svg-intersection-with-fractional-bounds.html

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This test has a WPT meta file that expects 3 subtest issues.
This WPT test may be referenced by the following Test IDs:
- /intersection-observer/svg-intersection-with-fractional-bounds.html - WPT Dashboard Interop Dashboard

<!DOCTYPE html>

<title>IntersectionObserver observing an SVG &lt;rect> with fractional bounds element</title>

<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>

.spacer {

  height: calc(100vh + 100px);

</style>

<div class="spacer"></div>

<svg viewBox="0 0 200 100" width="4" display="block">

  <rect id="target" x="50" y="5" width="100" height="50" fill="blue"/>

</svg>

<div class="spacer"></div>

<script>

const viewportWidth = document.documentElement.clientWidth;

const viewportHeight = document.documentElement.clientHeight;

setup(() => {

  window.entries = [];

  window.target = document.getElementById("target");

  window.targetRect = target.getBoundingClientRect();

});

var epsilon = 0.0001;

runTestCycle(function() {

  assert_true(!!target, "target exists");

  const observer = new IntersectionObserver(function(changes) {

    entries = entries.concat(changes);

});

  observer.observe(target);

  entries = entries.concat(observer.takeRecords());

  assert_equals(entries.length, 0, "No initial notifications");

  runTestCycle(step0, "Initial Observation");

});

function step0() {

  document.scrollingElement.scrollTop = 300;

  runTestCycle(step1, "Intersection observation after scrolling 300");

  // The numbers in brackets are target client rect; intersection rect;

  // and root bounds.

  checkLastEntry(entries, 0, [

    // the 8 pixels comes from the html body padding.

    1 + 8, 1 + 8 + targetRect.width, 8 + viewportHeight + 100 + 0.1, viewportHeight + 100 + 0.1 + 8 + targetRect.height,

    0, 0, 0, 0,

    0, viewportWidth, 0, viewportHeight,

    false,

  ], epsilon);

function step1() {

  document.scrollingElement.scrollTop = 100;

  runTestCycle(step2, "Intersection observation after scrolling 100");

  checkLastEntry(entries, 1, [

    1 + 8, 1 + 8 + targetRect.width, 8 + viewportHeight - 200 + 0.1, viewportHeight - 200 + 0.1 + 8 + targetRect.height,

    1 + 8, 1 + 8 + targetRect.width, 8 + viewportHeight - 200 + 0.1, viewportHeight - 200 + 0.1 + 8 + targetRect.height,

    0, viewportWidth, 0, viewportHeight,

    true,

  ], epsilon);

function step2() {

  document.scrollingElement.scrollTop = 0;

  checkLastEntry(entries, 2, [

    1 + 8, 1 + 8 + targetRect.width, 8 + viewportHeight + 0.1, viewportHeight + 0.1 + 8 + targetRect.height,

    0, 0, 0, 0,

    0, viewportWidth, 0, viewportHeight,

    false,

  ], epsilon);

</script>