Add test files.

.github/workflows/nodejs.yml

@@ -9,7 +9,7 @@ jobs:
 
     strategy:
       matrix:
-        node-version: [8.x, 10.x, 12.x]
+        node-version: [12.x]
 
     steps:
     - uses: actions/checkout@v1

test/cpu.spec.js

@@ -0,0 +1,48 @@
+
+import CPU6502 from '../js/cpu6502';
+import Test6502 from './roms/6502test';
+import Test65C02 from './roms/65C02test';
+
+import { toHex } from '../js/util';
+
+describe('CPU', function () {
+    var cpu;
+    var lastPC = 0;
+    var done = false;
+
+    function traceCB() {
+        var pc = cpu.getPC();
+        done = lastPC == pc;
+        lastPC = pc;
+    }
+
+    describe('6502', function () {
+        it('completes the test ROM', function () {
+            cpu = new CPU6502();
+            var test = new Test6502();
+            cpu.addPageHandler(test);
+            cpu.setPC(0x400);
+
+            do {
+                cpu.stepCyclesDebug(1000, traceCB);
+            } while (!done);
+
+            expect(toHex(lastPC)).toEqual(toHex(0x3469));
+        });
+    });
+
+    describe('65C02', function () {
+        it('completes the test ROM', function () {
+            cpu = new CPU6502({'65C02': true});
+            var test = new Test65C02();
+            cpu.addPageHandler(test);
+            cpu.setPC(0x400);
+
+            do {
+                cpu.stepCyclesDebug(1000, traceCB);
+            } while (!done);
+
+            expect(toHex(lastPC)).toEqual(toHex(0x24f1));
+        });
+    });
+});