test: fix expect in jshandle spec (#927)

Author: Meir017

test/jshandle.spec.js

@@ -160,7 +160,7 @@ module.exports.describe = function({testRunner, expect, CHROMIUM, FFOX, WEBKIT})
       const aHandle = await page.evaluateHandle(() => document.querySelector('div').firstChild);
       const element = aHandle.asElement();
       expect(element).toBeTruthy();
-      expect(await page.evaluate(e => e.nodeType === HTMLElement.TEXT_NODE, element));
+      expect(await page.evaluate(e => e.nodeType === HTMLElement.TEXT_NODE, element)).toBeTruthy();
     });
     it('should work with nullified Node', async({page, server}) => {
       await page.setContent('<section>test</section>');