Is there a way to close a tab in WebDriver or Protractor?

Is there a way to physically close a tab via Protractor or WebDriver?

I ask because while I know how to switch tabs programmatically, but it does not bring the active tab to the foreground. I can't always tell what is going on in my E2E tests that run on SauceLabs because when I view the screen casts it is showing the tab that I navigated away from, not the active one.

Am I going about this incorrectly?

it('should do something in the previous tab', function(done) {
    browser.getAllWindowHandles().then(function (handles) {
        browser.switchTo().window(handles[0]);
        // do something
        expect(something).toEqual(thisThing);
        done();
    });
});

You can try the following:

1. Switch to the new opened tab.
2. Close the current windows (in this case, the new tab).

3. Switch back to the first window.

   browser.getAllWindowHandles().then(function (handles) {
   browser.driver.switchTo().window(handles[1]);
   browser.driver.close();
   browser.driver.switchTo().window(handles[0]);
   });