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diff --git a/vendor/symfony/process/Tests/ProcessTest.php b/vendor/symfony/process/Tests/ProcessTest.php
new file mode 100644
index 000000000..e034aeb28
--- /dev/null
+++ b/vendor/symfony/process/Tests/ProcessTest.php
@@ -0,0 +1,1288 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\Process\Tests;
+
+use PHPUnit\Framework\TestCase;
+use Symfony\Component\Process\Exception\LogicException;
+use Symfony\Component\Process\Exception\ProcessTimedOutException;
+use Symfony\Component\Process\Exception\RuntimeException;
+use Symfony\Component\Process\PhpExecutableFinder;
+use Symfony\Component\Process\Pipes\PipesInterface;
+use Symfony\Component\Process\Process;
+
+/**
+ * @author Robert Schönthal <seroscho@googlemail.com>
+ */
+class ProcessTest extends TestCase
+{
+    private static $phpBin;
+    private static $process;
+    private static $sigchild;
+    private static $notEnhancedSigchild = false;
+
+    public static function setUpBeforeClass()
+    {
+        $phpBin = new PhpExecutableFinder();
+        self::$phpBin = getenv('SYMFONY_PROCESS_PHP_TEST_BINARY') ?: ('phpdbg' === PHP_SAPI ? 'php' : $phpBin->find());
+        if ('\\' !== DIRECTORY_SEPARATOR) {
+            // exec is mandatory to deal with sending a signal to the process
+            // see https://github.com/symfony/symfony/issues/5030 about prepending
+            // command with exec
+            self::$phpBin = 'exec '.self::$phpBin;
+        }
+
+        ob_start();
+        phpinfo(INFO_GENERAL);
+        self::$sigchild = false !== strpos(ob_get_clean(), '--enable-sigchild');
+    }
+
+    protected function tearDown()
+    {
+        if (self::$process) {
+            self::$process->stop(0);
+            self::$process = null;
+        }
+    }
+
+    public function testThatProcessDoesNotThrowWarningDuringRun()
+    {
+        if ('\\' === DIRECTORY_SEPARATOR) {
+            $this->markTestSkipped('This test is transient on Windows');
+        }
+        @trigger_error('Test Error', E_USER_NOTICE);
+        $process = $this->getProcess(self::$phpBin." -r 'sleep(3)'");
+        $process->run();
+        $actualError = error_get_last();
+        $this->assertEquals('Test Error', $actualError['message']);
+        $this->assertEquals(E_USER_NOTICE, $actualError['type']);
+    }
+
+    /**
+     * @expectedException \Symfony\Component\Process\Exception\InvalidArgumentException
+     */
+    public function testNegativeTimeoutFromConstructor()
+    {
+        $this->getProcess('', null, null, null, -1);
+    }
+
+    /**
+     * @expectedException \Symfony\Component\Process\Exception\InvalidArgumentException
+     */
+    public function testNegativeTimeoutFromSetter()
+    {
+        $p = $this->getProcess('');
+        $p->setTimeout(-1);
+    }
+
+    public function testFloatAndNullTimeout()
+    {
+        $p = $this->getProcess('');
+
+        $p->setTimeout(10);
+        $this->assertSame(10.0, $p->getTimeout());
+
+        $p->setTimeout(null);
+        $this->assertNull($p->getTimeout());
+
+        $p->setTimeout(0.0);
+        $this->assertNull($p->getTimeout());
+    }
+
+    /**
+     * @requires extension pcntl
+     */
+    public function testStopWithTimeoutIsActuallyWorking()
+    {
+        $p = $this->getProcess(self::$phpBin.' '.__DIR__.'/NonStopableProcess.php 30');
+        $p->start();
+
+        while (false === strpos($p->getOutput(), 'received')) {
+            usleep(1000);
+        }
+        $start = microtime(true);
+        $p->stop(0.1);
+
+        $p->wait();
+
+        $this->assertLessThan(15, microtime(true) - $start);
+    }
+
+    public function testAllOutputIsActuallyReadOnTermination()
+    {
+        // this code will result in a maximum of 2 reads of 8192 bytes by calling
+        // start() and isRunning().  by the time getOutput() is called the process
+        // has terminated so the internal pipes array is already empty. normally
+        // the call to start() will not read any data as the process will not have
+        // generated output, but this is non-deterministic so we must count it as
+        // a possibility.  therefore we need 2 * PipesInterface::CHUNK_SIZE plus
+        // another byte which will never be read.
+        $expectedOutputSize = PipesInterface::CHUNK_SIZE * 2 + 2;
+
+        $code = sprintf('echo str_repeat(\'*\', %d);', $expectedOutputSize);
+        $p = $this->getProcess(sprintf('%s -r %s', self::$phpBin, escapeshellarg($code)));
+
+        $p->start();
+
+        // Don't call Process::run nor Process::wait to avoid any read of pipes
+        $h = new \ReflectionProperty($p, 'process');
+        $h->setAccessible(true);
+        $h = $h->getValue($p);
+        $s = @proc_get_status($h);
+
+        while (!empty($s['running'])) {
+            usleep(1000);
+            $s = proc_get_status($h);
+        }
+
+        $o = $p->getOutput();
+
+        $this->assertEquals($expectedOutputSize, strlen($o));
+    }
+
+    public function testCallbacksAreExecutedWithStart()
+    {
+        $process = $this->getProcess('echo foo');
+        $process->start(function ($type, $buffer) use (&$data) {
+            $data .= $buffer;
+        });
+
+        $process->wait();
+
+        $this->assertSame('foo'.PHP_EOL, $data);
+    }
+
+    /**
+     * tests results from sub processes.
+     *
+     * @dataProvider responsesCodeProvider
+     */
+    public function testProcessResponses($expected, $getter, $code)
+    {
+        $p = $this->getProcess(sprintf('%s -r %s', self::$phpBin, escapeshellarg($code)));
+        $p->run();
+
+        $this->assertSame($expected, $p->$getter());
+    }
+
+    /**
+     * tests results from sub processes.
+     *
+     * @dataProvider pipesCodeProvider
+     */
+    public function testProcessPipes($code, $size)
+    {
+        $expected = str_repeat(str_repeat('*', 1024), $size).'!';
+        $expectedLength = (1024 * $size) + 1;
+
+        $p = $this->getProcess(sprintf('%s -r %s', self::$phpBin, escapeshellarg($code)));
+        $p->setInput($expected);
+        $p->run();
+
+        $this->assertEquals($expectedLength, strlen($p->getOutput()));
+        $this->assertEquals($expectedLength, strlen($p->getErrorOutput()));
+    }
+
+    /**
+     * @dataProvider pipesCodeProvider
+     */
+    public function testSetStreamAsInput($code, $size)
+    {
+        $expected = str_repeat(str_repeat('*', 1024), $size).'!';
+        $expectedLength = (1024 * $size) + 1;
+
+        $stream = fopen('php://temporary', 'w+');
+        fwrite($stream, $expected);
+        rewind($stream);
+
+        $p = $this->getProcess(sprintf('%s -r %s', self::$phpBin, escapeshellarg($code)));
+        $p->setInput($stream);
+        $p->run();
+
+        fclose($stream);
+
+        $this->assertEquals($expectedLength, strlen($p->getOutput()));
+        $this->assertEquals($expectedLength, strlen($p->getErrorOutput()));
+    }
+
+    public function testLiveStreamAsInput()
+    {
+        $stream = fopen('php://memory', 'r+');
+        fwrite($stream, 'hello');
+        rewind($stream);
+
+        $p = $this->getProcess(sprintf('%s -r %s', self::$phpBin, escapeshellarg('stream_copy_to_stream(STDIN, STDOUT);')));
+        $p->setInput($stream);
+        $p->start(function ($type, $data) use ($stream) {
+            if ('hello' === $data) {
+                fclose($stream);
+            }
+        });
+        $p->wait();
+
+        $this->assertSame('hello', $p->getOutput());
+    }
+
+    /**
+     * @expectedException \Symfony\Component\Process\Exception\LogicException
+     * @expectedExceptionMessage Input can not be set while the process is running.
+     */
+    public function testSetInputWhileRunningThrowsAnException()
+    {
+        $process = $this->getProcess(self::$phpBin.' -r "sleep(30);"');
+        $process->start();
+        try {
+            $process->setInput('foobar');
+            $process->stop();
+            $this->fail('A LogicException should have been raised.');
+        } catch (LogicException $e) {
+        }
+        $process->stop();
+
+        throw $e;
+    }
+
+    /**
+     * @dataProvider provideInvalidInputValues
+     * @expectedException \Symfony\Component\Process\Exception\InvalidArgumentException
+     * @expectedExceptionMessage Symfony\Component\Process\Process::setInput only accepts strings or stream resources.
+     */
+    public function testInvalidInput($value)
+    {
+        $process = $this->getProcess('foo');
+        $process->setInput($value);
+    }
+
+    public function provideInvalidInputValues()
+    {
+        return array(
+            array(array()),
+            array(new NonStringifiable()),
+        );
+    }
+
+    /**
+     * @dataProvider provideInputValues
+     */
+    public function testValidInput($expected, $value)
+    {
+        $process = $this->getProcess('foo');
+        $process->setInput($value);
+        $this->assertSame($expected, $process->getInput());
+    }
+
+    public function provideInputValues()
+    {
+        return array(
+            array(null, null),
+            array('24.5', 24.5),
+            array('input data', 'input data'),
+        );
+    }
+
+    /**
+     * @dataProvider provideLegacyInputValues
+     * @group legacy
+     */
+    public function testLegacyValidInput($expected, $value)
+    {
+        $process = $this->getProcess(self::$phpBin.' -v');
+        $process->setInput($value);
+        $this->assertSame($expected, $process->getInput());
+    }
+
+    public function provideLegacyInputValues()
+    {
+        return array(
+            array('stringifiable', new Stringifiable()),
+        );
+    }
+
+    public function chainedCommandsOutputProvider()
+    {
+        if ('\\' === DIRECTORY_SEPARATOR) {
+            return array(
+                array("2 \r\n2\r\n", '&&', '2'),
+            );
+        }
+
+        return array(
+            array("1\n1\n", ';', '1'),
+            array("2\n2\n", '&&', '2'),
+        );
+    }
+
+    /**
+     * @dataProvider chainedCommandsOutputProvider
+     */
+    public function testChainedCommandsOutput($expected, $operator, $input)
+    {
+        $process = $this->getProcess(sprintf('echo %s %s echo %s', $input, $operator, $input));
+        $process->run();
+        $this->assertEquals($expected, $process->getOutput());
+    }
+
+    public function testCallbackIsExecutedForOutput()
+    {
+        $p = $this->getProcess(sprintf('%s -r %s', self::$phpBin, escapeshellarg('echo \'foo\';')));
+
+        $called = false;
+        $p->run(function ($type, $buffer) use (&$called) {
+            $called = $buffer === 'foo';
+        });
+
+        $this->assertTrue($called, 'The callback should be executed with the output');
+    }
+
+    public function testGetErrorOutput()
+    {
+        $p = $this->getProcess(sprintf('%s -r %s', self::$phpBin, escapeshellarg('$n = 0; while ($n < 3) { file_put_contents(\'php://stderr\', \'ERROR\'); $n++; }')));
+
+        $p->run();
+        $this->assertEquals(3, preg_match_all('/ERROR/', $p->getErrorOutput(), $matches));
+    }
+
+    public function testFlushErrorOutput()
+    {
+        $p = $this->getProcess(sprintf('%s -r %s', self::$phpBin, escapeshellarg('$n = 0; while ($n < 3) { file_put_contents(\'php://stderr\', \'ERROR\'); $n++; }')));
+
+        $p->run();
+        $p->clearErrorOutput();
+        $this->assertEmpty($p->getErrorOutput());
+    }
+
+    /**
+     * @dataProvider provideIncrementalOutput
+     */
+    public function testIncrementalOutput($getOutput, $getIncrementalOutput, $uri)
+    {
+        $lock = tempnam(sys_get_temp_dir(), __FUNCTION__);
+
+        $p = $this->getProcess(sprintf('%s -r %s', self::$phpBin, escapeshellarg('file_put_contents($s = \''.$uri.'\', \'foo\'); flock(fopen('.var_export($lock, true).', \'r\'), LOCK_EX); file_put_contents($s, \'bar\');')));
+
+        $h = fopen($lock, 'w');
+        flock($h, LOCK_EX);
+
+        $p->start();
+
+        foreach (array('foo', 'bar') as $s) {
+            while (false === strpos($p->$getOutput(), $s)) {
+                usleep(1000);
+            }
+
+            $this->assertSame($s, $p->$getIncrementalOutput());
+            $this->assertSame('', $p->$getIncrementalOutput());
+
+            flock($h, LOCK_UN);
+        }
+
+        fclose($h);
+    }
+
+    public function provideIncrementalOutput()
+    {
+        return array(
+            array('getOutput', 'getIncrementalOutput', 'php://stdout'),
+            array('getErrorOutput', 'getIncrementalErrorOutput', 'php://stderr'),
+        );
+    }
+
+    public function testGetOutput()
+    {
+        $p = $this->getProcess(sprintf('%s -r %s', self::$phpBin, escapeshellarg('$n = 0; while ($n < 3) { echo \' foo \'; $n++; }')));
+
+        $p->run();
+        $this->assertEquals(3, preg_match_all('/foo/', $p->getOutput(), $matches));
+    }
+
+    public function testFlushOutput()
+    {
+        $p = $this->getProcess(sprintf('%s -r %s', self::$phpBin, escapeshellarg('$n=0;while ($n<3) {echo \' foo \';$n++;}')));
+
+        $p->run();
+        $p->clearOutput();
+        $this->assertEmpty($p->getOutput());
+    }
+
+    public function testZeroAsOutput()
+    {
+        if ('\\' === DIRECTORY_SEPARATOR) {
+            // see http://stackoverflow.com/questions/7105433/windows-batch-echo-without-new-line
+            $p = $this->getProcess('echo | set /p dummyName=0');
+        } else {
+            $p = $this->getProcess('printf 0');
+        }
+
+        $p->run();
+        $this->assertSame('0', $p->getOutput());
+    }
+
+    public function testExitCodeCommandFailed()
+    {
+        if ('\\' === DIRECTORY_SEPARATOR) {
+            $this->markTestSkipped('Windows does not support POSIX exit code');
+        }
+        $this->skipIfNotEnhancedSigchild();
+
+        // such command run in bash return an exitcode 127
+        $process = $this->getProcess('nonexistingcommandIhopeneversomeonewouldnameacommandlikethis');
+        $process->run();
+
+        $this->assertGreaterThan(0, $process->getExitCode());
+    }
+
+    public function testTTYCommand()
+    {
+        if ('\\' === DIRECTORY_SEPARATOR) {
+            $this->markTestSkipped('Windows does not have /dev/tty support');
+        }
+
+        $process = $this->getProcess('echo "foo" >> /dev/null && '.self::$phpBin.' -r "usleep(100000);"');
+        $process->setTty(true);
+        $process->start();
+        $this->assertTrue($process->isRunning());
+        $process->wait();
+
+        $this->assertSame(Process::STATUS_TERMINATED, $process->getStatus());
+    }
+
+    public function testTTYCommandExitCode()
+    {
+        if ('\\' === DIRECTORY_SEPARATOR) {
+            $this->markTestSkipped('Windows does have /dev/tty support');
+        }
+        $this->skipIfNotEnhancedSigchild();
+
+        $process = $this->getProcess('echo "foo" >> /dev/null');
+        $process->setTty(true);
+        $process->run();
+
+        $this->assertTrue($process->isSuccessful());
+    }
+
+    /**
+     * @expectedException \Symfony\Component\Process\Exception\RuntimeException
+     * @expectedExceptionMessage TTY mode is not supported on Windows platform.
+     */
+    public function testTTYInWindowsEnvironment()
+    {
+        if ('\\' !== DIRECTORY_SEPARATOR) {
+            $this->markTestSkipped('This test is for Windows platform only');
+        }
+
+        $process = $this->getProcess('echo "foo" >> /dev/null');
+        $process->setTty(false);
+        $process->setTty(true);
+    }
+
+    public function testExitCodeTextIsNullWhenExitCodeIsNull()
+    {
+        $this->skipIfNotEnhancedSigchild();
+
+        $process = $this->getProcess('');
+        $this->assertNull($process->getExitCodeText());
+    }
+
+    public function testPTYCommand()
+    {
+        if (!Process::isPtySupported()) {
+            $this->markTestSkipped('PTY is not supported on this operating system.');
+        }
+
+        $process = $this->getProcess('echo "foo"');
+        $process->setPty(true);
+        $process->run();
+
+        $this->assertSame(Process::STATUS_TERMINATED, $process->getStatus());
+        $this->assertEquals("foo\r\n", $process->getOutput());
+    }
+
+    public function testMustRun()
+    {
+        $this->skipIfNotEnhancedSigchild();
+
+        $process = $this->getProcess('echo foo');
+
+        $this->assertSame($process, $process->mustRun());
+        $this->assertEquals('foo'.PHP_EOL, $process->getOutput());
+    }
+
+    public function testSuccessfulMustRunHasCorrectExitCode()
+    {
+        $this->skipIfNotEnhancedSigchild();
+
+        $process = $this->getProcess('echo foo')->mustRun();
+        $this->assertEquals(0, $process->getExitCode());
+    }
+
+    /**
+     * @expectedException \Symfony\Component\Process\Exception\ProcessFailedException
+     */
+    public function testMustRunThrowsException()
+    {
+        $this->skipIfNotEnhancedSigchild();
+
+        $process = $this->getProcess('exit 1');
+        $process->mustRun();
+    }
+
+    public function testExitCodeText()
+    {
+        $this->skipIfNotEnhancedSigchild();
+
+        $process = $this->getProcess('');
+        $r = new \ReflectionObject($process);
+        $p = $r->getProperty('exitcode');
+        $p->setAccessible(true);
+
+        $p->setValue($process, 2);
+        $this->assertEquals('Misuse of shell builtins', $process->getExitCodeText());
+    }
+
+    public function testStartIsNonBlocking()
+    {
+        $process = $this->getProcess(self::$phpBin.' -r "usleep(500000);"');
+        $start = microtime(true);
+        $process->start();
+        $end = microtime(true);
+        $this->assertLessThan(0.4, $end - $start);
+        $process->stop();
+    }
+
+    public function testUpdateStatus()
+    {
+        $process = $this->getProcess('echo foo');
+        $process->run();
+        $this->assertTrue(strlen($process->getOutput()) > 0);
+    }
+
+    public function testGetExitCodeIsNullOnStart()
+    {
+        $this->skipIfNotEnhancedSigchild();
+
+        $process = $this->getProcess(self::$phpBin.' -r "usleep(100000);"');
+        $this->assertNull($process->getExitCode());
+        $process->start();
+        $this->assertNull($process->getExitCode());
+        $process->wait();
+        $this->assertEquals(0, $process->getExitCode());
+    }
+
+    public function testGetExitCodeIsNullOnWhenStartingAgain()
+    {
+        $this->skipIfNotEnhancedSigchild();
+
+        $process = $this->getProcess(self::$phpBin.' -r "usleep(100000);"');
+        $process->run();
+        $this->assertEquals(0, $process->getExitCode());
+        $process->start();
+        $this->assertNull($process->getExitCode());
+        $process->wait();
+        $this->assertEquals(0, $process->getExitCode());
+    }
+
+    public function testGetExitCode()
+    {
+        $this->skipIfNotEnhancedSigchild();
+
+        $process = $this->getProcess('echo foo');
+        $process->run();
+        $this->assertSame(0, $process->getExitCode());
+    }
+
+    public function testStatus()
+    {
+        $process = $this->getProcess(self::$phpBin.' -r "usleep(100000);"');
+        $this->assertFalse($process->isRunning());
+        $this->assertFalse($process->isStarted());
+        $this->assertFalse($process->isTerminated());
+        $this->assertSame(Process::STATUS_READY, $process->getStatus());
+        $process->start();
+        $this->assertTrue($process->isRunning());
+        $this->assertTrue($process->isStarted());
+        $this->assertFalse($process->isTerminated());
+        $this->assertSame(Process::STATUS_STARTED, $process->getStatus());
+        $process->wait();
+        $this->assertFalse($process->isRunning());
+        $this->assertTrue($process->isStarted());
+        $this->assertTrue($process->isTerminated());
+        $this->assertSame(Process::STATUS_TERMINATED, $process->getStatus());
+    }
+
+    public function testStop()
+    {
+        $process = $this->getProcess(self::$phpBin.' -r "sleep(31);"');
+        $process->start();
+        $this->assertTrue($process->isRunning());
+        $process->stop();
+        $this->assertFalse($process->isRunning());
+    }
+
+    public function testIsSuccessful()
+    {
+        $this->skipIfNotEnhancedSigchild();
+
+        $process = $this->getProcess('echo foo');
+        $process->run();
+        $this->assertTrue($process->isSuccessful());
+    }
+
+    public function testIsSuccessfulOnlyAfterTerminated()
+    {
+        $this->skipIfNotEnhancedSigchild();
+
+        $process = $this->getProcess(self::$phpBin.' -r "usleep(100000);"');
+        $process->start();
+
+        $this->assertFalse($process->isSuccessful());
+
+        $process->wait();
+
+        $this->assertTrue($process->isSuccessful());
+    }
+
+    public function testIsNotSuccessful()
+    {
+        $this->skipIfNotEnhancedSigchild();
+
+        $process = $this->getProcess(self::$phpBin.' -r "throw new \Exception(\'BOUM\');"');
+        $process->run();
+        $this->assertFalse($process->isSuccessful());
+    }
+
+    public function testProcessIsNotSignaled()
+    {
+        if ('\\' === DIRECTORY_SEPARATOR) {
+            $this->markTestSkipped('Windows does not support POSIX signals');
+        }
+        $this->skipIfNotEnhancedSigchild();
+
+        $process = $this->getProcess('echo foo');
+        $process->run();
+        $this->assertFalse($process->hasBeenSignaled());
+    }
+
+    public function testProcessWithoutTermSignal()
+    {
+        if ('\\' === DIRECTORY_SEPARATOR) {
+            $this->markTestSkipped('Windows does not support POSIX signals');
+        }
+        $this->skipIfNotEnhancedSigchild();
+
+        $process = $this->getProcess('echo foo');
+        $process->run();
+        $this->assertEquals(0, $process->getTermSignal());
+    }
+
+    public function testProcessIsSignaledIfStopped()
+    {
+        if ('\\' === DIRECTORY_SEPARATOR) {
+            $this->markTestSkipped('Windows does not support POSIX signals');
+        }
+        $this->skipIfNotEnhancedSigchild();
+
+        $process = $this->getProcess(self::$phpBin.' -r "sleep(32);"');
+        $process->start();
+        $process->stop();
+        $this->assertTrue($process->hasBeenSignaled());
+        $this->assertEquals(15, $process->getTermSignal()); // SIGTERM
+    }
+
+    /**
+     * @expectedException \Symfony\Component\Process\Exception\RuntimeException
+     * @expectedExceptionMessage The process has been signaled
+     */
+    public function testProcessThrowsExceptionWhenExternallySignaled()
+    {
+        if (!function_exists('posix_kill')) {
+            $this->markTestSkipped('Function posix_kill is required.');
+        }
+        $this->skipIfNotEnhancedSigchild(false);
+
+        $process = $this->getProcess(self::$phpBin.' -r "sleep(32.1)"');
+        $process->start();
+        posix_kill($process->getPid(), 9); // SIGKILL
+
+        $process->wait();
+    }
+
+    public function testRestart()
+    {
+        $process1 = $this->getProcess(self::$phpBin.' -r "echo getmypid();"');
+        $process1->run();
+        $process2 = $process1->restart();
+
+        $process2->wait(); // wait for output
+
+        // Ensure that both processed finished and the output is numeric
+        $this->assertFalse($process1->isRunning());
+        $this->assertFalse($process2->isRunning());
+        $this->assertTrue(is_numeric($process1->getOutput()));
+        $this->assertTrue(is_numeric($process2->getOutput()));
+
+        // Ensure that restart returned a new process by check that the output is different
+        $this->assertNotEquals($process1->getOutput(), $process2->getOutput());
+    }
+
+    /**
+     * @expectedException \Symfony\Component\Process\Exception\ProcessTimedOutException
+     * @expectedExceptionMessage exceeded the timeout of 0.1 seconds.
+     */
+    public function testRunProcessWithTimeout()
+    {
+        $process = $this->getProcess(self::$phpBin.' -r "sleep(30);"');
+        $process->setTimeout(0.1);
+        $start = microtime(true);
+        try {
+            $process->run();
+            $this->fail('A RuntimeException should have been raised');
+        } catch (RuntimeException $e) {
+        }
+
+        $this->assertLessThan(15, microtime(true) - $start);
+
+        throw $e;
+    }
+
+    public function testCheckTimeoutOnNonStartedProcess()
+    {
+        $process = $this->getProcess('echo foo');
+        $this->assertNull($process->checkTimeout());
+    }
+
+    public function testCheckTimeoutOnTerminatedProcess()
+    {
+        $process = $this->getProcess('echo foo');
+        $process->run();
+        $this->assertNull($process->checkTimeout());
+    }
+
+    /**
+     * @expectedException \Symfony\Component\Process\Exception\ProcessTimedOutException
+     * @expectedExceptionMessage exceeded the timeout of 0.1 seconds.
+     */
+    public function testCheckTimeoutOnStartedProcess()
+    {
+        $process = $this->getProcess(self::$phpBin.' -r "sleep(33);"');
+        $process->setTimeout(0.1);
+
+        $process->start();
+        $start = microtime(true);
+
+        try {
+            while ($process->isRunning()) {
+                $process->checkTimeout();
+                usleep(100000);
+            }
+            $this->fail('A ProcessTimedOutException should have been raised');
+        } catch (ProcessTimedOutException $e) {
+        }
+
+        $this->assertLessThan(15, microtime(true) - $start);
+
+        throw $e;
+    }
+
+    public function testIdleTimeout()
+    {
+        $process = $this->getProcess(self::$phpBin.' -r "sleep(34);"');
+        $process->setTimeout(60);
+        $process->setIdleTimeout(0.1);
+
+        try {
+            $process->run();
+
+            $this->fail('A timeout exception was expected.');
+        } catch (ProcessTimedOutException $e) {
+            $this->assertTrue($e->isIdleTimeout());
+            $this->assertFalse($e->isGeneralTimeout());
+            $this->assertEquals(0.1, $e->getExceededTimeout());
+        }
+    }
+
+    public function testIdleTimeoutNotExceededWhenOutputIsSent()
+    {
+        $process = $this->getProcess(sprintf('%s -r %s', self::$phpBin, escapeshellarg('while (true) {echo \'foo \'; usleep(1000);}')));
+        $process->setTimeout(1);
+        $process->start();
+
+        while (false === strpos($process->getOutput(), 'foo')) {
+            usleep(1000);
+        }
+
+        $process->setIdleTimeout(0.5);
+
+        try {
+            $process->wait();
+            $this->fail('A timeout exception was expected.');
+        } catch (ProcessTimedOutException $e) {
+            $this->assertTrue($e->isGeneralTimeout(), 'A general timeout is expected.');
+            $this->assertFalse($e->isIdleTimeout(), 'No idle timeout is expected.');
+            $this->assertEquals(1, $e->getExceededTimeout());
+        }
+    }
+
+    /**
+     * @expectedException \Symfony\Component\Process\Exception\ProcessTimedOutException
+     * @expectedExceptionMessage exceeded the timeout of 0.1 seconds.
+     */
+    public function testStartAfterATimeout()
+    {
+        $process = $this->getProcess(self::$phpBin.' -r "sleep(35);"');
+        $process->setTimeout(0.1);
+
+        try {
+            $process->run();
+            $this->fail('A ProcessTimedOutException should have been raised.');
+        } catch (ProcessTimedOutException $e) {
+        }
+        $this->assertFalse($process->isRunning());
+        $process->start();
+        $this->assertTrue($process->isRunning());
+        $process->stop(0);
+
+        throw $e;
+    }
+
+    public function testGetPid()
+    {
+        $process = $this->getProcess(self::$phpBin.' -r "sleep(36);"');
+        $process->start();
+        $this->assertGreaterThan(0, $process->getPid());
+        $process->stop(0);
+    }
+
+    public function testGetPidIsNullBeforeStart()
+    {
+        $process = $this->getProcess('foo');
+        $this->assertNull($process->getPid());
+    }
+
+    public function testGetPidIsNullAfterRun()
+    {
+        $process = $this->getProcess('echo foo');
+        $process->run();
+        $this->assertNull($process->getPid());
+    }
+
+    /**
+     * @requires extension pcntl
+     */
+    public function testSignal()
+    {
+        $process = $this->getProcess(self::$phpBin.' '.__DIR__.'/SignalListener.php');
+        $process->start();
+
+        while (false === strpos($process->getOutput(), 'Caught')) {
+            usleep(1000);
+        }
+        $process->signal(SIGUSR1);
+        $process->wait();
+
+        $this->assertEquals('Caught SIGUSR1', $process->getOutput());
+    }
+
+    /**
+     * @requires extension pcntl
+     */
+    public function testExitCodeIsAvailableAfterSignal()
+    {
+        $this->skipIfNotEnhancedSigchild();
+
+        $process = $this->getProcess('sleep 4');
+        $process->start();
+        $process->signal(SIGKILL);
+
+        while ($process->isRunning()) {
+            usleep(10000);
+        }
+
+        $this->assertFalse($process->isRunning());
+        $this->assertTrue($process->hasBeenSignaled());
+        $this->assertFalse($process->isSuccessful());
+        $this->assertEquals(137, $process->getExitCode());
+    }
+
+    /**
+     * @expectedException \Symfony\Component\Process\Exception\LogicException
+     * @expectedExceptionMessage Can not send signal on a non running process.
+     */
+    public function testSignalProcessNotRunning()
+    {
+        $process = $this->getProcess('foo');
+        $process->signal(1); // SIGHUP
+    }
+
+    /**
+     * @dataProvider provideMethodsThatNeedARunningProcess
+     */
+    public function testMethodsThatNeedARunningProcess($method)
+    {
+        $process = $this->getProcess('foo');
+
+        if (method_exists($this, 'expectException')) {
+            $this->expectException('Symfony\Component\Process\Exception\LogicException');
+            $this->expectExceptionMessage(sprintf('Process must be started before calling %s.', $method));
+        } else {
+            $this->setExpectedException('Symfony\Component\Process\Exception\LogicException', sprintf('Process must be started before calling %s.', $method));
+        }
+
+        $process->{$method}();
+    }
+
+    public function provideMethodsThatNeedARunningProcess()
+    {
+        return array(
+            array('getOutput'),
+            array('getIncrementalOutput'),
+            array('getErrorOutput'),
+            array('getIncrementalErrorOutput'),
+            array('wait'),
+        );
+    }
+
+    /**
+     * @dataProvider provideMethodsThatNeedATerminatedProcess
+     * @expectedException \Symfony\Component\Process\Exception\LogicException
+     * @expectedExceptionMessage Process must be terminated before calling
+     */
+    public function testMethodsThatNeedATerminatedProcess($method)
+    {
+        $process = $this->getProcess(self::$phpBin.' -r "sleep(37);"');
+        $process->start();
+        try {
+            $process->{$method}();
+            $process->stop(0);
+            $this->fail('A LogicException must have been thrown');
+        } catch (\Exception $e) {
+        }
+        $process->stop(0);
+
+        throw $e;
+    }
+
+    public function provideMethodsThatNeedATerminatedProcess()
+    {
+        return array(
+            array('hasBeenSignaled'),
+            array('getTermSignal'),
+            array('hasBeenStopped'),
+            array('getStopSignal'),
+        );
+    }
+
+    /**
+     * @dataProvider provideWrongSignal
+     * @expectedException \Symfony\Component\Process\Exception\RuntimeException
+     */
+    public function testWrongSignal($signal)
+    {
+        if ('\\' === DIRECTORY_SEPARATOR) {
+            $this->markTestSkipped('POSIX signals do not work on Windows');
+        }
+
+        $process = $this->getProcess(self::$phpBin.' -r "sleep(38);"');
+        $process->start();
+        try {
+            $process->signal($signal);
+            $this->fail('A RuntimeException must have been thrown');
+        } catch (RuntimeException $e) {
+            $process->stop(0);
+        }
+
+        throw $e;
+    }
+
+    public function provideWrongSignal()
+    {
+        return array(
+            array(-4),
+            array('Céphalopodes'),
+        );
+    }
+
+    public function testDisableOutputDisablesTheOutput()
+    {
+        $p = $this->getProcess('foo');
+        $this->assertFalse($p->isOutputDisabled());
+        $p->disableOutput();
+        $this->assertTrue($p->isOutputDisabled());
+        $p->enableOutput();
+        $this->assertFalse($p->isOutputDisabled());
+    }
+
+    /**
+     * @expectedException \Symfony\Component\Process\Exception\RuntimeException
+     * @expectedExceptionMessage Disabling output while the process is running is not possible.
+     */
+    public function testDisableOutputWhileRunningThrowsException()
+    {
+        $p = $this->getProcess(self::$phpBin.' -r "sleep(39);"');
+        $p->start();
+        $p->disableOutput();
+    }
+
+    /**
+     * @expectedException \Symfony\Component\Process\Exception\RuntimeException
+     * @expectedExceptionMessage Enabling output while the process is running is not possible.
+     */
+    public function testEnableOutputWhileRunningThrowsException()
+    {
+        $p = $this->getProcess(self::$phpBin.' -r "sleep(40);"');
+        $p->disableOutput();
+        $p->start();
+        $p->enableOutput();
+    }
+
+    public function testEnableOrDisableOutputAfterRunDoesNotThrowException()
+    {
+        $p = $this->getProcess('echo foo');
+        $p->disableOutput();
+        $p->run();
+        $p->enableOutput();
+        $p->disableOutput();
+        $this->assertTrue($p->isOutputDisabled());
+    }
+
+    /**
+     * @expectedException \Symfony\Component\Process\Exception\LogicException
+     * @expectedExceptionMessage Output can not be disabled while an idle timeout is set.
+     */
+    public function testDisableOutputWhileIdleTimeoutIsSet()
+    {
+        $process = $this->getProcess('foo');
+        $process->setIdleTimeout(1);
+        $process->disableOutput();
+    }
+
+    /**
+     * @expectedException \Symfony\Component\Process\Exception\LogicException
+     * @expectedExceptionMessage timeout can not be set while the output is disabled.
+     */
+    public function testSetIdleTimeoutWhileOutputIsDisabled()
+    {
+        $process = $this->getProcess('foo');
+        $process->disableOutput();
+        $process->setIdleTimeout(1);
+    }
+
+    public function testSetNullIdleTimeoutWhileOutputIsDisabled()
+    {
+        $process = $this->getProcess('foo');
+        $process->disableOutput();
+        $this->assertSame($process, $process->setIdleTimeout(null));
+    }
+
+    /**
+     * @dataProvider provideStartMethods
+     */
+    public function testStartWithACallbackAndDisabledOutput($startMethod, $exception, $exceptionMessage)
+    {
+        $p = $this->getProcess('foo');
+        $p->disableOutput();
+
+        if (method_exists($this, 'expectException')) {
+            $this->expectException($exception);
+            $this->expectExceptionMessage($exceptionMessage);
+        } else {
+            $this->setExpectedException($exception, $exceptionMessage);
+        }
+
+        if ('mustRun' === $startMethod) {
+            $this->skipIfNotEnhancedSigchild();
+        }
+        $p->{$startMethod}(function () {});
+    }
+
+    public function provideStartMethods()
+    {
+        return array(
+            array('start', 'Symfony\Component\Process\Exception\LogicException', 'Output has been disabled, enable it to allow the use of a callback.'),
+            array('run', 'Symfony\Component\Process\Exception\LogicException', 'Output has been disabled, enable it to allow the use of a callback.'),
+            array('mustRun', 'Symfony\Component\Process\Exception\LogicException', 'Output has been disabled, enable it to allow the use of a callback.'),
+        );
+    }
+
+    /**
+     * @dataProvider provideOutputFetchingMethods
+     * @expectedException \Symfony\Component\Process\Exception\LogicException
+     * @expectedExceptionMessage Output has been disabled.
+     */
+    public function testGetOutputWhileDisabled($fetchMethod)
+    {
+        $p = $this->getProcess(self::$phpBin.' -r "sleep(41);"');
+        $p->disableOutput();
+        $p->start();
+        $p->{$fetchMethod}();
+    }
+
+    public function provideOutputFetchingMethods()
+    {
+        return array(
+            array('getOutput'),
+            array('getIncrementalOutput'),
+            array('getErrorOutput'),
+            array('getIncrementalErrorOutput'),
+        );
+    }
+
+    public function testStopTerminatesProcessCleanly()
+    {
+        $process = $this->getProcess(self::$phpBin.' -r "echo 123; sleep(42);"');
+        $process->run(function () use ($process) {
+            $process->stop();
+        });
+        $this->assertTrue(true, 'A call to stop() is not expected to cause wait() to throw a RuntimeException');
+    }
+
+    public function testKillSignalTerminatesProcessCleanly()
+    {
+        $process = $this->getProcess(self::$phpBin.' -r "echo 123; sleep(43);"');
+        $process->run(function () use ($process) {
+            $process->signal(9); // SIGKILL
+        });
+        $this->assertTrue(true, 'A call to signal() is not expected to cause wait() to throw a RuntimeException');
+    }
+
+    public function testTermSignalTerminatesProcessCleanly()
+    {
+        $process = $this->getProcess(self::$phpBin.' -r "echo 123; sleep(44);"');
+        $process->run(function () use ($process) {
+            $process->signal(15); // SIGTERM
+        });
+        $this->assertTrue(true, 'A call to signal() is not expected to cause wait() to throw a RuntimeException');
+    }
+
+    public function responsesCodeProvider()
+    {
+        return array(
+            //expected output / getter / code to execute
+            //array(1,'getExitCode','exit(1);'),
+            //array(true,'isSuccessful','exit();'),
+            array('output', 'getOutput', 'echo \'output\';'),
+        );
+    }
+
+    public function pipesCodeProvider()
+    {
+        $variations = array(
+            'fwrite(STDOUT, $in = file_get_contents(\'php://stdin\')); fwrite(STDERR, $in);',
+            'include \''.__DIR__.'/PipeStdinInStdoutStdErrStreamSelect.php\';',
+        );
+
+        if ('\\' === DIRECTORY_SEPARATOR) {
+            // Avoid XL buffers on Windows because of https://bugs.php.net/bug.php?id=65650
+            $sizes = array(1, 2, 4, 8);
+        } else {
+            $sizes = array(1, 16, 64, 1024, 4096);
+        }
+
+        $codes = array();
+        foreach ($sizes as $size) {
+            foreach ($variations as $code) {
+                $codes[] = array($code, $size);
+            }
+        }
+
+        return $codes;
+    }
+
+    /**
+     * @dataProvider provideVariousIncrementals
+     */
+    public function testIncrementalOutputDoesNotRequireAnotherCall($stream, $method)
+    {
+        $process = $this->getProcess(self::$phpBin.' -r '.escapeshellarg('$n = 0; while ($n < 3) { file_put_contents(\''.$stream.'\', $n, 1); $n++; usleep(1000); }'), null, null, null, null);
+        $process->start();
+        $result = '';
+        $limit = microtime(true) + 3;
+        $expected = '012';
+
+        while ($result !== $expected && microtime(true) < $limit) {
+            $result .= $process->$method();
+        }
+
+        $this->assertSame($expected, $result);
+        $process->stop();
+    }
+
+    public function provideVariousIncrementals()
+    {
+        return array(
+            array('php://stdout', 'getIncrementalOutput'),
+            array('php://stderr', 'getIncrementalErrorOutput'),
+        );
+    }
+
+    /**
+     * @param string      $commandline
+     * @param null|string $cwd
+     * @param null|array  $env
+     * @param null|string $input
+     * @param int         $timeout
+     * @param array       $options
+     *
+     * @return Process
+     */
+    private function getProcess($commandline, $cwd = null, array $env = null, $input = null, $timeout = 60, array $options = array())
+    {
+        $process = new Process($commandline, $cwd, $env, $input, $timeout, $options);
+
+        if (false !== $enhance = getenv('ENHANCE_SIGCHLD')) {
+            try {
+                $process->setEnhanceSigchildCompatibility(false);
+                $process->getExitCode();
+                $this->fail('ENHANCE_SIGCHLD must be used together with a sigchild-enabled PHP.');
+            } catch (RuntimeException $e) {
+                $this->assertSame('This PHP has been compiled with --enable-sigchild. You must use setEnhanceSigchildCompatibility() to use this method.', $e->getMessage());
+                if ($enhance) {
+                    $process->setEnhanceSigchildCompatibility(true);
+                } else {
+                    self::$notEnhancedSigchild = true;
+                }
+            }
+        }
+
+        if (self::$process) {
+            self::$process->stop(0);
+        }
+
+        return self::$process = $process;
+    }
+
+    private function skipIfNotEnhancedSigchild($expectException = true)
+    {
+        if (self::$sigchild) {
+            if (!$expectException) {
+                $this->markTestSkipped('PHP is compiled with --enable-sigchild.');
+            } elseif (self::$notEnhancedSigchild) {
+                if (method_exists($this, 'expectException')) {
+                    $this->expectException('Symfony\Component\Process\Exception\RuntimeException');
+                    $this->expectExceptionMessage('This PHP has been compiled with --enable-sigchild.');
+                } else {
+                    $this->setExpectedException('Symfony\Component\Process\Exception\RuntimeException', 'This PHP has been compiled with --enable-sigchild.');
+                }
+            }
+        }
+    }
+}
+
+class Stringifiable
+{
+    public function __toString()
+    {
+        return 'stringifiable';
+    }
+}
+
+class NonStringifiable
+{
+}