TASK: Add first test

Add all dependencies to run tests.
Configure tests as composer task.
Add tests to travis.
Adjust code to make him exchangeable and testable.

.gitignore

@@ -12,3 +12,7 @@
 .sass-cache
 node_modules
 bower_components
+composer.lock
+package-lock.json
+typo3
+vendor

.travis.yml

@@ -12,3 +12,4 @@ install:
 script:
   - composer lint
   - composer cgl
+  - composer test

Classes/Domain/Finishers/MjmlEmailFinisher.php

@@ -1,20 +1,6 @@
 <?php
-declare(strict_types=1);
 namespace Saccas\Mjml\Domain\Finishers;
 
-/*
- * This file is part of the TYPO3 CMS project.
- *
- * It is free software; you can redistribute it and/or modify it under
- * the terms of the GNU General Public License, either version 2
- * of the License, or any later version.
- *
- * For the full copyright and license information, please read the
- * LICENSE.txt file that was distributed with this source code.
- *
- * The TYPO3 project - inspiring people to share!
- */
-
 use TYPO3\CMS\Fluid\View\StandaloneView;
 use TYPO3\CMS\Form\Domain\Finishers\Exception\FinisherException;
 use TYPO3\CMS\Form\Domain\Runtime\FormRuntime;

Classes/Domain/Renderer/Command.php

@@ -0,0 +1,45 @@
+<?php
+namespace Saccas\Mjml\Domain\Renderer;
+
+use TYPO3\CMS\Core\Utility\CommandUtility;
+use TYPO3\CMS\Core\Utility\GeneralUtility;
+
+class Command implements RendererInterface
+{
+    protected function getHtmlFromMjml($mjml)
+    {
+        $configuration = unserialize($GLOBALS['TYPO3_CONF_VARS']['EXT']['extConf']['mjml']);
+
+        $temporaryMjmlFileWithPath = GeneralUtility::tempnam('mjml_', '.mjml');
+
+        GeneralUtility::writeFileToTypo3tempDir($temporaryMjmlFileWithPath, $mjml);
+
+        // see https://mjml.io/download and https://www.npmjs.com/package/mjml-cli
+        $cmd = $configuration['nodeBinaryPath'] . ' ' . $configuration['mjmlBinaryPath'] . $configuration['mjmlBinary'];
+        $args = $configuration['mjmlParams'] . ' ' . $temporaryMjmlFileWithPath;
+
+        $result = [];
+        $returnValue = '';
+        CommandUtility::exec($this->getEscapedCommand($cmd, $args), $result, $returnValue);
+
+        GeneralUtility::unlink_tempfile($temporaryMjmlFileWithPath);
+
+        return implode('', $result);
+    }
+
+    /**
+     * @param string $cmd
+     * @param string $args
+     * @return string
+     */
+    protected function getEscapedCommand(string $cmd, string $args)
+    {
+        $escapedCmd = escapeshellcmd($cmd);
+
+        $argsArray = explode(' ', $args);
+        $escapedArgsArray = CommandUtility::escapeShellArguments($argsArray);
+        $escapedArgs = implode(' ', $escapedArgsArray);
+
+        return $escapedCmd . ' ' . $escapedArgs;
+    }
+}

Classes/Domain/Renderer/RendererInterface.php

@@ -0,0 +1,16 @@
+<?php
+namespace Saccas\Mjml\Domain\Renderer;
+
+/**
+ * Defines API of possible renderers.
+ */
+interface RendererInterface
+{
+    /**
+     * Convert mjml strings into html.
+     *
+     * @param string $mjml
+     * @return string
+     */
+    public function getHtmlFromMjml($mjml);
+}

Classes/View/MjmlBasedView.php

@@ -1,53 +1,29 @@
 <?php
-
 namespace Saccas\Mjml\View;
 
-use TYPO3\CMS\Core\Utility\GeneralUtility;
-use TYPO3\CMS\Extbase\Mvc\Cli\Command;
+use Saccas\Mjml\Domain\Renderer\RendererInterface;
 use TYPO3\CMS\Fluid\View\StandaloneView;
-use TYPO3\CMS\Core\Utility\CommandUtility;
+use TYPO3\CMS\Frontend\ContentObject\ContentObjectRenderer;
 
 class MjmlBasedView extends StandaloneView
 {
+    /**
+     * @var RendererInterface
+     */
+    protected $renderer;
+
+    public function __construct(ContentObjectRenderer $contentObject = null, RendererInterface $renderer = null)
+    {
+        parent::__construct($contentObject);
+
+        $this->renderer = $renderer;
+        if ($this->renderer === null) {
+            $this->renderer = $this->objectManager->get(RendererInterface::class);
+        }
+    }
+
     public function render($actionName = null)
     {
-        return $this->getHtmlFromMjml(parent::render());
-    }
-
-    protected function getHtmlFromMjml($mjml)
-    {
-        $configuration = unserialize($GLOBALS['TYPO3_CONF_VARS']['EXT']['extConf']['mjml']);
-
-        $temporaryMjmlFileWithPath = GeneralUtility::tempnam('mjml_', '.mjml');
-
-        GeneralUtility::writeFileToTypo3tempDir($temporaryMjmlFileWithPath, $mjml);
-
-        // see https://mjml.io/download and https://www.npmjs.com/package/mjml-cli
-        $cmd = $configuration['nodeBinaryPath'] . ' ' . $configuration['mjmlBinaryPath'] . $configuration['mjmlBinary'];
-        $args = $configuration['mjmlParams'] . ' ' . $temporaryMjmlFileWithPath;
-
-        $result = [];
-        $returnValue = '';
-        CommandUtility::exec($this->getEscapedCommand($cmd, $args), $result, $returnValue);
-
-        GeneralUtility::unlink_tempfile($temporaryMjmlFileWithPath);
-
-        return implode('', $result);
-    }
-
-    /**
-     * @param string $cmd
-     * @param string $args
-     * @return string
-     */
-    private function getEscapedCommand(string $cmd, string $args)
-    {
-        $escapedCmd = escapeshellcmd($cmd);
-
-        $argsArray = explode(' ', $args);
-        $escapedArgsArray = CommandUtility::escapeShellArguments($argsArray);
-        $escapedArgs = implode(' ', $escapedArgsArray);
-
-        return $escapedCmd . ' ' . $escapedArgs;
+        return $this->renderer->getHtmlFromMjml(parent::render($actionName));
     }
 }

Tests/Unit/AbstractUnitTestCase.php

@@ -0,0 +1,22 @@
+<?php
+namespace Saccas\Mjml\Tests\Unit;
+
+use TYPO3\CMS\Core\Cache\Backend\NullBackend;
+use TYPO3\CMS\Core\Cache\CacheManager;
+use TYPO3\CMS\Core\Utility\GeneralUtility;
+use TYPO3\TestingFramework\Core\Unit\UnitTestCase;
+
+abstract class AbstractUnitTestCase extends UnitTestCase
+{
+    public function setUp()
+    {
+        parent::setUp();
+
+        GeneralUtility::makeInstance(CacheManager::class)
+            ->setCacheConfigurations([
+                'extbase_object' => [
+                    'backend' => NullBackend::class,
+                ],
+            ]);
+    }
+}

Tests/Unit/View/MjmlBasedViewTest.php

@@ -0,0 +1,55 @@
+<?php
+namespace Saccas\Mjml\Tests\Unit\View;
+
+use Saccas\Mjml\Domain\Renderer\RendererInterface;
+use Saccas\Mjml\Tests\Unit\AbstractUnitTestCase;
+use Saccas\Mjml\View\MjmlBasedView;
+
+class MjmlBasedViewTest extends AbstractUnitTestCase
+{
+    public const EXAMPLE_MJML_TEMPLATE = '<mjml>
+  <mj-body>
+    <mj-container>
+      <mj-section>
+        <mj-column>
+          <mj-image src="/assets/img/easy-and-quick.png" width="112" />
+          <mj-text font-size="20px" color="#595959" align="center">Easy and Quick</mj-text>
+        </mj-column>
+        <mj-column>
+          <mj-image src="/assets/img/responsive.png" width="135" />
+          <mj-text font-size="20px" color="#595959" align="center">Responsive</mj-text>
+        </mj-column>
+      </mj-section>
+      <mj-section>
+        <mj-column>
+          <mj-button background-color="#F45E43" font-size="15px">Discover</mj-button>
+        </mj-column>
+      </mj-section>
+    </mj-container>
+  </mj-body>
+</mjml>
+';
+
+    /**
+     * @test
+     */
+    public function viewCallsRendererAndReturnsRenderedHtml()
+    {
+        $expectedHtml = '<h1>Simple HTML</h1>';
+        $rendererMock = $this->getMockBuilder(RendererInterface::class)->getMock();
+        $rendererMock->expects($this->once())
+            ->method('getHtmlFromMjml')
+            ->with(static::EXAMPLE_MJML_TEMPLATE)
+            ->willReturn($expectedHtml);
+
+        $subject = new MjmlBasedView(null, $rendererMock);
+        $subject->setTemplateSource(static::EXAMPLE_MJML_TEMPLATE);
+        $result = $subject->render();
+
+        $this->assertSame(
+            $expectedHtml,
+            $result,
+            'Rendering of view did not return expected HTML.'
+        );
+    }
+}

composer.json

@@ -10,13 +10,26 @@
             "Saccas\\Mjml\\": "Classes/"
         }
     },
+    "autoload-dev": {
+        "psr-4": {
+            "Saccas\\Mjml\\Tests\\": "Tests/"
+        }
+    },
     "require": {
         "php": ">=7.0.0 <=7.2.99",
         "typo3/cms-core": "^8.7.0",
         "typo3/cms-form": "^8.7.0"
     },
     "require-dev": {
-        "squizlabs/php_codesniffer": "^3.2.0"
+        "squizlabs/php_codesniffer": "^3.2.0",
+        "typo3/cms": "^8.7.0",
+        "typo3/testing-framework": "^1.2.2"
+    },
+    "extra": {
+        "typo3/cms": {
+            "cms-package-dir": "{$vendor-dir}/typo3/cms",
+            "web-dir": "typo3"
+        }
     },
     "scripts": {
         "lint": [
@@ -26,6 +39,9 @@
         "cgl": [
             "./vendor/bin/phpcs"
         ],
+        "test": [
+            "TYPO3_PATH_ROOT=typo3 ./vendor/bin/phpunit"
+        ],
         "post-install-cmd": [
             "npm install"
         ]

phpunit.xml.dist

@@ -0,0 +1,28 @@
+<phpunit
+    backupGlobals="false"
+    backupStaticAttributes="false"
+    bootstrap="./vendor/typo3/testing-framework/Resources/Core/Build/UnitTestsBootstrap.php"
+
+    colors="true"
+    convertErrorsToExceptions="false"
+    convertWarningsToExceptions="false"
+    forceCoversAnnotation="false"
+    processIsolation="false"
+    stopOnError="false"
+    stopOnFailure="false"
+    stopOnIncomplete="false"
+    stopOnSkipped="false"
+    verbose="false">
+
+    <testsuites>
+        <testsuite name="unit-tests">
+            <directory>./Tests/Unit/</directory>
+        </testsuite>
+    </testsuites>
+
+    <filter>
+        <whitelist>
+            <directory suffix=".php">Classes</directory>
+        </whitelist>
+    </filter>
+</phpunit>