Selenium test code for browsing back and confirming that page is gone

selenium_browse_back.js

    elementIsVisible (element) {
        return this.driver.wait(until.elementIsVisible(element));
    }
    elementIsNotVisible (element) {
        return this.driver.wait(until.elementIsNotVisible(element));
    }


        const abbyElement = await findByText('Abby'); // Should show editor for new costume
        await elementIsVisible(abbyElement);
        await new Promise(resolve => setTimeout(resolve, 10000)); // Wait for scroll animation
        await driver.navigate().back();
        try {
            await elementIsVisible(abbyElement); // should throw StaleElementReferenceError
            throw 'ShouldNotGetHere'; // eslint-disable-line no-throw-literal
        } catch (e) {
            expect(e.constructor.name).toEqual('StaleElementReferenceError');
        }