class UserPasswordResetTest

class UserPasswordResetTest extends BrowserTestBase {
    use AssertMailTrait {
        getMails as drupalGetMails;
    }
    
    /**
     * The user object to test password resetting.
     *
     * @var \Drupal\user\UserInterface
     */
    protected $account;
    
    /**
     * Language manager object.
     *
     * @var \Drupal\Core\Language\LanguageManagerInterface
     */
    protected $languageManager;
    
    /**
     * {@inheritdoc}
     */
    protected static $modules = [
        'block',
        'language',
    ];
    
    /**
     * {@inheritdoc}
     */
    protected $defaultTheme = 'stark';
    
    /**
     * {@inheritdoc}
     */
    protected function setUp() : void {
        parent::setUp();
        // Enable page caching.
        $config = $this->config('system.performance');
        $config->set('cache.page.max_age', 3600);
        $config->save();
        $this->drupalPlaceBlock('system_menu_block:account');
        // Create a user.
        $account = $this->drupalCreateUser();
        // Activate user by logging in.
        $this->drupalLogin($account);
        $this->account = User::load($account->id());
        $this->account->passRaw = $account->passRaw;
        $this->drupalLogout();
        // Set the last login time that is used to generate the one-time link so
        // that it is definitely over a second ago.
        $account->login = \Drupal::time()->getRequestTime() - mt_rand(10, 100000);
        Database::getConnection()->update('users_field_data')
            ->fields([
            'login' => $account->getLastLoginTime(),
        ])
            ->condition('uid', $account->id())
            ->execute();
    }
    
    /**
     * Tests password reset functionality.
     */
    public function testUserPasswordReset() : void {
        // Verify that accessing the password reset form without having the session
        // variables set results in an access denied message.
        $this->drupalGet(Url::fromRoute('user.reset.form', [
            'uid' => $this->account
                ->id(),
        ]));
        $this->assertSession()
            ->statusCodeEquals(403);
        // Try to reset the password for a completely invalid username.
        $this->drupalGet('user/password');
        $long_name = $this->randomMachineName(UserInterface::USERNAME_MAX_LENGTH + 10);
        $edit = [
            'name' => $long_name,
        ];
        $this->submitForm($edit, 'Submit');
        $this->assertCount(0, $this->drupalGetMails([
            'id' => 'user_password_reset',
        ]), 'No email was sent when requesting a password for an invalid user name.');
        $this->assertSession()
            ->pageTextContains("The username or email address is invalid.");
        // Try to reset the password for an invalid account.
        $this->drupalGet('user/password');
        $random_name = $this->randomMachineName();
        $edit = [
            'name' => $random_name,
        ];
        $this->submitForm($edit, 'Submit');
        $this->assertNoValidPasswordReset($random_name);
        // Try to reset the password for a valid email address longer than
        // UserInterface::USERNAME_MAX_LENGTH (invalid username, valid email).
        // This should pass validation and print the generic message.
        $this->drupalGet('user/password');
        $long_name = $this->randomMachineName(UserInterface::USERNAME_MAX_LENGTH) . '@example.com';
        $edit = [
            'name' => $long_name,
        ];
        $this->submitForm($edit, 'Submit');
        $this->assertNoValidPasswordReset($long_name);
        // Reset the password by username via the password reset page.
        $this->drupalGet('user/password');
        $edit = [
            'name' => $this->account
                ->getAccountName(),
        ];
        $this->submitForm($edit, 'Submit');
        $this->assertValidPasswordReset($edit['name']);
        $resetURL = $this->getResetURL();
        $this->drupalGet($resetURL);
        // Ensure that the current URL does not contain the hash and timestamp.
        $this->assertSession()
            ->addressEquals(Url::fromRoute('user.reset.form', [
            'uid' => $this->account
                ->id(),
        ]));
        $this->assertSession()
            ->responseHeaderDoesNotExist('X-Drupal-Cache');
        // Ensure the password reset URL is not cached.
        $this->drupalGet($resetURL);
        $this->assertSession()
            ->responseHeaderDoesNotExist('X-Drupal-Cache');
        // Check the one-time login page.
        $this->assertSession()
            ->pageTextContains($this->account
            ->getAccountName());
        $this->assertSession()
            ->pageTextContains('This login can be used only once.');
        $this->assertSession()
            ->titleEquals('Reset password | Drupal');
        // Check successful login.
        $this->submitForm([], 'Log in');
        $this->assertSession()
            ->linkExists('Log out');
        $this->assertSession()
            ->titleEquals($this->account
            ->getAccountName() . ' | Drupal');
        // Change the forgotten password.
        $password = \Drupal::service('password_generator')->generate();
        $edit = [
            'pass[pass1]' => $password,
            'pass[pass2]' => $password,
        ];
        $this->submitForm($edit, 'Save');
        $this->assertSession()
            ->pageTextContains('The changes have been saved.');
        // Verify that the password reset session has been destroyed.
        $this->submitForm($edit, 'Save');
        $this->assertSession()
            ->pageTextContains("Your current password is missing or incorrect; it's required to change the Password.");
        // Log out, and try to log in again using the same one-time link.
        $this->drupalLogout();
        $this->drupalGet($resetURL);
        $this->assertSession()
            ->pageTextContains('You have tried to use a one-time login link that has either been used or is no longer valid. Request a new one using the form below.');
        $this->drupalGet($resetURL . '/login');
        $this->assertSession()
            ->pageTextContains('You have tried to use a one-time login link that has either been used or is no longer valid. Request a new one using the form below.');
        // Request a new password again, this time using the email address.
        // Count email messages before to compare with after.
        $before = count($this->drupalGetMails([
            'id' => 'user_password_reset',
        ]));
        $this->drupalGet('user/password');
        $edit = [
            'name' => $this->account
                ->getEmail(),
        ];
        $this->submitForm($edit, 'Submit');
        $this->assertValidPasswordReset($edit['name']);
        $this->assertCount($before + 1, $this->drupalGetMails([
            'id' => 'user_password_reset',
        ]), 'Email sent when requesting password reset using email address.');
        // Visit the user edit page without pass-reset-token and make sure it does
        // not cause an error.
        $resetURL = $this->getResetURL();
        $this->drupalGet($resetURL);
        $this->submitForm([], 'Log in');
        $this->drupalGet('user/' . $this->account
            ->id() . '/edit');
        $this->assertSession()
            ->pageTextNotContains('Expected user_string to be a string, NULL given');
        $this->drupalLogout();
        // Create a password reset link as if the request time was 60 seconds older than the allowed limit.
        $timeout = $this->config('user.settings')
            ->get('password_reset_timeout');
        $bogus_timestamp = \Drupal::time()->getRequestTime() - $timeout - 60;
        $_uid = $this->account
            ->id();
        $this->drupalGet("user/reset/{$_uid}/{$bogus_timestamp}/" . user_pass_rehash($this->account, $bogus_timestamp));
        $this->assertSession()
            ->pageTextContains('You have tried to use a one-time login link that has expired. Request a new one using the form below.');
        $this->drupalGet("user/reset/{$_uid}/{$bogus_timestamp}/" . user_pass_rehash($this->account, $bogus_timestamp) . '/login');
        $this->assertSession()
            ->pageTextContains('You have tried to use a one-time login link that has expired. Request a new one using the form below.');
        // Create a user, block the account, and verify that a login link is denied.
        $timestamp = \Drupal::time()->getRequestTime() - 1;
        $blocked_account = $this->drupalCreateUser()
            ->block();
        $blocked_account->save();
        $this->drupalGet("user/reset/" . $blocked_account->id() . "/{$timestamp}/" . user_pass_rehash($blocked_account, $timestamp));
        $this->assertSession()
            ->statusCodeEquals(403);
        $this->drupalGet("user/reset/" . $blocked_account->id() . "/{$timestamp}/" . user_pass_rehash($blocked_account, $timestamp) . '/login');
        $this->assertSession()
            ->statusCodeEquals(403);
        // Verify a blocked user can not request a new password.
        $this->drupalGet('user/password');
        // Count email messages before to compare with after.
        $before = count($this->drupalGetMails([
            'id' => 'user_password_reset',
        ]));
        $edit = [
            'name' => $blocked_account->getAccountName(),
        ];
        $this->submitForm($edit, 'Submit');
        $this->assertCount($before, $this->drupalGetMails([
            'id' => 'user_password_reset',
        ]), 'No email was sent when requesting password reset for a blocked account');
        // Verify a password reset link is invalidated when the user's email address changes.
        $this->drupalGet('user/password');
        $edit = [
            'name' => $this->account
                ->getAccountName(),
        ];
        $this->submitForm($edit, 'Submit');
        $old_email_reset_link = $this->getResetURL();
        $this->account
            ->setEmail("1" . $this->account
            ->getEmail());
        $this->account
            ->save();
        $this->drupalGet($old_email_reset_link);
        $this->assertSession()
            ->pageTextContains('You have tried to use a one-time login link that has either been used or is no longer valid. Request a new one using the form below.');
        $this->drupalGet($old_email_reset_link . '/login');
        $this->assertSession()
            ->pageTextContains('You have tried to use a one-time login link that has either been used or is no longer valid. Request a new one using the form below.');
        // Verify a password reset link will automatically log a user when /login is
        // appended.
        $this->drupalGet('user/password');
        $edit = [
            'name' => $this->account
                ->getAccountName(),
        ];
        $this->submitForm($edit, 'Submit');
        $reset_url = $this->getResetURL();
        $this->drupalGet($reset_url . '/login');
        $this->assertSession()
            ->linkExists('Log out');
        $this->assertSession()
            ->titleEquals($this->account
            ->getAccountName() . ' | Drupal');
        // Ensure blocked and deleted accounts can't access the user.reset.login
        // route.
        $this->drupalLogout();
        $timestamp = \Drupal::time()->getRequestTime() - 1;
        $blocked_account = $this->drupalCreateUser()
            ->block();
        $blocked_account->save();
        $this->drupalGet("user/reset/" . $blocked_account->id() . "/{$timestamp}/" . user_pass_rehash($blocked_account, $timestamp) . '/login');
        $this->assertSession()
            ->statusCodeEquals(403);
        $blocked_account->delete();
        $this->drupalGet("user/reset/" . $blocked_account->id() . "/{$timestamp}/" . user_pass_rehash($blocked_account, $timestamp) . '/login');
        $this->assertSession()
            ->statusCodeEquals(403);
    }
    
    /**
     * Tests password reset functionality when user has set preferred language.
     */
    public function testUserPasswordResetPreferredLanguage() : void {
        // Set two new languages.
        ConfigurableLanguage::createFromLangcode('fr')->save();
        ConfigurableLanguage::createFromLangcode('zh-hant')->save();
        $this->languageManager = \Drupal::languageManager();
        // Set language prefixes.
        $config = $this->config('language.negotiation');
        $config->set('url.prefixes', [
            'en' => '',
            'fr' => 'fr',
            'zh-hant' => 'zh',
        ])
            ->save();
        $this->rebuildContainer();
        foreach ($this->languagePrefixTestProvider() as $scenario) {
            [
                $setPreferredLangcode,
                $activeLangcode,
                $prefix,
                $visitingUrl,
                $expectedResetUrl,
                $unexpectedResetUrl,
            ] = array_values($scenario);
            $this->account->preferred_langcode = $setPreferredLangcode;
            $this->account
                ->save();
            $this->assertSame($setPreferredLangcode, $this->account
                ->getPreferredLangcode(FALSE));
            // Test Default langcode is different from active langcode when visiting different.
            if ($setPreferredLangcode !== 'en') {
                $this->drupalGet($prefix . '/user/password');
                $this->assertSame($activeLangcode, $this->getSession()
                    ->getResponseHeader('Content-language'));
                $this->assertSame('en', $this->languageManager
                    ->getDefaultLanguage()
                    ->getId());
            }
            // Test password reset with language prefixes.
            $this->drupalGet($visitingUrl);
            $edit = [
                'name' => $this->account
                    ->getAccountName(),
            ];
            $this->submitForm($edit, 'Submit');
            $this->assertValidPasswordReset($edit['name']);
            $resetURL = $this->getResetURL();
            $this->assertStringContainsString($expectedResetUrl, $resetURL);
            $this->assertStringNotContainsString($unexpectedResetUrl, $resetURL);
        }
    }
    
    /**
     * Provides scenarios for testUserPasswordResetPreferredLanguage().
     *
     * @return array
     */
    protected function languagePrefixTestProvider() {
        return [
            'Test language prefix set as \'\', visiting default with preferred language as en' => [
                'setPreferredLangcode' => 'en',
                'activeLangcode' => 'en',
                'prefix' => '',
                'visitingUrl' => 'user/password',
                'expectedResetUrl' => 'user/reset',
                'unexpectedResetUrl' => 'en/user/reset',
            ],
            'Test language prefix set as fr, visiting zh with preferred language as fr' => [
                'setPreferredLangcode' => 'fr',
                'activeLangcode' => 'fr',
                'prefix' => 'fr',
                'visitingUrl' => 'zh/user/password',
                'expectedResetUrl' => 'fr/user/reset',
                'unexpectedResetUrl' => 'zh/user/reset',
            ],
            'Test language prefix set as zh, visiting zh with preferred language as \'\'' => [
                'setPreferredLangcode' => '',
                'activeLangcode' => 'zh-hant',
                'prefix' => 'zh',
                'visitingUrl' => 'zh/user/password',
                'expectedResetUrl' => 'user/reset',
                'unexpectedResetUrl' => 'zh/user/reset',
            ],
        ];
    }
    
    /**
     * Retrieves password reset email and extracts the login link.
     */
    public function getResetURL() {
        // Assume the most recent email.
        $_emails = $this->drupalGetMails();
        $email = end($_emails);
        $urls = [];
        preg_match('#.+user/reset/.+#', $email['body'], $urls);
        return $urls[0];
    }
    
    /**
     * Tests user password reset while logged in.
     */
    public function testUserPasswordResetLoggedIn() : void {
        $another_account = $this->drupalCreateUser();
        $this->drupalLogin($another_account);
        $this->drupalGet('user/password');
        $this->submitForm([], 'Submit');
        // Click the reset URL while logged and change our password.
        $resetURL = $this->getResetURL();
        // Log in as a different user.
        $this->drupalLogin($this->account);
        $this->drupalGet($resetURL);
        $this->assertSession()
            ->pageTextContains("Another user ({$this->account->getAccountName()}) is already logged into the site on this computer, but you tried to use a one-time link for user {$another_account->getAccountName()}. Log out and try using the link again.");
        $this->assertSession()
            ->linkExists('Log out');
        $this->assertSession()
            ->linkByHrefExists(Url::fromRoute('user.logout')->toString());
        // Verify that the invalid password reset page does not show the user name.
        $attack_reset_url = "user/reset/" . $another_account->id() . "/1/1";
        $this->drupalGet($attack_reset_url);
        $this->assertSession()
            ->pageTextNotContains($another_account->getAccountName());
        $this->assertSession()
            ->addressEquals('user/' . $this->account
            ->id());
        $this->assertSession()
            ->pageTextContains('The one-time login link you clicked is invalid.');
        $another_account->delete();
        $this->drupalGet($resetURL);
        $this->assertSession()
            ->pageTextContains('The one-time login link you clicked is invalid.');
        // Log in.
        $this->drupalLogin($this->account);
        // Reset the password by username via the password reset page.
        $this->drupalGet('user/password');
        $this->submitForm([], 'Submit');
        // Click the reset URL while logged and change our password.
        $resetURL = $this->getResetURL();
        $this->drupalGet($resetURL);
        $this->submitForm([], 'Log in');
        // Change the password.
        $password = \Drupal::service('password_generator')->generate();
        $edit = [
            'pass[pass1]' => $password,
            'pass[pass2]' => $password,
        ];
        $this->submitForm($edit, 'Save');
        $this->assertSession()
            ->pageTextContains('The changes have been saved.');
        // Logged in users should not be able to access the user.reset.login or the
        // user.reset.form routes.
        $timestamp = \Drupal::time()->getRequestTime() - 1;
        $this->drupalGet("user/reset/" . $this->account
            ->id() . "/{$timestamp}/" . user_pass_rehash($this->account, $timestamp) . '/login');
        $this->assertSession()
            ->statusCodeEquals(403);
        $this->drupalGet("user/reset/" . $this->account
            ->id());
        $this->assertSession()
            ->statusCodeEquals(403);
    }
    
    /**
     * Tests the text box on incorrect login via link to password reset page.
     */
    public function testUserResetPasswordTextboxNotFilled() : void {
        $this->drupalGet('user/login');
        $edit = [
            'name' => $this->randomMachineName(),
            'pass' => $this->randomMachineName(),
        ];
        $this->drupalGet('user/login');
        $this->submitForm($edit, 'Log in');
        $this->assertSession()
            ->pageTextContains("Unrecognized username or password. Forgot your password?");
        $this->assertSession()
            ->linkExists("Forgot your password?");
        // Verify we don't pass the username as a query parameter.
        $this->assertSession()
            ->linkByHrefNotExists(Url::fromRoute('user.pass', [], [
            'query' => [
                'name' => $edit['name'],
            ],
        ])->toString());
        $this->assertSession()
            ->linkByHrefExists(Url::fromRoute('user.pass')->toString());
        unset($edit['pass']);
        // Verify the field is empty by default.
        $this->drupalGet('user/password');
        $this->assertSession()
            ->fieldValueEquals('name', '');
        // Ensure the name field value is not cached.
        $this->drupalGet('user/password', [
            'query' => [
                'name' => $edit['name'],
            ],
        ]);
        $this->assertSession()
            ->fieldValueEquals('name', $edit['name']);
        $this->drupalGet('user/password');
        $this->assertSession()
            ->fieldValueNotEquals('name', $edit['name']);
    }
    
    /**
     * Tests password reset flood control for one user.
     */
    public function testUserResetPasswordUserFloodControl() : void {
        \Drupal::configFactory()->getEditable('user.flood')
            ->set('user_limit', 3)
            ->save();
        $edit = [
            'name' => $this->account
                ->getAccountName(),
        ];
        // Count email messages before to compare with after.
        $before = count($this->drupalGetMails([
            'id' => 'user_password_reset',
        ]));
        // Try 3 requests that should not trigger flood control.
        for ($i = 0; $i < 3; $i++) {
            $this->drupalGet('user/password');
            $this->submitForm($edit, 'Submit');
            $this->assertValidPasswordReset($edit['name']);
        }
        // Ensure 3 emails were sent.
        $this->assertCount($before + 3, $this->drupalGetMails([
            'id' => 'user_password_reset',
        ]), '3 emails sent without triggering flood control.');
        // The next request should trigger flood control.
        $this->drupalGet('user/password');
        $this->submitForm($edit, 'Submit');
        // Ensure no further emails were sent.
        $this->assertCount($before + 3, $this->drupalGetMails([
            'id' => 'user_password_reset',
        ]), 'No further email was sent after triggering flood control.');
    }
    
    /**
     * Tests password reset flood control for one IP.
     */
    public function testUserResetPasswordIpFloodControl() : void {
        \Drupal::configFactory()->getEditable('user.flood')
            ->set('ip_limit', 3)
            ->save();
        // Try 3 requests that should not trigger flood control.
        for ($i = 0; $i < 3; $i++) {
            $this->drupalGet('user/password');
            $random_name = $this->randomMachineName();
            $edit = [
                'name' => $random_name,
            ];
            $this->submitForm($edit, 'Submit');
            // Because we're testing with a random name, the password reset will not be valid.
            $this->assertNoValidPasswordReset($random_name);
            $this->assertNoPasswordIpFlood();
        }
        // The next request should trigger flood control.
        $this->drupalGet('user/password');
        $edit = [
            'name' => $this->randomMachineName(),
        ];
        $this->submitForm($edit, 'Submit');
        $this->assertPasswordIpFlood();
    }
    
    /**
     * Tests user password reset flood control is cleared on successful reset.
     */
    public function testUserResetPasswordUserFloodControlIsCleared() : void {
        \Drupal::configFactory()->getEditable('user.flood')
            ->set('user_limit', 3)
            ->save();
        $edit = [
            'name' => $this->account
                ->getAccountName(),
        ];
        // Count email messages before to compare with after.
        $before = count($this->drupalGetMails([
            'id' => 'user_password_reset',
        ]));
        // Try 3 requests that should not trigger flood control.
        for ($i = 0; $i < 3; $i++) {
            $this->drupalGet('user/password');
            $this->submitForm($edit, 'Submit');
            $this->assertValidPasswordReset($edit['name']);
        }
        // Ensure 3 emails were sent.
        $this->assertCount($before + 3, $this->drupalGetMails([
            'id' => 'user_password_reset',
        ]), '3 emails sent without triggering flood control.');
        // Use the last password reset URL which was generated.
        $reset_url = $this->getResetURL();
        $this->drupalGet($reset_url . '/login');
        $this->assertSession()
            ->linkExists('Log out');
        $this->assertSession()
            ->titleEquals($this->account
            ->getAccountName() . ' | Drupal');
        $this->drupalLogout();
        // The next request should *not* trigger flood control, since a successful
        // password reset should have cleared flood events for this user.
        $this->drupalGet('user/password');
        $this->submitForm($edit, 'Submit');
        $this->assertValidPasswordReset($edit['name']);
        // Ensure another email was sent.
        $this->assertCount($before + 4, $this->drupalGetMails([
            'id' => 'user_password_reset',
        ]), 'Another email was sent after clearing flood control.');
    }
    
    /**
     * Tests user password reset flood control is cleared on admin reset.
     */
    public function testUserResetPasswordUserFloodControlAdmin() : void {
        $admin_user = $this->drupalCreateUser([
            'administer account settings',
            'administer users',
        ]);
        \Drupal::configFactory()->getEditable('user.flood')
            ->set('user_limit', 3)
            ->save();
        $edit = [
            'name' => $this->account
                ->getAccountName(),
            'pass' => 'wrong_password',
        ];
        // Try 3 requests that should not trigger flood control.
        for ($i = 0; $i < 3; $i++) {
            $this->drupalGet('user/login');
            $this->submitForm($edit, 'Log in');
            $this->assertSession()
                ->pageTextNotContains('There have been more than 3 failed login attempts for this account. It is temporarily blocked.');
        }
        $this->drupalGet('user/login');
        $this->submitForm($edit, 'Log in');
        $this->assertSession()
            ->pageTextContains('There have been more than 3 failed login attempts for this account. It is temporarily blocked.');
        $password = $this->randomMachineName();
        $edit = [
            'pass[pass1]' => $password,
            'pass[pass2]' => $password,
        ];
        // Log in as admin and change the user password.
        $this->drupalLogin($admin_user);
        $this->drupalGet('user/' . $this->account
            ->id() . '/edit');
        $this->submitForm($edit, 'Save');
        $this->drupalLogout();
        $edit = [
            'name' => $this->account
                ->getAccountName(),
            'pass' => $password,
        ];
        // The next request should *not* trigger flood control, since the
        // password change should have cleared flood events for this user.
        $this->account->passRaw = $password;
        $this->drupalLogin($this->account);
        $this->assertSession()
            ->pageTextNotContains('There have been more than 3 failed login attempts for this account. It is temporarily blocked.');
    }
    
    /**
     * Helper function to make assertions about a valid password reset.
     *
     * @internal
     */
    public function assertValidPasswordReset(string $name) : void {
        $this->assertSession()
            ->pageTextContains("If {$name} is a valid account, an email will be sent with instructions to reset your password.");
        $this->assertMail('to', $this->account
            ->getEmail(), 'Password email sent to user.');
        $subject = 'Replacement login information for ' . $this->account
            ->getAccountName() . ' at Drupal';
        $this->assertMail('subject', $subject, 'Password reset email subject is correct.');
    }
    
    /**
     * Helper function to make assertions about an invalid password reset.
     *
     * @param string $name
     *   The user name.
     *
     * @internal
     */
    public function assertNoValidPasswordReset(string $name) : void {
        // This message is the same as the valid reset for privacy reasons.
        $this->assertSession()
            ->pageTextContains("If {$name} is a valid account, an email will be sent with instructions to reset your password.");
        // The difference is that no email is sent.
        $this->assertCount(0, $this->drupalGetMails([
            'id' => 'user_password_reset',
        ]), 'No email was sent when requesting a password for an invalid account.');
    }
    
    /**
     * Makes assertions about a password reset triggering IP flood control.
     *
     * @internal
     */
    public function assertPasswordIpFlood() : void {
        $this->assertSession()
            ->pageTextContains('Too many password recovery requests from your IP address. It is temporarily blocked. Try again later or contact the site administrator.');
    }
    
    /**
     * Makes assertions about a password reset not triggering IP flood control.
     *
     * @internal
     */
    public function assertNoPasswordIpFlood() : void {
        $this->assertSession()
            ->pageTextNotContains('Too many password recovery requests from your IP address. It is temporarily blocked. Try again later or contact the site administrator.');
    }
    
    /**
     * Make sure that users cannot forge password reset URLs of other users.
     */
    public function testResetImpersonation() : void {
        // Create two identical user accounts except for the user name. They must
        // have the same empty password, so we can't use $this->drupalCreateUser().
        $edit = [];
        $edit['name'] = $this->randomMachineName();
        $edit['mail'] = $edit['name'] . '@example.com';
        $edit['status'] = 1;
        $user1 = User::create($edit);
        $user1->save();
        $edit['name'] = $this->randomMachineName();
        $user2 = User::create($edit);
        $user2->save();
        // Unique password hashes are automatically generated, the only way to
        // change that is to update it directly in the database.
        Database::getConnection()->update('users_field_data')
            ->fields([
            'pass' => NULL,
        ])
            ->condition('uid', [
            $user1->id(),
            $user2->id(),
        ], 'IN')
            ->execute();
        \Drupal::entityTypeManager()->getStorage('user')
            ->resetCache();
        $user1 = User::load($user1->id());
        $user2 = User::load($user2->id());
        $this->assertEquals($user2->getPassword(), $user1->getPassword(), 'Both users have the same password hash.');
        // The password reset URL must not be valid for the second user when only
        // the user ID is changed in the URL.
        $reset_url = user_pass_reset_url($user1);
        $attack_reset_url = str_replace("user/reset/{$user1->id()}", "user/reset/{$user2->id()}", $reset_url);
        $this->drupalGet($attack_reset_url);
        // Verify that the invalid password reset page does not show the user name.
        $this->assertSession()
            ->pageTextNotContains($user2->getAccountName());
        $this->assertSession()
            ->addressEquals('user/password');
        $this->assertSession()
            ->pageTextContains('You have tried to use a one-time login link that has either been used or is no longer valid. Request a new one using the form below.');
        $this->drupalGet($attack_reset_url . '/login');
        // Verify that the invalid password reset page does not show the user name.
        $this->assertSession()
            ->pageTextNotContains($user2->getAccountName());
        $this->assertSession()
            ->addressEquals('user/password');
        $this->assertSession()
            ->pageTextContains('You have tried to use a one-time login link that has either been used or is no longer valid. Request a new one using the form below.');
    }
    
    /**
     * Test the autocomplete attribute is present.
     */
    public function testResetFormHasAutocompleteAttribute() : void {
        $this->drupalGet('user/password');
        $field = $this->getSession()
            ->getPage()
            ->findField('name');
        $this->assertEquals('username', $field->getAttribute('autocomplete'));
    }

}