Codeception test adjustments for basic and advanced applications

- Moved everything test-related into `tests` directory. Codeception tests are in `codeception`.
- Removed database module since we're using fixtures and migrations.
- Moved console entry points and bootstrap into `tests/codeception/bin`.
- Adjusted travis build scripts.
- Adjusted documentation to be consistent and reflect changes made.

apps/basic/tests/codeception/acceptance/AboutCept.php

@@ -0,0 +1,8 @@
+<?php
+
+use codeception\_pages\AboutPage;
+
+$I = new WebGuy($scenario);
+$I->wantTo('ensure that about works');
+AboutPage::openBy($I);
+$I->see('About', 'h1');

apps/basic/tests/codeception/acceptance/ContactCept.php

@@ -0,0 +1,49 @@
+<?php
+
+use codeception\_pages\ContactPage;
+
+$I = new WebGuy($scenario);
+$I->wantTo('ensure that contact works');
+
+$contactPage = ContactPage::openBy($I);
+
+$I->see('Contact', 'h1');
+
+$I->amGoingTo('submit contact form with no data');
+$contactPage->submit([]);
+$I->expectTo('see validations errors');
+$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');
+$I->see('The verification code is incorrect');
+
+$I->amGoingTo('submit contact form with not correct email');
+$contactPage->submit([
+    'name'			=>	'tester',
+    'email'			=>	'tester.email',
+    'subject'		=>	'test subject',
+    'body'			=>	'test content',
+    'verifyCode'	=>	'testme',
+]);
+$I->expectTo('see that email adress 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');
+$I->dontSee('The verification code is incorrect', '.help-inline');
+
+$I->amGoingTo('submit contact form with correct data');
+$contactPage->submit([
+    'name'			=>	'tester',
+    'email'			=>	'tester@example.com',
+    'subject'		=>	'test subject',
+    'body'			=>	'test content',
+    'verifyCode'	=>	'testme',
+]);
+if (method_exists($I, 'wait')) {
+    $I->wait(3); // only for selenium
+}
+$I->dontSeeElement('#contact-form');
+$I->see('Thank you for contacting us. We will respond to you as soon as possible.');

apps/basic/tests/codeception/acceptance/HomeCept.php

@@ -0,0 +1,9 @@
+<?php
+
+$I = new WebGuy($scenario);
+$I->wantTo('ensure that home page works');
+$I->amOnPage(Yii::$app->homeUrl);
+$I->see('My Company');
+$I->seeLink('About');
+$I->click('About');
+$I->see('This is the About page.');

apps/basic/tests/codeception/acceptance/LoginCept.php

@@ -0,0 +1,32 @@
+<?php
+
+use codeception\_pages\LoginPage;
+
+$I = new WebGuy($scenario);
+$I->wantTo('ensure that login works');
+
+$loginPage = LoginPage::openBy($I);
+
+$I->see('Login', 'h1');
+
+$I->amGoingTo('try to login with empty credentials');
+$loginPage->login('', '');
+$I->expectTo('see validations errors');
+$I->see('Username cannot be blank.');
+$I->see('Password cannot be blank.');
+
+$I->amGoingTo('try to login with wrong credentials');
+$loginPage->login('admin', 'wrong');
+if (method_exists($I, 'wait')) {
+    $I->wait(3); // only for selenium
+}
+$I->expectTo('see validations errors');
+$I->see('Incorrect username or password.');
+
+$I->amGoingTo('try to login with correct credentials');
+$loginPage->login('admin', 'admin');
+if (method_exists($I, 'wait')) {
+    $I->wait(3); // only for selenium
+}
+$I->expectTo('see user info');
+$I->see('Logout (admin)');

apps/basic/tests/codeception/acceptance/_bootstrap.php

@@ -0,0 +1,3 @@
+<?php
+
+new yii\web\Application(require(__DIR__ . '/_config.php'));

apps/basic/tests/codeception/acceptance/_config.php

@@ -0,0 +1,13 @@
+<?php
+
+return yii\helpers\ArrayHelper::merge(
+    require(__DIR__ . '/../../../config/web.php'),
+    require(__DIR__ . '/../_config.php'),
+    [
+        'components' => [
+            'db' => [
+                'dsn' => 'mysql:host=localhost;dbname=yii2_basic_acceptance',
+            ],
+        ],
+    ]
+);