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LibWeb: Prevent calling test() twice

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Calling test() multiple times in the same test file is not actually
valid, and can cause the following test to hang forever. So let's stop
doing that in the one test that did so, and also prevent the same
mistake happening again. :^)

Throwing an exception on subsequent test() calls means that we don't
hang, the test will fail with missing output, and we get a log message
explaining why.
This commit is contained in:
Sam Atkins 2023-12-22 14:27:14 +00:00 committed by Andreas Kling
parent 99fc3c7551
commit 1e6cd19b28
Notes: sideshowbarker 2024-07-17 18:46:30 +09:00 
Author: https://github.com/AtkinsSJ
Commit: https://github.com/SerenityOS/serenity/commit/1e6cd19b28
Pull-request: https://github.com/SerenityOS/serenity/pull/22391
Reviewed-by: https://github.com/kalenikaliaksandr
Reviewed-by: https://github.com/trflynn89
2 changed files with 16 additions and 7 deletions
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10
Tests/LibWeb/Text/input/get-bounding-client-rect.html
View File

@ -13,12 +13,10 @@
<script src="include.js"></script>
<script>
test(() => {
const rect = document.getElementById("box").getBoundingClientRect();
println(JSON.stringify(rect));
});
const box_rect = document.getElementById("box").getBoundingClientRect();
println(JSON.stringify(box_rect));
test(() => {
const rect = document.getElementById("inline").getBoundingClientRect();
println(JSON.stringify(rect));
const inline_rect = document.getElementById("inline").getBoundingClientRect();
println(JSON.stringify(inline_rect));
});
</script>

13
Tests/LibWeb/Text/input/include.js
View File

@ -1,4 +1,11 @@
var __outputElement = null;
let __alreadyCalledTest = false;
function __preventMultipleTestFunctions() {
if (__alreadyCalledTest) {
throw new Error("You must only call test() or asyncTest() once per page");
}
__alreadyCalledTest = true;
}
if (globalThis.internals === undefined) {
internals = {
@ -17,6 +24,7 @@ document.addEventListener("DOMContentLoaded", function () {
});
function test(f) {
__preventMultipleTestFunctions();
document.addEventListener("DOMContentLoaded", f);
window.addEventListener("load", () => {
internals.signalTextTestIsDone();
@ -24,7 +32,10 @@ function test(f) {
}
function asyncTest(f) {
const done = () => internals.signalTextTestIsDone();
const done = () => {
__preventMultipleTestFunctions();
internals.signalTextTestIsDone();
};
document.addEventListener("DOMContentLoaded", () => {
f(done);
});