From da96719b94fae82ab7fc1c783256f53f47f50975 Mon Sep 17 00:00:00 2001
From: Nicolas Grekas <nicolas.grekas@gmail.com>
Date: Tue, 16 Aug 2016 10:16:14 +0200
Subject: [PATCH] [VarDumper] Fix dumping continuations

---
 .../DataCollector/DumpDataCollector.php       |  3 +-
 .../Component/VarDumper/Dumper/HtmlDumper.php | 16 ++---------
 .../VarDumper/Tests/HtmlDumperTest.php        | 28 +++++++++++++++++--
 3 files changed, 29 insertions(+), 18 deletions(-)

diff --git a/src/Symfony/Component/HttpKernel/DataCollector/DumpDataCollector.php b/src/Symfony/Component/HttpKernel/DataCollector/DumpDataCollector.php
index c50bf7a135b39..635402e16093a 100644
--- a/src/Symfony/Component/HttpKernel/DataCollector/DumpDataCollector.php
+++ b/src/Symfony/Component/HttpKernel/DataCollector/DumpDataCollector.php
@@ -211,8 +211,7 @@ public function getDumps($format, $maxDepthLimit = -1, $maxItemsPerDepth = -1)
                 // getLimitedClone is @deprecated, to be removed in 3.0
                 $dumper->dump($dump['data']->getLimitedClone($maxDepthLimit, $maxItemsPerDepth));
             }
-            rewind($data);
-            $dump['data'] = stream_get_contents($data);
+            $dump['data'] = stream_get_contents($data, -1, 0);
             ftruncate($data, 0);
             rewind($data);
             $dumps[] = $dump;
diff --git a/src/Symfony/Component/VarDumper/Dumper/HtmlDumper.php b/src/Symfony/Component/VarDumper/Dumper/HtmlDumper.php
index 43601fe668f5a..0b032b71e6693 100644
--- a/src/Symfony/Component/VarDumper/Dumper/HtmlDumper.php
+++ b/src/Symfony/Component/VarDumper/Dumper/HtmlDumper.php
@@ -54,18 +54,6 @@ public function __construct($output = null, $charset = null)
         $this->dumpId = 'sf-dump-'.mt_rand();
     }
 
-    /**
-     * {@inheritdoc}
-     */
-    public function setOutput($output)
-    {
-        if ($output !== $prev = parent::setOutput($output)) {
-            $this->headerIsDumped = false;
-        }
-
-        return $prev;
-    }
-
     /**
      * {@inheritdoc}
      */
@@ -111,7 +99,7 @@ public function dump(Data $data, $output = null)
      */
     protected function getDumpHeader()
     {
-        $this->headerIsDumped = true;
+        $this->headerIsDumped = null !== $this->outputStream ? $this->outputStream : $this->lineDumper;
 
         if (null !== $this->dumpHeader) {
             return $this->dumpHeader;
@@ -433,7 +421,7 @@ protected function dumpLine($depth, $endOfValue = false)
         if (-1 === $this->lastDepth) {
             $this->line = sprintf($this->dumpPrefix, $this->dumpId, $this->indentPad).$this->line;
         }
-        if (!$this->headerIsDumped) {
+        if ($this->headerIsDumped !== (null !== $this->outputStream ? $this->outputStream : $this->lineDumper)) {
             $this->line = $this->getDumpHeader().$this->line;
         }
 
diff --git a/src/Symfony/Component/VarDumper/Tests/HtmlDumperTest.php b/src/Symfony/Component/VarDumper/Tests/HtmlDumperTest.php
index 1171bb80831c5..30495f7c40580 100644
--- a/src/Symfony/Component/VarDumper/Tests/HtmlDumperTest.php
+++ b/src/Symfony/Component/VarDumper/Tests/HtmlDumperTest.php
@@ -132,8 +132,7 @@ public function testCharset()
         $data = $cloner->cloneVar($var);
         $out = fopen('php://memory', 'r+b');
         $dumper->dump($data, $out);
-        rewind($out);
-        $out = stream_get_contents($out);
+        $out = stream_get_contents($out, -1, 0);
 
         $this->assertStringMatchesFormat(
             <<<EOTXT
@@ -142,7 +141,32 @@ public function testCharset()
 
 EOTXT
             ,
+            $out
+        );
+    }
 
+    public function testAppend()
+    {
+        $out = fopen('php://memory', 'r+b');
+
+        $dumper = new HtmlDumper();
+        $dumper->setDumpHeader('<foo></foo>');
+        $dumper->setDumpBoundaries('<bar>', '</bar>');
+        $cloner = new VarCloner();
+
+        $dumper->dump($cloner->cloneVar(123), $out);
+        $dumper->dump($cloner->cloneVar(456), $out);
+
+        $out = stream_get_contents($out, -1, 0);
+
+        $this->assertSame(<<<'EOTXT'
+<foo></foo><bar><span class=sf-dump-num>123</span>
+</bar>
+<bar><span class=sf-dump-num>456</span>
+</bar>
+
+EOTXT
+            ,
             $out
         );
     }

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