fix(router): allow generating links with numeric params

modules/angular2/src/router/path_recognizer.ts

@@ -5,8 +5,7 @@ import {
   StringWrapper,
   isPresent,
   isBlank,
-  BaseException,
-  normalizeBlank
+  BaseException
 } from 'angular2/src/facade/lang';
 import {Promise, PromiseWrapper} from 'angular2/src/facade/async';
 import {
@@ -29,6 +28,14 @@ export class Segment {
   regex: string;
 }
 
+function normalizeString(obj: any): string {
+  if (isBlank(obj)) {
+    return null;
+  } else {
+    return obj.toString();
+  }
+}
+
 class ContinuationSegment extends Segment {
   generate(params): string { return ''; }
 }
@@ -56,7 +63,7 @@ class DynamicSegment {
       throw new BaseException(
           `Route generator for '${this.name}' was not included in parameters passed.`);
     }
-    return normalizeBlank(StringMapWrapper.get(params, this.name));
+    return normalizeString(StringMapWrapper.get(params, this.name));
   }
 }
 
@@ -66,7 +73,7 @@ class StarSegment {
   constructor(public name: string) {}
 
   generate(params: StringMap<string, string>): string {
-    return normalizeBlank(StringMapWrapper.get(params, this.name));
+    return normalizeString(StringMapWrapper.get(params, this.name));
   }
 }
 

modules/angular2/test/router/route_recognizer_spec.ts

@@ -112,6 +112,10 @@ export function main() {
       expect(recognizer.generate('user', {'name': 'misko'})['url']).toEqual('app/user/misko');
     });
 
+    it('should generate URLs with numeric params', () => {
+      recognizer.addConfig('/app/page/:number', handler, 'page');
+      expect(recognizer.generate('page', {'number': 42})['url']).toEqual('app/page/42');
+    });
 
     it('should throw in the absence of required params URLs', () => {
       recognizer.addConfig('app/user/:name', handler, 'user');