From f9dc073b04b4b2bcfd46d39f140d2747ac5f8c2f Mon Sep 17 00:00:00 2001
From: Jakub Zelenka <bukka@php.net>
Date: Sat, 27 Sep 2025 12:43:28 +0200
Subject: [PATCH] Add stream filter convert.* tests (#19976)

The convert.* filters are quite untested so this tries to improve it.

Closes GH-19976
---
 ext/standard/tests/filters/convert.phpt | 130 ++++++++++++++++++++++++
 1 file changed, 130 insertions(+)
 create mode 100644 ext/standard/tests/filters/convert.phpt

diff --git a/ext/standard/tests/filters/convert.phpt b/ext/standard/tests/filters/convert.phpt
new file mode 100644
index 0000000000000..a99579b5dd8fe
--- /dev/null
+++ b/ext/standard/tests/filters/convert.phpt
@@ -0,0 +1,130 @@
+--TEST--
+convert stream filter tests
+--FILE--
+<?php
+
+$text = "Hello World!";
+$binary = "ABC\xFF";
+
+function test_roundtrip($data, $encode, $decode, $opts = null, $is_binary = false) {
+    echo "Filter: $encode\n";
+
+    $fp = tmpfile();
+    fwrite($fp, $data);
+    rewind($fp);
+
+    if ($opts === null) {
+        stream_filter_prepend($fp, $encode, STREAM_FILTER_READ);
+    } else {
+        stream_filter_prepend($fp, $encode, STREAM_FILTER_READ, $opts);
+    }
+    $encoded = stream_get_contents($fp);
+    fclose($fp);
+
+    if ($is_binary) {
+        echo "Original (hex): " . bin2hex($data) . "\n";
+        echo "Encoded: $encoded\n";
+    } else {
+        echo "Original: $data\n";
+        echo "Encoded: $encoded\n";
+    }
+
+    $fp2 = tmpfile();
+    fwrite($fp2, $encoded);
+    rewind($fp2);
+
+    if ($opts === null) {
+        stream_filter_prepend($fp2, $decode, STREAM_FILTER_READ);
+    } else {
+        stream_filter_prepend($fp2, $decode, STREAM_FILTER_READ, $opts);
+    }
+    $decoded = stream_get_contents($fp2);
+    fclose($fp2);
+
+    if ($is_binary) {
+        echo "Decoded (hex): " . bin2hex($decoded) . "\n";
+    } else {
+        echo "Decoded: $decoded\n";
+    }
+    var_dump($data === $decoded);
+    echo "\n";
+}
+
+test_roundtrip($text, "convert.base64-encode", "convert.base64-decode");
+test_roundtrip($binary, "convert.base64-encode", "convert.base64-decode", null, true);
+test_roundtrip("", "convert.base64-encode", "convert.base64-decode");
+test_roundtrip("A", "convert.base64-encode", "convert.base64-decode");
+
+test_roundtrip($text, "convert.quoted-printable-encode", "convert.quoted-printable-decode");
+test_roundtrip("Line1\r\nLine2", "convert.quoted-printable-encode", "convert.quoted-printable-decode");
+
+$opts = array('line-length' => 20, 'line-break-chars' => "\n");
+test_roundtrip("Long text that will be wrapped", "convert.base64-encode", "convert.base64-decode", $opts);
+
+$opts2 = array('binary' => true);
+test_roundtrip("Text\t\r\n", "convert.quoted-printable-encode", "convert.quoted-printable-decode", $opts2);
+
+$fp = tmpfile();
+fwrite($fp, "Test");
+rewind($fp);
+stream_filter_prepend($fp, 'convert.base64-encode', STREAM_FILTER_READ);
+$result = stream_get_contents($fp);
+fclose($fp);
+var_dump($result === base64_encode("Test"));
+
+?>
+--EXPECTF--
+Filter: convert.base64-encode
+Original: Hello World!
+Encoded: SGVsbG8gV29ybGQh
+Decoded: Hello World!
+bool(true)
+
+Filter: convert.base64-encode
+Original (hex): 414243ff
+Encoded: QUJD/w==
+Decoded (hex): 414243ff
+bool(true)
+
+Filter: convert.base64-encode
+Original: 
+Encoded: 
+Decoded: 
+bool(true)
+
+Filter: convert.base64-encode
+Original: A
+Encoded: QQ==
+Decoded: A
+bool(true)
+
+Filter: convert.quoted-printable-encode
+Original: Hello World!
+Encoded: Hello World!
+Decoded: Hello World!
+bool(true)
+
+Filter: convert.quoted-printable-encode
+Original: Line1
+Line2
+Encoded: Line1=0D=0ALine2
+Decoded: Line1
+Line2
+bool(true)
+
+Filter: convert.base64-encode
+Original: Long text that will be wrapped
+Encoded: TG9uZyB0ZXh0IHRoYXQg
+d2lsbCBiZSB3cmFwcGVk
+Decoded: Long text that will be wrapped
+bool(true)
+
+Filter: convert.quoted-printable-encode
+Original: Text	
+
+Encoded: Text=09=0D=0A
+Decoded: Text	
+
+bool(true)
+
+bool(true)