Refactor ratpack framework test

Author: egregius313

java/ql/test/library-tests/frameworks/ratpack/flow.ql

@@ -3,28 +3,28 @@ import semmle.code.java.dataflow.TaintTracking
 import semmle.code.java.dataflow.FlowSources
 import TestUtilities.InlineExpectationsTest
 
-class Conf extends TaintTracking::Configuration {
-  Conf() { this = "qltest:frameworks:ratpack" }
-
-  override predicate isSource(DataFlow::Node n) {
+module Config implements DataFlow::ConfigSig {
+  predicate isSource(DataFlow::Node n) {
     n.asExpr().(MethodAccess).getMethod().hasName("taint")
     or
     n instanceof RemoteFlowSource
   }
 
-  override predicate isSink(DataFlow::Node n) {
+  predicate isSink(DataFlow::Node n) {
     exists(MethodAccess ma | ma.getMethod().hasName("sink") | n.asExpr() = ma.getAnArgument())
   }
 }
 
+module Flow = TaintTracking::Global<Config>;
+
 class HasFlowTest extends InlineExpectationsTest {
   HasFlowTest() { this = "HasFlowTest" }
 
   override string getARelevantTag() { result = "hasTaintFlow" }
 
   override predicate hasActualResult(Location location, string element, string tag, string value) {
     tag = "hasTaintFlow" and
-    exists(DataFlow::Node sink, Conf conf | conf.hasFlowTo(sink) |
+    exists(DataFlow::Node sink | Flow::flowTo(sink) |
       sink.getLocation() = location and
       element = sink.toString() and
       value = ""