mirror of
https://github.com/Vateron-Media/XC_VM.git
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78 lines
2.9 KiB
PHP
78 lines
2.9 KiB
PHP
<?php
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use PHPUnit\Framework\TestCase;
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use XcVm\Cli\CronJobs\EpgCronJob;
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use XcVm\Tests\Support\InstallSchema;
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/**
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* The EPG job keeps, of programmes with the same source, channel and start,
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* the last one stored. It does so in one pass over the duplicated keys, with
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* the rows the self-join it replaces left, without reading each programme
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* against every other of its channel.
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*/
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final class EpgDedupeTest extends TestCase {
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/** The statement before: every programme against every other. */
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private const SELF_JOIN = 'DELETE n1 FROM `epg_data` n1, `epg_data` n2 WHERE n1.id < n2.id AND n1.epg_id = n2.epg_id AND n1.channel_id = n2.channel_id AND n1.start = n2.start;';
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private TestDb $rDb;
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protected function setUp(): void {
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$this->rDb = new TestDb();
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$this->rDb->exec(InstallSchema::table('epg_data'));
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}
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/** 40 channels of 50 programmes, then doubles, a triple, another case, NULL channels and a second source. */
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private function fill(): void {
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$rRows = [];
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for ($c = 1; $c <= 40; $c++) {
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for ($p = 0; $p < 50; $p++) {
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$rRows[] = [1, 'ch' . $c, 1000 + $p * 60];
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}
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}
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$rRows = array_merge($rRows, [[1, 'ch1', 1000], [1, 'ch2', 1060], [1, 'ch3', 1120], [1, 'ch3', 1120], [1, 'CH4', 1000], [1, null, 1000], [1, null, 1000], [2, 'ch1', 1000]]);
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foreach (array_chunk($rRows, 500) as $rChunk) {
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$this->rDb->query('INSERT INTO `epg_data` (`epg_id`, `channel_id`, `start`, `end`, `title`) VALUES ' . implode(', ', array_fill(0, count($rChunk), "(?, ?, ?, 0, 't')")), ...array_merge(...$rChunk));
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}
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}
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/** @return list<int> the ids left */
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private function left(): array {
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$this->rDb->query('SELECT `id` FROM `epg_data` ORDER BY `id`');
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return array_map('intval', $this->rDb->get_column());
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}
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private function reads(string $rStatement): int {
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$this->rDb->exec('FLUSH STATUS');
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$this->rDb->exec($rStatement);
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$rReads = 0;
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foreach ($this->rDb->pdo->query("SHOW SESSION STATUS LIKE 'Handler_read%'")->fetchAll(\PDO::FETCH_KEY_PAIR) as $rValue) {
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$rReads += (int) $rValue;
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}
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return $rReads;
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}
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public function testTheSameProgrammesAreLeftAsBefore(): void {
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$this->fill();
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$this->rDb->exec('CREATE TABLE `epg_copy` LIKE `epg_data`');
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$this->rDb->exec('INSERT INTO `epg_copy` SELECT * FROM `epg_data`');
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$this->rDb->exec(EpgCronJob::DEDUPE);
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$rNew = $this->left();
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$this->rDb->exec('TRUNCATE `epg_data`');
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$this->rDb->exec('INSERT INTO `epg_data` SELECT * FROM `epg_copy`');
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$this->rDb->exec(self::SELF_JOIN);
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$this->assertSame($this->left(), $rNew);
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$this->assertCount(2000 + 2 + 1, $rNew, 'one of each key, the two NULL channels and the second source kept');
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}
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public function testItDoesNotReadEachProgrammeAgainstItsChannel(): void {
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$this->fill();
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$this->assertLessThan(10 * 2008, $this->reads(EpgCronJob::DEDUPE));
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$this->rDb->exec('TRUNCATE `epg_data`');
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$this->fill();
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$this->assertGreaterThan(10 * 2008, $this->reads(self::SELF_JOIN), 'the self-join it replaces');
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}
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}
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