[Process] Stop the process correctly even if underlying input stream …

…is not closed:

While checking a process to end, on posix system, process component only checks if pipes are still open, this fix
ensure that if the process is terminated it correctly return, even if the underlying pipe is not closed.

It can be useful when using \STDIN as a input stream as it will always be open

Process.php

@@ -428,7 +428,7 @@ public function wait(callable $callback = null)
 
         do {
             $this->checkTimeout();
-            $running = '\\' === \DIRECTORY_SEPARATOR ? $this->isRunning() : $this->processPipes->areOpen();
+            $running = $this->isRunning() && ('\\' === \DIRECTORY_SEPARATOR || $this->processPipes->areOpen());
             $this->readPipes($running, '\\' !== \DIRECTORY_SEPARATOR || !$running);
         } while ($running);
 

Tests/ProcessTest.php

@@ -1538,6 +1538,16 @@ public function testEnvCaseInsensitiveOnWindows()
         }
     }
 
+    public function testNotTerminableInputPipe()
+    {
+        $process = $this->getProcess('echo foo');
+        $process->setInput(\STDIN);
+        $process->start();
+        $process->setTimeout(2);
+        $process->wait();
+        $this->assertFalse($process->isRunning());
+    }
+
     /**
      * @param string|array $commandline
      * @param mixed        $input