@faisalrmdhn08/allin-cli
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A modern full-stack CLI tool based on Typescript designed to accelerate your app development process — setup your entire stack in one seamless command.
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JavaScript
/**
* __tests__/guard.test.ts
*/
import { jest } from '@jest/globals';
import { isBackend, isFrontend, isNull, isUndefined, hasValue, } from '../utils/guard.js';
describe('Testing guard.ts util functions', () => {
beforeEach(() => {
jest.clearAllMocks();
});
describe('isUndefined()', () => {
it('returns true for undefined', () => {
expect(isUndefined(undefined)).toBe(true);
});
it('returns false for non-undefined values', () => {
expect(isUndefined(null)).toBe(false);
expect(isUndefined(0)).toBe(false);
expect(isUndefined('')).toBe(false);
expect(isUndefined('frontend')).toBe(false);
});
});
describe('isNull()', () => {
it('returns true for null', () => {
expect(isNull(null)).toBe(true);
});
it('returns false for non-null values', () => {
expect(isNull(undefined)).toBe(false);
expect(isNull(0)).toBe(false);
expect(isNull('')).toBe(false);
expect(isNull('backend')).toBe(false);
});
});
describe('hasValue()', () => {
it('returns true for non-empty strings after trim', () => {
expect(hasValue('a')).toBe(true);
expect(hasValue(' a ')).toBe(true);
expect(hasValue('0')).toBe(true);
});
it('returns false for empty, whitespace-only, non-string or undefined/null', () => {
expect(hasValue('')).toBe(false);
expect(hasValue(' ')).toBe(false);
expect(hasValue(undefined)).toBe(false);
expect(hasValue(null)).toBe(false);
expect(hasValue(0)).toBe(false);
});
});
describe('isFrontend()', () => {
it('returns true when value is exactly "frontend"', () => {
expect(isFrontend('frontend')).toBe(true);
});
it('returns false for other values (case-sensitive and type-strict)', () => {
expect(isFrontend('Frontend')).toBe(false);
expect(isFrontend('backend')).toBe(false);
expect(isFrontend('')).toBe(false);
expect(isFrontend(null)).toBe(false);
expect(isFrontend(undefined)).toBe(false);
});
});
describe('isBackend()', () => {
it('returns true when value is exactly "backend"', () => {
expect(isBackend('backend')).toBe(true);
});
it('returns false for other values (case-sensitive and type-strict)', () => {
expect(isBackend('Backend')).toBe(false);
expect(isBackend('frontend')).toBe(false);
expect(isBackend('')).toBe(false);
expect(isBackend(null)).toBe(false);
expect(isBackend(undefined)).toBe(false);
});
});
});
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