sqrtspace-php/tests/Algorithms/ExternalSortTest.php
2025-07-20 04:08:08 -04:00

111 lines
3.0 KiB
PHP

<?php
declare(strict_types=1);
namespace SqrtSpace\SpaceTime\Tests\Algorithms;
use PHPUnit\Framework\TestCase;
use SqrtSpace\SpaceTime\Algorithms\ExternalSort;
use SqrtSpace\SpaceTime\SpaceTimeConfig;
class ExternalSortTest extends TestCase
{
protected function setUp(): void
{
parent::setUp();
SpaceTimeConfig::configure([
'external_storage_path' => sys_get_temp_dir() . '/spacetime_test',
]);
}
protected function tearDown(): void
{
$path = sys_get_temp_dir() . '/spacetime_test';
if (is_dir($path)) {
array_map('unlink', glob("$path/*"));
rmdir($path);
}
parent::tearDown();
}
public function testBasicSort(): void
{
$data = [5, 2, 8, 1, 9, 3, 7, 4, 6];
$sorted = ExternalSort::sort($data);
$this->assertEquals([1, 2, 3, 4, 5, 6, 7, 8, 9], $sorted);
}
public function testSortWithCustomComparator(): void
{
$data = [5, 2, 8, 1, 9, 3, 7, 4, 6];
$sorted = ExternalSort::sort($data, fn($a, $b) => $b <=> $a);
$this->assertEquals([9, 8, 7, 6, 5, 4, 3, 2, 1], $sorted);
}
public function testSortBy(): void
{
$data = [
['name' => 'John', 'age' => 25],
['name' => 'Jane', 'age' => 30],
['name' => 'Bob', 'age' => 20],
];
$sorted = ExternalSort::sortBy($data, fn($item) => $item['age']);
$this->assertEquals('Bob', $sorted[0]['name']);
$this->assertEquals('John', $sorted[1]['name']);
$this->assertEquals('Jane', $sorted[2]['name']);
}
public function testLargeDataSet(): void
{
// Generate large dataset
$data = [];
for ($i = 0; $i < 20000; $i++) {
$data[] = mt_rand(1, 100000);
}
$sorted = ExternalSort::sort($data);
// Verify it's sorted
for ($i = 1; $i < count($sorted); $i++) {
$this->assertGreaterThanOrEqual($sorted[$i - 1], $sorted[$i]);
}
// Verify same elements
$this->assertEquals(count($data), count($sorted));
sort($data);
$this->assertEquals($data, $sorted);
}
public function testSortObjects(): void
{
$objects = [
(object)['id' => 3, 'value' => 'c'],
(object)['id' => 1, 'value' => 'a'],
(object)['id' => 2, 'value' => 'b'],
];
$sorted = ExternalSort::sortBy($objects, fn($obj) => $obj->id);
$this->assertEquals(1, $sorted[0]->id);
$this->assertEquals(2, $sorted[1]->id);
$this->assertEquals(3, $sorted[2]->id);
}
public function testStreamingSort(): void
{
$data = range(10, 1);
$result = [];
foreach (ExternalSort::sortStreaming($data) as $item) {
$result[] = $item;
}
$this->assertEquals(range(1, 10), $result);
}
}