Adding multihost - locking

Adding Unit-Tests for it

tests/src/Core/Lock/CacheLockDriverTest.php

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+<?php
+
+namespace Friendica\Test\src\Core\Lock;
+
+
+use Friendica\Core\Cache\ArrayCache;
+use Friendica\Core\Lock\CacheLockDriver;
+
+class CacheLockDriverTest extends LockTest
+{
+	/**
+	 * @var \Friendica\Core\Cache\IMemoryCacheDriver
+	 */
+	private $cache;
+
+	protected function getInstance()
+	{
+		$this->cache = new ArrayCache();
+		return new CacheLockDriver($this->cache);
+	}
+
+	public function tearDown()
+	{
+		$this->cache->clear();
+		parent::tearDown();
+	}
+}

tests/src/Core/Lock/DatabaseLockDriverTest.php

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+<?php
+
+namespace Friendica\Test\src\Core\Lock;
+
+use dba;
+use Friendica\Core\Lock\DatabaseLockDriver;
+use Friendica\Database\DBStructure;
+use PHPUnit\DbUnit\DataSet\YamlDataSet;
+use PHPUnit\DbUnit\TestCaseTrait;
+use PHPUnit_Extensions_Database_DB_IDatabaseConnection;
+
+class DatabaseLockDriverTest extends LockTest
+{
+	use TestCaseTrait;
+
+	/**
+	 * Get database connection.
+	 *
+	 * This function is executed before each test in order to get a database connection that can be used by tests.
+	 * If no prior connection is available, it tries to create one using the USER, PASS and DB environment variables.
+	 *
+	 * If it could not connect to the database, the test is skipped.
+	 *
+	 * @return PHPUnit_Extensions_Database_DB_IDatabaseConnection
+	 * @see https://phpunit.de/manual/5.7/en/database.html
+	 */
+	protected function getConnection()
+	{
+		if (!dba::$connected) {
+			dba::connect('localhost', getenv('USER'), getenv('PASS'), getenv('DB'));
+
+			if (dba::$connected) {
+				$app = get_app();
+				// We need to do this in order to disable logging
+				$app->module = 'install';
+
+				// Create database structure
+				DBStructure::update(false, true, true);
+			} else {
+				$this->markTestSkipped('Could not connect to the database.');
+			}
+		}
+
+		return $this->createDefaultDBConnection(dba::get_db(), getenv('DB'));
+	}
+
+	/**
+	 * Get dataset to populate the database with.
+	 * @return YamlDataSet
+	 * @see https://phpunit.de/manual/5.7/en/database.html
+	 */
+	protected function getDataSet()
+	{
+		return new YamlDataSet(__DIR__ . '/../../../datasets/api.yml');
+	}
+
+	protected function getInstance()
+	{
+		return new DatabaseLockDriver();
+	}
+
+	public function tearDown()
+	{
+		dba::delete('locks', [ 'id > 0']);
+		parent::tearDown();
+	}
+}

tests/src/Core/Lock/LockTest.php

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+<?php
+
+namespace Friendica\Test\src\Core\Lock;
+
+use Friendica\App;
+use Friendica\Core\Config;
+use PHPUnit\Framework\TestCase;
+
+abstract class LockTest extends TestCase
+{
+	/**
+	 * @var \Friendica\Core\Lock\ILockDriver
+	 */
+	protected $instance;
+
+	abstract protected function getInstance();
+
+	protected function setUp()
+	{
+		global $a;
+		parent::setUp();
+		$this->instance = $this->getInstance();
+
+		// Reusable App object
+		$this->app = new App(__DIR__.'/../');
+		$a = $this->app;
+
+		// Default config
+		Config::set('config', 'hostname', 'localhost');
+		Config::set('system', 'throttle_limit_day', 100);
+		Config::set('system', 'throttle_limit_week', 100);
+		Config::set('system', 'throttle_limit_month', 100);
+		Config::set('system', 'theme', 'system_theme');
+	}
+
+	public function testLock() {
+		$this->instance->acquireLock('foo', 1);
+		$this->assertTrue($this->instance->isLocked('foo'));
+		$this->assertFalse($this->instance->isLocked('bar'));
+	}
+
+	public function testDoubleLock() {
+		$this->instance->acquireLock('foo', 1);
+		$this->assertTrue($this->instance->isLocked('foo'));
+		// We already locked it
+		$this->assertTrue($this->instance->acquireLock('foo', 1));
+	}
+
+	public function testReleaseLock() {
+		$this->instance->acquireLock('foo', 1);
+		$this->assertTrue($this->instance->isLocked('foo'));
+		$this->instance->releaseLock('foo');
+		$this->assertFalse($this->instance->isLocked('foo'));
+	}
+
+	public function testReleaseAll() {
+		$this->instance->acquireLock('foo', 1);
+		$this->instance->acquireLock('bar', 1);
+		$this->instance->acquireLock('#/$%§', 1);
+
+		$this->instance->releaseAll();
+
+		$this->assertFalse($this->instance->isLocked('foo'));
+		$this->assertFalse($this->instance->isLocked('bar'));
+		$this->assertFalse($this->instance->isLocked('#/$%§'));
+	}
+
+	public function testReleaseAfterUnlock() {
+		$this->instance->acquireLock('foo', 1);
+		$this->instance->acquireLock('bar', 1);
+		$this->instance->acquireLock('#/$%§', 1);
+
+		$this->instance->releaseLock('foo');
+
+		$this->instance->releaseAll();
+
+		$this->assertFalse($this->instance->isLocked('bar'));
+		$this->assertFalse($this->instance->isLocked('#/$%§'));
+	}
+}

tests/src/Core/Lock/SemaphoreLockDriverTest.php

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+<?php
+
+namespace Friendica\Test\src\Core\Lock;
+
+
+use Friendica\Core\Lock\SemaphoreLockDriver;
+
+class SemaphoreLockDriverTest extends LockTest
+{
+	protected function getInstance()
+	{
+		return new SemaphoreLockDriver();
+	}
+}