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$server = $client->getRequest()->getServer();
        $this->assertSame('xyz', $server['HTTP_REFERER'], '->request() allows referer to be overridden');
    }

    public function testRequestHistory()
    {
        $client = $this->getBrowser();
        $client->request('GET', 'http://www.example.com/foo/foobar');
        $client->request('GET', 'bar');

        $this->assertSame('http://www.example.com/foo/bar', $client->getHistory()->current()->getUri(), '->request() updates the History');
        $this->assertSame('http://www.example.com/foo/foobar', $client->getHistory()->back()->getUri(), '->request() updates the History');
    }

    public function testRequestCookies()
    {
        $client = $this->getBrowser();
        $client->setNextResponse(new Response('<html><a href="/foo">foo</a></html>', 200, ['Set-Cookie' => 'foo=bar']));
        $client->request('GET', 'http://www.example.com/foo/foobar');
        $this->assertSame(['foo' => 'bar'], $client->getCookieJar()->allValues('http://www.example.com/foo/foobar'), '->request() updates the CookieJar');

        $client->request('GET', 'bar');
        $this->assertSame(['foo' => 'bar'], $client->getCookieJar()->allValues('http://www.example.com/foo/foobar'), '->request() updates the CookieJar');
    }

    public function testAdd()
    {
        $history = new History();
        $history->add(new Request('http://www.example1.com/', 'get'));
        $this->assertSame('http://www.example1.com/', $history->current()->getUri(), '->add() adds a request to the history');

        $history->add(new Request('http://www.example2.com/', 'get'));
        $this->assertSame('http://www.example2.com/', $history->current()->getUri(), '->add() adds a request to the history');

        $history->add(new Request('http://www.example3.com/', 'get'));
        $history->back();
        $history->add(new Request('http://www.example4.com/', 'get'));
        $this->assertSame('http://www.example4.com/', $history->current()->getUri(), '->add() adds a request to the history');

        $history->back();
        $this->assertSame('http://www.example2.com/', $history->current()->getUri(), '->add() adds a request to the history');
    }

    public function testClearIsEmpty()
    {
        $history = new History();
        $history->add(new Request('http://www.example.com/', 'get'));

        if (! $request instanceof IncomingRequest) {
            return;
        }

        $security = Services::security();

        try {
            $security->verify($request);
        } catch (SecurityException $e) {
            if ($security->shouldRedirect() && ! $request->isAJAX()) {
                return redirect()->back()->with('error', $e->getMessage());
            }

            throw $e;
        }
    }

    /** * We don't have anything to do here. * * @param array|null $arguments * * @return void */

// Check that the title and body fields are displayed with the correct values.     $this->assertSession()->fieldValueEquals('subject[0][value]', $edit['subject[0][value]']);
    $this->assertSession()->fieldValueEquals('comment_body[0][value]', $edit['comment_body[0][value]']);

    // Store the content of this page.     $this->submitForm([], 'Save');
    $this->assertSession()->pageTextContains('Your comment has been posted.');
    $this->assertSession()->elementsCount('xpath', '//section[contains(@class, "comments")]/article', 1);

    // Go back and re-submit the form.     $this->getSession()->getDriver()->back();
    $submit_button = $this->assertSession()->buttonExists('Save');
    $submit_button->click();
    $this->assertSession()->pageTextContains('Your comment has been posted.');
    $this->assertSession()->elementsCount('xpath', '//section[contains(@class, "comments")]/article', 2);
  }

  /** * Tests comment edit, preview, and save. */
  public function testCommentEditPreviewSave() {
    $web_user = $this->drupalCreateUser([

$crawler->addContent($content, $type);

        return $crawler;
    }

    /** * Goes back in the browser history. */
    public function back(): Crawler
    {
        do {
            $request = $this->history->back();
        } while (\array_key_exists(serialize($request), $this->redirects));

        return $this->requestFromRequest($request, false);
    }

    /** * Goes forward in the browser history. */
    public function forward(): Crawler
    {
        do {