16ec1a3703
In T340552, the official PHP OpenTelemetry client was effectively rejected for inclusion in MediaWiki due to its size. Implement a minimal tracing library instead that eschews conformance with the OTEL client specification in favor of simplicity, while remaining capable of emitting trace data in OTLP format and thus retaining compatibility with any ingestion endpoint capable of handling OTLP. In its current state, the library supports a basic feature set that should be sufficient for basic tracing integration: * Span creation, inclusive span activation and automatic parent span assignment, * Span attributes and span kinds, * Basic resource (process/request)-level metadata generation, * Data export over OTLP. Additional functionality, such as trace propagation, can then be incrementally added to the library. Bug: T340552 Change-Id: Ibc3910058cd7ed064cad293a3cdc091344e66b86
60 lines
1.2 KiB
PHP
60 lines
1.2 KiB
PHP
<?php
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namespace Wikimedia\Tests\Telemetry;
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use MediaWikiUnitTestCase;
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use Wikimedia\Telemetry\Clock;
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/**
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* @covers \Wikimedia\Telemetry\Clock
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*/
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class ClockTest extends MediaWikiUnitTestCase {
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private Clock $clock;
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protected function setUp(): void {
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parent::setUp();
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$this->clock = new Clock();
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}
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public function testShouldReturnCurrentTime(): void {
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$this->assertClockReturnsCurrentTime();
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}
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public function testShouldAllowMockingTimestamp(): void {
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Clock::setMockTime( 2_000 );
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$this->assertSame( 2_000, $this->clock->getCurrentNanoTime() );
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Clock::setMockTime( null );
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$this->assertClockReturnsCurrentTime();
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}
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/**
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* Utility function to assert that the Clock being tested returns the current time, with some leeway.
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* @return void
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*/
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private function assertClockReturnsCurrentTime() {
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$referenceTime = (int)( 1e9 * microtime( true ) ) - hrtime( true );
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$currentTime = $referenceTime + hrtime( true );
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usleep( 1 );
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$now = $this->clock->getCurrentNanoTime();
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usleep( 1 );
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$afterTime = $referenceTime + hrtime( true );
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$this->assertGreaterThan(
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$currentTime,
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$now,
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'Too large time difference'
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);
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$this->assertLessThanOrEqual(
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$afterTime,
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$now,
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'Too large time difference'
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);
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}
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}
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