Getting started with the new buttons setup.

package.json

@@ -0,0 +1,26 @@
+{
+  "name": "buttons-computer",
+  "version": "1.0.0",
+  "description": "A simple toy fantasty computer to learn about computer using javascript.",
+  "main": "src/index.js",
+  "type": "module",
+  "directories": {
+    "test": "tests"
+  },
+  "scripts": {
+    "test": "ava test tests"
+  },
+  "repository": {
+    "type": "git",
+    "url": "git@git.learnjsthehardway.com:learn-javascript-the-hard-way/buttons-computer"
+  },
+  "keywords": [
+    "javascript",
+    "fantasy-computer"
+  ],
+  "author": "Zed A. Shaw",
+  "license": "AGPL-3.0-or-later",
+  "dependencies": {
+    "ava": "^4.2.0"
+  }
+}

src/buttons.js

@@ -1,6 +1,6 @@
 
 
-class ButtonMachine {
+export class ButtonMachine {
 
   constructor(code) {
     this.stack = [];
@@ -28,7 +28,7 @@ class ButtonMachine {
   }
 
   /* Need to use a function because @babel/plugin-proposal-class-properties */
-  static register_names() { 
+  static register_names() {
     return ['AX', 'BX', 'CX', 'DX'];
   }
 
@@ -192,4 +192,6 @@ class ButtonMachine {
   }
 }
 
-module.exports = { ButtonMachine };
+export default {
+  ButtonMachine
+};

tests/basic.btn

@@ -0,0 +1,7 @@
+PUSH 10
+PUSH 1
+SUB
+JZ 5
+JUMP 1
+PUSH 100
+HALT

tests/basic_tests.js

@@ -0,0 +1,17 @@
+import { ButtonMachine } from "../src/buttons.js";
+
+const cpu = new ButtonMachine([
+  ["PUSH", 10],
+  ["PUSH", 1],
+  ["SUB"],
+  ["JZ", 5],
+  ["JUMP", 1],
+  ["PUSH", 100],
+  ["HALT"]
+]);
+
+cpu.run();
+
+console.log("STACK TOP", cpu.stack_top);
+console.log("REGISTER", cpu.register_entries);
+console.log("STACK", cpu.stack);