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Mark two test cases from changing-scroll-snap-align.html as tentative.
These were added for nested snap work on crbug.com/1467300, but the behavior is subject to an open spec issue as discussed at: web-platform-tests/interop#602 Bug: 1505893 Change-Id: Iaf9783f7220acc5eeb19387e57f6ec3f88bc19e2
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css/css-scroll-snap/snap-after-relayout/changing-scroll-snap-align-nested.tentative.html
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,119 @@ | ||
| <!DOCTYPE html> | ||
| <title> | ||
| Updating the snap alignment of a snap container's content should make the snap | ||
| container resnap accordingly. | ||
| </title> | ||
| <link rel="help" href="https://drafts.csswg.org/css-scroll-snap/#re-snap" /> | ||
| <script src="/resources/testharness.js"></script> | ||
| <script src="/resources/testharnessreport.js"></script> | ||
| <style> | ||
| div { | ||
| position: absolute; | ||
| margin: 0; | ||
| } | ||
|
|
||
| #scroller { | ||
| height: 200px; | ||
| width: 200px; | ||
| overflow: hidden; | ||
| scroll-snap-type: both mandatory; | ||
| } | ||
|
|
||
| #initial-target { | ||
| width: 300px; | ||
| height: 300px; | ||
| top: 100px; | ||
| left: 100px; | ||
| background-color: green; | ||
| scroll-snap-align: start; | ||
| } | ||
|
|
||
| #other-target { | ||
| width: 300px; | ||
| height: 300px; | ||
| top: 300px; | ||
| left: 300px; | ||
| background-color: red; | ||
| scroll-snap-align: start; | ||
| } | ||
|
|
||
| .area { | ||
| width: 2000px; | ||
| height: 2000px; | ||
| } | ||
|
|
||
| .snap-area { | ||
| scroll-snap-align: start !important; | ||
| } | ||
| </style> | ||
|
|
||
| <div id="scroller"> | ||
| <div class="area"></div> | ||
| <div id="initial-target"></div> | ||
| <div id="other-target"></div> | ||
| </div> | ||
|
|
||
| <script> | ||
| const initial_target = document.getElementById("initial-target"); | ||
| const other_target = document.getElementById("other-target"); | ||
| const scroller = document.getElementById("scroller"); | ||
|
|
||
| function cleanup() { | ||
| initial_target.style.setProperty("scroll-snap-align", "start"); | ||
| other_target.style.setProperty("scroll-snap-align", "start"); | ||
| initial_target.removeAttribute("class"); | ||
| } | ||
|
|
||
| test(t => { | ||
| t.add_cleanup(cleanup); | ||
| scroller.scrollTo(0,0); | ||
| assert_equals(scroller.scrollTop, 100); | ||
| assert_equals(scroller.scrollLeft, 100); | ||
|
|
||
| initial_target.style.setProperty("scroll-snap-align", "end"); | ||
| // scroller maintains scroll position which is still valid as the target's | ||
| // snap area covers the snap port. | ||
| assert_equals(scroller.scrollTop, 100); | ||
| assert_equals(scroller.scrollLeft, 100); | ||
| }, "Changing a large target's snap alignment shouldn't make the scroller" + | ||
| " resnap if the scroller is already in a valid snap position."); | ||
|
|
||
| // Similar to above test case except targets are too small to cover snap port, | ||
| // so scroller must snap in response to change in scroll-snap-align. | ||
| test(t => { | ||
| t.add_cleanup(cleanup); | ||
| const initial_target_height = initial_target.offsetHeight; | ||
| const initial_target_width = initial_target.offsetWidth; | ||
| const other_target_height = initial_target.offsetHeight; | ||
| const other_target_width = initial_target.offsetWidth; | ||
| t.add_cleanup(() => { | ||
| initial_target.style.setProperty("height", `${initial_target_height}px`); | ||
| initial_target.style.setProperty("width", `${initial_target_width}px`); | ||
| other_target.style.setProperty("height", `${other_target_height}px`); | ||
| other_target.style.setProperty("width", `${other_target_width}px`); | ||
| }) | ||
| scroller.scrollTo(0,0); | ||
| assert_equals(scroller.scrollTop, 100); | ||
| assert_equals(scroller.scrollLeft, 100); | ||
|
|
||
| initial_target.style.setProperty("height", `${scroller.clientHeight * 2/3 }px`); | ||
| initial_target.style.setProperty("width", `${scroller.clientWidth * 2/3 }px`); | ||
| other_target.style.setProperty("height", `${scroller.clientHeight * 2/3 }px`); | ||
| other_target.style.setProperty("width", `${scroller.clientWidth * 2/3 }px`); | ||
|
|
||
| // scroll (and snap) to top left of other target. | ||
| scroller.scrollTo(other_target.offsetTop, | ||
| other_target.offsetLeft); | ||
| assert_equals(scroller.scrollTop, other_target.offsetTop,); | ||
| assert_equals(scroller.scrollLeft, other_target.offsetLeft); | ||
|
|
||
| other_target.style.setProperty("scroll-snap-align", "end"); | ||
| // should be scrolled so as to align scroller's bottom-right with | ||
| // other_target's bottom-right. | ||
| assert_equals(scroller.scrollTop, | ||
| other_target.offsetTop + other_target.offsetHeight - scroller.clientHeight); | ||
| assert_equals(scroller.scrollLeft, | ||
| other_target.offsetLeft + other_target.offsetWidth - scroller.clientWidth); | ||
| }, "Changing the current (non-covering) target's snap alignment should make " + | ||
| "the scroller snap according to the new alignment."); | ||
| </script> |
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