third_party/WebKit/LayoutTests/intersection-observer/zero-area-element-visible.html - Issue 2560253004: IntersectionObserver: convert tests to testharness.js

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Side by Side Diff: third_party/WebKit/LayoutTests/intersection-observer/zero-area-element-visible.html

Issue 2560253004: IntersectionObserver: convert tests to testharness.js (Closed)

Patch Set: Address comments Created 3 years, 11 months ago

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1 <!DOCTYPE html>	1 <!DOCTYPE html>

2 <script src="../resources/intersection-observer-helper-functions.js"></script>

3 <script src="../resources/testharness.js"></script>	2 <script src="../resources/testharness.js"></script>

4 <script src="../resources/testharnessreport.js"></script>	3 <script src="../resources/testharnessreport.js"></script>

	4 <script src="./resources/intersection-observer-test-utils.js"></script>

5	5

6 <title>Ensure that a visible zero-area element is given the correct intersection ratio</title>	6 <style>

	7 pre, #log {

	8 position: absolute;

	9 top: 0;

	10 left: 200px;

	11 }

	12 #target {

	13 width: 0px;

	14 height: 0px;

	15 }

	16 </style>

7	17

8 <div id='target' style='width: 0px; height: 0px'</div>"	18 <div id='target'></div>

9	19

10 <script>	20 <script>

11 'use strict';	21 var entries = [];

12	22

13 async_test(t => {	23 runTestCycle(function() {

14 let target = document.getElementById('target');	24 assert_equals(window.innerWidth, 800, "Window must be 800 pixels wide.");

15 let entries = [];	25 assert_equals(window.innerHeight, 600, "Window must be 600 pixels high.");

16 new IntersectionObserver(changes => {	26

17 entries.push(...changes);	27 var target = document.getElementById('target');

18 }).observe(target);	28 assert_true(!!target, "target exists");

19 waitForNotification(t.step_func_done(() => {	29 var observer = new IntersectionObserver(function(changes) {

20 assert_equals(entries.length, 1);	30 entries = entries.concat(changes)

21 assert_equals(entries[0].intersectionRatio, 1);	31 });

22 }));	32 observer.observe(target);

23 });	33 entries = entries.concat(observer.takeRecords());

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

	35 runTestCycle(step0, "First rAF should generate a notification.");

	36 }, "Ensure that a zero-area target intersecting root generates a notification wi th intersectionRatio == 1");

	37

	38 function step0() {

	39 assert_equals(entries.length, 1, "One notification.");

	40 assert_equals(entries[0].intersectionRatio, 1, "intersectionRatio == 1");

	41 }

24 </script>	42 </script>

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