Описана базовая миграция, добавлена модель аккаунта, добавлена модель авторизации, написаны первичные тесты для этой модели, добавлен модуль авторизации, настроен базовый контроллер. Короче много чего сделано

tests/codeception/api/unit/modules/login/models/AuthenticationFormTest.php

@@ -0,0 +1,124 @@
+<?php
+namespace tests\codeception\api\modules\login\models;
+
+use api\modules\login\models\AuthenticationForm;
+use Codeception\Specify;
+use tests\codeception\api\unit\DbTestCase;
+use tests\codeception\common\fixtures\AccountFixture;
+use Yii;
+
+class AuthenticationFormTest extends DbTestCase {
+
+    use Specify;
+
+    protected function tearDown() {
+        Yii::$app->user->logout();
+        parent::tearDown();
+    }
+
+    public function testValidateEmail() {
+        $model = new AuthenticationForm();
+        $this->specify('error.email_required expected if email is not set', function() use ($model) {
+            $model->validate(['email']);
+            expect($model->getErrors('email'))->equals(['error.email_required']);
+        });
+
+        $this->specify('error.email_invalid expected if email not correct', function() use ($model) {
+            $model->email = 'wrong-email-string';
+            $model->validate(['email']);
+            expect($model->getErrors('email'))->equals(['error.email_invalid']);
+
+            $model->email = 'wrong@email';
+            $model->validate(['email']);
+            expect($model->getErrors('email'))->equals(['error.email_invalid']);
+        });
+
+        $this->specify('error.email_not_exist expected if email not exists in database', function() use ($model) {
+            $model->email = 'not-exist@user.com';
+            $model->validate(['email']);
+            expect($model->getErrors('email'))->equals(['error.email_not_exist']);
+        });
+
+        $this->specify('no errors if email is correct and exists in database', function() use ($model) {
+            $model->email = 'admin@ely.by';
+            $model->validate(['email']);
+            expect($model->getErrors('email'))->isEmpty();
+        });
+    }
+
+    public function testValidatePassword() {
+        $model = new AuthenticationForm();
+        $this->specify('error.password_required expected if password is not set', function() use ($model) {
+            $model->validate(['password']);
+            expect($model->getErrors('password'))->equals(['error.password_required']);
+        });
+
+        $this->specify('error.password_incorrect expected if password not correct for passed email', function() use ($model) {
+            $model->email = 'non-exist@valid.mail';
+            $model->password = 'wrong-password';
+            $model->validate(['password']);
+            expect('if email incorrect, the error should be displayed in any case,', $model->getErrors('password'))
+                ->equals(['error.password_incorrect']);
+
+            $model->email = 'admin@ely.by';
+            $model->password = 'wrong-password';
+            $model->validate(['password']);
+            expect($model->getErrors('password'))->equals(['error.password_incorrect']);
+        });
+
+        $this->specify('no errors if email and password is correct and exists in database', function() use ($model) {
+            $model->email = 'admin@ely.by';
+            $model->password = 'password_0';
+            $model->validate(['password']);
+            expect($model->getErrors('password'))->isEmpty();
+        });
+    }
+
+    public function testLoginNoUser() {
+        $model = new AuthenticationForm([
+            'email'    => 'non-exist@valid.mail',
+            'password' => 'not_existing_password',
+        ]);
+
+        $this->specify('user should not be able to login, when there is no identity', function () use ($model) {
+            expect('model should not login user', $model->login())->false();
+            expect('user should not be logged in', Yii::$app->user->isGuest)->true();
+        });
+    }
+
+    public function testLoginWrongPassword() {
+        $model = new AuthenticationForm([
+            'email'    => 'admin@ely.by',
+            'password' => 'wrong_password',
+        ]);
+
+        $this->specify('user should not be able to login with wrong password', function () use ($model) {
+            expect('model should not login user', $model->login())->false();
+            expect('error message should be set', $model->errors)->hasKey('password');
+            expect('user should not be logged in', Yii::$app->user->isGuest)->true();
+        });
+    }
+
+    public function testLoginCorrect() {
+        $model = new AuthenticationForm([
+            'email'    => 'admin@ely.by',
+            'password' => 'password_0',
+        ]);
+
+        $this->specify('user should be able to login with correct credentials', function () use ($model) {
+            expect('model should login user', $model->login())->true();
+            expect('error message should not be set', $model->errors)->hasntKey('password');
+            expect('user should be logged in', Yii::$app->user->isGuest)->false();
+        });
+    }
+
+    public function fixtures() {
+        return [
+            'user' => [
+                'class' => AccountFixture::className(),
+                'dataFile' => '@tests/codeception/api/unit/fixtures/data/models/accounts.php'
+            ],
+        ];
+    }
+
+}