opengpio/src/classes/GpioDriver.spec.ts

A performant c++ based general purpose GPIO controller for linux devices. OpenGPIO is written using libgpiod, line & chip based abstractions.

import { GpioDriver } from './GpioDriver';
import EventEmitter from 'events';

describe('GpioDriver', () => {
    let cleanupMock: jest.Mock;
    let driver: GpioDriver;

    beforeEach(() => {
        cleanupMock = jest.fn();
        driver = new GpioDriver(cleanupMock);
    });

    afterEach(() => {
        jest.clearAllMocks();
    });

    it('should register a new driver and emit debug logs', () => {
        expect(driver).toBeInstanceOf(EventEmitter);
        expect(cleanupMock).not.toHaveBeenCalled();
    });

    it('should return the correct stopped value', () => {
        expect(driver.stopped).toBe(false);
        driver.stop();
        expect(driver.stopped).toBe(true);
    });

    it('should call the cleanup callback when stopped', () => {
        driver.stop();
        expect(cleanupMock).toHaveBeenCalledTimes(1);
    });

    it('should not call cleanup callback if already stopped', () => {
        driver.stop();
        driver.stop();
        expect(cleanupMock).toHaveBeenCalledTimes(1);
    });

    it('should clean up all drivers on process beforeExit', () => {
        const secondDriver = new GpioDriver(jest.fn());
        const stopSpy1 = jest.spyOn(driver, 'stop');
        const stopSpy2 = jest.spyOn(secondDriver, 'stop');

        process.emit('beforeExit', 0);

        expect(stopSpy1).toHaveBeenCalledTimes(1);
        expect(stopSpy2).toHaveBeenCalledTimes(1);
    });
});