ProcessExecutor - do not format output from executed processes

tests/Composer/Test/Util/ProcessExecutorTest.php

@@ -12,9 +12,14 @@
 
 namespace Composer\Test\Util;
 
+use Composer\IO\ConsoleIO;
 use Composer\Util\ProcessExecutor;
 use Composer\Test\TestCase;
 use Composer\IO\BufferIO;
+use Symfony\Component\Console\Helper\HelperSet;
+use Symfony\Component\Console\Input\ArrayInput;
+use Symfony\Component\Console\Output\BufferedOutput;
+use Symfony\Component\Console\Output\OutputInterface;
 use Symfony\Component\Console\Output\StreamOutput;
 
 class ProcessExecutorTest extends TestCase
@@ -99,4 +104,13 @@ class ProcessExecutorTest extends TestCase
         $this->assertEquals(array('foo', 'bar'), $process->splitLines("foo\r\nbar"));
         $this->assertEquals(array('foo', 'bar'), $process->splitLines("foo\r\nbar\n"));
     }
+
+    public function testConsoleIODoesNotFormatSymfonyConsoleStyle()
+    {
+        $output = new BufferedOutput(OutputInterface::VERBOSITY_NORMAL, true);
+        $process = new ProcessExecutor(new ConsoleIO(new ArrayInput([]), $output, new HelperSet([])));
+
+        $process->execute('echo \'<error>foo</error>\'');
+        $this->assertSame('<error>foo</error>', $output->fetch());
+    }
 }