Add test for Mysqli\Result

phpcs.xml.dist

@@ -99,6 +99,7 @@
         -->
         <exclude-pattern>src/Driver/IBMDB2/Connection.php</exclude-pattern>
         <exclude-pattern>src/Driver/Mysqli/Exception/ConnectionFailed.php</exclude-pattern>
+        <exclude-pattern>tests/Functional/Driver/Mysqli/ResultTest.php</exclude-pattern>
     </rule>
 
     <!-- See https://github.com/squizlabs/PHP_CodeSniffer/issues/2837 -->

tests/Functional/Driver/Mysqli/ResultTest.php

@@ -0,0 +1,98 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Doctrine\DBAL\Tests\Functional\Driver\Mysqli;
+
+use Doctrine\DBAL\Driver\Mysqli\Result;
+use Doctrine\DBAL\Tests\FunctionalTestCase;
+use Doctrine\DBAL\Tests\TestUtil;
+use mysqli;
+use mysqli_driver;
+use mysqli_sql_exception;
+
+use function assert;
+
+use const MYSQLI_REPORT_ERROR;
+use const MYSQLI_REPORT_OFF;
+use const MYSQLI_REPORT_STRICT;
+
+/** @requires extension mysqli */
+final class ResultTest extends FunctionalTestCase
+{
+    private mysqli $nativeConnection;
+
+    protected function setUp(): void
+    {
+        if (TestUtil::isDriverOneOf('mysqli')) {
+            $nativeConnection = $this->connection->getNativeConnection();
+
+            assert($nativeConnection instanceof mysqli);
+
+            $this->nativeConnection = $nativeConnection;
+
+            $this->connection->executeStatement('CREATE TABLE my_table (my_col_1 INT NOT NULL);');
+
+            return;
+        }
+
+        self::markTestSkipped('This test requires the mysqli driver.');
+    }
+
+    protected function tearDown(): void
+    {
+        $this->connection->executeStatement('DROP TABLE IF EXISTS my_table;');
+    }
+
+    public function testSuccessfulRowCountFromAffectedRows(): void
+    {
+        $mysqliStmt = $this->nativeConnection
+            ->prepare('INSERT INTO my_table VALUES (7);');
+        $mysqliStmt->execute();
+
+        $result = new Result($mysqliStmt);
+
+        self::assertSame(1, $mysqliStmt->affected_rows);
+        self::assertSame(1, $result->rowCount());
+    }
+
+    public function testFailingRowCountFromAffectedRows(): void
+    {
+        $mysqliStmt = $this->nativeConnection
+            ->prepare('INSERT INTO my_table VALUES (NULL);');
+
+        $mysqliDriver = new mysqli_driver();
+
+        // Ensure default configuration present in PHP < 8.1.
+        $mysqliDriver->report_mode = MYSQLI_REPORT_OFF;
+
+        $mysqliStmt->execute();
+
+        self::assertSame(-1, $mysqliStmt->affected_rows);
+
+        $result = new Result($mysqliStmt);
+
+        self::assertSame(-1, $result->rowCount());
+
+        // Ensure default configuration present in PHP >= 8.1.
+        // @see: https://php.watch/versions/8.1/mysqli-error-mode.
+        $mysqliDriver->report_mode = MYSQLI_REPORT_ERROR | MYSQLI_REPORT_STRICT;
+
+        $error = null;
+
+        try {
+            $mysqliStmt->execute();
+        } catch (mysqli_sql_exception $error) {
+            // no-op.
+        }
+
+        self::assertInstanceOf(mysqli_sql_exception::class, $error);
+
+        self::assertSame(-1, $mysqliStmt->affected_rows);
+
+        $this->expectException(mysqli_sql_exception::class);
+        $this->expectExceptionMessage('Column \'my_col_1\' cannot be null');
+
+        new Result($mysqliStmt);
+    }
+}