fix(dsr): Use state.includes instead of state.name.indexOf to determi…

…ne if a dsr state is my ancestor

Closes #208

src/dsr.js

@@ -129,7 +129,7 @@ angular.module('ct.ui.router.extras.dsr').service("$deepStateRedirect", [ '$root
         // update Last-SubState&params for each DSR that this transition matches.
         var cfg = getConfig($state.get(dsrState));
         var key = getParamsString(toParams, cfg.params);
-        if (name == dsrState || name.indexOf(dsrState + ".") != -1) {
+        if (toState.$$state().includes[dsrState]) {
           lastSubstate[dsrState][key] = { state: name, params: angular.copy(toParams) };
         }
       });

test/dsrSpec.js

@@ -39,7 +39,10 @@ function getDSRStates () {
     { name: 'p6.child3'},
     { name: 'p7', url: '/p7/:param', dsr: { default: {}, fn: p7DSRFunction } },
     { name: 'p7.child1'},
-    { name: 'p7.child2'}
+    { name: 'p7.child2'},
+    { name: 'p8', dsr: true },
+    { name: 'p8child1', parent: 'p8' },
+    { name: 'p8child2', parent: 'p8' }
   ];
 }
 
@@ -95,6 +98,14 @@ describe('deepStateRedirect', function () {
     }));
   });
 
+  describe("with child substates configured using {parent: parentState}", function() {
+    it("should remember and redirect to the last deepest state", function() {
+      testGo("p8child1");
+      testGo("other");
+      testGo("p8", undefined, { redirect: 'p8child1'} );
+    });
+  });
+
   describe('with configured params', function () {
     it("should redirect only when params match", inject(function($state, $q) {
       $state.go("p1", { param1: "foo", param2: "foo2" } ); $q.flush();