angular-docs-cn/modules/@angular/router-deprecated/test/integration/README.md

Router integration tests

These tests only mock out Location, and otherwise use all the real parts of routing to ensure that various routing scenarios work as expected.

The Component Router in Angular 2 exposes only a handful of different options, but because they can be combined and nested in so many ways, it's difficult to rigorously test all the cases.

The address this problem, we introduce describeRouter, describeWith, and describeWithout.