增加单元测试 date.test.js

lib/is/date.test.js

@@ -0,0 +1,19 @@
+import { it, expect, describe } from 'vitest';
+import yd_is_date from './date.js';
+
+describe('yd_is_date', () => {
+    it('should return true for Date objects', () => {
+        expect(yd_is_date(new Date())).toBe(true);
+    });
+
+    it('should return false for objects that are not Date', () => {
+        expect(yd_is_date({})).toBe(false);
+        expect(yd_is_date([])).toBe(false);
+        expect(yd_is_date('2024-01-01')).toBe(false); // string
+        expect(yd_is_date('2024-01-01T00:00:00Z')).toBe(false);
+        expect(yd_is_date(1)).toBe(false);
+        expect(yd_is_date(null)).toBe(false);
+        expect(yd_is_date(undefined)).toBe(false);
+        expect(yd_is_date(true)).toBe(false); // boolean
+    });
+});