Support generating default route w/o parameters

src/UrlHelper.php

@@ -42,14 +42,15 @@ public function __construct(RouterInterface $router)
      *
      * @param string $routeName
      * @param array $params
+     * @param bool $reuseResultParams
      * @return string
      * @throws Exception\RuntimeException if no route provided, and no result match
      *     present.
      * @throws Exception\RuntimeException if no route provided, and result match is a
      *     routing failure.
      * @throws RouterException if router cannot generate URI for given route.
      */
-    public function __invoke($routeName = null, array $params = [])
+    public function __invoke($routeName = null, array $params = [], $reuseResultParams = true)
     {
         $result = $this->getRouteResult();
         if ($routeName === null && $result === null) {
@@ -67,7 +68,7 @@ public function __invoke($routeName = null, array $params = [])
             return $basePath . $this->generateUriFromResult($params, $result);
         }
 
-        if ($result) {
+        if ($result && $reuseResultParams) {
             $params = $this->mergeParams($routeName, $result, $params);
         }
 

test/UrlHelperTest.php

@@ -136,6 +136,21 @@ public function testProvidedParametersOverrideAnyPresentInARouteResultWhenGenera
         $this->assertEquals('URL', $helper('resource', ['id' => 2]));
     }
 
+    public function testWillNotReuseRouteResultParamsIfReuseResultParamsFlagIsFalseWhenGeneratingUri()
+    {
+        $result = $this->prophesize(RouteResult::class);
+        $result->isFailure()->willReturn(false);
+        $result->getMatchedRouteName()->willReturn('resource');
+        $result->getMatchedParams()->willReturn(['id' => 1]);
+
+        $this->router->generateUri('resource', [])->willReturn('URL');
+
+        $helper = $this->createHelper();
+        $helper->setRouteResult($result->reveal());
+
+        $this->assertEquals('URL', $helper('resource', [], false));
+    }
+
     public function testCanInjectRouteResult()
     {
         $result = $this->prophesize(RouteResult::class);