X-Git-Url: https://mograsim.net/gitweb/?a=blobdiff_plain;f=era.mi%2Fsrc%2Fera%2Fmi%2Flogic%2Ftests%2FComponentTest.java;h=a18228bb3f5a8de4eff3124b34d2bc0c320062fd;hb=49f569b513c36e8ad421fd5a547bf34bd830652a;hp=722c52a2a466044bccb16b2a3a92567aa07ff430;hpb=d31f9734d6aa233682ef80d7e9322dd500123bfd;p=Mograsim.git

diff --git a/era.mi/src/era/mi/logic/tests/ComponentTest.java b/era.mi/src/era/mi/logic/tests/ComponentTest.java
index 722c52a2..a18228bb 100644
--- a/era.mi/src/era/mi/logic/tests/ComponentTest.java
+++ b/era.mi/src/era/mi/logic/tests/ComponentTest.java
@@ -3,13 +3,15 @@ package era.mi.logic.tests;
 import static org.junit.jupiter.api.Assertions.*;
 
 import java.util.Arrays;
-import java.util.function.LongConsumer;
 
 import org.junit.jupiter.api.Test;
 
 import era.mi.logic.Bit;
 import era.mi.logic.Simulation;
-import era.mi.logic.components.Mux2;
+import era.mi.logic.components.Merger;
+import era.mi.logic.components.Mux;
+import era.mi.logic.components.Splitter;
+import era.mi.logic.components.TriStateBuffer;
 import era.mi.logic.components.gates.AndGate;
 import era.mi.logic.components.gates.NotGate;
 import era.mi.logic.components.gates.OrGate;
@@ -19,273 +21,323 @@ import era.mi.logic.wires.WireArray.WireArrayInput;
 class ComponentTest
 {
 
-//	@Test
-//	void circuitExampleTest()
-//	{
-//		Simulation.TIMELINE.reset();
-//		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),
-//				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);
-//		new AndGate(1, a, b, f);
-//		new NotGate(1, f, g);
-//		new Merger2(h, c, g);
-//		new Mux(1, h, d, e, i);
-//		new Splitter(i, k, j);
-//		
-//		a.createInput().feedSignals(Bit.ZERO);
-//		b.createInput().feedSignals(Bit.ONE);
-//		c.createInput().feedSignals(Bit.ZERO);
-//		d.createInput().feedSignals(Bit.ONE, Bit.ONE);
-//		e.createInput().feedSignals(Bit.ONE);
-//		
-//		while(Simulation.TIMELINE.hasNext())
-//		{
-//			Simulation.TIMELINE.executeNext();
-//		}
-//		
-//		assertEquals(Simulation.TIMELINE.getSimulationTime(), 14);
-//		assertEquals(Bit.ONE, j.getValue());
-//		assertEquals(Bit.ZERO, k.getValue());
-//	}
-//
-//	@Test
-//	void splitterTest()
-//	{
-//		Simulation.TIMELINE.reset();
-//		WireArray a = new WireArray(3, 1), b = new WireArray(2, 1), c = new WireArray(3, 1), in = new WireArray(8, 1);
-//		in.createInput().feedSignals(Bit.ZERO, Bit.ONE, Bit.ZERO, Bit.ONE, Bit.ZERO,Bit.ONE, Bit.ZERO, Bit.ONE);
-//		new Splitter(in, a, b, c);
-//		
-//		while(Simulation.TIMELINE.hasNext())
-//		{
-//			Simulation.TIMELINE.executeNext();
-//		}
-//		
-//		assertTrue(Arrays.equals(a.getValues(), new Bit[] { Bit.ZERO, Bit.ONE, Bit.ZERO }));
-//		assertTrue(Arrays.equals(b.getValues(), new Bit[] { Bit.ONE, Bit.ZERO }));
-//		assertTrue(Arrays.equals(c.getValues(), new Bit[] { Bit.ONE, Bit.ZERO, Bit.ONE }));
-//	}
-//	
-//	@Test
-//	void mergerTest()
-//	{
-//		Simulation.TIMELINE.reset();
-//		WireArray a = new WireArray(3, 1), b = new WireArray(2, 1), c = new WireArray(3, 1), out = new WireArray(8, 1);
-//		a.createInput().feedSignals(Bit.ZERO, Bit.ONE, Bit.ZERO);
-//		b.createInput().feedSignals(Bit.ONE, Bit.ZERO);
-//		c.createInput().feedSignals(Bit.ONE, Bit.ZERO, Bit.ONE);
-//		
-//		new Merger2(out, a, b, c);
-//		
-//		while(Simulation.TIMELINE.hasNext())
-//		{
-//			Simulation.TIMELINE.executeNext();
-//		}
-//		
-//		assertTrue(Arrays.equals(out.getValues(), new Bit[] { Bit.ZERO, Bit.ONE, Bit.ZERO, Bit.ONE, Bit.ZERO, Bit.ONE, Bit.ZERO, Bit.ONE }));
-//	}
-	
 	@Test
-	void muxTest()
+	void circuitExampleTest()
 	{
 		Simulation.TIMELINE.reset();
-		WireArray a = new WireArray(1, 3), b = new WireArray(1, 2), select = new WireArray(1, 1), out = new WireArray(1, 1);
-		WireArrayInput selectIn = select.createInput();
+		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),
+				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);
+		new AndGate(1, a, b, f);
+		new NotGate(1, f, g);
+		new Merger(h, c, g);
+		new Mux(1, i, e, h, d);
+		new Splitter(i, k, j);
 		
-		selectIn.feedSignals(Bit.ZERO);
-		a.createInput().feedSignals(Bit.ONE);
-		b.createInput().feedSignals(Bit.ZERO);
+		a.createInput().feedSignals(Bit.ZERO);
+		b.createInput().feedSignals(Bit.ONE);
+		c.createInput().feedSignals(Bit.ZERO);
+		d.createInput().feedSignals(Bit.ONE, Bit.ONE);
+		e.createInput().feedSignals(Bit.ZERO);
 		
-		new Mux2(1, out, select, a, b);
-		assertEquals(Bit.Z, out.getValue());
-		while(Simulation.TIMELINE.hasNext())
-		{
-			Simulation.TIMELINE.executeNext();
-		}
-
-		assertEquals(Bit.ONE, out.getValue());
-		selectIn.feedSignals(Bit.ONE);
 		while(Simulation.TIMELINE.hasNext())
 		{
 			Simulation.TIMELINE.executeNext();
 		}
 		
-		assertEquals(out.getValue(), Bit.ZERO);
+		assertEquals(Bit.ONE, j.getValue());
+		assertEquals(Bit.ZERO, k.getValue());
 	}
 
-	@Test
-	void andTest()
+    @Test
+    void splitterTest()
+    {
+	Simulation.TIMELINE.reset();
+	WireArray a = new WireArray(3, 1), b = new WireArray(2, 1), c = new WireArray(3, 1), in = new WireArray(8, 1);
+	in.createInput().feedSignals(Bit.ZERO, Bit.ONE, Bit.ZERO, Bit.ONE, Bit.ZERO, Bit.ONE, Bit.ZERO, Bit.ONE);
+	new Splitter(in, a, b, c);
+
+	while (Simulation.TIMELINE.hasNext())
 	{
-		Simulation.TIMELINE.reset();
-		AndGate gate = new AndGate(1, new WireArray(4, 1), new WireArray(4, 1), new WireArray(4, 1));
-		gate.getA().createInput().feedSignals(Bit.ONE, Bit.ONE, Bit.ZERO, Bit.ZERO);
-		gate.getB().createInput().feedSignals(Bit.ZERO, Bit.ONE, Bit.ZERO, Bit.ONE);
-		
-		
-		while(Simulation.TIMELINE.hasNext())
-		{
-			Simulation.TIMELINE.executeNext();
-		}
-		assertTrue(Arrays.equals(gate.getOut().getValues(), new Bit[] { Bit.ZERO, Bit.ONE, Bit.ZERO, Bit.ZERO }));
+	    Simulation.TIMELINE.executeNext();
 	}
-	
-	@Test
-	void orTest()
+
+	assertTrue(Arrays.equals(a.getValues(), new Bit[] { Bit.ZERO, Bit.ONE, Bit.ZERO }));
+	assertTrue(Arrays.equals(b.getValues(), new Bit[] { Bit.ONE, Bit.ZERO }));
+	assertTrue(Arrays.equals(c.getValues(), new Bit[] { Bit.ONE, Bit.ZERO, Bit.ONE }));
+    }
+
+    @Test
+    void mergerTest()
+    {
+	Simulation.TIMELINE.reset();
+	WireArray a = new WireArray(3, 1), b = new WireArray(2, 1), c = new WireArray(3, 1), out = new WireArray(8, 1);
+	a.createInput().feedSignals(Bit.ZERO, Bit.ONE, Bit.ZERO);
+	b.createInput().feedSignals(Bit.ONE, Bit.ZERO);
+	c.createInput().feedSignals(Bit.ONE, Bit.ZERO, Bit.ONE);
+
+	new Merger(out, a, b, c);
+
+	while (Simulation.TIMELINE.hasNext())
 	{
-		Simulation.TIMELINE.reset();
-		OrGate gate = new OrGate(1, new WireArray(4, 1), new WireArray(4, 1), new WireArray(4, 1));
-		gate.getA().createInput().feedSignals(Bit.ONE, Bit.ONE, Bit.ZERO, Bit.ZERO);
-		gate.getB().createInput().feedSignals(Bit.ZERO, Bit.ONE, Bit.ZERO, Bit.ONE);
-		
-		while(Simulation.TIMELINE.hasNext())
-		{
-			Simulation.TIMELINE.executeNext();
-		}
-		
-		assertTrue(Arrays.equals(gate.getOut().getValues(), new Bit[] { Bit.ONE, Bit.ONE, Bit.ZERO, Bit.ONE }));
+	    Simulation.TIMELINE.executeNext();
 	}
-	
-	@Test
-	void rsLatchCircuitTest()
+
+	assertTrue(Arrays.equals(out.getValues(),
+		new Bit[] { Bit.ZERO, Bit.ONE, Bit.ZERO, Bit.ONE, Bit.ZERO, Bit.ONE, Bit.ZERO, Bit.ONE }));
+    }
+
+    @Test
+    void triStateBufferTest()
+    {
+	WireArray a = new WireArray(1, 1), b = new WireArray(1, 1), en = new WireArray(1, 1),
+		notEn = new WireArray(1, 1);
+	new NotGate(1, en, notEn);
+	new TriStateBuffer(1, a, b, en);
+	new TriStateBuffer(1, b, a, notEn);
+
+	WireArrayInput enI = en.createInput(), aI = a.createInput(), bI = b.createInput();
+	enI.feedSignals(Bit.ONE);
+	aI.feedSignals(Bit.ONE);
+
+	while (Simulation.TIMELINE.hasNext())
 	{
-		Simulation.TIMELINE.reset();
-		WireArray r = new WireArray(1, 1), s = new WireArray(1, 1), t1 = new WireArray(1, 15), t2 = new WireArray(1, 1), q = new WireArray(1, 1),
-				nq = new WireArray(1, 1);
-		
-		new OrGate(1, r, nq, t2);
-		new OrGate(1, s, q, t1);
-		new NotGate(1, t2, q);
-		new NotGate(1, t1, nq);
-	
-		WireArrayInput sIn = s.createInput(), rIn = r.createInput();
-		
-		sIn.feedSignals(Bit.ONE);
-		rIn.feedSignals(Bit.ZERO);
-		
-		while(Simulation.TIMELINE.hasNext())
-		{
-			Simulation.TIMELINE.executeNext();
-		}
-		
-		assertEquals(q.getValue(), Bit.ONE);
-		assertEquals(nq.getValue(), Bit.ZERO);
-		
-		sIn.feedSignals(Bit.ZERO);
-		
-		while(Simulation.TIMELINE.hasNext())
-		{
-			Simulation.TIMELINE.executeNext();
-		}
-		
-		assertEquals(q.getValue(), Bit.ONE);
-		assertEquals(nq.getValue(), Bit.ZERO);
-		
-		rIn.feedSignals(Bit.ONE);
-		
-		while(Simulation.TIMELINE.hasNext())
-		{
-			Simulation.TIMELINE.executeNext();
-		}
-		
-		assertEquals(q.getValue(), Bit.ZERO);
-		assertEquals(nq.getValue(), Bit.ONE);
+	    Simulation.TIMELINE.executeNext();
 	}
-	
-	@Test
-	void numericValueTest()
+
+	assertEquals(Bit.ONE, b.getValue());
+
+	bI.feedSignals(Bit.ZERO);
+
+	while (Simulation.TIMELINE.hasNext())
 	{
-		Simulation.TIMELINE.reset();
-		
-		WireArray a = new WireArray(4, 1);
-		a.createInput().feedSignals(Bit.ONE, Bit.ONE, Bit.ONE, Bit.ONE);
-		
-		while(Simulation.TIMELINE.hasNext())
-		{
-			Simulation.TIMELINE.executeNext();
-		}
-		
-		assertEquals(a.getUnsignedValue(), 15);
-		assertEquals(a.getSignedValue(), -1);
+	    Simulation.TIMELINE.executeNext();
 	}
-	
-	@Test
-	void multipleInputs()
+
+	assertEquals(Bit.X, b.getValue());
+	assertEquals(Bit.ONE, a.getValue());
+
+	aI.clearSignals();
+	enI.feedSignals(Bit.ZERO);
+
+	while (Simulation.TIMELINE.hasNext())
 	{
-		Simulation.TIMELINE.reset();
-		WireArray w = new WireArray(2, 1);
-		WireArrayInput wI1 = w.createInput(), wI2 = w.createInput();
-		wI1.feedSignals(Bit.ONE, Bit.Z);
-		wI2.feedSignals(Bit.Z, Bit.X);
-		while(Simulation.TIMELINE.hasNext())
-		{
-			Simulation.TIMELINE.executeNext();
-		}
-		assertTrue(Arrays.equals(w.getValues(), new Bit[] { Bit.ONE, Bit.X }));
-		
-		wI2.feedSignals(Bit.ZERO, Bit.Z);
-		while(Simulation.TIMELINE.hasNext())
-		{
-			Simulation.TIMELINE.executeNext();
-		}
-		assertTrue(Arrays.equals(w.getValues(), new Bit[] { Bit.X, Bit.Z }));
-		
-		wI2.feedSignals(Bit.Z, Bit.Z);
-		while(Simulation.TIMELINE.hasNext())
-		{
-			Simulation.TIMELINE.executeNext();
-		}
-		assertTrue(Arrays.equals(w.getValues(), new Bit[] { Bit.ONE, Bit.Z }));
-		
-		wI2.feedSignals(Bit.ONE, Bit.Z);
-		w.addObserver((i) -> fail("WireArray notified observer, although value did not change."));
-		while(Simulation.TIMELINE.hasNext())
-		{
-			Simulation.TIMELINE.executeNext();
-		}
-		assertTrue(Arrays.equals(w.getValues(), new Bit[] { Bit.ONE, Bit.Z }));
+	    Simulation.TIMELINE.executeNext();
 	}
-	
-	@Test
-	void wireConnections()
+
+	assertEquals(Bit.ZERO, a.getValue());
+
+    }
+
+    @Test
+    void muxTest()
+    {
+	Simulation.TIMELINE.reset();
+	WireArray a = new WireArray(4, 3), b = new WireArray(4, 6), c = new WireArray(4, 4),
+		select = new WireArray(2, 5), out = new WireArray(4, 1);
+	WireArrayInput selectIn = select.createInput();
+
+	selectIn.feedSignals(Bit.ZERO, Bit.ZERO);
+	a.createInput().feedSignals(Bit.ONE, Bit.ZERO, Bit.ONE, Bit.ZERO);
+	c.createInput().feedSignals(Bit.ZERO, Bit.ONE, Bit.ZERO, Bit.ONE);
+
+	new Mux(1, out, select, a, b, c);
+	while (Simulation.TIMELINE.hasNext())
 	{
-		// Nur ein Experiment, was über mehrere 'passive' Bausteine hinweg passieren würde
-		
-		Simulation.TIMELINE.reset();
+	    Simulation.TIMELINE.executeNext();
+	}
 
-		WireArray a = new WireArray(1, 2);
-		WireArray b = new WireArray(1, 2);
-		WireArray c = new WireArray(1, 2);
-		WireArrayInput aI = a.createInput();
-		WireArrayInput bI = b.createInput();
-		WireArrayInput cI = c.createInput();
-
-		TestBitDisplay test = new TestBitDisplay(c);
-		LongConsumer print = time -> System.out.format("Time %2d\n   %s\n   %s\n   %s\n", time, a, b, c);
-
-		cI.feedSignals(Bit.ONE);
-		test.assertAfterSimulationIs(print, Bit.ONE);
-
-		cI.feedSignals(Bit.X);
-		test.assertAfterSimulationIs(print, Bit.X);
-
-		cI.feedSignals(Bit.X);
-		cI.feedSignals(Bit.Z);
-		test.assertAfterSimulationIs(print, Bit.Z);
-
-		Connector c1 = new Connector(b, c);
-		test.assertAfterSimulationIs(print, Bit.Z);
-		System.out.println("ONE");
-		bI.feedSignals(Bit.ONE);
-		test.assertAfterSimulationIs(print, Bit.ONE);
-		System.out.println("ZERO");
-		bI.feedSignals(Bit.ZERO);
-		test.assertAfterSimulationIs(print, Bit.ZERO);
-		System.out.println("Z");
-		bI.feedSignals(Bit.Z);
-		test.assertAfterSimulationIs(Bit.Z);
+	assertTrue(Arrays.equals(new Bit[] { Bit.ONE, Bit.ZERO, Bit.ONE, Bit.ZERO }, out.getValues()));
+	selectIn.feedSignals(Bit.ZERO, Bit.ONE);
+	while (Simulation.TIMELINE.hasNext())
+	{
+	    Simulation.TIMELINE.executeNext();
 	}
 
-	private static void assertBitArrayEquals(Bit[] actual, Bit... expected)
+	assertTrue(Arrays.equals(new Bit[] { Bit.ZERO, Bit.ONE, Bit.ZERO, Bit.ONE }, out.getValues()));
+
+	selectIn.feedSignals(Bit.ONE, Bit.ONE);
+	while (Simulation.TIMELINE.hasNext())
 	{
-		assertArrayEquals(expected, actual);
+	    Simulation.TIMELINE.executeNext();
 	}
+
+	assertTrue(Arrays.equals(new Bit[] { Bit.Z, Bit.Z, Bit.Z, Bit.Z }, out.getValues()));
+
+    }
+
+    @Test
+    void andTest()
+    {
+	Simulation.TIMELINE.reset();
+	AndGate gate = new AndGate(1, new WireArray(4, 1), new WireArray(4, 1), new WireArray(4, 1));
+	gate.getA().createInput().feedSignals(Bit.ONE, Bit.ONE, Bit.ZERO, Bit.ZERO);
+	gate.getB().createInput().feedSignals(Bit.ZERO, Bit.ONE, Bit.ZERO, Bit.ONE);
+
+	while (Simulation.TIMELINE.hasNext())
+	{
+	    Simulation.TIMELINE.executeNext();
+	}
+	assertTrue(Arrays.equals(gate.getOut().getValues(), new Bit[] { Bit.ZERO, Bit.ONE, Bit.ZERO, Bit.ZERO }));
+    }
+
+    @Test
+    void orTest()
+    {
+	Simulation.TIMELINE.reset();
+	OrGate gate = new OrGate(1, new WireArray(4, 1), new WireArray(4, 1), new WireArray(4, 1));
+	gate.getA().createInput().feedSignals(Bit.ONE, Bit.ONE, Bit.ZERO, Bit.ZERO);
+	gate.getB().createInput().feedSignals(Bit.ZERO, Bit.ONE, Bit.ZERO, Bit.ONE);
+
+	while (Simulation.TIMELINE.hasNext())
+	{
+	    Simulation.TIMELINE.executeNext();
+	}
+
+	assertTrue(Arrays.equals(gate.getOut().getValues(), new Bit[] { Bit.ONE, Bit.ONE, Bit.ZERO, Bit.ONE }));
+    }
+
+    @Test
+    void rsLatchCircuitTest()
+    {
+	Simulation.TIMELINE.reset();
+	WireArray r = new WireArray(1, 1), s = new WireArray(1, 1), t1 = new WireArray(1, 15), t2 = new WireArray(1, 1),
+		q = new WireArray(1, 1), nq = new WireArray(1, 1);
+
+	new OrGate(1, r, nq, t2);
+	new OrGate(1, s, q, t1);
+	new NotGate(1, t2, q);
+	new NotGate(1, t1, nq);
+
+	WireArrayInput sIn = s.createInput(), rIn = r.createInput();
+
+	sIn.feedSignals(Bit.ONE);
+	rIn.feedSignals(Bit.ZERO);
+
+	while (Simulation.TIMELINE.hasNext())
+	{
+	    Simulation.TIMELINE.executeNext();
+	}
+
+	assertEquals(q.getValue(), Bit.ONE);
+	assertEquals(nq.getValue(), Bit.ZERO);
+
+	sIn.feedSignals(Bit.ZERO);
+
+	while (Simulation.TIMELINE.hasNext())
+	{
+	    Simulation.TIMELINE.executeNext();
+	}
+
+	assertEquals(q.getValue(), Bit.ONE);
+	assertEquals(nq.getValue(), Bit.ZERO);
+
+	rIn.feedSignals(Bit.ONE);
+
+	while (Simulation.TIMELINE.hasNext())
+	{
+	    Simulation.TIMELINE.executeNext();
+	}
+
+	assertEquals(q.getValue(), Bit.ZERO);
+	assertEquals(nq.getValue(), Bit.ONE);
+    }
+
+    @Test
+    void numericValueTest()
+    {
+	Simulation.TIMELINE.reset();
+
+	WireArray a = new WireArray(4, 1);
+	a.createInput().feedSignals(Bit.ONE, Bit.ONE, Bit.ONE, Bit.ONE);
+
+	while (Simulation.TIMELINE.hasNext())
+	{
+	    Simulation.TIMELINE.executeNext();
+	}
+
+	assertEquals(a.getUnsignedValue(), 15);
+	assertEquals(a.getSignedValue(), -1);
+    }
+
+    @Test
+    void multipleInputs()
+    {
+	Simulation.TIMELINE.reset();
+	WireArray w = new WireArray(2, 1);
+	WireArrayInput wI1 = w.createInput(), wI2 = w.createInput();
+	wI1.feedSignals(Bit.ONE, Bit.Z);
+	wI2.feedSignals(Bit.Z, Bit.X);
+	while (Simulation.TIMELINE.hasNext())
+	{
+	    Simulation.TIMELINE.executeNext();
+	}
+	assertTrue(Arrays.equals(w.getValues(), new Bit[] { Bit.ONE, Bit.X }));
+
+	wI2.feedSignals(Bit.ZERO, Bit.Z);
+	while (Simulation.TIMELINE.hasNext())
+	{
+	    Simulation.TIMELINE.executeNext();
+	}
+	assertTrue(Arrays.equals(w.getValues(), new Bit[] { Bit.X, Bit.Z }));
+
+	wI2.feedSignals(Bit.Z, Bit.Z);
+	while (Simulation.TIMELINE.hasNext())
+	{
+	    Simulation.TIMELINE.executeNext();
+	}
+	assertTrue(Arrays.equals(w.getValues(), new Bit[] { Bit.ONE, Bit.Z }));
+
+	wI2.feedSignals(Bit.ONE, Bit.Z);
+	w.addObserver((i) -> fail("WireArray notified observer, although value did not change."));
+	while (Simulation.TIMELINE.hasNext())
+	{
+	    Simulation.TIMELINE.executeNext();
+	}
+	assertTrue(Arrays.equals(w.getValues(), new Bit[] { Bit.ONE, Bit.Z }));
+    }
+
+//	@Test
+//	void wireConnections()
+//	{
+//		// Nur ein Experiment, was über mehrere 'passive' Bausteine hinweg passieren würde
+//		
+//		Simulation.TIMELINE.reset();
+//
+//		WireArray a = new WireArray(1, 2);
+//		WireArray b = new WireArray(1, 2);
+//		WireArray c = new WireArray(1, 2);
+//		WireArrayInput aI = a.createInput();
+//		WireArrayInput bI = b.createInput();
+//		WireArrayInput cI = c.createInput();
+//
+//		TestBitDisplay test = new TestBitDisplay(c);
+//		LongConsumer print = time -> System.out.format("Time %2d\n   %s\n   %s\n   %s\n", time, a, b, c);
+//
+//		cI.feedSignals(Bit.ONE);
+//		test.assertAfterSimulationIs(print, Bit.ONE);
+//
+//		cI.feedSignals(Bit.X);
+//		test.assertAfterSimulationIs(print, Bit.X);
+//
+//		cI.feedSignals(Bit.X);
+//		cI.feedSignals(Bit.Z);
+//		test.assertAfterSimulationIs(print, Bit.Z);
+//
+//		Connector c1 = new Connector(b, c);
+//		test.assertAfterSimulationIs(print, Bit.Z);
+//		System.out.println("ONE");
+//		bI.feedSignals(Bit.ONE);
+//		test.assertAfterSimulationIs(print, Bit.ONE);
+//		System.out.println("ZERO");
+//		bI.feedSignals(Bit.ZERO);
+//		test.assertAfterSimulationIs(print, Bit.ZERO);
+//		System.out.println("Z");
+//		bI.feedSignals(Bit.Z);
+//		test.assertAfterSimulationIs(Bit.Z);
+//	}
+
+    private static void assertBitArrayEquals(Bit[] actual, Bit... expected)
+    {
+	assertArrayEquals(expected, actual);
+    }
 }