Add test for deprecation messages coming from protected class constants

Author: TimWolla

Zend/tests/attributes/deprecated/017.phpt

@@ -0,0 +1,22 @@
+--TEST--
+#[\Deprecated]: Message from protected class constant.
+--FILE--
+<?php
+
+class P {
+	protected const DEPRECATION_MESSAGE = 'from class constant';
+}
+
+class Clazz extends P {
+	#[\Deprecated(parent::DEPRECATION_MESSAGE)]
+	public function test() {
+
+	}
+}
+
+$c = new Clazz();
+$c->test();
+
+?>
+--EXPECTF--
+Deprecated: Method Clazz::test() is deprecated, from class constant in %s on line %d