEquals("0.010002", TextUtil.doubleToString(1.0001500001e-2));
 203                 assertEquals("0.010001", TextUtil.doubleToString(1.0001499999e-2));
 204                 assertEquals("0.10002", TextUtil.doubleToString(1.0001500001e-1));
 205                 assertEquals("0.10001", TextUtil.doubleToString(1.0001499999e-1));
 206                 assertEquals("1.0002", TextUtil.doubleToString(1.0001500001));
 207                 assertEquals("1.0001", TextUtil.doubleToString(1.0001499999));
 208                 assertEquals("10.002", TextUtil.doubleToString(1.0001500001e1));
 209                 assertEquals("10.001", TextUtil.doubleToString(1.0001499999e1));
 210                 assertEquals("100.02", TextUtil.doubleToString(1.0001500001e2));
 211                 assertEquals("100.01", TextUtil.doubleToString(1.0001499999e2));
 212                 assertEquals("1000.2", TextUtil.doubleToString(1.0001500001e3));
 213                 assertEquals("1000.1", TextUtil.doubleToString(1.0001499999e3));
 214                 assertEquals("10002", TextUtil.doubleToString(1.0001500001e4));
 215                 assertEquals("10001", TextUtil.doubleToString(1.0001499999e4));
 216                 assertEquals("100012", TextUtil.doubleToString(1.00011500001e5));
 217                 assertEquals("100011", TextUtil.doubleToString(1.00011499999e5));
 218                 assertEquals("1000112", TextUtil.doubleToString(1.000111500001e6));
 219                 assertEquals("1000111", TextUtil.doubleToString(1.000111499999e6));
 220                 assertEquals("10001112", TextUtil.doubleToString(1.0001111500001e7));
 221                 assertEquals("10001111", TextUtil.doubleToString(1.0001111499999e7));
 222                 assertEquals("1.0002e8", TextUtil.doubleToString(1.0001500001e8));
 223                 assertEquals("1.0001e8", TextUtil.doubleToString(1.0001499999e8));
 224                 assertEquals("1.0002e9", TextUtil.doubleToString(1.0001500001e9));
 225                 assertEquals("1.0001e9", TextUtil.doubleToString(1.0001499999e9));
 226                 assertEquals("1.0002e10", TextUtil.doubleToString(1.0001500001e10));
 227                 assertEquals("1.0001e10", TextUtil.doubleToString(1.0001499999e10));
 228
 229
 230                 assertEquals("-1.0002e-5", TextUtil.doubleToString(-1.0001500001e-5));
 231                 assertEquals("-1.0001e-5", TextUtil.doubleToString(-1.0001499999e-5));
 232                 assertEquals("-1.0002e-4", TextUtil.doubleToString(-1.0001500001e-4));
 233                 assertEquals("-1.0001e-4", TextUtil.doubleToString(-1.0001499999e-4));
 234                 assertEquals("-0.0010002", TextUtil.doubleToString(-1.0001500001e-3));
 235                 assertEquals("-0.0010001", TextUtil.doubleToString(-1.0001499999e-3));
 236                 assertEquals("-0.010002", TextUtil.doubleToString(-1.0001500001e-2));
 237                 assertEquals("-0.010001", TextUtil.doubleToString(-1.0001499999e-2));
 238                 assertEquals("-0.10002", TextUtil.doubleToString(-1.0001500001e-1));
 239                 assertEquals("-0.10001", TextUtil.doubleToString(-1.0001499999e-1));
 240                 assertEquals("-1.0002", TextUtil.doubleToString(-1.0001500001));
 241                 assertEquals("-1.0001", TextUtil.doubleToString(-1.0001499999));
 242                 assertEquals("-10.002", TextUtil.doubleToString(-1.0001500001e1));
 243                 assertEquals("-10.001", TextUtil.doubleToString(-1.0001499999e1));
 244                 assertEquals("-100.02", TextUtil.doubleToString(-1.0001500001e2));
 245                 assertEquals("-100.01", TextUtil.doubleToString(-1.0001499999e2));
 246                 assertEquals("-1000.2", TextUtil.doubleToString(-1.0001500001e3));
 247                 assertEquals("-1000.1", TextUtil.doubleToString(-1.0001499999e3));
 248                 assertEquals("-10002", TextUtil.doubleToString(-1.0001500001e4));
 249                 assertEquals("-10001", TextUtil.doubleToString(-1.0001499999e4));
 250                 assertEquals("-100012", TextUtil.doubleToString(-1.00011500001e5));
 251                 assertEquals("-100011", TextUtil.doubleToString(-1.00011499999e5));
 252                 assertEquals("-1000112", TextUtil.doubleToString(-1.000111500001e6));
 253                 assertEquals("-1000111", TextUtil.doubleToString(-1.000111499999e6));
 254                 assertEquals("-10001112", TextUtil.doubleToString(-1.0001111500001e7));
 255                 assertEquals("-10001111", TextUtil.doubleToString(-1.0001111499999e7));
 256                 assertEquals("-1.0002e8", TextUtil.doubleToString(-1.0001500001e8));
 257                 assertEquals("-1.0001e8", TextUtil.doubleToString(-1.0001499999e8));
 258                 assertEquals("-1.0002e9", TextUtil.doubleToString(-1.0001500001e9));
 259                 assertEquals("-1.0001e9", TextUtil.doubleToString(-1.0001499999e9));
 260                 assertEquals("-1.0002e10", TextUtil.doubleToString(-1.0001500001e10));
 261                 assertEquals("-1.0001e10", TextUtil.doubleToString(-1.0001499999e10));
 262
 263         }
 264
 265
 266         @Test
 267         public void randomTest() {
 268                 for (int i = 0; i < 10000; i++) {
 269                         double orig = Math.random();
 270                         double result;
 271                         double expected = Math.rint(orig * 100000) / 100000.0;
 272
 273                         if (orig < 0.1)
 274                                 continue;
 275                         String s = TextUtil.doubleToString(orig);
 276                         result = Double.parseDouble(s);
 277                         assertEquals(expected, result, 0.00000001);
 278                 }
 279         }
 280
 281 }