class QueryTest

class QueryTest extends DatabaseTestBase {
    
    /**
     * Tests that we can pass an array of values directly in the query.
     */
    public function testArraySubstitution() {
        $names = $this->connection
            ->query('SELECT name FROM {test} WHERE age IN ( :ages[] ) ORDER BY age', [
            ':ages[]' => [
                25,
                26,
                27,
            ],
        ])
            ->fetchAll();
        $this->assertCount(3, $names, 'Correct number of names returned');
        $names = $this->connection
            ->query('SELECT name FROM {test} WHERE age IN ( :ages[] ) ORDER BY age', [
            ':ages[]' => [
                25,
            ],
        ])
            ->fetchAll();
        $this->assertCount(1, $names, 'Correct number of names returned');
    }
    
    /**
     * Tests that we can not pass a scalar value when an array is expected.
     */
    public function testScalarSubstitution() {
        try {
            $names = $this->connection
                ->query('SELECT name FROM {test} WHERE age IN ( :ages[] ) ORDER BY age', [
                ':ages[]' => 25,
            ])
                ->fetchAll();
            $this->fail('Array placeholder with scalar argument should result in an exception.');
        } catch (\Exception $e) {
            $this->assertInstanceOf(\InvalidArgumentException::class, $e);
        }
    }
    
    /**
     * Tests SQL injection via database query array arguments.
     */
    public function testArrayArgumentsSQLInjection() {
        // Attempt SQL injection and verify that it does not work.
        $condition = [
            "1 ;INSERT INTO {test} (name) VALUES ('test12345678'); -- " => '',
            '1' => '',
        ];
        try {
            $this->connection
                ->query("SELECT * FROM {test} WHERE name = :name", [
                ':name' => $condition,
            ])
                ->fetchObject();
            $this->fail('SQL injection attempt via array arguments should result in a database exception.');
        } catch (\InvalidArgumentException $e) {
            // Expected exception; just continue testing.
        }
        // Test that the insert query that was used in the SQL injection attempt did
        // not result in a row being inserted in the database.
        $result = $this->connection
            ->select('test')
            ->condition('name', 'test12345678')
            ->countQuery()
            ->execute()
            ->fetchField();
        $this->assertEquals(0, $result, 'SQL injection attempt did not result in a row being inserted in the database table.');
    }
    
    /**
     * Tests SQL injection via condition operator.
     */
    public function testConditionOperatorArgumentsSQLInjection() {
        $injection = "IS NOT NULL) ;INSERT INTO {test} (name) VALUES ('test12345678'); -- ";
        $previous_error_handler = set_error_handler(function ($severity, $message, $filename, $lineno, $context) use (&$previous_error_handler) {
            // Normalize the filename to use UNIX directory separators.
            if (preg_match('@core/lib/Drupal/Core/Database/Query/Condition.php$@', str_replace(DIRECTORY_SEPARATOR, '/', $filename))) {
                // Convert errors to exceptions for testing purposes below.
                throw new \ErrorException($message, 0, $severity, $filename, $lineno);
            }
            if ($previous_error_handler) {
                return $previous_error_handler($severity, $message, $filename, $lineno, $context);
            }
        });
        try {
            $result = $this->connection
                ->select('test', 't')
                ->fields('t')
                ->condition('name', 1, $injection)
                ->execute();
            $this->fail('Should not be able to attempt SQL injection via condition operator.');
        } catch (\ErrorException $e) {
            // Expected exception; just continue testing.
        }
        // Test that the insert query that was used in the SQL injection attempt did
        // not result in a row being inserted in the database.
        $result = $this->connection
            ->select('test')
            ->condition('name', 'test12345678')
            ->countQuery()
            ->execute()
            ->fetchField();
        $this->assertEquals(0, $result, 'SQL injection attempt did not result in a row being inserted in the database table.');
        // Attempt SQLi via union query with no unsafe characters.
        $this->enableModules([
            'user',
        ]);
        $this->installEntitySchema('user');
        $this->connection
            ->insert('test')
            ->fields([
            'name' => '123456',
        ])
            ->execute();
        $injection = "= 1 UNION ALL SELECT password FROM user WHERE uid =";
        try {
            $result = $this->connection
                ->select('test', 't')
                ->fields('t', [
                'name',
                'name',
            ])
                ->condition('name', 1, $injection)
                ->execute();
            $this->fail('Should not be able to attempt SQL injection via operator.');
        } catch (\ErrorException $e) {
            // Expected exception; just continue testing.
        }
        // Attempt SQLi via union query - uppercase tablename.
        $this->connection
            ->insert('TEST_UPPERCASE')
            ->fields([
            'name' => 'secrets',
        ])
            ->execute();
        $injection = "IS NOT NULL) UNION ALL SELECT name FROM {TEST_UPPERCASE} -- ";
        try {
            $result = $this->connection
                ->select('test', 't')
                ->fields('t', [
                'name',
            ])
                ->condition('name', 1, $injection)
                ->execute();
            $this->fail('Should not be able to attempt SQL injection via operator.');
        } catch (\ErrorException $e) {
            // Expected exception; just continue testing.
        }
        restore_error_handler();
    }
    
    /**
     * Tests numeric query parameter expansion in expressions.
     *
     * @see \Drupal\Core\Database\Driver\sqlite\Statement::getStatement()
     * @see http://bugs.php.net/bug.php?id=45259
     */
    public function testNumericExpressionSubstitution() {
        $count_expected = $this->connection
            ->query('SELECT COUNT(*) + 3 FROM {test}')
            ->fetchField();
        $count = $this->connection
            ->query('SELECT COUNT(*) + :count FROM {test}', [
            ':count' => 3,
        ])
            ->fetchField();
        $this->assertEqual($count, $count_expected);
    }

}