chore: migrate to vitest

package.json

@@ -38,8 +38,8 @@
     "lint": "eslint ./src/ --fix",
     "prepare": "husky install && wds ./scripts/download-device-descriptors.ts",
     "semantic-release": "semantic-release",
-    "test:watch": "jest --watch",
-    "test": "jest --coverage",
+    "test:watch": "vitest --watch --config test/vitest.config.ts",
+    "test": "vitest --coverage --config test/vitest.config.ts",
     "typecheck": "tsc --noEmit"
   },
   "repository": {
@@ -85,22 +85,21 @@
     "@types/w3c-web-serial": "^1.0.2",
     "@typescript-eslint/eslint-plugin": "^4.22.0",
     "@typescript-eslint/parser": "^4.22.0",
+    "c8": "^7.11.3",
     "codecov": "^3.8.3",
     "eslint": "^7.25.0",
     "eslint-config-prettier": "^8.3.0",
     "eslint-plugin-node": "^11.1.0",
     "eslint-plugin-prettier": "^3.4.0",
     "husky": "^6.0.0",
-    "jest": "^27.2.0",
     "lint-staged": "^10.5.4",
     "node-fetch": "^2.6.7",
     "prettier": "^2.2.1",
     "rollup": "^2.76.0",
     "rollup-plugin-polyfill-node": "^0.10.1",
     "semantic-release": "^19.0.2",
-    "ts-jest": "^27.0.5",
-    "ts-node": "^10.2.1",
     "typescript": "^4.2.4",
+    "vitest": "^0.18.0",
     "wds": "^0.12.0",
     "xstate": "^4.32.1"
   },
@@ -118,6 +117,8 @@
     ]
   },
   "dependencies": {
+    "@serialport/bindings-cpp": "^10.7.0",
+    "@serialport/bindings-interface": "^1.2.2",
     "@serialport/parser-regex": "^10.3.0",
     "debug": "^4.3.4",
     "serialport": "^10.4.0"

src/BaseDevice.ts

@@ -63,7 +63,7 @@ export class BaseDevice {
       const timeout = setTimeout(() => {
         debug(`Timeout executing "${formattedCommand}"`);
         this.#port.off('data', handleResponse);
-        _reject('command timed out');
+        _reject(new Error('command timed out'));
       }, TIMEOUT_MS);
 
       const cleanup = () => {
@@ -81,7 +81,7 @@ export class BaseDevice {
       const reject = (errorMessage: string) => {
         debug(`Error executing "${formattedCommand}" - ${errorMessage}`);
         cleanup();
-        _reject(errorMessage);
+        _reject(new Error(errorMessage));
       };
 
       const handleResponse = (rawData: string) => {

src/PirateMidiDevice.ts

@@ -7,6 +7,8 @@ import { WebSerialPort } from './serial/WebSerialPort';
 import EventEmitter from 'events';
 import { DevicePortMock } from '../test/mocks/DevicePortMock';
 
+type DeviceTypes = keyof typeof deviceDescriptors;
+
 export class PirateMidiDevice extends EventEmitter {
   deviceInfo?: DeviceInfo;
   baseDevice: BaseDevice;
@@ -25,7 +27,7 @@ export class PirateMidiDevice extends EventEmitter {
     });
   }
 
-  getDeviceDescription() {
+  getDeviceDescription(): typeof deviceDescriptors[DeviceTypes] {
     if (!this.deviceInfo) throw new Error('No device info available');
     return deviceDescriptors[this.deviceInfo.deviceModel];
   }

src/index.spec.ts

@@ -1,19 +1,18 @@
 import { getDevices } from '.';
-import * as SerialPortModule from 'serialport';
 import { PirateMidiDevice } from './PirateMidiDevice';
+import * as DevicePortMockModule from '../test/mocks/DevicePortMock';
 import { MockBinding } from '@serialport/binding-mock';
+import { vi } from 'vitest';
 
-jest.mock('serialport', () => {
-  const actual = jest.requireActual('serialport');
-  const { SerialPortMock } = actual;
+vi.mock('./serial/NodeSerialPort', async () => {
+  const { DevicePortMock } = await vi.importActual<typeof DevicePortMockModule>(
+    '../test/mocks/DevicePortMock'
+  );
   return {
-    ...actual,
-    SerialPort: SerialPortMock,
-  } as typeof SerialPortModule;
+    NodeSerialPort: DevicePortMock,
+  };
 });
 
-jest.mock('./PirateMidiDevice');
-
 describe('index', () => {
   describe('getDevices', () => {
     describe('no devices available', () => {
@@ -32,7 +31,7 @@ describe('index', () => {
           productId: '5740',
         });
 
-        const devices = await getDevices();
+        const devices = await getDevices({ binding: MockBinding });
 
         expect(devices).toHaveLength(1);
         expect(devices[0]).toBeInstanceOf(PirateMidiDevice);

src/index.ts

@@ -2,17 +2,50 @@ import { PirateMidiDevice } from './PirateMidiDevice';
 import { NodeSerialPort } from './serial/NodeSerialPort';
 import { GetDevices } from './types';
 
+import { SerialPortStream } from '@serialport/stream';
+import { autoDetect } from '@serialport/bindings-cpp';
+import { BindingInterface } from '@serialport/bindings-interface';
+
 export * from './types';
 export { PirateMidiDevice } from './PirateMidiDevice';
 export { ValidationError } from './ValidationError';
 
+type Binding = BindingInterface;
+
+/**
+ * Device manufacturer key, use to filter USB devices
+ */
+const MANUFACTURER = 'Pirate MIDI';
+
+const getPorts = async (
+  binding: Binding = autoDetect()
+): Promise<Array<NodeSerialPort>> => {
+  // TODO: error handling
+  const portsInfo = await binding.list();
+  return Promise.all(
+    portsInfo
+      .filter(({ manufacturer }) => manufacturer === MANUFACTURER)
+      .map(portInfo => {
+        const port = new SerialPortStream({
+          binding,
+          path: portInfo.path,
+          baudRate: 9600,
+          autoOpen: false,
+        });
+        return new NodeSerialPort(port);
+      })
+  );
+};
+
 /**
  * Get any available Pirate Midi devices with device info set
+ * @param options.binding - On NodeJS optionally provide an OS binding for serialport (mostly useful for testing)
  */
-export const getDevices: GetDevices = async () => {
+export const getDevices: GetDevices = async ({ binding } = {}) => {
   // TODO: error handling
 
-  const ports = await NodeSerialPort.list();
+  const ports = await getPorts(binding);
+
   return Promise.all(
     ports.map(async port => {
       await port.connect();

src/serial/NodeSerialPort.ts

@@ -7,11 +7,6 @@ import EventEmitter from 'events';
  */
 const DELIMITER = '~';
 
-/**
- * Device manufacturer key, use to filter USB devices
- */
-const MANUFACTURER = 'Pirate MIDI';
-
 /**
  * Maintain node serial port for device
  */
@@ -31,29 +26,11 @@ export class NodeSerialPort extends EventEmitter {
     this.#parser.on('data', data => this.emit('data', data));
   }
 
-  static async list(): Promise<Array<NodeSerialPort>> {
-    // TODO: error handling
-    const portsInfo = await SerialPort.list();
-    return Promise.all(
-      portsInfo
-        .filter(({ manufacturer }) => manufacturer === MANUFACTURER)
-        .map(portInfo => {
-          const port = new SerialPort({
-            path: portInfo.path,
-            baudRate: 9600,
-            autoOpen: false,
-          });
-          return new NodeSerialPort(port);
-        })
-    );
-  }
-
   async connect(): Promise<void> {
-    // Auto open doesn't wait so manually open
-    const error = await new Promise(resolve => {
-      this.#port.open(resolve);
+    // Auto open is async so instead we'll manually open it so we can wait for it
+    return new Promise<void>((resolve, reject) => {
+      this.#port.open(error => (error ? reject(error) : resolve()));
     });
-    if (error) throw error;
   }
 
   write(data: string): void {

src/types/index.ts

@@ -1,11 +1,18 @@
 import { PirateMidiDevice } from '../PirateMidiDevice';
+import { BindingInterface } from '@serialport/bindings-interface';
 
 export * from './Commands';
 export * from './DeviceInfo';
 export * from './GlobalSettings';
 export * from './BankSettings';
 
+interface Options {
+  binding?: BindingInterface;
+}
+
 /**
  * Default export
  */
-export type GetDevices = () => Promise<Array<PirateMidiDevice>>;
+export type GetDevices = (
+  options?: Options
+) => Promise<Array<PirateMidiDevice>>;

test/mocks/DevicePortMock.ts

@@ -37,6 +37,10 @@ export class DevicePortMock extends EventEmitter {
     this.emit('data', response);
   };
 
+  connect(): Promise<void> {
+    return new Promise(resolve => setTimeout(resolve));
+  }
+
   write(buffer: Buffer): boolean {
     const rawData = Buffer.from(buffer).toString();
 

test/mocks/device.spec.ts

@@ -4,7 +4,7 @@ import { createDevice } from './device';
  * Collects responses and check them once the expected amount is reached
  * Caveats: does not check for superfluous responses, will hang when responses are missing
  */
-const assertResponses = (expected: string[], done: () => void) => {
+const assertResponses = (expected: string[], done: (_?: any) => void) => {
   const responses: string[] = [];
   return (response: string) => {
     responses.push(response);
@@ -21,51 +21,55 @@ const assertResponses = (expected: string[], done: () => void) => {
 
 describe('deviceMachine', () => {
   describe('CHCK', () => {
-    it('should return deviceInfo immediately', done => {
-      const device = createDevice({
-        onResponse: assertResponses(['0,{"deviceName":"Bridge 6"}~'], done),
-      });
-
-      device.send('0,CHCK~');
-    });
+    it('should return deviceInfo immediately', () =>
+      new Promise(done => {
+        const device = createDevice({
+          onResponse: assertResponses(['0,{"deviceName":"Bridge 6"}~'], done),
+        });
+
+        device.send('0,CHCK~');
+      }));
   });
 
   describe('CTRL', () => {
-    it('should return ok for command and args', done => {
-      const device = createDevice({
-        onResponse: assertResponses(['0,ok~', '1,ok~'], done),
-      });
-
-      device.send('0,CTRL~');
-      device.send('1,bankUp~');
-    });
+    it('should return ok for command and args', () =>
+      new Promise(done => {
+        const device = createDevice({
+          onResponse: assertResponses(['0,ok~', '1,ok~'], done),
+        });
+
+        device.send('0,CTRL~');
+        device.send('1,bankUp~');
+      }));
   });
 
   describe('DREQ', () => {
-    it('should return ok and requested data', done => {
-      const device = createDevice({
-        onResponse: assertResponses(['0,ok~', '1,{"currentBank":0}~'], done),
-      });
-
-      device.send('0,DREQ~');
-      device.send('1,globalSettings~');
-    });
+    it('should return ok and requested data', () =>
+      new Promise(done => {
+        const device = createDevice({
+          onResponse: assertResponses(['0,ok~', '1,{"currentBank":0}~'], done),
+        });
+
+        device.send('0,DREQ~');
+        device.send('1,globalSettings~');
+      }));
   });
 
   describe('DTXR', () => {
-    it('should return ok for each step', done => {
-      const device = createDevice({
-        onResponse: assertResponses(['0,ok~', '1,ok~', '2,ok~'], done),
-      });
-
-      device.send('0,DTXR~');
-      device.send('1,globalSettings~');
-      device.send(
-        `2,${JSON.stringify({
-          name: 'Bridge 8',
-        })}~`
-      );
-    });
+    it('should return ok for each step', () =>
+      new Promise(done => {
+        const device = createDevice({
+          onResponse: assertResponses(['0,ok~', '1,ok~', '2,ok~'], done),
+        });
+
+        device.send('0,DTXR~');
+        device.send('1,globalSettings~');
+        device.send(
+          `2,${JSON.stringify({
+            name: 'Bridge 8',
+          })}~`
+        );
+      }));
   });
 
   describe('RSET', () => {
@@ -82,15 +86,19 @@ describe('deviceMachine', () => {
       expect(device.state.context.response).toBeUndefined();
     });
 
-    it('should behave as expected after reset', done => {
-      const device = createDevice({
-        onResponse: assertResponses(['0,ok~', '1,ok~', '2,ok~', '3,ok~'], done),
-      });
-
-      device.send('0,DTXR~');
-      device.send('1,RSET~');
-      device.send('2,CTRL~');
-      device.send('3,bankUp~');
-    });
+    it('should behave as expected after reset', () =>
+      new Promise(done => {
+        const device = createDevice({
+          onResponse: assertResponses(
+            ['0,ok~', '1,ok~', '2,ok~', '3,ok~'],
+            done
+          ),
+        });
+
+        device.send('0,DTXR~');
+        device.send('1,RSET~');
+        device.send('2,CTRL~');
+        device.send('3,bankUp~');
+      }));
   });
 });

test/vitest.config.ts

@@ -0,0 +1,7 @@
+import { defineConfig } from 'vitest/config';
+
+export default defineConfig({
+  test: {
+    globals: true,
+  },
+});

tsconfig.json

@@ -13,9 +13,9 @@
     "types": [
       "node",
       "w3c-web-serial",
-      "jest"
+      "vitest/globals"
     ]
   },
-  "include": ["src/**/*.ts", "scripts/**/*.ts"],
+  "include": ["src/**/*.ts", "scripts/**/*.ts", "test/**/*.ts"],
   "exclude": ["lib"]
 }