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|
<?php
namespace Wikimedia\Tests\Telemetry;
use MediaWikiUnitTestCase;
use Wikimedia\Assert\InvariantException;
use Wikimedia\Telemetry\SpanContext;
use Wikimedia\Telemetry\SpanInterface;
use Wikimedia\Telemetry\TracerState;
/**
* @covers \Wikimedia\Telemetry\TracerState
*/
class TracerStateTest extends MediaWikiUnitTestCase {
private TracerState $tracerState;
protected function setUp(): void {
parent::setUp();
$this->tracerState = new TracerState();
}
public function testShouldMaintainStackOfActiveSpans(): void {
$firstSpanContext = new SpanContext(
'',
str_repeat( 'a', 16 ),
null,
'',
true
);
$secondSpanContext = new SpanContext(
'',
str_repeat( 'b', 16 ),
null,
'',
true
);
$this->assertNull( $this->tracerState->getActiveSpanContext() );
$this->tracerState->activateSpan( $firstSpanContext );
$this->assertSame( $firstSpanContext, $this->tracerState->getActiveSpanContext() );
$this->tracerState->activateSpan( $secondSpanContext );
$this->assertSame( $secondSpanContext, $this->tracerState->getActiveSpanContext() );
$this->tracerState->deactivateSpan( $secondSpanContext );
$this->assertSame( $firstSpanContext, $this->tracerState->getActiveSpanContext() );
$this->tracerState->deactivateSpan( $firstSpanContext );
$this->assertNull( $this->tracerState->getActiveSpanContext() );
}
public function testShouldRejectDeactivatingSpanWhenNoSpanIsActive(): void {
$this->expectException( InvariantException::class );
$this->expectExceptionMessage( 'Attempted to deactivate a span which is not the active span.' );
try {
$span = $this->createMock( SpanInterface::class );
$this->tracerState->deactivateSpan( new SpanContext( '', '', null, '', false ) );
} finally {
$this->assertNull( $this->tracerState->getActiveSpanContext() );
}
}
public function testShouldRejectDeactivatingSpanWhenItIsNotActive(): void {
$this->expectException( InvariantException::class );
$this->expectExceptionMessage( 'Attempted to deactivate a span which is not the active span.' );
$activeSpanContext = new SpanContext(
'',
str_repeat( 'a', 16 ),
null,
'',
true
);
$this->tracerState->activateSpan( $activeSpanContext );
try {
$otherSpanContext = new SpanContext(
'',
str_repeat( 'b', 16 ),
null,
'',
true
);
$this->tracerState->deactivateSpan( $otherSpanContext );
} finally {
$this->assertSame( $activeSpanContext, $this->tracerState->getActiveSpanContext() );
}
}
public function testShouldAddAndReturnSpans(): void {
$firstSpanContext = new SpanContext(
'',
str_repeat( 'a', 16 ),
null,
'',
true
);
$secondSpanContext = new SpanContext(
'',
str_repeat( 'b', 16 ),
null,
'',
true
);
$this->tracerState->addSpanContext( $firstSpanContext );
$this->tracerState->addSpanContext( $secondSpanContext );
$this->assertSame( [ $firstSpanContext, $secondSpanContext ], $this->tracerState->getSpanContexts() );
$this->tracerState->clearSpanContexts();
$this->assertSame( [], $this->tracerState->getSpanContexts() );
}
}
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