angular-cn/packages/router/test/create_router_state.spec.ts

147 lines
5.0 KiB
TypeScript

/**
* @license
* Copyright Google Inc. All Rights Reserved.
*
* Use of this source code is governed by an MIT-style license that can be
* found in the LICENSE file at https://angular.io/license
*/
import {Routes} from '../src/config';
import {createRouterState} from '../src/create_router_state';
import {recognize} from '../src/recognize';
import {DefaultRouteReuseStrategy} from '../src/route_reuse_strategy';
import {ActivatedRoute, advanceActivatedRoute, createEmptyState, RouterState, RouterStateSnapshot} from '../src/router_state';
import {PRIMARY_OUTLET} from '../src/shared';
import {DefaultUrlSerializer, UrlSegmentGroup, UrlTree} from '../src/url_tree';
import {TreeNode} from '../src/utils/tree';
describe('create router state', () => {
const reuseStrategy = new DefaultRouteReuseStrategy();
const emptyState = () =>
createEmptyState(new (UrlTree as any)(new UrlSegmentGroup([], {}), {}, null!), RootComponent);
it('should create new state', () => {
const state = createRouterState(
reuseStrategy,
createState(
[
{path: 'a', component: ComponentA},
{path: 'b', component: ComponentB, outlet: 'left'},
{path: 'c', component: ComponentC, outlet: 'right'}
],
'a(left:b//right:c)'),
emptyState());
checkActivatedRoute(state.root, RootComponent);
const c = (state as any).children(state.root);
checkActivatedRoute(c[0], ComponentA);
checkActivatedRoute(c[1], ComponentB, 'left');
checkActivatedRoute(c[2], ComponentC, 'right');
});
it('should reuse existing nodes when it can', () => {
const config = [
{path: 'a', component: ComponentA}, {path: 'b', component: ComponentB, outlet: 'left'},
{path: 'c', component: ComponentC, outlet: 'left'}
];
const prevState =
createRouterState(reuseStrategy, createState(config, 'a(left:b)'), emptyState());
advanceState(prevState);
const state = createRouterState(reuseStrategy, createState(config, 'a(left:c)'), prevState);
expect(prevState.root).toBe(state.root);
const prevC = (prevState as any).children(prevState.root);
const currC = (state as any).children(state.root);
expect(prevC[0]).toBe(currC[0]);
expect(prevC[1]).not.toBe(currC[1]);
checkActivatedRoute(currC[1], ComponentC, 'left');
});
it('should handle componentless routes', () => {
const config = [{
path: 'a/:id',
children:
[{path: 'b', component: ComponentA}, {path: 'c', component: ComponentB, outlet: 'right'}]
}];
const prevState = createRouterState(
reuseStrategy, createState(config, 'a/1;p=11/(b//right:c)'), emptyState());
advanceState(prevState);
const state =
createRouterState(reuseStrategy, createState(config, 'a/2;p=22/(b//right:c)'), prevState);
expect(prevState.root).toBe(state.root);
const prevP = (prevState as any).firstChild(prevState.root)!;
const currP = (state as any).firstChild(state.root)!;
expect(prevP).toBe(currP);
const currC = (state as any).children(currP);
expect(currP._futureSnapshot.params).toEqual({id: '2', p: '22'});
expect(currP._futureSnapshot.paramMap.get('id')).toEqual('2');
expect(currP._futureSnapshot.paramMap.get('p')).toEqual('22');
checkActivatedRoute(currC[0], ComponentA);
checkActivatedRoute(currC[1], ComponentB, 'right');
});
it('should cache the retrieved routeReuseStrategy', () => {
const config = [
{path: 'a', component: ComponentA}, {path: 'b', component: ComponentB, outlet: 'left'},
{path: 'c', component: ComponentC, outlet: 'left'}
];
spyOn(reuseStrategy, 'retrieve').and.callThrough();
const prevState =
createRouterState(reuseStrategy, createState(config, 'a(left:b)'), emptyState());
advanceState(prevState);
// Expect 2 calls as the baseline setup
expect(reuseStrategy.retrieve).toHaveBeenCalledTimes(2);
// This call should produce a reused activated route
const state = createRouterState(reuseStrategy, createState(config, 'a(left:c)'), prevState);
// Verify the retrieve method has been called one more time
expect(reuseStrategy.retrieve).toHaveBeenCalledTimes(3);
});
});
function advanceState(state: RouterState): void {
advanceNode((state as any)._root);
}
function advanceNode(node: TreeNode<ActivatedRoute>): void {
advanceActivatedRoute(node.value);
node.children.forEach(advanceNode);
}
function createState(config: Routes, url: string): RouterStateSnapshot {
let res: RouterStateSnapshot = undefined!;
recognize(RootComponent, config, tree(url), url).forEach(s => res = s);
return res;
}
function checkActivatedRoute(
actual: ActivatedRoute, cmp: Function, outlet: string = PRIMARY_OUTLET): void {
if (actual === null) {
expect(actual).toBeDefined();
} else {
expect(actual.component as any).toBe(cmp);
expect(actual.outlet).toEqual(outlet);
}
}
function tree(url: string): UrlTree {
return new DefaultUrlSerializer().parse(url);
}
class RootComponent {}
class ComponentA {}
class ComponentB {}
class ComponentC {}