fix: build path correctly when 'trailingSlash' is set and with query params

Author: troch

modules/RouteNode.js

@@ -324,7 +324,15 @@ export default class RouteNode {
                 return segment.absolute ? segmentPath : path + segmentPath;
             }, '');
 
-        return path + (searchPart ? '?' + searchPart : '');
+        let finalPath = path;
+
+        if (options.trailingSlash === true) {
+            finalPath = /\/$/.test(path) ? path : `${path}/`;
+        } else if (options.trailingSlash === false) {
+            finalPath = /\/$/.test(path) ? path.slice(0, -1) : path;
+        }
+
+        return finalPath + (searchPart ? '?' + searchPart : '');
     }
 
     getMetaFromSegments(segments) {
@@ -354,12 +362,6 @@ export default class RouteNode {
         const options = { ...defaultOptions, ...opts };
         const path = this.buildPathFromSegments(this.getSegmentsByName(routeName), params, options);
 
-        if (options.trailingSlash === true) {
-            return /\/$/.test(path) ? path : `${path}/`;
-        } else if (options.trailingSlash === false) {
-            return /\/$/.test(path) ? path.slice(0, -1) : path;
-        }
-
         return path;
     }
 

test/main.js

@@ -513,6 +513,17 @@ describe('RouteNode', function () {
             withoutMeta(match2).should.eql({ name: 'home', params: { s: '3' }});
         });
     });
+
+    it('should trim trailing slashes when building paths', () => {
+        const node = new RouteNode('', '', [
+            new RouteNode('a', '/a', [
+                new RouteNode('b', '/?c')
+            ])
+        ]);
+
+        node.buildPath('a.b', {}, { trailingSlash: false }).should.eql('/a');
+        node.buildPath('a.b', { c: 1 }, { trailingSlash: false }).should.eql('/a?c=1');
+    });
 });