youtube-dl-gui/tests/Settings.test.js

const fs = require('fs').promises;
const os = require("os");
const Settings = require('../modules/persistence/Settings');
const env = {version: "2.0.0-test1"};
const defaultSettingsInstance = new Settings({settings: "tests/test-settings.json"}, env, "none", "", true, true, false, true, "%(title).200s-(%(height)sp%(fps).0d).%(ext)s", "%(title).200s-(%(height)sp%(fps).0d).%(ext)s", "click", "49", 8, true, true, "C:\\Users\\user\\cookies.txt", false, true, false, false, true, "dark");
const defaultSettings = "{\"outputFormat\":\"none\",\"proxy\":\"\",\"autoFillClipboard\":true,\"spoofUserAgent\":true,\"validateCertificate\":false,\"taskList\":true,\"nameFormat\":\"%(title).200s-(%(height)sp%(fps).0d).%(ext)s\",\"nameFormatMode\":\"%(title).200s-(%(height)sp%(fps).0d).%(ext)s\",\"sizeMode\":\"click\",\"splitMode\":\"49\",\"maxConcurrent\":8,\"defaultConcurrent\":8,\"updateBinary\":true,\"updateApplication\":true,\"statSend\":false,\"downloadMetadata\":true,\"downloadThumbnail\":false,\"keepUnmerged\":false,\"calculateTotalSize\":true,\"theme\":\"dark\",\"version\":\"2.0.0-test1\"}"

describe('Load settings from file', () => {
    beforeEach(() => {
        jest.clearAllMocks();
        fs.writeFile = jest.fn().mockResolvedValue("");
        console.log = jest.fn().mockImplementation(() => {});
    });
    it('reads the specified file', () => {
        const readFileSpy = jest.spyOn(fs, 'readFile');
        return Settings.loadFromFile({settings: "tests/test-settings.json"}, env).then((data) => {
            expect(readFileSpy).toBeCalledTimes(1);
        });
    });
    it('returns a settings instance', () => {
        return Settings.loadFromFile({settings: "tests/test-settings.json"}, env).then((data) => {
            expect(data).toBeInstanceOf(Settings);
        });
    });
    it('returns a settings instance with the right values', () => {
        return Settings.loadFromFile({settings: "tests/test-settings.json"}, env).then((data) => {
            expect(data).toMatchObject(defaultSettingsInstance);
        });
    });
});


describe('Create new settings file on error', () => {
    beforeEach(() => {
        jest.clearAllMocks();
        os.cpus = jest.fn().mockImplementation(() => { return new Array(16) });
        fs.writeFile = jest.fn().mockResolvedValue("");
        console.log = jest.fn().mockImplementation(() => {});
    });
    it('uses the path defined in paths', () => {
        return Settings.loadFromFile({settings: "tests/non-existent-file.json"}, env).then(() => {
            expect(fs.writeFile.mock.calls[0]).toContain("tests/non-existent-file.json");
        });
    }) ;
    it('writes the new settings file', () => {
        return Settings.loadFromFile({settings: "tests/non-existent-file.json"}, env).then(() => {
            expect(fs.writeFile).toHaveBeenCalledTimes(1);
        });
    });
    it('writes the given settings', () => {
        return Settings.loadFromFile({settings: "tests/non-existent-file.json"}, env).then(() => {
            expect(fs.writeFile.mock.calls[0]).toContainEqual(defaultSettings);
        });
    });
});

describe('Update settings to file', () => {
    beforeEach(() => {
        jest.clearAllMocks();
        fs.writeFile = jest.fn().mockResolvedValue("");
        env.appUpdater = { setUpdateSetting: jest.fn() };
        env.changeMaxConcurrent = jest.fn();
        console.log = jest.fn().mockImplementation(() => {});
    });
    it('writes the updated file', () => {
        return Settings.loadFromFile({settings: "tests/test-settings.json"}, env).then(data => {
            delete data.cookiePath;
            data.update(JSON.parse(defaultSettings));
            expect(fs.writeFile).toBeCalledTimes(1);
            expect(fs.writeFile.mock.calls[0]).toContainEqual(defaultSettings);
        });
    });
    it('updates the maxConcurrent value when it changes', () => {
        const changedDefaultSettings = JSON.parse(defaultSettings);
        changedDefaultSettings.maxConcurrent = 4;

        return Settings.loadFromFile({settings: "tests/test-settings.json"}, env).then(data => {
            data.update(changedDefaultSettings);
            expect(env.changeMaxConcurrent).toBeCalledTimes(1);
        });
    });
});