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<!-- This Source Code Form is subject to the terms of the Mozilla Public
- License, v. 2.0. If a copy of the MPL was not distributed with this
<!DOCTYPE HTML>
<html>
<!--
Test trees have the correct scroll position when they are resized.
-->
<head>
<meta charset="utf-8">
<title>Tree component test</title>
<style>
.tree {
height: 50px;
overflow: auto;
display: block;
}
.tree-node {
font-size: 10px;
height: 10px;
}
</style>
</head>
<body>
<pre id="test">
<script src="head.js" type="application/javascript"></script>
<script type="application/javascript">
"use strict";
window.onload = async function() {
try {
const ReactDOM = browserRequire("devtools/client/shared/vendor/react-dom");
const { createFactory } = browserRequire("devtools/client/shared/vendor/react");
const { Simulate } =
browserRequire("devtools/client/shared/vendor/react-dom-test-utils");
const Tree = createFactory(
browserRequire("devtools/client/shared/components/VirtualizedTree"));
const ITEM_HEIGHT = 10;
TEST_TREE.expanded = new Set("ABCDEFGHIJKLMNO".split(""));
function renderTree(props) {
const treeProps = {
...TEST_TREE_INTERFACE,
itemHeight: ITEM_HEIGHT,
onFocus: item => renderTree({ focused: item }),
...props
};
return ReactDOM.render(Tree(treeProps), document.body);
}
const tree = renderTree({ focused: "L" });
const treeEl = tree.refs.tree;
is(tree.state.scroll, 0, "Scroll position should be 0 by default");
is(treeEl.scrollTop, 0, "Tree scrollTop should be 0 by default");
info(`Focus on the next node and scroll by ${ITEM_HEIGHT}`);
Simulate.keyDown(treeEl, { key: "ArrowDown" });
await forceRender(tree);
is(tree.state.scroll, ITEM_HEIGHT, `Scroll position should now be ${ITEM_HEIGHT}`);
is(treeEl.scrollTop, ITEM_HEIGHT,
`Tree scrollTop should now be ${ITEM_HEIGHT}`);
info("Simulate window resize along with scroll back to top");
treeEl.scrollTo({ left: 0, top: 0 });
window.dispatchEvent(new Event("resize"));
await forceRender(tree);
is(tree.state.scroll, ITEM_HEIGHT,
`Scroll position should remain at ${ITEM_HEIGHT}`);
is(treeEl.scrollTop, ITEM_HEIGHT,
`Tree scrollTop should remain at ${ITEM_HEIGHT}`);
} catch (e) {
ok(false, "Got an error: " + DevToolsUtils.safeErrorString(e));
} finally {
SimpleTest.finish();
}
};
</script>
</pre>
</body>
</html>