Add tests for nullsafe operator on delayed oplines

Author: iluuu1994

Zend/tests/nullsafe_operator/034.phpt

@@ -0,0 +1,28 @@
+--TEST--
+Test nullsafe operator on delayed dim
+--FILE--
+<?php
+
+$arr = [
+    'foo' => null,
+    'bar' => [
+        'baz' => null,
+    ],
+];
+
+var_dump($arr['foo']?->something);
+var_dump($arr['invalid']?->something);
+
+var_dump($arr['bar']['baz']?->something);
+var_dump($arr['bar']['invalid']?->something);
+
+?>
+--EXPECTF--
+NULL
+
+Warning: Undefined array key "invalid" in %s.php on line 11
+NULL
+NULL
+
+Warning: Undefined array key "invalid" in %s.php on line 14
+NULL

Zend/tests/nullsafe_operator/035.phpt

@@ -0,0 +1,27 @@
+--TEST--
+Test nullsafe operator on delayed var
+--FILE--
+<?php
+
+class Foo {
+    public ?Bar $bar;
+}
+
+class Bar {
+    public string $baz;
+}
+
+$foo = new Foo();
+
+$foo->bar = null;
+var_dump($foo->bar?->baz);
+
+$bar = new Bar();
+$bar->baz = 'baz';
+$foo->bar = $bar;
+var_dump($foo->bar?->baz);
+
+?>
+--EXPECT--
+NULL
+string(3) "baz"

Zend/tests/nullsafe_operator/036.phpt

@@ -0,0 +1,28 @@
+--TEST--
+Test nullsafe method call on delayed var
+--FILE--
+<?php
+
+class Foo {
+    public ?Bar $bar;
+}
+
+class Bar {
+    public function baz() {
+        return 'baz';
+    }
+}
+
+$foo = new Foo();
+
+$foo->bar = null;
+var_dump($foo->bar?->baz());
+
+$bar = new Bar();
+$foo->bar = $bar;
+var_dump($foo->bar?->baz());
+
+?>
+--EXPECT--
+NULL
+string(3) "baz"

Zend/tests/nullsafe_operator/037.phpt

@@ -0,0 +1,15 @@
+--TEST--
+Test nullsafe operator in nested delayed dims
+--FILE--
+<?php
+
+$foo = new stdClass();
+$foo->bar = 'bar';
+
+$array = ['foo' => ['bar' => 'baz']];
+
+var_dump($array['foo'][$foo?->bar]);
+
+?>
+--EXPECT--
+string(3) "baz"

Zend/tests/nullsafe_operator/038.phpt

@@ -0,0 +1,12 @@
+--TEST--
+Test nullsafe operator in nested delayed dims 2
+--FILE--
+<?php
+
+$foo = (object) ['bar' => 0];
+$array = [[null]];
+var_dump($array[0][$foo->bar]?->baz);
+
+?>
+--EXPECT--
+NULL