First automated test with a simple bit of fuzzing and some simple test files.

package.json

@@ -8,7 +8,8 @@
     "test": "tests"
   },
   "scripts": {
-    "test": "ava test tests"
+    "test": "ava test tests",
+    "test-watch": "nodemon --exec npx ava tests"
   },
   "repository": {
     "type": "git",
@@ -21,6 +22,7 @@
   "author": "Zed A. Shaw",
   "license": "AGPL-3.0-or-later",
   "dependencies": {
-    "ava": "^4.2.0"
+    "ava": "^4.2.0",
+    "nodemon": "^2.0.15"
   }
 }

src/buttons.js

@@ -412,11 +412,13 @@ export class ButtonMachine {
     if(this.running) {
       let [op, data] = this.cur_op;
       let op_func = this[`op_${op}`];
-      this.assert(op_func !== undefined, `Invalid operation ${op}`);
+
+      if(this.assert(op_func !== undefined, `Invalid operation ${op}`)) {
         op_func.call(this, data);
         this.tick++;
       }
     }
+  }
 
   /**
    * Executes all lines of code until the end.  You can

tests/basic_tests.js

@@ -1,26 +1,38 @@
+import test from "ava";
+import fs from "fs";
 import { ButtonMachine } from '../src/buttons.js';
 
-let code = [
+const run_code = (source) => {
-  ['PUSH', -10],
+  const machine = new ButtonMachine();
-  ['PUSH', 1],
+  const code = machine.parse(source.toString());
-  ['ADD'],
-  ['POKE', 1],
-  ['JNZ', 1],
-  ['STOR', 'IX'],
-  ['POP'],
-  ['PEEK', 1],
-  ['JNZ', 6],
-];
-
-let machine = new ButtonMachine();
   machine.load(code);
+  machine.run();
 
-const ops = ButtonMachine.operations();
+  return machine;
-const registers = machine.register_names();
+}
 
-machine.run();
+test("parse and run file", t => {
+  const test_src = [
+    ["./tests/basic.btn", 74],
+    ["./tests/test2.btn", 0]
+  ]
+
+  for(let [source, expected] of test_src) {
+    console.log("TESTING FILE", source, "EXPECTING", expected);
+    const code = fs.readFileSync(source);
+    const machine = run_code(code);
+
+    t.is(machine.stack_top, expected);
 
     console.log("STACK TOP", machine.stack_top);
-console.log("REGISTERS", registers);
+  }
-console.log("STACK", machine.stack);
+});
-console.log("RAM", machine.ram);
+
+test("fuzz the parser", t => {
+  const code = fs.readFileSync("./tests/garbag1.btn");
+  const machine = run_code(code);
+
+  t.is(machine.halted, true);
+  t.is(machine.error_line, 0);
+
+});

tests/garbag1.btn

@@ -0,0 +1,9 @@
+asdlkj
+sadf
+sad
+fas
+ f
+ sadfg
+ asdflkhja sdflk;jas
+
+ sad'dfkjlsadflkjsadfjlsad

tests/test2.btn

@@ -0,0 +1,9 @@
+PUSH -10
+PUSH 1
+ADD
+POKE 1
+JNZ 1
+STOR IX
+POP
+PEEK 1
+JNZ 6