@geogirafe/lib-geoportal/base/GirafeSingleton.spec.js

GeoGirafe is a flexible application to build online geoportals.

import { describe, it, expect } from 'vitest';
import GirafeSingleton from './GirafeSingleton';
describe('GirafeSingleton.getInstance', () => {
    it('should throw error when directly instantiated', () => {
        expect(() => new GirafeSingleton('test')).toThrowError('This is a singleton. Please use the getInstance() method.');
    });
    it('should create a singleton instance using getInstance method', () => {
        class TestSingleton extends GirafeSingleton {
        }
        const instance1 = TestSingleton.getInstance();
        const instance2 = TestSingleton.getInstance();
        expect(instance1).toBe(instance2);
    });
});
describe('GirafeSingleton.isNullOrUndefined', () => {
    it('isNullOrUndefined tests', () => {
        class TestSingleton extends GirafeSingleton {
        }
        const instance = TestSingleton.getInstance();
        expect(instance.isNullOrUndefined(undefined)).toBe(true);
        expect(instance.isNullOrUndefined(null)).toBe(true);
        expect(instance.isNullOrUndefined('')).toBe(false);
        expect(instance.isNullOrUndefined(0)).toBe(false);
        expect(instance.isNullOrUndefined(false)).toBe(false);
        expect(instance.isNullOrUndefined('string')).toBe(false);
        expect(instance.isNullOrUndefined({})).toBe(false);
        expect(instance.isNullOrUndefined([])).toBe(false);
    });
});
describe('GirafeSingleton.isNullOrUndefinedOrBlank', () => {
    it('isNullOrUndefinedOrBlank tests', () => {
        class TestSingleton extends GirafeSingleton {
        }
        const instance = TestSingleton.getInstance();
        expect(instance.isNullOrUndefinedOrBlank(undefined)).toBe(true);
        expect(instance.isNullOrUndefinedOrBlank(null)).toBe(true);
        expect(instance.isNullOrUndefinedOrBlank('')).toBe(true);
        expect(instance.isNullOrUndefinedOrBlank(0)).toBe(false);
        expect(instance.isNullOrUndefinedOrBlank(false)).toBe(false);
        expect(instance.isNullOrUndefinedOrBlank('string')).toBe(false);
        expect(instance.isNullOrUndefinedOrBlank({})).toBe(false);
        expect(instance.isNullOrUndefinedOrBlank([])).toBe(false);
    });
});