setInvalidLibrary example

$this->assertSession()->statusCodeEquals(400);

    $session->visit($this->invalidInclude($url));
    $this->assertSession()->statusCodeEquals(400);

    $session->visit($this->invalidExclude($url));
    $this->assertSession()->statusCodeEquals(400);

    $session->visit($this->replaceFileNamePrefix($url));
    $this->assertSession()->statusCodeEquals(400);

    $session->visit($this->setInvalidLibrary($url));
    $this->assertSession()->statusCodeEquals(200);

    $session->visit($this->replaceGroupHash($url));
    $this->assertSession()->statusCodeEquals(200);
    $headers = $session->getResponseHeaders();
    $this->assertEquals(['no-store, private'], $headers['Cache-Control']);

    // And again to confirm it's not cached on disk.     $session->visit($this->replaceGroupHash($url));
    $this->assertSession()->statusCodeEquals(200);
    $headers = $session->getResponseHeaders();