blob: ddf6fece55a48c2bba931b1fcf79cc8f15b0939e [file] [log] [blame]
<!DOCTYPE html>
<meta name="viewport" content="width=device-width,initial-scale=1">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="./resources/intersection-observer-test-utils.js"></script>
<style>
/* Cobalt does not implement HTML5 spec for body margin. */
body {
margin: 8px;
}
pre, #log {
position: absolute;
top: 0;
left: 200px;
}
.spacer {
/* Cobalt does not support calc */
height: 100vh;
}
#target {
width: 0px;
height: 0px;
background-color: green;
/* Adjust for subtracted 100px in class=spacer */
margin-top: 100px;
}
</style>
<div class="spacer"></div>
<div id="target"></div>
<div class="spacer"></div>
<script>
var vw = window.innerWidth;
var vh = window.innerHeight;
var entries = [];
var target;
runTestCycle(function() {
target = document.getElementById("target");
assert_true(!!target, "Target exists");
var observer = new IntersectionObserver(function(changes) {
entries = entries.concat(changes);
window.testRunner.DoNonMeasuredLayout();
});
observer.observe(target);
entries = entries.concat(observer.takeRecords());
assert_equals(entries.length, 0, "No initial notifications.");
runTestCycle(step0, "First rAF");
}, "Observing a zero-area target.");
window.testRunner.DoNonMeasuredLayout();
window.testRunner.DoNonMeasuredLayout();
function step0() {
target.style.marginTop = "-200px";
//document.scrollingElement.scrollTop = 300;
runTestCycle(step1, "document.scrollingElement.scrollTop = 300");
checkLastEntry(entries, 0, [8, 8, vh + 108, vh + 108, 0, 0, 0, 0, 0, vw, 0, vh, false]);
}
function step1() {
target.style.marginTop = "0px";
//document.scrollingElement.scrollTop = 100;
runTestCycle(step2, "document.scrollingElement.scrollTop = 100");
checkLastEntry(entries, 1, [8, 8, vh - 192, vh - 192, 8, 8, vh - 192, vh - 192, 0, vw, 0, vh, true]);
}
function step2() {
target.style.marginTop = "100px";
//document.scrollingElement.scrollTop = 0;
checkLastEntry(entries, 2, [8, 8, vh + 8, vh + 8, 0, 0, 0, 0, 0, vw, 0, vh, false]);
}
</script>