Add tests for query builder (i)like

Signed-off-by: Robin Appelman <robin@icewind.nl>

lib/private/Files/Cache/Cache.php

@@ -543,7 +543,7 @@ class Cache implements ICache {
 
 				try {
 					$query->execute();
-				} catch (\Exception $e) {
+				} catch (\OC\DatabaseException $e) {
 					$this->connection->rollBack();
 					throw $e;
 				}

tests/lib/DB/QueryBuilder/ExpressionBuilderDBTest.php

@@ -0,0 +1,106 @@
+<?php
+/**
+ * @copyright Copyright (c) 2017 Robin Appelman <robin@icewind.nl>
+ *
+ * @license GNU AGPL version 3 or any later version
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+namespace Test\DB\QueryBuilder;
+
+use OC\DB\QueryBuilder\Literal;
+use Test\TestCase;
+
+/**
+ * @group DB
+ */
+class ExpressionBuilderDBTest extends TestCase {
+	/** @var \Doctrine\DBAL\Connection|\OCP\IDBConnection */
+	protected $connection;
+
+	protected function setUp() {
+		parent::setUp();
+
+		$this->connection = \OC::$server->getDatabaseConnection();
+	}
+
+	public function likeProvider() {
+		$connection = \OC::$server->getDatabaseConnection();
+
+		return [
+			['foo', 'bar', false],
+			['foo', 'foo', true],
+			['foo', 'f%', true],
+			['foo', '%o', true],
+			['foo', '%', true],
+			['foo', 'fo_', true],
+			['foo', 'foo_', false],
+			['foo', $connection->escapeLikeParameter('fo_'), false],
+			['foo', $connection->escapeLikeParameter('f%'), false],
+		];
+	}
+
+	/**
+	 * @dataProvider likeProvider
+	 *
+	 * @param string $param1
+	 * @param string $param2
+	 * @param boolean $match
+	 */
+	public function testLike($param1, $param2, $match) {
+		$query = $this->connection->getQueryBuilder();
+
+		$query->select(new Literal('1'))
+			->from('users')
+			->where($query->expr()->like($query->createNamedParameter($param1), $query->createNamedParameter($param2)));
+
+		$this->assertEquals($match, $query->execute()->fetchColumn());
+	}
+
+	public function ilikeProvider() {
+		$connection = \OC::$server->getDatabaseConnection();
+
+		return [
+			['foo', 'bar', false],
+			['foo', 'foo', true],
+			['foo', 'Foo', true],
+			['foo', 'f%', true],
+			['foo', '%o', true],
+			['foo', '%', true],
+			['foo', 'fo_', true],
+			['foo', 'foo_', false],
+			['foo', $connection->escapeLikeParameter('fo_'), false],
+			['foo', $connection->escapeLikeParameter('f%'), false],
+		];
+	}
+
+	/**
+	 * @dataProvider ilikeProvider
+	 *
+	 * @param string $param1
+	 * @param string $param2
+	 * @param boolean $match
+	 */
+	public function testILike($param1, $param2, $match) {
+		$query = $this->connection->getQueryBuilder();
+
+		$query->select(new Literal('1'))
+			->from('users')
+			->where($query->expr()->iLike($query->createNamedParameter($param1), $query->createNamedParameter($param2)));
+
+		$this->assertEquals($match, $query->execute()->fetchColumn());
+	}
+}