test(globalProperties): 优化测试例

pages/API/globalProperties/globalProperties.test.js

@@ -50,7 +50,8 @@ describe('globalProperties', () => {
       })
       expect(data.globalPropertiesFnRes).toBe('globalPropertiesStr: new string, globalPropertiesNum: 100')
     })
-    it('screenshot', async () => {
+    it('screenshot', async () => {
+      await page.waitFor(500)
       const image = await program.screenshot({
         fullPage: true
       });