Fix malformed change weblinks generation

Followup to I0d9de3a2.

Bug: Issue 5316
Change-Id: I849ab176161512130b60f2ac4775fc1f365fe426
(cherry picked from commit 5c390ad9f7)

polygerrit-ui/app/elements/core/gr-router/gr-router.js

@@ -324,14 +324,10 @@
       if (!weblinks || !weblinks.length) return [];
       return weblinks.filter(weblink => !this._isDirectCommit(weblink)).map(
           ({name, url}) => {
-            if (url.startsWith('https:') || url.startsWith('http:')) {
+            if (!url.startsWith('https:') && !url.startsWith('http:')) {
-              return {name, url};
+              url = this.getBaseUrl() + (url.startsWith('/') ? '' : '/') + url;
-            } else {
-              return {
-                name,
-                url: `../../${url}`,
-              };
             }
+            return {name, url};
           });
     },
 

polygerrit-ui/app/elements/core/gr-router/gr-router_test.html

@@ -44,6 +44,23 @@ limitations under the License.
 
     teardown(() => { sandbox.restore(); });
 
+    test('_getChangeWeblinks', () => {
+      sandbox.stub(element, '_isDirectCommit').returns(false);
+      sandbox.stub(element, 'getBaseUrl').returns('base');
+      const link = {name: 'test', url: 'test/url'};
+      const mapLinksToConfig = weblink => ({options: {weblinks: [weblink]}});
+      assert.deepEqual(element._getChangeWeblinks(mapLinksToConfig(link))[0],
+          {name: 'test', url: 'base/test/url'});
+
+      link.url = '/' + link.url;
+      assert.deepEqual(element._getChangeWeblinks(mapLinksToConfig(link))[0],
+          {name: 'test', url: 'base/test/url'});
+
+      link.url = 'https:/' + link.url;
+      assert.deepEqual(element._getChangeWeblinks(mapLinksToConfig(link))[0],
+          {name: 'test', url: 'https://test/url'});
+    });
+
     test('_getHashFromCanonicalPath', () => {
       let url = '/foo/bar';
       let hash = element._getHashFromCanonicalPath(url);