From 1f042b86a4d20363ff4de74517fda7be852d8b9d Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Guillaume=20P=C3=A9delagrabe?= <gpedelagrabe@gmail.com>
Date: Thu, 26 Mar 2020 15:03:46 +0100
Subject: [PATCH] testDoWriteOnFailure

---
 .../Component/Console/Output/StreamOutput.php      |  1 +
 .../Console/Tests/Fixtures/stream_output_file.txt  |  0
 .../Console/Tests/Output/StreamOutputTest.php      | 14 ++++++++++++++
 3 files changed, 15 insertions(+)
 create mode 100644 src/Symfony/Component/Console/Tests/Fixtures/stream_output_file.txt

diff --git a/src/Symfony/Component/Console/Output/StreamOutput.php b/src/Symfony/Component/Console/Output/StreamOutput.php
index e1b8c9ca5437a..de5f62404312e 100644
--- a/src/Symfony/Component/Console/Output/StreamOutput.php
+++ b/src/Symfony/Component/Console/Output/StreamOutput.php
@@ -75,6 +75,7 @@ protected function doWrite($message, $newline)
         }
 
         if (!is_resource($this->stream) || !is_string($message)) {
+            // should never happen
             throw new RuntimeException('Unable to write output.');
         }
         @fwrite($this->stream, $message);
diff --git a/src/Symfony/Component/Console/Tests/Fixtures/stream_output_file.txt b/src/Symfony/Component/Console/Tests/Fixtures/stream_output_file.txt
new file mode 100644
index 0000000000000..e69de29bb2d1d
diff --git a/src/Symfony/Component/Console/Tests/Output/StreamOutputTest.php b/src/Symfony/Component/Console/Tests/Output/StreamOutputTest.php
index d843fa4a4559c..34b67e41a5c93 100644
--- a/src/Symfony/Component/Console/Tests/Output/StreamOutputTest.php
+++ b/src/Symfony/Component/Console/Tests/Output/StreamOutputTest.php
@@ -11,6 +11,7 @@
 
 namespace Symfony\Component\Console\Tests\Output;
 
+use PHPUnit\Framework\AssertionFailedError;
 use PHPUnit\Framework\TestCase;
 use Symfony\Component\Console\Output\Output;
 use Symfony\Component\Console\Output\StreamOutput;
@@ -56,4 +57,17 @@ public function testDoWrite()
         rewind($output->getStream());
         $this->assertEquals('foo'.PHP_EOL, stream_get_contents($output->getStream()), '->doWrite() writes to the stream');
     }
+
+    public function testDoWriteOnFailure()
+    {
+        $resource = fopen(__DIR__.'/../Fixtures/stream_output_file.txt', 'r', false);
+        $output = new StreamOutput($resource);
+        try {
+            $output->writeln('foo');
+        } catch (\RuntimeException $exception) {
+            throw new AssertionFailedError('dd');
+        }
+        rewind($output->getStream());
+        $this->assertEquals('', stream_get_contents($output->getStream()));
+    }
 }