era.mi/src/era/mi/logic/tests/ComponentTest.java

   1 package era.mi.logic.tests;
   2
   3 import static org.junit.jupiter.api.Assertions.*;
   4
   5 import java.util.Arrays;
   6 import java.util.function.LongConsumer;
   7
   8 import org.junit.jupiter.api.Test;
   9
  10 import era.mi.logic.Bit;
  11 import era.mi.logic.Simulation;
  12 import era.mi.logic.components.Merger;
  13 import era.mi.logic.components.Mux;
  14 import era.mi.logic.components.Splitter;
  15 import era.mi.logic.components.TriStateBuffer;
  16 import era.mi.logic.components.gates.AndGate;
  17 import era.mi.logic.components.gates.NotGate;
  18 import era.mi.logic.components.gates.OrGate;
  19 import era.mi.logic.wires.WireArray;
  20 import era.mi.logic.wires.WireArray.WireArrayInput;
  21
  22 class ComponentTest
  23 {
  24
  25         @Test
  26         void circuitExampleTest()
  27         {
  28                 Simulation.TIMELINE.reset();
  29                 WireArray a = new WireArray(1, 1), b = new WireArray(1, 1), c = new WireArray(1, 10), d = new WireArray(2, 1), e = new WireArray(1, 1),
  30                                 f = new WireArray(1, 1), g = new WireArray(1, 1), h = new WireArray(2, 1), i = new WireArray(2, 1), j = new WireArray(1, 1), k = new WireArray(1, 1);
  31                 new AndGate(1, a, b, f);
  32                 new NotGate(1, f, g);
  33                 new Merger(h, c, g);
  34                 new Mux(1, i, e, h, d);
  35                 new Splitter(i, k, j);
  36
  37                 a.createInput().feedSignals(Bit.ZERO);
  38                 b.createInput().feedSignals(Bit.ONE);
  39                 c.createInput().feedSignals(Bit.ZERO);
  40                 d.createInput().feedSignals(Bit.ONE, Bit.ONE);
  41                 e.createInput().feedSignals(Bit.ZERO);
  42
  43                 Simulation.TIMELINE.executeAll();
  44
  45                 assertEquals(Bit.ONE, j.getValue());
  46                 assertEquals(Bit.ZERO, k.getValue());
  47         }
  48
  49     @Test
  50     void splitterTest()
  51     {
  52         Simulation.TIMELINE.reset();
  53         WireArray a = new WireArray(3, 1), b = new WireArray(2, 1), c = new WireArray(3, 1), in = new WireArray(8, 1);
  54         in.createInput().feedSignals(Bit.ZERO, Bit.ONE, Bit.ZERO, Bit.ONE, Bit.ZERO, Bit.ONE, Bit.ZERO, Bit.ONE);
  55         new Splitter(in, a, b, c);
  56
  57         Simulation.TIMELINE.executeAll();
  58
  59         assertArrayEquals(new Bit[] { Bit.ZERO, Bit.ONE, Bit.ZERO }, a.getValues());
  60         assertArrayEquals(new Bit[] { Bit.ONE, Bit.ZERO }, b.getValues());
  61         assertArrayEquals(new Bit[] { Bit.ONE, Bit.ZERO, Bit.ONE }, c.getValues());
  62     }
  63
  64     @Test
  65     void mergerTest()
  66     {
  67         Simulation.TIMELINE.reset();
  68         WireArray a = new WireArray(3, 1), b = new WireArray(2, 1), c = new WireArray(3, 1), out = new WireArray(8, 1);
  69         a.createInput().feedSignals(Bit.ZERO, Bit.ONE, Bit.ZERO);
  70         b.createInput().feedSignals(Bit.ONE, Bit.ZERO);
  71         c.createInput().feedSignals(Bit.ONE, Bit.ZERO, Bit.ONE);
  72
  73         new Merger(out, a, b, c);
  74
  75         Simulation.TIMELINE.executeAll();
  76
  77         assertTrue(Arrays.equals(out.getValues(),
  78                 new Bit[] { Bit.ZERO, Bit.ONE, Bit.ZERO, Bit.ONE, Bit.ZERO, Bit.ONE, Bit.ZERO, Bit.ONE }));
  79     }
  80
  81     @Test
  82     void triStateBufferTest()
  83     {
  84         WireArray a = new WireArray(1, 1), b = new WireArray(1, 1), en = new WireArray(1, 1),
  85                 notEn = new WireArray(1, 1);
  86         new NotGate(1, en, notEn);
  87         new TriStateBuffer(1, a, b, en);
  88         new TriStateBuffer(1, b, a, notEn);
  89
  90         WireArrayInput enI = en.createInput(), aI = a.createInput(), bI = b.createInput();
  91         enI.feedSignals(Bit.ONE);
  92         aI.feedSignals(Bit.ONE);
  93
  94         Simulation.TIMELINE.executeAll();
  95
  96         assertEquals(Bit.ONE, b.getValue());
  97
  98         bI.feedSignals(Bit.ZERO);
  99
 100         Simulation.TIMELINE.executeAll();
 101
 102         assertEquals(Bit.X, b.getValue());
 103         assertEquals(Bit.ONE, a.getValue());
 104
 105         aI.clearSignals();
 106         enI.feedSignals(Bit.ZERO);
 107
 108         Simulation.TIMELINE.executeAll();
 109
 110         assertEquals(Bit.ZERO, a.getValue());
 111
 112     }
 113
 114     @Test
 115     void muxTest()
 116     {
 117         Simulation.TIMELINE.reset();
 118         WireArray a = new WireArray(4, 3), b = new WireArray(4, 6), c = new WireArray(4, 4),
 119                 select = new WireArray(2, 5), out = new WireArray(4, 1);
 120         WireArrayInput selectIn = select.createInput();
 121
 122         selectIn.feedSignals(Bit.ZERO, Bit.ZERO);
 123         a.createInput().feedSignals(Bit.ONE, Bit.ZERO, Bit.ONE, Bit.ZERO);
 124         c.createInput().feedSignals(Bit.ZERO, Bit.ONE, Bit.ZERO, Bit.ONE);
 125
 126         new Mux(1, out, select, a, b, c);
 127         Simulation.TIMELINE.executeAll();
 128
 129         assertArrayEquals(new Bit[] { Bit.ONE, Bit.ZERO, Bit.ONE, Bit.ZERO }, out.getValues());
 130         selectIn.feedSignals(Bit.ZERO, Bit.ONE);
 131         Simulation.TIMELINE.executeAll();
 132
 133         assertArrayEquals(new Bit[] { Bit.ZERO, Bit.ONE, Bit.ZERO, Bit.ONE }, out.getValues());
 134
 135         selectIn.feedSignals(Bit.ONE, Bit.ONE);
 136         Simulation.TIMELINE.executeAll();
 137
 138         assertArrayEquals(new Bit[] { Bit.Z, Bit.Z, Bit.Z, Bit.Z }, out.getValues());
 139
 140     }
 141
 142     @Test
 143     void andTest()
 144     {
 145         Simulation.TIMELINE.reset();
 146         AndGate gate = new AndGate(1, new WireArray(4, 1), new WireArray(4, 1), new WireArray(4, 1));
 147         gate.getA().createInput().feedSignals(Bit.ONE, Bit.ONE, Bit.ZERO, Bit.ZERO);
 148         gate.getB().createInput().feedSignals(Bit.ZERO, Bit.ONE, Bit.ZERO, Bit.ONE);
 149
 150         Simulation.TIMELINE.executeAll();
 151         assertArrayEquals(new Bit[] { Bit.ZERO, Bit.ONE, Bit.ZERO, Bit.ZERO }, gate.getOut().getValues());
 152     }
 153
 154     @Test
 155     void orTest()
 156     {
 157         Simulation.TIMELINE.reset();
 158         OrGate gate = new OrGate(1, new WireArray(4, 1), new WireArray(4, 1), new WireArray(4, 1));
 159         gate.getA().createInput().feedSignals(Bit.ONE, Bit.ONE, Bit.ZERO, Bit.ZERO);
 160         gate.getB().createInput().feedSignals(Bit.ZERO, Bit.ONE, Bit.ZERO, Bit.ONE);
 161
 162         Simulation.TIMELINE.executeAll();
 163
 164         assertArrayEquals(new Bit[] { Bit.ONE, Bit.ONE, Bit.ZERO, Bit.ONE }, gate.getOut().getValues());
 165     }
 166
 167     @Test
 168     void rsLatchCircuitTest()
 169     {
 170         Simulation.TIMELINE.reset();
 171         WireArray r = new WireArray(1, 1), s = new WireArray(1, 1), t1 = new WireArray(1, 15), t2 = new WireArray(1, 1),
 172                 q = new WireArray(1, 1), nq = new WireArray(1, 1);
 173
 174         new OrGate(1, r, nq, t2);
 175         new OrGate(1, s, q, t1);
 176         new NotGate(1, t2, q);
 177         new NotGate(1, t1, nq);
 178
 179         WireArrayInput sIn = s.createInput(), rIn = r.createInput();
 180
 181         sIn.feedSignals(Bit.ONE);
 182         rIn.feedSignals(Bit.ZERO);
 183
 184         Simulation.TIMELINE.executeAll();
 185
 186         assertEquals(Bit.ONE, q.getValue());
 187         assertEquals(Bit.ZERO, nq.getValue());
 188
 189         sIn.feedSignals(Bit.ZERO);
 190
 191         Simulation.TIMELINE.executeAll();
 192         assertEquals(Bit.ONE, q.getValue());
 193         assertEquals(Bit.ZERO, nq.getValue());
 194
 195         rIn.feedSignals(Bit.ONE);
 196
 197         Simulation.TIMELINE.executeAll();
 198
 199         assertEquals(Bit.ZERO, q.getValue());
 200         assertEquals(Bit.ONE, nq.getValue());
 201     }
 202
 203     @Test
 204     void numericValueTest()
 205     {
 206         Simulation.TIMELINE.reset();
 207
 208         WireArray a = new WireArray(4, 1);
 209         a.createInput().feedSignals(Bit.ONE, Bit.ONE, Bit.ONE, Bit.ONE);
 210
 211         Simulation.TIMELINE.executeAll();
 212
 213         assertEquals(15, a.getUnsignedValue());
 214         assertEquals(-1, a.getSignedValue());
 215     }
 216
 217     @Test
 218     void multipleInputs()
 219     {
 220         Simulation.TIMELINE.reset();
 221         WireArray w = new WireArray(2, 1);
 222         WireArrayInput wI1 = w.createInput(), wI2 = w.createInput();
 223         wI1.feedSignals(Bit.ONE, Bit.Z);
 224         wI2.feedSignals(Bit.Z, Bit.X);
 225         Simulation.TIMELINE.executeAll();
 226         assertArrayEquals(new Bit[] { Bit.ONE, Bit.X }, w.getValues());
 227
 228         wI2.feedSignals(Bit.ZERO, Bit.Z);
 229         Simulation.TIMELINE.executeAll();
 230         assertArrayEquals(new Bit[] { Bit.X, Bit.Z }, w.getValues());
 231
 232         wI2.feedSignals(Bit.Z, Bit.Z);
 233         Simulation.TIMELINE.executeAll();
 234         assertArrayEquals(new Bit[] { Bit.ONE, Bit.Z }, w.getValues());
 235
 236         wI2.feedSignals(Bit.ONE, Bit.Z);
 237         w.addObserver((i) -> fail("WireArray notified observer, although value did not change."));
 238         Simulation.TIMELINE.executeAll();
 239         assertArrayEquals(new Bit[] { Bit.ONE, Bit.Z }, w.getValues());
 240     }
 241
 242         @Test
 243         void wireConnections()
 244         {
 245                 // Nur ein Experiment, was über mehrere 'passive' Bausteine hinweg passieren würde
 246
 247                 Simulation.TIMELINE.reset();
 248
 249                 WireArray a = new WireArray(1, 2);
 250                 WireArray b = new WireArray(1, 2);
 251                 WireArray c = new WireArray(1, 2);
 252                 WireArrayInput aI = a.createInput();
 253                 WireArrayInput bI = b.createInput();
 254                 WireArrayInput cI = c.createInput();
 255
 256                 TestBitDisplay test = new TestBitDisplay(c);
 257                 TestBitDisplay test2 = new TestBitDisplay(a);
 258                 LongConsumer print = time -> System.out.format("Time %2d\n   a: %s\n   b: %s\n   c: %s\n", time, a, b, c);
 259
 260                 cI.feedSignals(Bit.ONE);
 261                 test.assertAfterSimulationIs(print, Bit.ONE);
 262
 263                 cI.feedSignals(Bit.X);
 264                 test.assertAfterSimulationIs(print, Bit.X);
 265
 266                 cI.feedSignals(Bit.X);
 267                 cI.feedSignals(Bit.Z);
 268                 test.assertAfterSimulationIs(print, Bit.Z);
 269
 270                 Connector c1 = new Connector(b, c);
 271                 test.assertAfterSimulationIs(print, Bit.Z);
 272                 System.err.println("ONE");
 273                 bI.feedSignals(Bit.ONE);
 274                 test.assertAfterSimulationIs(print, Bit.ONE);
 275                 System.err.println("ZERO");
 276                 bI.feedSignals(Bit.ZERO);
 277                 test.assertAfterSimulationIs(print, Bit.ZERO);
 278                 System.err.println("Z");
 279                 bI.feedSignals(Bit.Z);
 280                 test.assertAfterSimulationIs(print, Bit.Z);
 281
 282                 Connector c2 = new Connector(a, b);
 283                 System.err.println("Z 2");
 284                 aI.feedSignals(Bit.Z);
 285                 test.assertAfterSimulationIs(print, Bit.Z);
 286                 test2.assertAfterSimulationIs(Bit.Z);
 287                 System.err.println("ONE 2");
 288                 aI.feedSignals(Bit.ONE);
 289                 test.assertAfterSimulationIs(print, Bit.ONE);
 290                 test2.assertAfterSimulationIs(Bit.ONE);
 291                 System.err.println("ZERO 2");
 292                 aI.feedSignals(Bit.ZERO);
 293                 test.assertAfterSimulationIs(print, Bit.ZERO);
 294                 test2.assertAfterSimulationIs(Bit.ZERO);
 295                 System.err.println("Z 2 II");
 296                 aI.feedSignals(Bit.Z);
 297                 test.assertAfterSimulationIs(print, Bit.Z);
 298                 test2.assertAfterSimulationIs(Bit.Z);
 299
 300                 System.err.println("No Conflict yet");
 301                 bI.feedSignals(Bit.ONE);
 302                 test.assertAfterSimulationIs(print, Bit.ONE);
 303                 test2.assertAfterSimulationIs(Bit.ONE);
 304                 aI.feedSignals(Bit.ONE);
 305                 test.assertAfterSimulationIs(print, Bit.ONE);
 306                 test2.assertAfterSimulationIs(Bit.ONE);
 307                 System.err.println("Conflict");
 308                 aI.feedSignals(Bit.ZERO);
 309                 test.assertAfterSimulationIs(print, Bit.X);
 310                 test2.assertAfterSimulationIs(Bit.X);
 311                 aI.feedSignals(Bit.ONE);
 312                 test.assertAfterSimulationIs(print, Bit.ONE);
 313                 test2.assertAfterSimulationIs(Bit.ONE);
 314         }
 315
 316     private static void assertBitArrayEquals(Bit[] actual, Bit... expected)
 317     {
 318         assertArrayEquals(expected, actual);
 319     }
 320 }