Add test for trait behavior

Author: nikic

Zend/tests/static_variables_traits.phpt

@@ -0,0 +1,43 @@
+--TEST--
+Behavior of static variables in trait methods
+--FILE--
+<?php
+
+trait T {
+    public static function counter() {
+        static $i = 0;
+        var_dump(++$i);
+    }
+}
+
+class C1 {
+    use T {
+        T::counter as counter1;
+        T::counter as counter2;
+    }
+}
+
+class C2 {
+    use T;
+}
+
+C1::counter();
+C1::counter1();
+C1::counter2();
+C2::counter();
+
+C1::counter();
+C1::counter1();
+C1::counter2();
+C2::counter();
+
+?>
+--EXPECT--
+int(1)
+int(1)
+int(1)
+int(1)
+int(2)
+int(2)
+int(2)
+int(2)