LoggerDataCollector example

class LoggerDataCollectorTest extends TestCase
{
    public function testCollectWithUnexpectedFormat()
    {
        $logger = $this
            ->getMockBuilder(DebugLoggerInterface::class)
            ->onlyMethods(['countErrors', 'getLogs', 'clear'])
            ->getMock();
        $logger->expects($this->once())->method('countErrors')->willReturn(123);
        $logger->expects($this->exactly(2))->method('getLogs')->willReturn([]);

        $c = new LoggerDataCollector($logger, __DIR__.'/');
        $c->lateCollect();
        $compilerLogs = $c->getCompilerLogs()->getValue('message');

        $this->assertSame([
            ['message' => 'Removed service "Psr\Container\ContainerInterface"; reason: private alias.'],
            ['message' => 'Removed service "Symfony\Component\DependencyInjection\ContainerInterface"; reason: private alias.'],
        ], $compilerLogs['Symfony\Component\DependencyInjection\Compiler\RemovePrivateAliasesPass']);

        $this->assertSame([
            ['message' => 'Some custom logging message'],
            ['message' => 'With ending :'],
        ],