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 fusionTest1()
  92         {
  93                 t.reset();
  94                 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);
  95                 Wire.fuse(a, out, 0, 0, a.length);
  96                 Wire.fuse(b, out, 0, a.length, b.length);
  97                 Wire.fuse(c, out, 0, a.length + b.length, c.length);
  98                 ReadWriteEnd rA = a.createReadWriteEnd();
  99                 rA.feedSignals(Bit.ZERO, Bit.ONE, Bit.ZERO);
 100                 ReadWriteEnd rB = b.createReadWriteEnd();
 101                 rB.feedSignals(Bit.ONE, Bit.ZERO);
 102                 ReadWriteEnd rC = c.createReadWriteEnd();
 103                 rC.feedSignals(Bit.ONE, Bit.ZERO, Bit.ONE);
 104                 t.executeAll();
 105                 assertBitArrayEquals(out.getValues(), Bit.ZERO, Bit.ONE, Bit.ZERO, Bit.ONE, Bit.ZERO, Bit.ONE, Bit.ZERO, Bit.ONE);
 106                 out.createReadWriteEnd().feedSignals(Bit.ONE, Bit.ZERO, Bit.ONE, Bit.ZERO, Bit.ONE, Bit.ZERO, Bit.ONE, Bit.ZERO);
 107                 t.executeAll();
 108                 assertBitArrayEquals(rA.getValues(), Bit.X, Bit.X, Bit.X);
 109                 assertBitArrayEquals(rB.getValues(), Bit.X, Bit.X);
 110                 assertBitArrayEquals(rC.getValues(), Bit.X, Bit.X, Bit.X);
 111                 rA.clearSignals();
 112                 rB.clearSignals();
 113                 rC.clearSignals();
 114                 t.executeAll();
 115                 assertBitArrayEquals(rA.getValues(), Bit.ONE, Bit.ZERO, Bit.ONE);
 116                 assertBitArrayEquals(rB.getValues(), Bit.ZERO, Bit.ONE);
 117                 assertBitArrayEquals(rC.getValues(), Bit.ZERO, Bit.ONE, Bit.ZERO);
 118         }
 119
 120         @Test
 121         void fusionTest2()
 122         {
 123                 t.reset();
 124                 Wire a = new Wire(t, 3, 1), b = new Wire(t, 3, 1);
 125                 Wire.fuse(a, b);
 126                 a.createReadWriteEnd().feedSignals(Bit.ONE, Bit.U, Bit.Z);
 127                 t.executeAll();
 128                 assertBitArrayEquals(b.getValues(), Bit.ONE, Bit.U, Bit.Z);
 129         }
 130
 131         @Test
 132         void triStateBufferTest()
 133         {
 134                 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);
 135                 new NotGate(t, 1, en.createReadOnlyEnd(), notEn.createReadWriteEnd());
 136                 new TriStateBuffer(t, 1, a.createReadOnlyEnd(), b.createReadWriteEnd(), en.createReadOnlyEnd());
 137                 new TriStateBuffer(t, 1, b.createReadOnlyEnd(), a.createReadWriteEnd(), notEn.createReadOnlyEnd());
 138
 139                 ReadWriteEnd enI = en.createReadWriteEnd(), aI = a.createReadWriteEnd(), bI = b.createReadWriteEnd();
 140                 enI.feedSignals(Bit.ONE);
 141                 aI.feedSignals(Bit.ONE);
 142                 bI.feedSignals(Bit.Z);
 143
 144                 t.executeAll();
 145
 146                 assertEquals(Bit.ONE, b.getValue());
 147
 148                 bI.feedSignals(Bit.ZERO);
 149
 150                 t.executeAll();
 151
 152                 assertEquals(Bit.X, b.getValue());
 153                 assertEquals(Bit.ONE, a.getValue());
 154
 155                 aI.clearSignals();
 156                 enI.feedSignals(Bit.ZERO);
 157
 158                 t.executeAll();
 159
 160                 assertEquals(Bit.ZERO, a.getValue());
 161
 162         }
 163
 164         @Test
 165         void muxTest()
 166         {
 167                 t.reset();
 168                 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);
 169                 ReadWriteEnd selectIn = select.createReadWriteEnd();
 170
 171                 selectIn.feedSignals(Bit.ZERO, Bit.ZERO);
 172                 a.createReadWriteEnd().feedSignals(Bit.ONE, Bit.ZERO, Bit.ONE, Bit.ZERO);
 173                 c.createReadWriteEnd().feedSignals(Bit.ZERO, Bit.ONE, Bit.ZERO, Bit.ONE);
 174
 175                 new Mux(t, 1, out.createReadWriteEnd(), select.createReadOnlyEnd(), a.createReadOnlyEnd(), b.createReadOnlyEnd(),
 176                                 c.createReadOnlyEnd());
 177                 t.executeAll();
 178
 179                 assertBitArrayEquals(out.getValues(), Bit.ONE, Bit.ZERO, Bit.ONE, Bit.ZERO);
 180                 selectIn.feedSignals(Bit.ZERO, Bit.ONE);
 181                 t.executeAll();
 182
 183                 assertBitArrayEquals(out.getValues(), Bit.ZERO, Bit.ONE, Bit.ZERO, Bit.ONE);
 184
 185                 selectIn.feedSignals(Bit.ONE, Bit.ONE);
 186                 t.executeAll();
 187
 188                 assertBitArrayEquals(out.getValues(), Bit.Z, Bit.Z, Bit.Z, Bit.Z);
 189
 190         }
 191
 192         @Test
 193         void demuxTest()
 194         {
 195                 t.reset();
 196                 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);
 197                 ReadWriteEnd selectIn = select.createReadWriteEnd();
 198
 199                 selectIn.feedSignals(Bit.ZERO, Bit.ZERO);
 200                 in.createReadWriteEnd().feedSignals(Bit.ONE, Bit.ZERO, Bit.ONE, Bit.ZERO);
 201
 202                 new Demux(t, 1, in.createReadOnlyEnd(), select.createReadOnlyEnd(), a.createReadWriteEnd(), b.createReadWriteEnd(),
 203                                 c.createReadWriteEnd());
 204                 t.executeAll();
 205
 206                 assertBitArrayEquals(a.getValues(), Bit.ONE, Bit.ZERO, Bit.ONE, Bit.ZERO);
 207                 assertBitArrayEquals(b.getValues(), Bit.U, Bit.U, Bit.U, Bit.U);
 208                 assertBitArrayEquals(c.getValues(), Bit.U, Bit.U, Bit.U, Bit.U);
 209                 selectIn.feedSignals(Bit.ZERO, Bit.ONE);
 210                 t.executeAll();
 211
 212                 assertBitArrayEquals(a.getValues(), Bit.Z, Bit.Z, Bit.Z, Bit.Z);
 213                 assertBitArrayEquals(b.getValues(), Bit.U, Bit.U, Bit.U, Bit.U);
 214                 assertBitArrayEquals(c.getValues(), Bit.ONE, Bit.ZERO, Bit.ONE, Bit.ZERO);
 215
 216                 selectIn.feedSignals(Bit.ONE, Bit.ONE);
 217                 t.executeAll();
 218
 219                 assertBitArrayEquals(a.getValues(), Bit.Z, Bit.Z, Bit.Z, Bit.Z);
 220                 assertBitArrayEquals(b.getValues(), Bit.U, Bit.U, Bit.U, Bit.U);
 221                 assertBitArrayEquals(c.getValues(), Bit.Z, Bit.Z, Bit.Z, Bit.Z);
 222
 223         }
 224
 225         @Test
 226         void andTest()
 227         {
 228                 t.reset();
 229                 Wire a = new Wire(t, 4, 1), b = new Wire(t, 4, 3), c = new Wire(t, 4, 1);
 230                 new AndGate(t, 1, c.createReadWriteEnd(), a.createReadOnlyEnd(), b.createReadOnlyEnd());
 231                 a.createReadWriteEnd().feedSignals(Bit.ONE, Bit.ONE, Bit.ZERO, Bit.ZERO);
 232                 b.createReadWriteEnd().feedSignals(Bit.ZERO, Bit.ONE, Bit.ZERO, Bit.ONE);
 233
 234                 t.executeAll();
 235
 236                 assertBitArrayEquals(c.getValues(), Bit.ZERO, Bit.ONE, Bit.ZERO, Bit.ZERO);
 237         }
 238
 239         @Test
 240         void orTest()
 241         {
 242                 t.reset();
 243                 Wire a = new Wire(t, 4, 1), b = new Wire(t, 4, 3), c = new Wire(t, 4, 1);
 244                 new OrGate(t, 1, c.createReadWriteEnd(), a.createReadOnlyEnd(), b.createReadOnlyEnd());
 245                 a.createReadWriteEnd().feedSignals(Bit.ONE, Bit.ONE, Bit.ZERO, Bit.ZERO);
 246                 b.createReadWriteEnd().feedSignals(Bit.ZERO, Bit.ONE, Bit.ZERO, Bit.ONE);
 247
 248                 t.executeAll();
 249
 250                 assertBitArrayEquals(c.getValues(), Bit.ONE, Bit.ONE, Bit.ZERO, Bit.ONE);
 251         }
 252
 253         @Test
 254         void nandTest()
 255         {
 256                 t.reset();
 257                 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);
 258                 new NandGate(t, 1, d.createReadWriteEnd(), a.createReadOnlyEnd(), b.createReadOnlyEnd(), c.createReadOnlyEnd());
 259                 a.createReadWriteEnd().feedSignals(Bit.ONE, Bit.ONE, Bit.ZERO, Bit.ZERO);
 260                 b.createReadWriteEnd().feedSignals(Bit.ZERO, Bit.ONE, Bit.ZERO, Bit.ONE);
 261                 c.createReadWriteEnd().feedSignals(Bit.ONE, Bit.ONE, Bit.ZERO, Bit.ZERO);
 262
 263                 t.executeAll();
 264
 265                 assertBitArrayEquals(d.getValues(), Bit.ONE, Bit.ZERO, Bit.ONE, Bit.ONE);
 266         }
 267
 268         @Test
 269         void norTest()
 270         {
 271                 t.reset();
 272                 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);
 273                 new NorGate(t, 1, d.createReadWriteEnd(), a.createReadOnlyEnd(), b.createReadOnlyEnd(), c.createReadOnlyEnd());
 274                 a.createReadWriteEnd().feedSignals(Bit.ONE, Bit.ONE, Bit.ZERO, Bit.ZERO);
 275                 b.createReadWriteEnd().feedSignals(Bit.ZERO, Bit.ONE, Bit.ZERO, Bit.ONE);
 276                 c.createReadWriteEnd().feedSignals(Bit.ONE, Bit.ONE, Bit.ZERO, Bit.ZERO);
 277
 278                 t.executeAll();
 279
 280                 assertBitArrayEquals(d.getValues(), Bit.ZERO, Bit.ZERO, Bit.ONE, Bit.ZERO);
 281         }
 282
 283         @Test
 284         void xorTest()
 285         {
 286                 t.reset();
 287                 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);
 288                 new XorGate(t, 1, d.createReadWriteEnd(), a.createReadOnlyEnd(), b.createReadOnlyEnd(), c.createReadOnlyEnd());
 289                 a.createReadWriteEnd().feedSignals(Bit.ZERO, Bit.ONE, Bit.ONE);
 290                 b.createReadWriteEnd().feedSignals(Bit.ONE, Bit.ZERO, Bit.ONE);
 291                 c.createReadWriteEnd().feedSignals(Bit.ONE, Bit.ZERO, Bit.ONE);
 292
 293                 t.executeAll();
 294
 295                 assertBitArrayEquals(d.getValues(), Bit.ZERO, Bit.ONE, Bit.ONE);
 296         }
 297
 298         @Test
 299         void notTest()
 300         {
 301                 t.reset();
 302                 Wire a = new Wire(t, 3, 1), b = new Wire(t, 3, 2);
 303                 new NotGate(t, 1, a.createReadOnlyEnd(), b.createReadWriteEnd());
 304                 a.createReadWriteEnd().feedSignals(Bit.ZERO, Bit.ONE, Bit.ONE);
 305
 306                 t.executeAll();
 307
 308                 assertBitArrayEquals(b.getValues(), Bit.ONE, Bit.ZERO, Bit.ZERO);
 309         }
 310
 311         @Test
 312         void rsLatchCircuitTest()
 313         {
 314                 t.reset();
 315                 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),
 316                                 nq = new Wire(t, 1, 1);
 317
 318                 new OrGate(t, 1, t2.createReadWriteEnd(), r.createReadOnlyEnd(), nq.createReadOnlyEnd());
 319                 new OrGate(t, 1, t1.createReadWriteEnd(), s.createReadOnlyEnd(), q.createReadOnlyEnd());
 320                 new NotGate(t, 1, t2.createReadOnlyEnd(), q.createReadWriteEnd());
 321                 new NotGate(t, 1, t1.createReadOnlyEnd(), nq.createReadWriteEnd());
 322
 323                 ReadWriteEnd sIn = s.createReadWriteEnd(), rIn = r.createReadWriteEnd();
 324
 325                 sIn.feedSignals(Bit.ONE);
 326                 rIn.feedSignals(Bit.ZERO);
 327
 328                 t.executeAll();
 329
 330                 assertEquals(Bit.ONE, q.getValue());
 331                 assertEquals(Bit.ZERO, nq.getValue());
 332
 333                 sIn.feedSignals(Bit.ZERO);
 334
 335                 t.executeAll();
 336                 assertEquals(Bit.ONE, q.getValue());
 337                 assertEquals(Bit.ZERO, nq.getValue());
 338
 339                 rIn.feedSignals(Bit.ONE);
 340
 341                 t.executeAll();
 342
 343                 assertEquals(Bit.ZERO, q.getValue());
 344                 assertEquals(Bit.ONE, nq.getValue());
 345         }
 346
 347         @Test
 348         void numericValueTest()
 349         {
 350                 t.reset();
 351
 352                 Wire a = new Wire(t, 4, 1);
 353                 a.createReadWriteEnd().feedSignals(Bit.ONE, Bit.ONE, Bit.ONE, Bit.ONE);
 354
 355                 t.executeAll();
 356
 357                 assertEquals(15, a.getUnsignedValue());
 358                 assertEquals(-1, a.getSignedValue());
 359         }
 360
 361         boolean flag = false;
 362
 363         @Test
 364         void simpleTimelineTest()
 365         {
 366                 Timeline t = new Timeline(3);
 367                 flag = false;
 368                 t.addEvent((e) ->
 369                 {
 370                         if (!flag)
 371                                 fail("Events executed out of order!");
 372                         flag = false;
 373                 }, 15);
 374                 t.addEvent((e) ->
 375                 {
 376                         if (flag)
 377                                 fail("Events executed out of order!");
 378                         flag = true;
 379                 }, 10);
 380                 t.addEvent((e) ->
 381                 {
 382                         if (flag)
 383                                 fail("Events executed out of order!");
 384                         flag = true;
 385                 }, 20);
 386                 t.addEvent((e) ->
 387                 {
 388                         fail("Only supposed to execute until timestamp 20, not 25");
 389                 }, 25);
 390
 391                 t.executeUntil(t.laterThan(20), 100);
 392
 393                 if (!flag)
 394                         fail("Not all events were executed in order!");
 395         }
 396
 397         @Test
 398         void multipleInputs()
 399         {
 400                 t.reset();
 401                 Wire w = new Wire(t, 2, 1);
 402                 ReadWriteEnd wI1 = w.createReadWriteEnd(), wI2 = w.createReadWriteEnd();
 403                 wI1.feedSignals(Bit.ONE, Bit.Z);
 404                 wI2.feedSignals(Bit.Z, Bit.X);
 405                 t.executeAll();
 406                 assertBitArrayEquals(w.getValues(), Bit.ONE, Bit.X);
 407
 408                 wI2.feedSignals(Bit.ZERO, Bit.Z);
 409                 t.executeAll();
 410                 assertBitArrayEquals(w.getValues(), Bit.X, Bit.Z);
 411
 412                 wI2.feedSignals(Bit.Z, Bit.Z);
 413                 t.executeAll();
 414                 assertBitArrayEquals(w.getValues(), Bit.ONE, Bit.Z);
 415
 416                 wI2.feedSignals(Bit.ONE, Bit.Z);
 417                 ReadEnd rE = w.createReadOnlyEnd();
 418                 rE.registerObserver((i) -> fail("WireEnd notified observer, although value did not change."));
 419                 t.executeAll();
 420                 rE.close();
 421                 wI1.feedSignals(Bit.X, Bit.X);
 422                 t.executeAll();
 423                 wI1.registerObserver((i) -> fail("WireEnd notified observer, although it was closed."));
 424                 wI1.close();
 425                 assertBitArrayEquals(w.getValues(), Bit.ONE, Bit.Z);
 426         }
 427
 428         @Test
 429         void wireConnections()
 430         {
 431                 // Nur ein Experiment, was über mehrere 'passive' Bausteine hinweg passieren würde
 432
 433                 t.reset();
 434
 435                 Wire a = new Wire(t, 1, 2);
 436                 Wire b = new Wire(t, 1, 2);
 437                 Wire c = new Wire(t, 1, 2);
 438                 ReadWriteEnd aI = a.createReadWriteEnd();
 439                 ReadWriteEnd bI = b.createReadWriteEnd();
 440                 ReadWriteEnd cI = c.createReadWriteEnd();
 441
 442                 TestBitDisplay test = new TestBitDisplay(t, c.createReadOnlyEnd());
 443                 TestBitDisplay test2 = new TestBitDisplay(t, a.createReadOnlyEnd());
 444                 LongConsumer print = time -> System.out.format("Time %2d\n a: %s\n b: %s\n c: %s\n", time, a, b, c);
 445
 446                 cI.feedSignals(Bit.ONE);
 447                 test.assertAfterSimulationIs(print, Bit.ONE);
 448
 449                 cI.feedSignals(Bit.X);
 450                 test.assertAfterSimulationIs(print, Bit.X);
 451
 452                 cI.feedSignals(Bit.X);
 453                 cI.feedSignals(Bit.Z);
 454                 test.assertAfterSimulationIs(print, Bit.Z);
 455
 456                 new Connector(t, b.createReadWriteEnd(), c.createReadWriteEnd()).connect();
 457                 test.assertAfterSimulationIs(print, Bit.Z);
 458                 System.err.println("ONE");
 459                 bI.feedSignals(Bit.ONE);
 460                 test.assertAfterSimulationIs(print, Bit.ONE);
 461                 System.err.println("ZERO");
 462                 bI.feedSignals(Bit.ZERO);
 463                 test.assertAfterSimulationIs(print, Bit.ZERO);
 464                 System.err.println("Z");
 465                 bI.feedSignals(Bit.Z);
 466                 test.assertAfterSimulationIs(print, Bit.Z);
 467
 468                 new Connector(t, a.createReadWriteEnd(), b.createReadWriteEnd()).connect();
 469                 System.err.println("Z 2");
 470                 aI.feedSignals(Bit.Z);
 471                 test.assertAfterSimulationIs(print, Bit.Z);
 472                 test2.assertAfterSimulationIs(Bit.Z);
 473                 System.err.println("ONE 2");
 474                 aI.feedSignals(Bit.ONE);
 475                 test.assertAfterSimulationIs(print, Bit.ONE);
 476                 test2.assertAfterSimulationIs(Bit.ONE);
 477                 System.err.println("ZERO 2");
 478                 aI.feedSignals(Bit.ZERO);
 479                 test.assertAfterSimulationIs(print, Bit.ZERO);
 480                 test2.assertAfterSimulationIs(Bit.ZERO);
 481                 System.err.println("Z 2 II");
 482                 aI.feedSignals(Bit.Z);
 483                 test.assertAfterSimulationIs(print, Bit.Z);
 484                 test2.assertAfterSimulationIs(Bit.Z);
 485
 486                 System.err.println("No Conflict yet");
 487                 bI.feedSignals(Bit.ONE);
 488                 test.assertAfterSimulationIs(print, Bit.ONE);
 489                 test2.assertAfterSimulationIs(Bit.ONE);
 490                 aI.feedSignals(Bit.ONE);
 491                 test.assertAfterSimulationIs(print, Bit.ONE);
 492                 test2.assertAfterSimulationIs(Bit.ONE);
 493                 System.err.println("Conflict");
 494                 aI.feedSignals(Bit.ZERO);
 495                 test.assertAfterSimulationIs(print, Bit.X);
 496                 test2.assertAfterSimulationIs(Bit.X);
 497                 aI.feedSignals(Bit.ONE);
 498                 test.assertAfterSimulationIs(print, Bit.ONE);
 499                 test2.assertAfterSimulationIs(Bit.ONE);
 500         }
 501
 502         private static void assertBitArrayEquals(BitVector actual, Bit... expected)
 503         {
 504                 assertArrayEquals(expected, actual.getBits());
 505         }
 506 }