Add a test for the fix for #439, and start on #204

tests/integration/via.js

@@ -1,14 +1,24 @@
-import * as utils from "../../utils.js";
 import { describe, it } from "mocha";
 import { TestMachine } from "./test-machine.js";
 import assert from "assert";
 
+async function runViaProgram(source) {
+    const testMachine = new TestMachine();
+    await testMachine.initialise();
+    await testMachine.runUntilInput();
+    await testMachine.loadBasic(source);
+
+    testMachine.captureText((elem) => console.log(`emulator output: ${elem.text}`));
+    await testMachine.type("RUN");
+    await testMachine.runUntilInput();
+    return testMachine;
+}
+
 describe("should pass scarybeasts' VIA tests", function () {
     // Code here extracted and paraphrased from the SSD zipfile from https://github.com/mattgodbolt/jsbeeb/issues/179
     it("VIA.AC1 - Does ACR write restart timer?", async function () {
-        // REM REAL BBC! 64, 0, 0, 128
-        // REM JSBEEB: 64, 0, 0, 128
-        const source = `
+        // Real BBC: 64, 0, 0, 128
+        const testMachine = await runViaProgram(`
 DIM MC% 100
 R% = &200
 P% = MC%
@@ -51,15 +61,7 @@ PRINT "REAL BBC: 64, 0, 0, 128"
 PRINT ?(R%)
 PRINT ?(R%+1)
 PRINT ?(R%+2)
-PRINT ?(R%+3)`;
-        const testMachine = new TestMachine();
-        await testMachine.initialise();
-        await testMachine.runUntilInput();
-        await testMachine.loadBasic(source);
-
-        testMachine.captureText((elem) => console.log(`emulator output: ${elem.text}`));
-        await testMachine.type("RUN");
-        await testMachine.runUntilInput();
+PRINT ?(R%+3)`);
         assert.equal(testMachine.readbyte(0x200), 64);
         assert.equal(testMachine.readbyte(0x201), 0);
         assert.equal(testMachine.readbyte(0x202), 0);