fix(AbstractHistory): Fix router.back in abstract mode

Fix abstract mode's router.back() when 2 consecutive same routes appear in the history stack array

fix #2607

src/history/abstract.js

@@ -37,6 +37,10 @@ export class AbstractHistory extends History {
  this.confirmTransition(route, () => {
  this.index = targetIndex
  this.updateRoute(route)
+ }, (err) => {
+ if (err === 'SAME_ROUTE') {
+ this.index = targetIndex
+ }
  })
  }
 

src/history/base.js

@@ -103,7 +103,7 @@ export class History {
  route.matched.length === current.matched.length
  ) {
  this.ensureURL()
- return abort()
+ return abort('SAME_ROUTE')
  }
 
  const {

test/unit/specs/node.spec.js

@@ -35,4 +35,21 @@ describe('Usage in Node', () => {
  expect(router.getMatchedComponents('/')).toEqual([Foo])
  expect(router.getMatchedComponents('/bar/baz')).toEqual([Bar, Baz])
  })
+
+ it('should navigate through history with same consecutive routes in history stack', () => {
+ const router = new VueRouter({
+ routes: [
+ { path: '/', component: { name: 'foo' }},
+ { path: '/bar', component: { name: 'bar' }}
+ ]
+ })
+ router.push('/')
+ router.push('/bar')
+ router.push('/')
+ router.replace('/bar')
+ router.back()
+ expect(router.history.current.path).toBe('/bar')
+ router.back()
+ expect(router.history.current.path).toBe('/')
+ })
 })