init

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');              
+    }
+}