[BUGFIX] {{link-to}} before application boot #11639
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This was initially targeted at the beta channel because @tomdale was not super confident with this change. I'm not opposed to pulling it into stable, but he should definitely chime in... |
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The consequence of leaving this as a 2.0-only solution is that we can't have any tests of components with {{link-to}} inside of 1.13. I'm actually surprised that there hasn't been a more-general revolt about the inability to test components with links in them in 1.13... and if that means very few people are moving to 1.13 yet, or they aren't testing... |
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Previously, {{link-to}} would work even if the application had not been
booted completely. This behavior is relied on by test harnesses like
ember-qunit, since an “integration test” of a component may include a
template that uses {{link-to}}. Many people have discovered that they
would like to test a component that has a link without booting the
entire app.
> You wanted a banana but what you got was a gorilla holding the banana
> and the entire jungle. –Joe Armstrong
During the Glimmer work, we refactored the interface between the
LinkComponent and the router into a service. Unfortunately, this
caused a regression where rendering the link before the router was
completely initialized would raise an exception.
This commit adds a very stupid guard to ensure that we have enough
router state to determine if a link is active or not. This whole path
could be significantly cleaned up, and in particular, we should move
towards using a stubbed routing service in tests that encapsulates all
of these concerns.
Conflicts:
packages/ember/tests/helpers/link_to_test.js
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Tests are coming separately based on my self-destructing reproduction so that I can more easily land them in both master and stable. |
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👍 |
nathanhammond
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Assuming tests pass this is good to land now, it includes a test for the last scenario. I don't believe that an acceptance test for this is required at this point. |
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Restarted sauce labs job. |
[BUGFIX] {{link-to}} before application boot
Previously, {{link-to}} would work even if the application had not been
booted completely. This behavior is relied on by test harnesses like
ember-qunit, since an “integration test” of a component may include a
template that uses {{link-to}}. Many people have discovered that they
would like to test a component that has a link without booting the
entire app.
During the Glimmer work, we refactored the interface between the
LinkComponent and the router into a service. Unfortunately, this
caused a regression where rendering the link before the router was
completely initialized would raise an exception.
This commit adds a very stupid guard to ensure that we have enough
router state to determine if a link is active or not. This whole path
could be significantly cleaned up, and in particular, we should move
towards using a stubbed routing service in tests that encapsulates all
of these concerns.
Conflicts:
packages/ember/tests/helpers/link_to_test.js