import { describe, it, expect } from 'vitest';
import { Guards } from '../../../src/shared/utils/Guards';

describe('Guards', () => {
    describe('isNullOrUndefined', () => {
        it('should return true for null', () => {
            expect(Guards.isNullOrUndefined(null)).toBe(true);
        });

        it('should return true for undefined', () => {
            expect(Guards.isNullOrUndefined(undefined)).toBe(true);
        });

        it('should return false for other values', () => {
            expect(Guards.isNullOrUndefined(0)).toBe(false);
            expect(Guards.isNullOrUndefined('')).toBe(false);
            expect(Guards.isNullOrUndefined(false)).toBe(false);
        });
    });

    describe('isString', () => {
        it('should return true for strings', () => {
            expect(Guards.isString('hello')).toBe(true);
            expect(Guards.isString('')).toBe(true);
        });

        it('should return false for non-strings', () => {
            expect(Guards.isString(123)).toBe(false);
            expect(Guards.isString(null)).toBe(false);
        });
    });

    describe('isEmpty', () => {
        it('should return true for empty strings', () => {
            expect(Guards.isEmpty('')).toBe(true);
        });

        it('should return true for empty arrays', () => {
            expect(Guards.isEmpty([])).toBe(true);
        });

        it('should return true for empty objects', () => {
            expect(Guards.isEmpty({})).toBe(true);
        });

        it('should return true for null/undefined', () => {
            expect(Guards.isEmpty(null)).toBe(true);
            expect(Guards.isEmpty(undefined)).toBe(true);
        });

        it('should return false for non-empty values', () => {
            expect(Guards.isEmpty('text')).toBe(false);
            expect(Guards.isEmpty([1])).toBe(false);
            expect(Guards.isEmpty({ key: 'value' })).toBe(false);
        });
    });
});