SAP Spartacus里的路由机制共同有4种：
When Spartacus is launched, the route is handled by the router logic. There are 4 different types of routing that will be evaluated:
(1) the route should be handled by a custom router path; the customer has added hard-coded routes, and we should prioritise those.
(2) the route is either a PLP or PDP
(3) the route is a CMS content page
(4) the route is unknown (404 not found)
如果一个并不存在的url传递给Spartacus，会被当成content page处理，Spartacus会使用CMS API去读取该url对应的content page.
If the CMS cannot find a matching content page, it will respond with a 404 error. Spartacus will handle this 404 error, and redirect the user (under the hood) to the not found CMS page.
如果CMS返回404错误，Spartacus会显示CMS里model的not found CMS页面。
结果：显示not found页面
步骤如下：
navigation start：
app.module.ts:115 Jerry: NavigationStart(id: 1, url: ‘powertools-spa/en/USD/jerry’)
第二步：
Jerry: RoutesRecognized(id: 1, url: ‘powertools-spa/en/USD/jerry’, urlAfterRedirects: ‘powertools-spa/en/USD/jerry’, state: Route(url:’’, path:’’) { Route(url:‘jerry’, path:’**’) } )
第三步：
Jerry: GuardsCheckStart(id: 1, url: ‘powertools-spa/en/USD/jerry’, urlAfterRedirects: ‘powertools-spa/en/USD/jerry’, state: Route(url:’’, path:’’) { Route(url:‘jerry’, path:’**’) } )
第四步：
Jerry: ChildActivationStart(path: ‘’)
app.module.ts:115 Jerry: ActivationStart(path: ‘**’)
404错误：
id为jerry的content page不存在，但是not-found content page存在：