Summary

Harness status: Error

Test named 'A view transition should be immediately skipped if started when document is hidden' specified 1 'cleanup' function, and 1 failed.
Error: set_window_rect() is not implemented by testdriver-vendor.js
    at Object.set_window_rect (https://www1.wpt.live/resources/testdriver.js:1721:19)
    at Object.set_window_rect (https://www1.wpt.live/resources/testdriver.js:709:48)
    at restore (https://www1.wpt.live/page-visibility/resources/window_state_context.js:14:23)
    at https://www1.wpt.live/page-visibility/resources/window_state_context.js:6:13
    at https://www1.wpt.live/resources/testharness.js:3027:34
    at forEach (https://www1.wpt.live/resources/testharness.js:4667:26)
    at Test.cleanup (https://www1.wpt.live/resources/testharness.js:3022:9)
    at Test.done (https://www1.wpt.live/resources/testharness.js:2986:14)
    at Test.step (https://www1.wpt.live/resources/testharness.js:2653:18)
    at https://www1.wpt.live/resources/testharness.js:2689:35

Found 3 tests

Details

ResultTest NameMessage
FailA view transition should be immediately skipped if started when document is hiddenpromise_test: Unhandled rejection with value: object "Error: minimize_window() is not implemented by testdriver-vendor.js"
Error
    at get_stack (https://www1.wpt.live/resources/testharness.js:4575:21)
    at new AssertionError (https://www1.wpt.live/resources/testharness.js:4568:22)
    at assert (https://www1.wpt.live/resources/testharness.js:4552:19)
    at Test.<anonymous> (https://www1.wpt.live/resources/testharness.js:764:29)
    at Test.step (https://www1.wpt.live/resources/testharness.js:2642:25)
    at https://www1.wpt.live/resources/testharness.js:2689:35
Asserts run
Pass
assert_implements(function "function startViewTransition() { [native code] }", "Missing document.startViewTransition")
    at Test.<anonymous> ( /css/css-view-transitions/transition-in-hidden-page.html:18:7)
Not RunA view transition should be skipped when a document becomes hidden while processing update callback
Asserts runNo asserts ran
Not RunA view transition should be skipped when a document becomes hidden while animating
Asserts runNo asserts ran