Fixed Node Save States, and added a test (#313)

* Fixed Node Save States, and added a test

* Added tests to travis

Author: torch2424

.travis.yml

@@ -7,4 +7,7 @@ node_js:
 install:
   - npm install
 script:
-  - npm run prettier:lint && npm run demo:build:apps && npm run test:accuracy:nobuild
+  - npm run prettier:lint
+  - npm run demo:build:apps
+  - npm run test:accuracy:nobuild
+  - npm run test:integration:nobuild

lib/memory/idb.js

@@ -66,6 +66,15 @@ if (typeof window !== 'undefined') {
       });
     }
   };
+} else {
+  // Create a mock keyval for node
+  keyval = {
+    get: () => {},
+    set: () => {},
+    delete: () => {},
+    clear: () => {},
+    keys: () => {}
+  };
 }
 
 export const idbKeyval = keyval;

package.json

@@ -67,6 +67,8 @@
     "test:perf": "npm run test:performance",
     "test:performance": "npx run-s build test:performance:nobuild",
     "test:performance:nobuild": "node --experimental-worker node_modules/mocha/bin/_mocha test/performance/performance-test.js --exit",
+    "test:integration": "npx run-s build test:integration:nobuild",
+    "test:integration:nobuild": "node --experimental-worker node_modules/mocha/bin/_mocha test/integration/integration-test.js --exit",
     "debugger:dev": "npm run debugger:watch",
     "debugger:watch": "npx rollup -c -w --environment DEBUGGER,SERVE",
     "debugger:build": "npx rollup -c --environment DEBUGGER",

test/integration/integration-test.js

@@ -0,0 +1,87 @@
+// Test the general WasmBoy Library
+
+// Common test functions
+const commonTest = require('../common-test');
+
+// Wasm Boy library
+const WasmBoy = require('../../dist/wasmboy.wasm.cjs.js').WasmBoy;
+
+// File management
+const fs = require('fs');
+
+// Assertion
+const assert = require('assert');
+
+// Initialize wasmBoy headless, with a speed option
+const WASMBOY_INITIALIZE_OPTIONS = {
+  headless: true,
+  gameboySpeed: 100.0,
+  isGbcEnabled: true
+};
+
+// Function for playing WasmBoy for a short amount of time
+const playWasmBoy = () => {
+  let playResolve = undefined;
+  const playPromise = new Promise(resolve => {
+    playResolve = resolve;
+  });
+
+  WasmBoy.play().then(() => {
+    setTimeout(() => {
+      WasmBoy.pause().then(() => {
+        playResolve();
+      });
+    }, 100);
+  });
+
+  return playPromise;
+};
+
+// Path to roms we want to test
+const testRomsPath = './test/performance/testroms';
+
+// Print our version
+console.log(`WasmBoy version: ${WasmBoy.getVersion()}`);
+
+describe('WasmBoy Lib', () => {
+  // Define our wasmboy instance
+  // Not using arrow functions, as arrow function timeouts were acting up
+  beforeEach(function(done) {
+    // Set a timeout of 5000, takes a while for wasm module to parse
+    this.timeout(75000);
+
+    // Read the test rom a a Uint8Array and pass to wasmBoy
+    const testRomArray = new Uint8Array(fs.readFileSync(`${testRomsPath}/back-to-color/back-to-color.gbc`));
+
+    // Reset WasmBoy, and then load the rom
+    WasmBoy.reset(WASMBOY_INITIALIZE_OPTIONS)
+      .then(() => {
+        return WasmBoy.loadROM(testRomArray);
+      })
+      .then(() => {
+        done();
+      });
+  });
+
+  it('should be able to save/load state', async () => {
+    // Play a snippet of WasmBoy
+    await playWasmBoy();
+
+    // Save State
+    const saveState = await WasmBoy.saveState();
+
+    // Play a snippet of WasmBoy
+    await playWasmBoy();
+
+    // Load State
+    await WasmBoy.loadState(saveState);
+
+    // Save State
+    const saveStateTwo = await WasmBoy.saveState();
+
+    // Save State should be the same
+    const saveStateInternalState = new Uint8Array(saveState.wasmboyMemory.wasmBoyInternalState);
+    const saveStateTwoInternalState = new Uint8Array(saveState.wasmboyMemory.wasmBoyInternalState);
+    assert(saveStateInternalState[0] === saveStateTwoInternalState[0], true);
+  });
+});