Cannot be used in integration tests (`setupRenderingTest`)

[Jan Buschtöns]

The <LinkTo> component is backed by the private -routing service, which has explicit short-circuit logic to detect when it is being run in an integration / render test.

When you use <Link> in a render test, you currently get this error:

Uncaught (in promise) TypeError: Cannot read property 'generate' of undefined
    at Class.generate (router.js:479)
    at RouterService.urlFor (router.js:200)
    at LinkComponent.get href [as href] (component.js:78)
    at getPossibleMandatoryProxyValue (metal.js:2532)
    at get (metal.js:2612)
    at glimmer.js:507
    at track (metal.js:2498)
    at RootPropertyReference.compute (glimmer.js:506)
    at RootPropertyReference.value (glimmer.js:374)
    at ComponentElementOperations.flush (runtime.js:1584)

This is because RouterService#urlFor delegates to the system's Router#generate method, which expects _routerMicrolib to be initialized, which it is only in application / acceptance tests.

/cc @Charizard

[Jan Buschtöns]

Fixed in v1.0.2! 🎉