Add integration tests

Author: janklan

tests/Integration/MartinGeorgiev/Doctrine/ORM/Query/AST/Functions/DateTruncTest.php

@@ -0,0 +1,68 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Tests\Integration\MartinGeorgiev\Doctrine\ORM\Query\AST\Functions;
+
+use MartinGeorgiev\Doctrine\ORM\Query\AST\Functions\DateTrunc;
+use PHPUnit\Framework\Attributes\DataProvider;
+use PHPUnit\Framework\Attributes\Test;
+
+class DateTruncTest extends DateTestCase
+{
+    protected function getStringFunctions(): array
+    {
+        return [
+            'DATE_TRUNC' => DateTrunc::class,
+        ];
+    }
+
+    #[DataProvider('provideTruncFieldCases')]
+    #[Test]
+    public function can_truncate_to_field(string $field, string $expected): void
+    {
+        $dql = \sprintf(
+            "SELECT DATE_TRUNC('%s', t.datetime1) as result
+             FROM Fixtures\\MartinGeorgiev\\Doctrine\\Entity\\ContainsDates t
+             WHERE t.id = 1",
+            $field
+        );
+        $result = $this->executeDqlQuery($dql);
+        $this->assertSame($expected, $result[0]['result']);
+    }
+
+    /**
+     * @return \Generator<string, array{string, string}>
+     */
+    public static function provideTruncFieldCases(): \Generator
+    {
+        // Test data: datetime1 = '2023-06-15 10:30:00'
+        yield 'microseconds' => ['microseconds', '2023-06-15 10:30:00'];
+        yield 'milliseconds' => ['milliseconds', '2023-06-15 10:30:00'];
+        yield 'second' => ['second', '2023-06-15 10:30:00'];
+        yield 'minute' => ['minute', '2023-06-15 10:30:00'];
+        yield 'hour' => ['hour', '2023-06-15 10:00:00'];
+        yield 'day' => ['day', '2023-06-15 00:00:00'];
+        yield 'week' => ['week', '2023-06-12 00:00:00']; // Monday of that week
+        yield 'month' => ['month', '2023-06-01 00:00:00'];
+        yield 'quarter' => ['quarter', '2023-04-01 00:00:00'];
+        yield 'year' => ['year', '2023-01-01 00:00:00'];
+        yield 'decade' => ['decade', '2020-01-01 00:00:00'];
+        yield 'century' => ['century', '2001-01-01 00:00:00'];
+        yield 'millennium' => ['millennium', '2001-01-01 00:00:00'];
+    }
+
+    #[Test]
+    public function can_truncate_timestamptz_with_timezone(): void
+    {
+        $dql = "SELECT DATE_TRUNC('day', t.datetimetz1, 'Australia/Adelaide') as result
+                FROM Fixtures\\MartinGeorgiev\\Doctrine\\Entity\\ContainsDates t
+                WHERE t.id = 1";
+        $result = $this->executeDqlQuery($dql);
+        // The input is '2023-06-15 10:30:00+00' (UTC)
+        // In Australia/Adelaide (UTC+9:30), this is '2023-06-15 20:00:00'
+        // Truncated to day in Adelaide timezone gives '2023-06-15 00:00:00+09:30'
+        // Converted back to UTC: '2023-06-14 14:30:00+00'
+        $this->assertSame('2023-06-14 14:30:00+00', $result[0]['result']);
+    }
+}