1588982 - [wpt-sync] Sync PR 19719 - [CSS] Add tests to ensure that ::part does not override !import styles.

Status: RESOLVED FIXED

(Core :: CSS Parsing and Computation, task, P4)

Description

[Web Platform Test Sync Bot (Matrix: #interop:mozilla.org)]

Sync web-platform-tests PR 19719 into mozilla-central (this bug is closed when the sync is complete).

PR: https://github.com/web-platform-tests/wpt/pull/19719
Details from upstream follow.

Fergal Daly <[e-mail]> wrote:

[CSS] Add tests to ensure that ::part does not override !import styles.

Bug: 1014400
Change-Id: If73f8280d0370e93f633f2460b744b073798090a
Reviewed-on: https://chromium-review.googlesource.com/1863059
WPT-Export-Revision: 60e9555fd62be86934ff48b02caec369a1a14019

Comment 1

[Web Platform Test Sync Bot (Matrix: #interop:mozilla.org)]

Pushed to try (stability) https://treeherder.mozilla.org/#/jobs?repo=try&revision=29df4d887a0b5a3985d9172f8d316d33855dbfe1

Comment 2

[Web Platform Test Sync Bot (Matrix: #interop:mozilla.org)]

## GitHub CI Results
wpt.fyi [PR Results](https://wpt.fyi/results/?sha=7abd3712cd2df5489d9b81fe5944f2085c00bf17&label=pr_head) [Base Results](https://wpt.fyi/results/?sha=7abd3712cd2df5489d9b81fe5944f2085c00bf17&label=pr_base)

Ran 3 tests and 3 subtests

### Firefox
  OK  : 3
  PASS: 2
  FAIL: 1

### Chrome
  OK  : 3
  PASS: 3

### Safari
  OK  : 3
  PASS: 3

### Firefox-only failures

/css/css-shadow-parts/simple-important-important.html
   Part in selected host is styled: Firefox: FAIL

Comment 3

[Pulsebot]

Pushed by [e-mail]:
https://hg.mozilla.org/integration/mozilla-inbound/rev/42692561c720
[wpt PR 19719] - [CSS] Add tests to ensure that ::part does not override !important styles., a=testonly
https://hg.mozilla.org/integration/mozilla-inbound/rev/3b2c1a34ce3a
[wpt PR 19719] - Update wpt metadata, a=testonly

Comment 4

[Alexandru Michis [:malexandru]]

https://hg.mozilla.org/mozilla-central/rev/42692561c720
https://hg.mozilla.org/mozilla-central/rev/3b2c1a34ce3a