Reproduce MySQL warnings with and without emulated prepares

tests/Functional/Platform/MySQLWarningsWithBinaryTest.php

@@ -0,0 +1,85 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Doctrine\DBAL\Tests\Functional\Platform;
+
+use Doctrine\DBAL\Connection;
+use Doctrine\DBAL\ParameterType;
+use Doctrine\DBAL\Schema\Table;
+use Doctrine\DBAL\Tests\FunctionalTestCase;
+use Doctrine\DBAL\Tests\TestUtil;
+use PDO;
+use PHPUnit\Framework\Attributes\Before;
+use PHPUnit\Framework\Attributes\DataProvider;
+use PHPUnit\Framework\Attributes\Test;
+
+use function assert;
+use function hex2bin;
+
+/** @psalm-import-type WrapperParameterTypeArray from Connection */
+final class MySQLWarningsWithBinaryTest extends FunctionalTestCase
+{
+    #[Before]
+    public function createTable(): void
+    {
+        if (! TestUtil::isDriverOneOf('pdo_mysql')) {
+            self::markTestSkipped('This is only relevant when using PDO with emulated prepared statemes');
+        }
+
+        $table = new Table('binary_warnings_test');
+        $table->addColumn('id', 'binary', ['notnull' => false, 'length' => 16]);
+        $table->setPrimaryKey(['id']);
+
+        $this->dropAndCreateTable($table);
+    }
+
+    /** @psalm-param WrapperParameterTypeArray $types */
+    #[Test]
+    #[DataProvider('useCases')]
+    public function binaryValuesDoNotEmitWarningsWithEmulation(string $query, array $types): void
+    {
+        $this->connection->executeStatement($query, [hex2bin('0191d886e6dc73e7af1fee7f99ec6235')], $types);
+
+        self::assertSame([], $this->connection->executeQuery('SHOW WARNINGS')->fetchAllAssociative());
+    }
+
+    /** @psalm-param WrapperParameterTypeArray $types */
+    #[Test]
+    #[DataProvider('useCases')]
+    public function binaryValuesDoNotEmitWarningsWithoutEmulation(string $query, array $types): void
+    {
+        $pdo = $this->connection->getNativeConnection();
+        assert($pdo instanceof PDO);
+
+        $pdo->setAttribute(PDO::ATTR_EMULATE_PREPARES, false);
+        $this->connection->executeStatement($query, [hex2bin('0191d886e6dc73e7af1fee7f99ec6235')], $types);
+        $pdo->setAttribute(PDO::ATTR_EMULATE_PREPARES, true);
+
+        self::assertSame([], $this->connection->executeQuery('SHOW WARNINGS')->fetchAllAssociative());
+    }
+
+    /** @return iterable<array{string, WrapperParameterTypeArray}> */
+    public static function useCases(): iterable
+    {
+        yield '_binary and ParameterType::BINARY' => [
+            'INSERT INTO `binary_warnings_test` (`id`) VALUES (_binary ?)',
+            [ParameterType::BINARY],
+        ];
+
+        yield '_binary and ParameterType::STRING' => [
+            'INSERT INTO `binary_warnings_test` (`id`) VALUES (_binary ?)',
+            [],
+        ];
+
+        yield 'string and ParameterType::BINARY' => [
+            'INSERT INTO `binary_warnings_test` (`id`) VALUES (?)',
+            [ParameterType::BINARY],
+        ];
+
+        yield 'string and ParameterType::STRING' => [
+            'INSERT INTO `binary_warnings_test` (`id`) VALUES (?)',
+            [],
+        ];
+    }
+}