Cassandra\UuidTest::testUniqueInChild PHP 메소드

    public function testUniqueInChild()
    {
        if (!function_exists("pcntl_fork")) {
            $this->markTestSkipped("Unable to Execute testUniqueInChild Unit Test: pcntl_fork() does not exists");
        } else {
            // Create a PHP script to call within a PHPUnit test (exit call fails test)
            $script = <<<EOF
<?php
// Get and open the file for appending child UUIDs
\$uuidsFilename = \$_SERVER['argv'][1];
\$numberOfForks = \$_SERVER['argv'][2];

// Create requested children process; create UUIDs and append to a file
\$children = array();
foreach (range(1, \$numberOfForks) as \$i) {
    // Create the child process
    \$pid = pcntl_fork();

    // Ensure the child process was create successfully
    if (\$pid < 0) {
        die("Unable to Create Fork: Unique UUID test cannot complete");
    } else if (\$pid === 0) {
        // Create a UUID and add it to the file
        \$uuid = new \\Cassandra\\Uuid();
        file_put_contents(\$uuidsFilename, \$uuid->uuid() . PHP_EOL, FILE_APPEND);

        // Terminate child process
        exit(0);
    } else {
        // Parent process: Add the process ID to force waiting on children
        \$children[] = \$pid;
    }
}

// Wait on each child process to finish
foreach (\$children as \$pid) {
    pcntl_waitpid(\$pid, \$status);
}
?>
EOF;
            $numProcesses = 64;
            // Execute the PHP script passing in the filename for the UUIDs to be stored
            $uuidsFilename = tempnam(sys_get_temp_dir(), "uuid");
            $scriptFilename = tempnam(sys_get_temp_dir(), "uuid");
            file_put_contents($scriptFilename, $script, FILE_APPEND);
            exec(PHP_BINARY . " {$scriptFilename} {$uuidsFilename} {$numProcesses}");
            unlink($scriptFilename);
            // Get the contents of the file
            $uuids = file($uuidsFilename);
            unlink($uuidsFilename);
            // Ensure all the UUIDs are unique
            $this->assertEquals($numProcesses, count(array_unique($uuids)));
        }
    }