FIX: Read the whole stream and perform code transformations

First read the whole stream and afterwards perform code transformations.
This will ensure to also replace code, which is divided into chunks while
reading a file.

Fixes #268 and #383

(cherry picked from commit 1917d66)

src/VCR/CodeTransform/AbstractCodeTransform.php

@@ -12,14 +12,20 @@ abstract class AbstractCodeTransform extends \php_user_filter
 {
     public const NAME = 'vcr_abstract_filter';
 
+    /** @var string */
+    private $data = '';
+
     /**
      * Attaches the current filter to a stream.
      */
     public function register(): void
     {
         if (!\in_array(static::NAME, stream_get_filters(), true)) {
             $isRegistered = stream_filter_register(static::NAME, static::class);
-            Assertion::true($isRegistered, sprintf('Failed registering stream filter "%s" on stream "%s"', static::class, static::NAME));
+            Assertion::true(
+                $isRegistered,
+                sprintf('Failed registering stream filter "%s" on stream "%s"', static::class, static::NAME)
+            );
         }
     }
 
@@ -37,12 +43,19 @@ public function register(): void
      */
     public function filter($in, $out, &$consumed, $closing)
     {
-        while ($bucket = stream_bucket_make_writeable($in)) {
-            $bucket->data = $this->transformCode($bucket->data);
-            $consumed += $bucket->datalen;
-            stream_bucket_append($out, $bucket);
+        while ($buffer = stream_bucket_make_writeable($in)) {
+            $this->data .= $buffer->data;
+            $consumed += $buffer->datalen;
+        }
+
+        if (!$closing) {
+            return \PSFS_FEED_ME;
         }
 
+        $bucket = stream_bucket_new($this->stream, $this->transformCode($this->data));
+        $this->data = '';
+        stream_bucket_append($out, $bucket);
+
         return \PSFS_PASS_ON;
     }