first commit

tests/_bootstrap.php

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+<?php
+define('YII_ENV', 'test');
+defined('YII_DEBUG') or define('YII_DEBUG', true);
+
+require_once __DIR__ . '/../vendor/yiisoft/yii2/Yii.php';
+require __DIR__ .'/../vendor/autoload.php';

tests/_data/.gitkeep

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+

tests/_output/.gitignore

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+*
+!.gitignore

tests/_support/AcceptanceTester.php

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+<?php
+
+
+/**
+ * Inherited Methods
+ * @method void wantToTest($text)
+ * @method void wantTo($text)
+ * @method void execute($callable)
+ * @method void expectTo($prediction)
+ * @method void expect($prediction)
+ * @method void amGoingTo($argumentation)
+ * @method void am($role)
+ * @method void lookForwardTo($achieveValue)
+ * @method void comment($description)
+ * @method \Codeception\Lib\Friend haveFriend($name, $actorClass = NULL)
+ *
+ * @SuppressWarnings(PHPMD)
+*/
+class AcceptanceTester extends \Codeception\Actor
+{
+    use _generated\AcceptanceTesterActions;
+
+   /**
+    * Define custom actions here
+    */
+}

tests/_support/FunctionalTester.php

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+<?php
+
+
+/**
+ * Inherited Methods
+ * @method void wantToTest($text)
+ * @method void wantTo($text)
+ * @method void execute($callable)
+ * @method void expectTo($prediction)
+ * @method void expect($prediction)
+ * @method void amGoingTo($argumentation)
+ * @method void am($role)
+ * @method void lookForwardTo($achieveValue)
+ * @method void comment($description)
+ * @method \Codeception\Lib\Friend haveFriend($name, $actorClass = NULL)
+ *
+ * @SuppressWarnings(PHPMD)
+*/
+class FunctionalTester extends \Codeception\Actor
+{
+    use _generated\FunctionalTesterActions;
+
+}

tests/_support/UnitTester.php

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+<?php
+
+
+/**
+ * Inherited Methods
+ * @method void wantToTest($text)
+ * @method void wantTo($text)
+ * @method void execute($callable)
+ * @method void expectTo($prediction)
+ * @method void expect($prediction)
+ * @method void amGoingTo($argumentation)
+ * @method void am($role)
+ * @method void lookForwardTo($achieveValue)
+ * @method void comment($description)
+ * @method \Codeception\Lib\Friend haveFriend($name, $actorClass = NULL)
+ *
+ * @SuppressWarnings(PHPMD)
+*/
+class UnitTester extends \Codeception\Actor
+{
+    use _generated\UnitTesterActions;
+
+   /**
+    * Define custom actions here
+    */
+}

tests/acceptance.suite.yml.example

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+actor: AcceptanceTester
+modules:
+    enabled:
+        - WebDriver:
+            url: http://127.0.0.1:8080/
+            browser: firefox
+        - Yii2:
+            part: orm
+            entryScript: index-test.php
+            cleanup: false

tests/acceptance/AboutCest.php

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+<?php
+
+use yii\helpers\Url;
+
+class AboutCest
+{
+    public function ensureThatAboutWorks(AcceptanceTester $I)
+    {
+        $I->amOnPage(Url::toRoute('/site/about'));
+        $I->see('About', 'h1');
+    }
+}

tests/acceptance/ContactCest.php

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+<?php
+
+use yii\helpers\Url;
+
+class ContactCest
+{
+    public function _before(\AcceptanceTester $I)
+    {
+        $I->amOnPage(Url::toRoute('/site/contact'));
+    }
+    
+    public function contactPageWorks(AcceptanceTester $I)
+    {
+        $I->wantTo('ensure that contact page works');
+        $I->see('Contact', 'h1');
+    }
+
+    public function contactFormCanBeSubmitted(AcceptanceTester $I)
+    {
+        $I->amGoingTo('submit contact form with correct data');
+        $I->fillField('#contactform-name', 'tester');
+        $I->fillField('#contactform-email', 'tester@example.com');
+        $I->fillField('#contactform-subject', 'test subject');
+        $I->fillField('#contactform-body', 'test content');
+        $I->fillField('#contactform-verifycode', 'testme');
+
+        $I->click('contact-button');
+        
+        $I->wait(2); // wait for button to be clicked
+
+        $I->dontSeeElement('#contact-form');
+        $I->see('Thank you for contacting us. We will respond to you as soon as possible.');
+    }
+}

tests/acceptance/HomeCest.php

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+<?php
+
+use yii\helpers\Url;
+
+class HomeCest
+{
+    public function ensureThatHomePageWorks(AcceptanceTester $I)
+    {
+        $I->amOnPage(Url::toRoute('/site/index'));        
+        $I->see('My Company');
+        
+        $I->seeLink('About');
+        $I->click('About');
+        $I->wait(2); // wait for page to be opened
+        
+        $I->see('This is the About page.');
+    }
+}

tests/acceptance/LoginCest.php

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+<?php
+
+use yii\helpers\Url;
+
+class LoginCest
+{
+    public function ensureThatLoginWorks(AcceptanceTester $I)
+    {
+        $I->amOnPage(Url::toRoute('/site/login'));
+        $I->see('Login', 'h1');
+
+        $I->amGoingTo('try to login with correct credentials');
+        $I->fillField('input[name="LoginForm[username]"]', 'admin');
+        $I->fillField('input[name="LoginForm[password]"]', 'admin');
+        $I->click('login-button');
+        $I->wait(2); // wait for button to be clicked
+
+        $I->expectTo('see user info');
+        $I->see('Logout');
+    }
+}

tests/acceptance/_bootstrap.php

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+<?php

tests/bin/yii

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+#!/usr/bin/env php
+<?php
+/**
+ * Yii console bootstrap file.
+ *
+ * @link https://www.yiiframework.com/
+ * @copyright Copyright (c) 2008 Yii Software LLC
+ * @license https://www.yiiframework.com/license/
+ */
+
+defined('YII_DEBUG') or define('YII_DEBUG', true);
+defined('YII_ENV') or define('YII_ENV', 'test');
+
+require __DIR__ . '/../../vendor/autoload.php';
+require __DIR__ . '/../../vendor/yiisoft/yii2/Yii.php';
+
+$config = yii\helpers\ArrayHelper::merge(
+    require __DIR__ . '/../../config/console.php',
+    [
+        'components' => [
+            'db' => require __DIR__ . '/../../config/test_db.php'
+        ]
+    ]
+);
+
+
+$application = new yii\console\Application($config);
+$exitCode = $application->run();
+exit($exitCode);

tests/bin/yii.bat

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+@echo off
+
+rem -------------------------------------------------------------
+rem  Yii command line bootstrap script for Windows.
+rem
+rem  @author Qiang Xue <qiang.xue@gmail.com>
+rem  @link https://www.yiiframework.com/
+rem  @copyright Copyright (c) 2008 Yii Software LLC
+rem  @license https://www.yiiframework.com/license/
+rem -------------------------------------------------------------
+
+@setlocal
+
+set YII_PATH=%~dp0
+
+if "%PHP_COMMAND%" == "" set PHP_COMMAND=php.exe
+
+"%PHP_COMMAND%" "%YII_PATH%yii" %*
+
+@endlocal

tests/functional.suite.yml

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+# Codeception Test Suite Configuration
+
+# suite for functional (integration) tests.
+# emulate web requests and make application process them.
+# (tip: better to use with frameworks).
+
+# RUN `build` COMMAND AFTER ADDING/REMOVING MODULES.
+#basic/web/index.php
+actor: FunctionalTester
+modules:
+    enabled:
+      - Filesystem
+      - Yii2
+      - Asserts

tests/functional/ContactFormCest.php

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+<?php
+
+class ContactFormCest 
+{
+    public function _before(\FunctionalTester $I)
+    {
+        $I->amOnRoute('site/contact');
+    }
+
+    public function openContactPage(\FunctionalTester $I)
+    {
+        $I->see('Contact', 'h1');        
+    }
+
+    public function submitEmptyForm(\FunctionalTester $I)
+    {
+        $I->submitForm('#contact-form', []);
+        $I->expectTo('see validations errors');
+        $I->see('Contact', 'h1');
+        $I->see('Name cannot be blank');
+        $I->see('Email cannot be blank');
+        $I->see('Subject cannot be blank');
+        $I->see('Body cannot be blank');
+        $I->see('The verification code is incorrect');
+    }
+
+    public function submitFormWithIncorrectEmail(\FunctionalTester $I)
+    {
+        $I->submitForm('#contact-form', [
+            'ContactForm[name]' => 'tester',
+            'ContactForm[email]' => 'tester.email',
+            'ContactForm[subject]' => 'test subject',
+            'ContactForm[body]' => 'test content',
+            'ContactForm[verifyCode]' => 'testme',
+        ]);
+        $I->expectTo('see that email address is wrong');
+        $I->dontSee('Name cannot be blank', '.help-inline');
+        $I->see('Email is not a valid email address.');
+        $I->dontSee('Subject cannot be blank', '.help-inline');
+        $I->dontSee('Body cannot be blank', '.help-inline');
+        $I->dontSee('The verification code is incorrect', '.help-inline');        
+    }
+
+    public function submitFormSuccessfully(\FunctionalTester $I)
+    {
+        $I->submitForm('#contact-form', [
+            'ContactForm[name]' => 'tester',
+            'ContactForm[email]' => 'tester@example.com',
+            'ContactForm[subject]' => 'test subject',
+            'ContactForm[body]' => 'test content',
+            'ContactForm[verifyCode]' => 'testme',
+        ]);
+        $I->seeEmailIsSent();
+        $I->dontSeeElement('#contact-form');
+        $I->see('Thank you for contacting us. We will respond to you as soon as possible.');        
+    }
+}

tests/functional/LoginFormCest.php

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+<?php
+
+class LoginFormCest
+{
+    public function _before(\FunctionalTester $I)
+    {
+        $I->amOnRoute('site/login');
+    }
+
+    public function openLoginPage(\FunctionalTester $I)
+    {
+        $I->see('Login', 'h1');
+
+    }
+
+    // demonstrates `amLoggedInAs` method
+    public function internalLoginById(\FunctionalTester $I)
+    {
+        $I->amLoggedInAs(100);
+        $I->amOnPage('/');
+        $I->see('Logout (admin)');
+    }
+
+    // demonstrates `amLoggedInAs` method
+    public function internalLoginByInstance(\FunctionalTester $I)
+    {
+        $I->amLoggedInAs(\app\models\User::findByUsername('admin'));
+        $I->amOnPage('/');
+        $I->see('Logout (admin)');
+    }
+
+    public function loginWithEmptyCredentials(\FunctionalTester $I)
+    {
+        $I->submitForm('#login-form', []);
+        $I->expectTo('see validations errors');
+        $I->see('Username cannot be blank.');
+        $I->see('Password cannot be blank.');
+    }
+
+    public function loginWithWrongCredentials(\FunctionalTester $I)
+    {
+        $I->submitForm('#login-form', [
+            'LoginForm[username]' => 'admin',
+            'LoginForm[password]' => 'wrong',
+        ]);
+        $I->expectTo('see validations errors');
+        $I->see('Incorrect username or password.');
+    }
+
+    public function loginSuccessfully(\FunctionalTester $I)
+    {
+        $I->submitForm('#login-form', [
+            'LoginForm[username]' => 'admin',
+            'LoginForm[password]' => 'admin',
+        ]);
+        $I->see('Logout (admin)');
+        $I->dontSeeElement('form#login-form');              
+    }
+}

tests/functional/_bootstrap.php

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+<?php

tests/unit.suite.yml

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+# Codeception Test Suite Configuration
+
+# suite for unit (internal) tests.
+# RUN `build` COMMAND AFTER ADDING/REMOVING MODULES.
+
+actor: UnitTester
+modules:
+    enabled:
+      - Asserts
+      - Yii2:
+            part: [orm, email, fixtures]

tests/unit/_bootstrap.php

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+<?php
+
+// add unit testing specific bootstrap code here

tests/unit/models/ContactFormTest.php

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+<?php
+
+namespace tests\unit\models;
+
+use app\models\ContactForm;
+use yii\mail\MessageInterface;
+
+class ContactFormTest extends \Codeception\Test\Unit
+{
+    /**
+     * @var \UnitTester
+     */
+    public $tester;
+
+    public function testEmailIsSentOnContact()
+    {
+        $model = new ContactForm();
+
+        $model->attributes = [
+            'name' => 'Tester',
+            'email' => 'tester@example.com',
+            'subject' => 'very important letter subject',
+            'body' => 'body of current message',
+            'verifyCode' => 'testme',
+        ];
+
+        verify($model->contact('admin@example.com'))->notEmpty();
+
+        // using Yii2 module actions to check email was sent
+        $this->tester->seeEmailIsSent();
+
+        /** @var MessageInterface $emailMessage */
+        $emailMessage = $this->tester->grabLastSentEmail();
+        verify($emailMessage)->instanceOf('yii\mail\MessageInterface');
+        verify($emailMessage->getTo())->arrayHasKey('admin@example.com');
+        verify($emailMessage->getFrom())->arrayHasKey('noreply@example.com');
+        verify($emailMessage->getReplyTo())->arrayHasKey('tester@example.com');
+        verify($emailMessage->getSubject())->equals('very important letter subject');
+        verify($emailMessage->toString())->stringContainsString('body of current message');
+    }
+}

tests/unit/models/LoginFormTest.php

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+<?php
+
+namespace tests\unit\models;
+
+use app\models\LoginForm;
+
+class LoginFormTest extends \Codeception\Test\Unit
+{
+    private $model;
+
+    protected function _after()
+    {
+        \Yii::$app->user->logout();
+    }
+
+    public function testLoginNoUser()
+    {
+        $this->model = new LoginForm([
+            'username' => 'not_existing_username',
+            'password' => 'not_existing_password',
+        ]);
+
+        verify($this->model->login())->false();
+        verify(\Yii::$app->user->isGuest)->true();
+    }
+
+    public function testLoginWrongPassword()
+    {
+        $this->model = new LoginForm([
+            'username' => 'demo',
+            'password' => 'wrong_password',
+        ]);
+
+        verify($this->model->login())->false();
+        verify(\Yii::$app->user->isGuest)->true();
+        verify($this->model->errors)->arrayHasKey('password');
+    }
+
+    public function testLoginCorrect()
+    {
+        $this->model = new LoginForm([
+            'username' => 'demo',
+            'password' => 'demo',
+        ]);
+
+        verify($this->model->login())->true();
+        verify(\Yii::$app->user->isGuest)->false();
+        verify($this->model->errors)->arrayHasNotKey('password');
+    }
+
+}

tests/unit/models/UserTest.php

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+<?php
+
+namespace tests\unit\models;
+
+use app\models\User;
+
+class UserTest extends \Codeception\Test\Unit
+{
+    public function testFindUserById()
+    {
+        verify($user = User::findIdentity(100))->notEmpty();
+        verify($user->username)->equals('admin');
+
+        verify(User::findIdentity(999))->empty();
+    }
+
+    public function testFindUserByAccessToken()
+    {
+        verify($user = User::findIdentityByAccessToken('100-token'))->notEmpty();
+        verify($user->username)->equals('admin');
+
+        verify(User::findIdentityByAccessToken('non-existing'))->empty();        
+    }
+
+    public function testFindUserByUsername()
+    {
+        verify($user = User::findByUsername('admin'))->notEmpty();
+        verify(User::findByUsername('not-admin'))->empty();
+    }
+
+    /**
+     * @depends testFindUserByUsername
+     */
+    public function testValidateUser()
+    {
+        $user = User::findByUsername('admin');
+        verify($user->validateAuthKey('test100key'))->notEmpty();
+        verify($user->validateAuthKey('test102key'))->empty();
+
+        verify($user->validatePassword('admin'))->notEmpty();
+        verify($user->validatePassword('123456'))->empty();        
+    }
+
+}

tests/unit/widgets/AlertTest.php

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+<?php
+
+namespace tests\unit\widgets;
+
+use app\widgets\Alert;
+use Yii;
+
+class AlertTest extends \Codeception\Test\Unit
+{
+    public function testSingleErrorMessage()
+    {
+        $message = 'This is an error message';
+
+        Yii::$app->session->setFlash('error', $message);
+
+        $renderingResult = Alert::widget();
+
+        verify($renderingResult)->stringContainsString($message);
+        verify($renderingResult)->stringContainsString('alert-danger');
+
+        verify($renderingResult)->stringNotContainsString('alert-success');
+        verify($renderingResult)->stringNotContainsString('alert-info');
+        verify($renderingResult)->stringNotContainsString('alert-warning');
+    }
+
+    public function testMultipleErrorMessages()
+    {
+        $firstMessage = 'This is the first error message';
+        $secondMessage = 'This is the second error message';
+
+        Yii::$app->session->setFlash('error', [$firstMessage, $secondMessage]);
+
+        $renderingResult = Alert::widget();
+
+        verify($renderingResult)->stringContainsString($firstMessage);
+        verify($renderingResult)->stringContainsString($secondMessage);
+        verify($renderingResult)->stringContainsString('alert-danger');
+
+        verify($renderingResult)->stringNotContainsString('alert-success');
+        verify($renderingResult)->stringNotContainsString('alert-info');
+        verify($renderingResult)->stringNotContainsString('alert-warning');
+    }
+
+    public function testSingleDangerMessage()
+    {
+        $message = 'This is a danger message';
+
+        Yii::$app->session->setFlash('danger', $message);
+
+        $renderingResult = Alert::widget();
+
+        verify($renderingResult)->stringContainsString($message);
+        verify($renderingResult)->stringContainsString('alert-danger');
+
+        verify($renderingResult)->stringNotContainsString('alert-success');
+        verify($renderingResult)->stringNotContainsString('alert-info');
+        verify($renderingResult)->stringNotContainsString('alert-warning');
+    }
+
+    public function testMultipleDangerMessages()
+    {
+        $firstMessage = 'This is the first danger message';
+        $secondMessage = 'This is the second danger message';
+
+        Yii::$app->session->setFlash('danger', [$firstMessage, $secondMessage]);
+
+        $renderingResult = Alert::widget();
+
+        verify($renderingResult)->stringContainsString($firstMessage);
+        verify($renderingResult)->stringContainsString($secondMessage);
+        verify($renderingResult)->stringContainsString('alert-danger');
+
+        verify($renderingResult)->stringNotContainsString('alert-success');
+        verify($renderingResult)->stringNotContainsString('alert-info');
+        verify($renderingResult)->stringNotContainsString('alert-warning');
+    }
+
+    public function testSingleSuccessMessage()
+    {
+        $message = 'This is a success message';
+
+        Yii::$app->session->setFlash('success', $message);
+
+        $renderingResult = Alert::widget();
+
+        verify($renderingResult)->stringContainsString($message);
+        verify($renderingResult)->stringContainsString('alert-success');
+
+        verify($renderingResult)->stringNotContainsString('alert-danger');
+        verify($renderingResult)->stringNotContainsString('alert-info');
+        verify($renderingResult)->stringNotContainsString('alert-warning');
+    }
+
+    public function testMultipleSuccessMessages()
+    {
+        $firstMessage = 'This is the first danger message';
+        $secondMessage = 'This is the second danger message';
+
+        Yii::$app->session->setFlash('success', [$firstMessage, $secondMessage]);
+
+        $renderingResult = Alert::widget();
+
+        verify($renderingResult)->stringContainsString($firstMessage);
+        verify($renderingResult)->stringContainsString($secondMessage);
+        verify($renderingResult)->stringContainsString('alert-success');
+
+        verify($renderingResult)->stringNotContainsString('alert-danger');
+        verify($renderingResult)->stringNotContainsString('alert-info');
+        verify($renderingResult)->stringNotContainsString('alert-warning');
+    }
+
+    public function testSingleInfoMessage()
+    {
+        $message = 'This is an info message';
+
+        Yii::$app->session->setFlash('info', $message);
+
+        $renderingResult = Alert::widget();
+
+        verify($renderingResult)->stringContainsString($message);
+        verify($renderingResult)->stringContainsString('alert-info');
+
+        verify($renderingResult)->stringNotContainsString('alert-danger');
+        verify($renderingResult)->stringNotContainsString('alert-success');
+        verify($renderingResult)->stringNotContainsString('alert-warning');
+    }
+
+    public function testMultipleInfoMessages()
+    {
+        $firstMessage = 'This is the first info message';
+        $secondMessage = 'This is the second info message';
+
+        Yii::$app->session->setFlash('info', [$firstMessage, $secondMessage]);
+
+        $renderingResult = Alert::widget();
+
+        verify($renderingResult)->stringContainsString($firstMessage);
+        verify($renderingResult)->stringContainsString($secondMessage);
+        verify($renderingResult)->stringContainsString('alert-info');
+
+        verify($renderingResult)->stringNotContainsString('alert-danger');
+        verify($renderingResult)->stringNotContainsString('alert-success');
+        verify($renderingResult)->stringNotContainsString('alert-warning');
+    }
+
+    public function testSingleWarningMessage()
+    {
+        $message = 'This is a warning message';
+
+        Yii::$app->session->setFlash('warning', $message);
+
+        $renderingResult = Alert::widget();
+
+        verify($renderingResult)->stringContainsString($message);
+        verify($renderingResult)->stringContainsString('alert-warning');
+
+        verify($renderingResult)->stringNotContainsString('alert-danger');
+        verify($renderingResult)->stringNotContainsString('alert-success');
+        verify($renderingResult)->stringNotContainsString('alert-info');
+    }
+
+    public function testMultipleWarningMessages()
+    {
+        $firstMessage = 'This is the first warning message';
+        $secondMessage = 'This is the second warning message';
+
+        Yii::$app->session->setFlash('warning', [$firstMessage, $secondMessage]);
+
+        $renderingResult = Alert::widget();
+
+        verify($renderingResult)->stringContainsString($firstMessage);
+        verify($renderingResult)->stringContainsString($secondMessage);
+        verify($renderingResult)->stringContainsString('alert-warning');
+
+        verify($renderingResult)->stringNotContainsString('alert-danger');
+        verify($renderingResult)->stringNotContainsString('alert-success');
+        verify($renderingResult)->stringNotContainsString('alert-info');
+    }
+
+    public function testSingleMixedMessages() {
+        $errorMessage = 'This is an error message';
+        $dangerMessage = 'This is a danger message';
+        $successMessage = 'This is a success message';
+        $infoMessage = 'This is a info message';
+        $warningMessage = 'This is a warning message';
+
+        Yii::$app->session->setFlash('error', $errorMessage);
+        Yii::$app->session->setFlash('danger', $dangerMessage);
+        Yii::$app->session->setFlash('success', $successMessage);
+        Yii::$app->session->setFlash('info', $infoMessage);
+        Yii::$app->session->setFlash('warning', $warningMessage);
+
+        $renderingResult = Alert::widget();
+
+        verify($renderingResult)->stringContainsString($errorMessage);
+        verify($renderingResult)->stringContainsString($dangerMessage);
+        verify($renderingResult)->stringContainsString($successMessage);
+        verify($renderingResult)->stringContainsString($infoMessage);
+        verify($renderingResult)->stringContainsString($warningMessage);
+
+        verify($renderingResult)->stringContainsString('alert-danger');
+        verify($renderingResult)->stringContainsString('alert-success');
+        verify($renderingResult)->stringContainsString('alert-info');
+        verify($renderingResult)->stringContainsString('alert-warning');
+    }
+
+    public function testMultipleMixedMessages() {
+        $firstErrorMessage = 'This is the first error message';
+        $secondErrorMessage = 'This is the second error message';
+        $firstDangerMessage = 'This is the first danger message';
+        $secondDangerMessage = 'This is the second';
+        $firstSuccessMessage = 'This is the first success message';
+        $secondSuccessMessage = 'This is the second success message';
+        $firstInfoMessage = 'This is the first info message';
+        $secondInfoMessage = 'This is the second info message';
+        $firstWarningMessage = 'This is the first warning message';
+        $secondWarningMessage = 'This is the second warning message';
+
+        Yii::$app->session->setFlash('error', [$firstErrorMessage, $secondErrorMessage]);
+        Yii::$app->session->setFlash('danger', [$firstDangerMessage, $secondDangerMessage]);
+        Yii::$app->session->setFlash('success', [$firstSuccessMessage, $secondSuccessMessage]);
+        Yii::$app->session->setFlash('info', [$firstInfoMessage, $secondInfoMessage]);
+        Yii::$app->session->setFlash('warning', [$firstWarningMessage, $secondWarningMessage]);
+
+        $renderingResult = Alert::widget();
+
+        verify($renderingResult)->stringContainsString($firstErrorMessage);
+        verify($renderingResult)->stringContainsString($secondErrorMessage);
+        verify($renderingResult)->stringContainsString($firstDangerMessage);
+        verify($renderingResult)->stringContainsString($secondDangerMessage);
+        verify($renderingResult)->stringContainsString($firstSuccessMessage);
+        verify($renderingResult)->stringContainsString($secondSuccessMessage);
+        verify($renderingResult)->stringContainsString($firstInfoMessage);
+        verify($renderingResult)->stringContainsString($secondInfoMessage);
+        verify($renderingResult)->stringContainsString($firstWarningMessage);
+        verify($renderingResult)->stringContainsString($secondWarningMessage);
+
+        verify($renderingResult)->stringContainsString('alert-danger');
+        verify($renderingResult)->stringContainsString('alert-success');
+        verify($renderingResult)->stringContainsString('alert-info');
+        verify($renderingResult)->stringContainsString('alert-warning');
+    }
+
+    public function testFlashIntegrity()
+    {
+        $errorMessage = 'This is an error message';
+        $unrelatedMessage = 'This is a message that is not related to the alert widget';
+
+        Yii::$app->session->setFlash('error', $errorMessage);
+        Yii::$app->session->setFlash('unrelated', $unrelatedMessage);
+
+        Alert::widget();
+
+        // Simulate redirect
+        Yii::$app->session->close();
+        Yii::$app->session->open();
+
+        verify(Yii::$app->session->getFlash('error'))->empty();
+        verify(Yii::$app->session->getFlash('unrelated'))->equals($unrelatedMessage);
+    }
+}