diff --git a/src/Symfony/Component/Console/Helper/ProgressHelper.php b/src/Symfony/Component/Console/Helper/ProgressHelper.php
index 1c2ecc2a8a468..d9502eb814e4a 100644
--- a/src/Symfony/Component/Console/Helper/ProgressHelper.php
+++ b/src/Symfony/Component/Console/Helper/ProgressHelper.php
@@ -11,6 +11,7 @@
namespace Symfony\Component\Console\Helper;
+use Symfony\Component\Console\Output\NullOutput;
use Symfony\Component\Console\Output\OutputInterface;
/**
@@ -185,7 +186,9 @@ public function start(OutputInterface $output, $max = null)
$this->startTime = time();
$this->current = 0;
$this->max = (int) $max;
- $this->output = $output;
+
+ // Disabling output when it does not support ANSI codes as it would result in a broken display anyway.
+ $this->output = $output->isDecorated() ? $output : new NullOutput();
$this->lastMessagesLength = 0;
$this->barCharOriginal = '';
diff --git a/src/Symfony/Component/Console/Tests/Helper/ProgressHelperTest.php b/src/Symfony/Component/Console/Tests/Helper/ProgressHelperTest.php
index 40d856f542bf8..88adf69c56c83 100644
--- a/src/Symfony/Component/Console/Tests/Helper/ProgressHelperTest.php
+++ b/src/Symfony/Component/Console/Tests/Helper/ProgressHelperTest.php
@@ -192,9 +192,19 @@ public function testPercentNotHundredBeforeComplete()
$this->assertEquals($this->generateOutput(' 0/200 [>---------------------------] 0%').$this->generateOutput(' 199/200 [===========================>] 99%').$this->generateOutput(' 200/200 [============================] 100%'), stream_get_contents($output->getStream()));
}
- protected function getOutputStream()
+ public function testNonDecoratedOutput()
{
- return new StreamOutput(fopen('php://memory', 'r+', false));
+ $progress = new ProgressHelper();
+ $progress->start($output = $this->getOutputStream(false));
+ $progress->advance();
+
+ rewind($output->getStream());
+ $this->assertEquals('', stream_get_contents($output->getStream()));
+ }
+
+ protected function getOutputStream($decorated = true)
+ {
+ return new StreamOutput(fopen('php://memory', 'r+', false), StreamOutput::VERBOSITY_NORMAL, $decorated);
}
protected $lastMessagesLength;
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