Add json encode recursion tests

Author: bukka

ext/json/tests/json_encode_recursion_01.phpt

@@ -0,0 +1,27 @@
+--TEST--
+json_encode() Recursion test with just JsonSerializable
+--FILE--
+<?php
+
+class SerializingTest implements JsonSerializable
+{
+    public $a = 1;
+
+    private $b = 'hide';
+
+    protected $c = 'protect';
+
+    public function jsonSerialize(): mixed
+    {
+        $result = json_encode($this);
+        var_dump($result);
+        return $this;
+    }
+}
+
+var_dump(json_encode(new SerializingTest()));
+?>
+--EXPECT--
+bool(false)
+string(7) "{"a":1}"
+string(7) "{"a":1}"

ext/json/tests/json_encode_recursion_02.phpt

@@ -0,0 +1,25 @@
+--TEST--
+json_encode() Recursion test with JsonSerializable and var_dump simple
+--FILE--
+<?php
+
+class SerializingTest implements JsonSerializable
+{
+    public $a = 1;
+
+    public function jsonSerialize(): mixed
+    {
+        var_dump($this);
+        return $this;
+    }
+}
+
+var_dump(json_encode(new SerializingTest()));
+
+?>
+--EXPECT--
+object(SerializingTest)#1 (1) {
+  ["a"]=>
+  int(1)
+}
+string(7) "{"a":1}"

ext/json/tests/json_encode_recursion_03.phpt

@@ -0,0 +1,39 @@
+--TEST--
+json_encode() Recursion test with JsonSerializable and __debugInfo
+--FILE--
+<?php
+
+class SerializingTest implements JsonSerializable
+{
+    public $a = 1;
+
+    public function __debugInfo()
+    {
+        return [ 'result' => json_encode($this) ];
+    }
+
+    public function jsonSerialize(): mixed
+    {
+        var_dump($this);
+        return $this;
+    }
+}
+
+var_dump(json_encode(new SerializingTest()));
+echo "---------\n";
+var_dump(new SerializingTest());
+
+?>
+--EXPECT--
+*RECURSION*
+object(SerializingTest)#1 (1) {
+  ["result"]=>
+  string(7) "{"a":1}"
+}
+string(7) "{"a":1}"
+---------
+*RECURSION*
+object(SerializingTest)#1 (1) {
+  ["result"]=>
+  string(7) "{"a":1}"
+}

ext/json/tests/json_encode_recursion_04.phpt

@@ -0,0 +1,41 @@
+--TEST--
+json_encode() Recursion test with JsonSerializable, __debugInfo and var_export
+--FILE--
+<?php
+
+class SerializingTest implements JsonSerializable
+{
+    public $a = 1;
+
+    public function __debugInfo()
+    {
+        return [ 'result' => var_export($this, true) ];
+    }
+
+    public function jsonSerialize(): mixed
+    {
+        var_dump($this);
+        return $this;
+    }
+}
+
+var_dump(json_encode(new SerializingTest()));
+echo "---------\n";
+var_dump(new SerializingTest());
+
+?>
+--EXPECT--
+object(SerializingTest)#1 (1) {
+  ["result"]=>
+  string(52) "\SerializingTest::__set_state(array(
+   'a' => 1,
+))"
+}
+string(7) "{"a":1}"
+---------
+object(SerializingTest)#1 (1) {
+  ["result"]=>
+  string(52) "\SerializingTest::__set_state(array(
+   'a' => 1,
+))"
+}

ext/json/tests/json_encode_recursion_05.phpt

@@ -0,0 +1,37 @@
+--TEST--
+json_encode() Recursion test with JsonSerializable, __debugInfo and print_r
+--FILE--
+<?php
+
+class SerializingTest implements JsonSerializable
+{
+    public $a = 1;
+
+    public function __debugInfo()
+    {
+        return [ 'result' => $this->a ];
+    }
+
+    public function jsonSerialize(): mixed
+    {
+        print_r($this);
+        return $this;
+    }
+}
+
+var_dump(json_encode(new SerializingTest()));
+echo "---------\n";
+var_dump(new SerializingTest());
+
+?>
+--EXPECT--
+SerializingTest Object
+(
+    [result] => 1
+)
+string(7) "{"a":1}"
+---------
+object(SerializingTest)#1 (1) {
+  ["result"]=>
+  int(1)
+}

ext/json/tests/json_encode_recursion_06.phpt

@@ -0,0 +1,41 @@
+--TEST--
+json_encode() Recursion test with JsonSerializable and serialize
+--FILE--
+<?php
+
+class JsonEncodeFirstTest implements JsonSerializable
+{
+    public $a = 1;
+
+    public function __serialize()
+    {
+        return [ 'result' => $this->a ];
+    }
+
+    public function jsonSerialize(): mixed
+    {
+        return [ 'serialize' => serialize($this) ];
+    }
+}
+
+class SerializeFirstTest implements JsonSerializable
+{
+    public $a = 1;
+
+    public function __serialize()
+    {
+        return [ 'result' => json_encode($this) ];
+    }
+
+    public function jsonSerialize(): mixed
+    {
+        return [ 'json' => serialize($this) ];
+    }
+}
+
+var_dump(json_encode(new JsonEncodeFirstTest()));
+var_dump(serialize(new SerializeFirstTest()));
+?>
+--EXPECT--
+string(68) "{"serialize":"O:19:\"JsonEncodeFirstTest\":1:{s:6:\"result\";i:1;}"}"
+string(194) "O:18:"SerializeFirstTest":1:{s:6:"result";s:142:"{"json":"O:18:\"SerializeFirstTest\":1:{s:6:\"result\";s:62:\"{\"json\":\"O:18:\\\"SerializeFirstTest\\\":1:{s:6:\\\"result\\\";b:0;}\"}\";}"}";}"