nextcloud/tests/lib/OpenMetrics/Exporters/ExporterTestCase.php

<?php

declare(strict_types=1);

/**
 * SPDX-FileCopyrightText: 2025 Nextcloud GmbH and Nextcloud contributors
 * SPDX-License-Identifier: AGPL-3.0-or-later
 */

namespace Test\OpenMetrics\Exporters;

use OCP\OpenMetrics\IMetricFamily;
use Test\TestCase;

abstract class ExporterTestCase extends TestCase {
	protected IMetricFamily $exporter;
	/** @var IMetric[] */
	protected array $metrics;

	abstract protected function getExporter(): IMetricFamily;

	protected function setUp(): void {
		parent::setUp();
		$this->exporter = $this->getExporter();
		$this->metrics = iterator_to_array($this->exporter->metrics());
	}

	public function testNotEmptyData() {
		$this->assertNotEmpty($this->exporter->name());
		$this->assertNotEmpty($this->metrics);
	}

	protected function assertLabelsAre(array $expectedLabels) {
		$foundLabels = [];
		foreach ($this->metrics as $metric) {
			$foundLabels[] = $metric->labels;
		}

		$this->assertSame($foundLabels, $expectedLabels);
	}
}