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[EDIT] FILE: TestCaseMethod.tpl

<?php declare(strict_types=1);
use PHPUnit\Event\Facade;
use PHPUnit\Runner\CodeCoverage;
use PHPUnit\TextUI\Configuration\Registry as ConfigurationRegistry;
use PHPUnit\TextUI\Configuration\CodeCoverageFilterRegistry;
use PHPUnit\TextUI\Configuration\PhpHandler;
use PHPUnit\TestRunner\TestResult\PassedTests;

// php://stdout does not obey output buffering. Any output would break
// unserialization of child process results in the parent process.
if (!defined('STDOUT')) {
    define('STDOUT', fopen('php://temp', 'w+b'));
    define('STDERR', fopen('php://stderr', 'wb'));
}

{iniSettings}
ini_set('display_errors', 'stderr');
set_include_path('{include_path}');

$composerAutoload = {composerAutoload};
$phar             = {phar};

ob_start();

if ($composerAutoload) {
    require_once $composerAutoload;

define('PHPUNIT_COMPOSER_INSTALL', $composerAutoload);
} else if ($phar) {
    require $phar;
}

function __phpunit_run_isolated_test()
{
    $dispatcher = Facade::instance()->initForIsolation(
        PHPUnit\Event\Telemetry\HRTime::fromSecondsAndNanoseconds(
            {offsetSeconds},
            {offsetNanoseconds}
        ),
        {exportObjects},
    );

require_once '{filename}';

if ({collectCodeCoverageInformation}) {
        CodeCoverage::instance()->init(ConfigurationRegistry::get(), CodeCoverageFilterRegistry::instance(), true);
        CodeCoverage::instance()->ignoreLines({linesToBeIgnored});
    }

$test = new {className}('{methodName}');

$test->setData('{dataName}', unserialize('{data}'));
    $test->setDependencyInput(unserialize('{dependencyInput}'));
    $test->setInIsolation(true);

ob_end_clean();

$test->run();

$output = '';

if (!$test->expectsOutput()) {
        $output = $test->output();
    }

ini_set('xdebug.scream', '0');

// Not every STDOUT target stream is rewindable
    @rewind(STDOUT);

if ($stdout = @stream_get_contents(STDOUT)) {
        $output         = $stdout . $output;
        $streamMetaData = stream_get_meta_data(STDOUT);

if (!empty($streamMetaData['stream_type']) && 'STDIO' === $streamMetaData['stream_type']) {
            @ftruncate(STDOUT, 0);
            @rewind(STDOUT);
        }
    }

file_put_contents(
        '{processResultFile}',
        serialize(
            [
                'testResult'    => $test->result(),
                'codeCoverage'  => {collectCodeCoverageInformation} ? CodeCoverage::instance()->codeCoverage() : null,
                'numAssertions' => $test->numberOfAssertionsPerformed(),
                'output'        => $output,
                'events'        => $dispatcher->flush(),
                'passedTests'   => PassedTests::instance()
            ]
        )
    );
}

function __phpunit_error_handler($errno, $errstr, $errfile, $errline)
{
   return true;
}

set_error_handler('__phpunit_error_handler');

{constants}
{included_files}
{globals}

restore_error_handler();

ConfigurationRegistry::loadFrom('{serializedConfiguration}');
(new PhpHandler)->handle(ConfigurationRegistry::get()->php());

if ('{bootstrap}' !== '') {
    require_once '{bootstrap}';
}

__phpunit_run_isolated_test();

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