Add a testcase for retrieving trait constants via Reflection

Author: sj-i

Zend/tests/traits/constant_019.phpt

@@ -0,0 +1,27 @@
+--TEST--
+Flattened trait constants are retrieved as members of the composing class via Reflection
+--FILE--
+<?php
+
+trait TestTrait {
+  public const Constant = 42;
+}
+
+class TestClass {
+  use TestTrait;
+}
+
+$reflection = new \ReflectionClass(TestTrait::class);
+var_dump($reflection->getConstant('Constant'));
+var_dump($reflection->getReflectionConstant('Constant')->getDeclaringClass()->getName());
+
+$reflection = new \ReflectionClass(TestClass::class);
+var_dump($reflection->getConstant('Constant'));
+var_dump($reflection->getReflectionConstant('Constant')->getDeclaringClass()->getName());
+
+?>
+--EXPECTF--
+int(42)
+string(9) "TestTrait"
+int(42)
+string(9) "TestClass"