Add another variance test

Author: Girgias

Zend/tests/type_declarations/intersection_types/variance/valid5.phpt

@@ -0,0 +1,45 @@
+--TEST--
+Replacing union of classes respecting intersection type by intersection type
+--FILE--
+<?php
+
+interface X {}
+interface Y {}
+
+class TestOne implements X, Y {}
+class TestTwo implements X, Y {}
+
+interface A
+{
+    public function foo(TestOne|TestTwo $param): X&Y;
+}
+
+interface B extends A
+{
+    public function foo(X&Y $param): TestOne|TestTwo;
+}
+
+interface C extends A
+{
+    public function foo(X $param): TestTwo;
+}
+
+interface D extends A
+{
+    public function foo(Y $param): TestOne;
+}
+
+interface E extends B
+{
+    public function foo(X $param): TestTwo;
+}
+
+interface F extends B
+{
+    public function foo(Y $param): TestOne;
+}
+
+?>
+===DONE===
+--EXPECT--
+===DONE===