do not need parenthesis for associative operations (IDEADEV-41569); move to java-tests

java/java-tests/testData/refactoring/introduceVariable/SCR26075.java

@@ -0,0 +1,14 @@
+class C {
+    String f () {
+       return null;
+    }
+
+    C getParent() {return null;}
+
+    void test () {
+        C c = new C();
+        while (<selection>c.f()</selection> != null) {
+            c = c.getParent();
+        }
+    }
+}