net.mograsim.logic.core/src/net/mograsim/logic/core/tests/ComponentTest.java

   1 package net.mograsim.logic.core.tests;
   2
   3 import static org.junit.jupiter.api.Assertions.assertArrayEquals;
   4 import static org.junit.jupiter.api.Assertions.assertEquals;
   5 import static org.junit.jupiter.api.Assertions.fail;
   6
   7 import java.util.function.LongConsumer;
   8
   9 import org.junit.jupiter.api.Test;
  10
  11 import net.mograsim.logic.core.components.Connector;
  12 import net.mograsim.logic.core.components.Demux;
  13 import net.mograsim.logic.core.components.Merger;
  14 import net.mograsim.logic.core.components.Mux;
  15 import net.mograsim.logic.core.components.Splitter;
  16 import net.mograsim.logic.core.components.TriStateBuffer;
  17 import net.mograsim.logic.core.components.gates.AndGate;
  18 import net.mograsim.logic.core.components.gates.NandGate;
  19 import net.mograsim.logic.core.components.gates.NorGate;
  20 import net.mograsim.logic.core.components.gates.NotGate;
  21 import net.mograsim.logic.core.components.gates.OrGate;
  22 import net.mograsim.logic.core.components.gates.XorGate;
  23 import net.mograsim.logic.core.timeline.Timeline;
  24 import net.mograsim.logic.core.types.Bit;
  25 import net.mograsim.logic.core.types.BitVector;
  26 import net.mograsim.logic.core.wires.Wire;
  27 import net.mograsim.logic.core.wires.Wire.ReadEnd;
  28 import net.mograsim.logic.core.wires.Wire.ReadWriteEnd;
  29
  30 @SuppressWarnings("unused")
  31 class ComponentTest
  32 {
  33         private Timeline t = new Timeline(11);
  34
  35         @Test
  36         void circuitExampleTest()
  37         {
  38                 Wire a = new Wire(t, 1, 1), b = new Wire(t, 1, 1), c = new Wire(t, 1, 10), d = new Wire(t, 2, 1), e = new Wire(t, 1, 1),
  39                                 f = new Wire(t, 1, 1), g = new Wire(t, 1, 1), h = new Wire(t, 2, 1), i = new Wire(t, 2, 1), j = new Wire(t, 1, 1),
  40                                 k = new Wire(t, 1, 1);
  41                 new AndGate(t, 1, f.createReadWriteEnd(), a.createReadOnlyEnd(), b.createReadOnlyEnd());
  42                 new NotGate(t, 1, f.createReadOnlyEnd(), g.createReadWriteEnd());
  43                 new Merger(t, h.createReadWriteEnd(), c.createReadOnlyEnd(), g.createReadOnlyEnd());
  44                 new Mux(t, 1, i.createReadWriteEnd(), e.createReadOnlyEnd(), h.createReadOnlyEnd(), d.createReadOnlyEnd());
  45                 new Splitter(t, i.createReadOnlyEnd(), k.createReadWriteEnd(), j.createReadWriteEnd());
  46
  47                 a.createReadWriteEnd().feedSignals(Bit.ZERO);
  48                 b.createReadWriteEnd().feedSignals(Bit.ONE);
  49                 c.createReadWriteEnd().feedSignals(Bit.ZERO);
  50                 d.createReadWriteEnd().feedSignals(Bit.ONE, Bit.ONE);
  51                 e.createReadWriteEnd().feedSignals(Bit.ZERO);
  52
  53                 t.executeAll();
  54
  55                 assertEquals(Bit.ONE, j.getValue());
  56                 assertEquals(Bit.ZERO, k.getValue());
  57         }
  58
  59         @Test
  60         void splitterTest()
  61         {
  62                 t.reset();
  63                 Wire a = new Wire(t, 3, 1), b = new Wire(t, 2, 1), c = new Wire(t, 3, 1), in = new Wire(t, 8, 1);
  64                 in.createReadWriteEnd().feedSignals(Bit.ZERO, Bit.ONE, Bit.ZERO, Bit.ONE, Bit.ZERO, Bit.ONE, Bit.ZERO, Bit.ONE);
  65                 new Splitter(t, in.createReadOnlyEnd(), a.createReadWriteEnd(), b.createReadWriteEnd(), c.createReadWriteEnd());
  66
  67                 t.executeAll();
  68
  69                 assertBitArrayEquals(a.getValues(), Bit.ZERO, Bit.ONE, Bit.ZERO);
  70                 assertBitArrayEquals(b.getValues(), Bit.ONE, Bit.ZERO);
  71                 assertBitArrayEquals(c.getValues(), Bit.ONE, Bit.ZERO, Bit.ONE);
  72         }
  73
  74         @Test
  75         void mergerTest()
  76         {
  77                 t.reset();
  78                 Wire a = new Wire(t, 3, 1), b = new Wire(t, 2, 1), c = new Wire(t, 3, 1), out = new Wire(t, 8, 1);
  79                 a.createReadWriteEnd().feedSignals(Bit.ZERO, Bit.ONE, Bit.ZERO);
  80                 b.createReadWriteEnd().feedSignals(Bit.ONE, Bit.ZERO);
  81                 c.createReadWriteEnd().feedSignals(Bit.ONE, Bit.ZERO, Bit.ONE);
  82
  83                 new Merger(t, out.createReadWriteEnd(), a.createReadOnlyEnd(), b.createReadOnlyEnd(), c.createReadOnlyEnd());
  84
  85                 t.executeAll();
  86
  87                 assertBitArrayEquals(out.getValues(), Bit.ZERO, Bit.ONE, Bit.ZERO, Bit.ONE, Bit.ZERO, Bit.ONE, Bit.ZERO, Bit.ONE);
  88         }
  89
  90         @Test
  91         void triStateBufferTest()
  92         {
  93                 Wire a = new Wire(t, 1, 1), b = new Wire(t, 1, 1), en = new Wire(t, 1, 1), notEn = new Wire(t, 1, 1);
  94                 new NotGate(t, 1, en.createReadOnlyEnd(), notEn.createReadWriteEnd());
  95                 new TriStateBuffer(t, 1, a.createReadOnlyEnd(), b.createReadWriteEnd(), en.createReadOnlyEnd());
  96                 new TriStateBuffer(t, 1, b.createReadOnlyEnd(), a.createReadWriteEnd(), notEn.createReadOnlyEnd());
  97
  98                 ReadWriteEnd enI = en.createReadWriteEnd(), aI = a.createReadWriteEnd(), bI = b.createReadWriteEnd();
  99                 enI.feedSignals(Bit.ONE);
 100                 aI.feedSignals(Bit.ONE);
 101                 bI.feedSignals(Bit.Z);
 102
 103                 t.executeAll();
 104
 105                 assertEquals(Bit.ONE, b.getValue());
 106
 107                 bI.feedSignals(Bit.ZERO);
 108
 109                 t.executeAll();
 110
 111                 assertEquals(Bit.X, b.getValue());
 112                 assertEquals(Bit.ONE, a.getValue());
 113
 114                 aI.clearSignals();
 115                 enI.feedSignals(Bit.ZERO);
 116
 117                 t.executeAll();
 118
 119                 assertEquals(Bit.ZERO, a.getValue());
 120
 121         }
 122
 123         @Test
 124         void muxTest()
 125         {
 126                 t.reset();
 127                 Wire a = new Wire(t, 4, 3), b = new Wire(t, 4, 6), c = new Wire(t, 4, 4), select = new Wire(t, 2, 5), out = new Wire(t, 4, 1);
 128                 ReadWriteEnd selectIn = select.createReadWriteEnd();
 129
 130                 selectIn.feedSignals(Bit.ZERO, Bit.ZERO);
 131                 a.createReadWriteEnd().feedSignals(Bit.ONE, Bit.ZERO, Bit.ONE, Bit.ZERO);
 132                 c.createReadWriteEnd().feedSignals(Bit.ZERO, Bit.ONE, Bit.ZERO, Bit.ONE);
 133
 134                 new Mux(t, 1, out.createReadWriteEnd(), select.createReadOnlyEnd(), a.createReadOnlyEnd(), b.createReadOnlyEnd(),
 135                                 c.createReadOnlyEnd());
 136                 t.executeAll();
 137
 138                 assertBitArrayEquals(out.getValues(), Bit.ONE, Bit.ZERO, Bit.ONE, Bit.ZERO);
 139                 selectIn.feedSignals(Bit.ZERO, Bit.ONE);
 140                 t.executeAll();
 141
 142                 assertBitArrayEquals(out.getValues(), Bit.ZERO, Bit.ONE, Bit.ZERO, Bit.ONE);
 143
 144                 selectIn.feedSignals(Bit.ONE, Bit.ONE);
 145                 t.executeAll();
 146
 147                 assertBitArrayEquals(out.getValues(), Bit.Z, Bit.Z, Bit.Z, Bit.Z);
 148
 149         }
 150
 151         @Test
 152         void demuxTest()
 153         {
 154                 t.reset();
 155                 Wire a = new Wire(t, 4, 3), b = new Wire(t, 4, 6), c = new Wire(t, 4, 4), select = new Wire(t, 2, 5), in = new Wire(t, 4, 1);
 156                 ReadWriteEnd selectIn = select.createReadWriteEnd();
 157
 158                 selectIn.feedSignals(Bit.ZERO, Bit.ZERO);
 159                 in.createReadWriteEnd().feedSignals(Bit.ONE, Bit.ZERO, Bit.ONE, Bit.ZERO);
 160
 161                 new Demux(t, 1, in.createReadOnlyEnd(), select.createReadOnlyEnd(), a.createReadWriteEnd(), b.createReadWriteEnd(),
 162                                 c.createReadWriteEnd());
 163                 t.executeAll();
 164
 165                 assertBitArrayEquals(a.getValues(), Bit.ONE, Bit.ZERO, Bit.ONE, Bit.ZERO);
 166                 assertBitArrayEquals(b.getValues(), Bit.U, Bit.U, Bit.U, Bit.U);
 167                 assertBitArrayEquals(c.getValues(), Bit.U, Bit.U, Bit.U, Bit.U);
 168                 selectIn.feedSignals(Bit.ZERO, Bit.ONE);
 169                 t.executeAll();
 170
 171                 assertBitArrayEquals(a.getValues(), Bit.Z, Bit.Z, Bit.Z, Bit.Z);
 172                 assertBitArrayEquals(b.getValues(), Bit.U, Bit.U, Bit.U, Bit.U);
 173                 assertBitArrayEquals(c.getValues(), Bit.ONE, Bit.ZERO, Bit.ONE, Bit.ZERO);
 174
 175                 selectIn.feedSignals(Bit.ONE, Bit.ONE);
 176                 t.executeAll();
 177
 178                 assertBitArrayEquals(a.getValues(), Bit.Z, Bit.Z, Bit.Z, Bit.Z);
 179                 assertBitArrayEquals(b.getValues(), Bit.U, Bit.U, Bit.U, Bit.U);
 180                 assertBitArrayEquals(c.getValues(), Bit.Z, Bit.Z, Bit.Z, Bit.Z);
 181
 182         }
 183
 184         @Test
 185         void andTest()
 186         {
 187                 t.reset();
 188                 Wire a = new Wire(t, 4, 1), b = new Wire(t, 4, 3), c = new Wire(t, 4, 1);
 189                 new AndGate(t, 1, c.createReadWriteEnd(), a.createReadOnlyEnd(), b.createReadOnlyEnd());
 190                 a.createReadWriteEnd().feedSignals(Bit.ONE, Bit.ONE, Bit.ZERO, Bit.ZERO);
 191                 b.createReadWriteEnd().feedSignals(Bit.ZERO, Bit.ONE, Bit.ZERO, Bit.ONE);
 192
 193                 t.executeAll();
 194
 195                 assertBitArrayEquals(c.getValues(), Bit.ZERO, Bit.ONE, Bit.ZERO, Bit.ZERO);
 196         }
 197
 198         @Test
 199         void orTest()
 200         {
 201                 t.reset();
 202                 Wire a = new Wire(t, 4, 1), b = new Wire(t, 4, 3), c = new Wire(t, 4, 1);
 203                 new OrGate(t, 1, c.createReadWriteEnd(), a.createReadOnlyEnd(), b.createReadOnlyEnd());
 204                 a.createReadWriteEnd().feedSignals(Bit.ONE, Bit.ONE, Bit.ZERO, Bit.ZERO);
 205                 b.createReadWriteEnd().feedSignals(Bit.ZERO, Bit.ONE, Bit.ZERO, Bit.ONE);
 206
 207                 t.executeAll();
 208
 209                 assertBitArrayEquals(c.getValues(), Bit.ONE, Bit.ONE, Bit.ZERO, Bit.ONE);
 210         }
 211
 212         @Test
 213         void nandTest()
 214         {
 215                 t.reset();
 216                 Wire a = new Wire(t, 4, 1), b = new Wire(t, 4, 3), c = new Wire(t, 4, 1), d = new Wire(t, 4, 1);
 217                 new NandGate(t, 1, d.createReadWriteEnd(), a.createReadOnlyEnd(), b.createReadOnlyEnd(), c.createReadOnlyEnd());
 218                 a.createReadWriteEnd().feedSignals(Bit.ONE, Bit.ONE, Bit.ZERO, Bit.ZERO);
 219                 b.createReadWriteEnd().feedSignals(Bit.ZERO, Bit.ONE, Bit.ZERO, Bit.ONE);
 220                 c.createReadWriteEnd().feedSignals(Bit.ONE, Bit.ONE, Bit.ZERO, Bit.ZERO);
 221
 222                 t.executeAll();
 223
 224                 assertBitArrayEquals(d.getValues(), Bit.ONE, Bit.ZERO, Bit.ONE, Bit.ONE);
 225         }
 226
 227         @Test
 228         void norTest()
 229         {
 230                 t.reset();
 231                 Wire a = new Wire(t, 4, 1), b = new Wire(t, 4, 3), c = new Wire(t, 4, 1), d = new Wire(t, 4, 1);
 232                 new NorGate(t, 1, d.createReadWriteEnd(), a.createReadOnlyEnd(), b.createReadOnlyEnd(), c.createReadOnlyEnd());
 233                 a.createReadWriteEnd().feedSignals(Bit.ONE, Bit.ONE, Bit.ZERO, Bit.ZERO);
 234                 b.createReadWriteEnd().feedSignals(Bit.ZERO, Bit.ONE, Bit.ZERO, Bit.ONE);
 235                 c.createReadWriteEnd().feedSignals(Bit.ONE, Bit.ONE, Bit.ZERO, Bit.ZERO);
 236
 237                 t.executeAll();
 238
 239                 assertBitArrayEquals(d.getValues(), Bit.ZERO, Bit.ZERO, Bit.ONE, Bit.ZERO);
 240         }
 241
 242         @Test
 243         void xorTest()
 244         {
 245                 t.reset();
 246                 Wire a = new Wire(t, 3, 1), b = new Wire(t, 3, 2), c = new Wire(t, 3, 1), d = new Wire(t, 3, 1);
 247                 new XorGate(t, 1, d.createReadWriteEnd(), a.createReadOnlyEnd(), b.createReadOnlyEnd(), c.createReadOnlyEnd());
 248                 a.createReadWriteEnd().feedSignals(Bit.ZERO, Bit.ONE, Bit.ONE);
 249                 b.createReadWriteEnd().feedSignals(Bit.ONE, Bit.ZERO, Bit.ONE);
 250                 c.createReadWriteEnd().feedSignals(Bit.ONE, Bit.ZERO, Bit.ONE);
 251
 252                 t.executeAll();
 253
 254                 assertBitArrayEquals(d.getValues(), Bit.ZERO, Bit.ONE, Bit.ONE);
 255         }
 256
 257         @Test
 258         void notTest()
 259         {
 260                 t.reset();
 261                 Wire a = new Wire(t, 3, 1), b = new Wire(t, 3, 2);
 262                 new NotGate(t, 1, a.createReadOnlyEnd(), b.createReadWriteEnd());
 263                 a.createReadWriteEnd().feedSignals(Bit.ZERO, Bit.ONE, Bit.ONE);
 264
 265                 t.executeAll();
 266
 267                 assertBitArrayEquals(b.getValues(), Bit.ONE, Bit.ZERO, Bit.ZERO);
 268         }
 269
 270         @Test
 271         void rsLatchCircuitTest()
 272         {
 273                 t.reset();
 274                 Wire r = new Wire(t, 1, 1), s = new Wire(t, 1, 1), t1 = new Wire(t, 1, 15), t2 = new Wire(t, 1, 1), q = new Wire(t, 1, 1),
 275                                 nq = new Wire(t, 1, 1);
 276
 277                 new OrGate(t, 1, t2.createReadWriteEnd(), r.createReadOnlyEnd(), nq.createReadOnlyEnd());
 278                 new OrGate(t, 1, t1.createReadWriteEnd(), s.createReadOnlyEnd(), q.createReadOnlyEnd());
 279                 new NotGate(t, 1, t2.createReadOnlyEnd(), q.createReadWriteEnd());
 280                 new NotGate(t, 1, t1.createReadOnlyEnd(), nq.createReadWriteEnd());
 281
 282                 ReadWriteEnd sIn = s.createReadWriteEnd(), rIn = r.createReadWriteEnd();
 283
 284                 sIn.feedSignals(Bit.ONE);
 285                 rIn.feedSignals(Bit.ZERO);
 286
 287                 t.executeAll();
 288
 289                 assertEquals(Bit.ONE, q.getValue());
 290                 assertEquals(Bit.ZERO, nq.getValue());
 291
 292                 sIn.feedSignals(Bit.ZERO);
 293
 294                 t.executeAll();
 295                 assertEquals(Bit.ONE, q.getValue());
 296                 assertEquals(Bit.ZERO, nq.getValue());
 297
 298                 rIn.feedSignals(Bit.ONE);
 299
 300                 t.executeAll();
 301
 302                 assertEquals(Bit.ZERO, q.getValue());
 303                 assertEquals(Bit.ONE, nq.getValue());
 304         }
 305
 306         @Test
 307         void numericValueTest()
 308         {
 309                 t.reset();
 310
 311                 Wire a = new Wire(t, 4, 1);
 312                 a.createReadWriteEnd().feedSignals(Bit.ONE, Bit.ONE, Bit.ONE, Bit.ONE);
 313
 314                 t.executeAll();
 315
 316                 assertEquals(15, a.getUnsignedValue());
 317                 assertEquals(-1, a.getSignedValue());
 318         }
 319
 320         boolean flag = false;
 321
 322         @Test
 323         void simpleTimelineTest()
 324         {
 325                 Timeline t = new Timeline(3);
 326                 flag = false;
 327                 t.addEvent((e) ->
 328                 {
 329                         if (!flag)
 330                                 fail("Events executed out of order!");
 331                         flag = false;
 332                 }, 15);
 333                 t.addEvent((e) ->
 334                 {
 335                         if (flag)
 336                                 fail("Events executed out of order!");
 337                         flag = true;
 338                 }, 10);
 339                 t.addEvent((e) ->
 340                 {
 341                         if (flag)
 342                                 fail("Events executed out of order!");
 343                         flag = true;
 344                 }, 20);
 345                 t.addEvent((e) ->
 346                 {
 347                         fail("Only supposed to execute until timestamp 20, not 25");
 348                 }, 25);
 349
 350                 t.executeUntil(t.laterThan(20), 100);
 351
 352                 if (!flag)
 353                         fail("Not all events were executed in order!");
 354         }
 355
 356         @Test
 357         void multipleInputs()
 358         {
 359                 t.reset();
 360                 Wire w = new Wire(t, 2, 1);
 361                 ReadWriteEnd wI1 = w.createReadWriteEnd(), wI2 = w.createReadWriteEnd();
 362                 wI1.feedSignals(Bit.ONE, Bit.Z);
 363                 wI2.feedSignals(Bit.Z, Bit.X);
 364                 t.executeAll();
 365                 assertBitArrayEquals(w.getValues(), Bit.ONE, Bit.X);
 366
 367                 wI2.feedSignals(Bit.ZERO, Bit.Z);
 368                 t.executeAll();
 369                 assertBitArrayEquals(w.getValues(), Bit.X, Bit.Z);
 370
 371                 wI2.feedSignals(Bit.Z, Bit.Z);
 372                 t.executeAll();
 373                 assertBitArrayEquals(w.getValues(), Bit.ONE, Bit.Z);
 374
 375                 wI2.feedSignals(Bit.ONE, Bit.Z);
 376                 ReadEnd rE = w.createReadOnlyEnd();
 377                 rE.registerObserver((i) -> fail("WireEnd notified observer, although value did not change."));
 378                 t.executeAll();
 379                 rE.close();
 380                 wI1.feedSignals(Bit.X, Bit.X);
 381                 t.executeAll();
 382                 wI1.registerObserver((i) -> fail("WireEnd notified observer, although it was closed."));
 383                 wI1.close();
 384                 assertBitArrayEquals(w.getValues(), Bit.ONE, Bit.Z);
 385         }
 386
 387         @Test
 388         void wireConnections()
 389         {
 390                 // Nur ein Experiment, was über mehrere 'passive' Bausteine hinweg passieren würde
 391
 392                 t.reset();
 393
 394                 Wire a = new Wire(t, 1, 2);
 395                 Wire b = new Wire(t, 1, 2);
 396                 Wire c = new Wire(t, 1, 2);
 397                 ReadWriteEnd aI = a.createReadWriteEnd();
 398                 ReadWriteEnd bI = b.createReadWriteEnd();
 399                 ReadWriteEnd cI = c.createReadWriteEnd();
 400
 401                 TestBitDisplay test = new TestBitDisplay(t, c.createReadOnlyEnd());
 402                 TestBitDisplay test2 = new TestBitDisplay(t, a.createReadOnlyEnd());
 403                 LongConsumer print = time -> System.out.format("Time %2d\n   a: %s\n   b: %s\n   c: %s\n", time, a, b, c);
 404
 405                 cI.feedSignals(Bit.ONE);
 406                 test.assertAfterSimulationIs(print, Bit.ONE);
 407
 408                 cI.feedSignals(Bit.X);
 409                 test.assertAfterSimulationIs(print, Bit.X);
 410
 411                 cI.feedSignals(Bit.X);
 412                 cI.feedSignals(Bit.Z);
 413                 test.assertAfterSimulationIs(print, Bit.Z);
 414
 415                 new Connector(t, b.createReadWriteEnd(), c.createReadWriteEnd()).connect();
 416                 test.assertAfterSimulationIs(print, Bit.Z);
 417                 System.err.println("ONE");
 418                 bI.feedSignals(Bit.ONE);
 419                 test.assertAfterSimulationIs(print, Bit.ONE);
 420                 System.err.println("ZERO");
 421                 bI.feedSignals(Bit.ZERO);
 422                 test.assertAfterSimulationIs(print, Bit.ZERO);
 423                 System.err.println("Z");
 424                 bI.feedSignals(Bit.Z);
 425                 test.assertAfterSimulationIs(print, Bit.Z);
 426
 427                 new Connector(t, a.createReadWriteEnd(), b.createReadWriteEnd()).connect();
 428                 System.err.println("Z 2");
 429                 aI.feedSignals(Bit.Z);
 430                 test.assertAfterSimulationIs(print, Bit.Z);
 431                 test2.assertAfterSimulationIs(Bit.Z);
 432                 System.err.println("ONE 2");
 433                 aI.feedSignals(Bit.ONE);
 434                 test.assertAfterSimulationIs(print, Bit.ONE);
 435                 test2.assertAfterSimulationIs(Bit.ONE);
 436                 System.err.println("ZERO 2");
 437                 aI.feedSignals(Bit.ZERO);
 438                 test.assertAfterSimulationIs(print, Bit.ZERO);
 439                 test2.assertAfterSimulationIs(Bit.ZERO);
 440                 System.err.println("Z 2 II");
 441                 aI.feedSignals(Bit.Z);
 442                 test.assertAfterSimulationIs(print, Bit.Z);
 443                 test2.assertAfterSimulationIs(Bit.Z);
 444
 445                 System.err.println("No Conflict yet");
 446                 bI.feedSignals(Bit.ONE);
 447                 test.assertAfterSimulationIs(print, Bit.ONE);
 448                 test2.assertAfterSimulationIs(Bit.ONE);
 449                 aI.feedSignals(Bit.ONE);
 450                 test.assertAfterSimulationIs(print, Bit.ONE);
 451                 test2.assertAfterSimulationIs(Bit.ONE);
 452                 System.err.println("Conflict");
 453                 aI.feedSignals(Bit.ZERO);
 454                 test.assertAfterSimulationIs(print, Bit.X);
 455                 test2.assertAfterSimulationIs(Bit.X);
 456                 aI.feedSignals(Bit.ONE);
 457                 test.assertAfterSimulationIs(print, Bit.ONE);
 458                 test2.assertAfterSimulationIs(Bit.ONE);
 459         }
 460
 461         private static void assertBitArrayEquals(BitVector actual, Bit... expected)
 462         {
 463                 assertArrayEquals(expected, actual.getBits());
 464         }
 465 }