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Add test for restore scroll pos when retainContextWhenHidden is set

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This commit is contained in:
Matt Bierner
2018-10-04 19:01:28 -07:00
parent 54df095e39
commit 3da9a122f6
1 changed files with 44 additions and 3 deletions
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47
extensions/vscode-api-tests/src/singlefolder-tests/webview.test.ts
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@@ -97,6 +97,42 @@ suite('Webview tests', () => {
const secondResponse = await sendRecieveMessage(webview, { type: 'get' });
assert.strictEqual(secondResponse.value, 1);
});
test('webview should preserve position when switching visibility with retainContextWhenHidden', async () => {
const webview = vscode.window.createWebviewPanel(webviewId, 'title', { viewColumn: vscode.ViewColumn.One }, { enableScripts: true, retainContextWhenHidden: true });
webview.webview.html = createHtmlDocumentWithBody(/*html*/`
${'<h1>Header</h1>'.repeat(200)}
<script>
const vscode = acquireVsCodeApi();
setTimeout(() => {
window.scroll(0, 100);
vscode.postMessage({ value: window.scrollY });
}, 500);
window.addEventListener('message', (message) => {
switch (message.data.type) {
case 'get':
vscode.postMessage({ value: window.scrollY });
break;
}
});
</script>`);
const firstResponse = await getWebviewMesssage(webview);
assert.strictEqual(firstResponse.value, 100);
// Swap away from the webview
const doc = await vscode.workspace.openTextDocument(join(vscode.workspace.rootPath || '', './simple.txt'));
await vscode.window.showTextDocument(doc);
// And then back
webview.reveal(vscode.ViewColumn.One);
// We should still have old scroll pos
const secondResponse = await sendRecieveMessage(webview, { type: 'get' });
assert.strictEqual(secondResponse.value, 100);
});
});
function createWebviewWithBody(body: string) {
@@ -121,13 +157,18 @@ function createHtmlDocumentWithBody(body: string): string {
}
function sendRecieveMessage(webview: vscode.WebviewPanel, message: any): Promise<any> {
const p = new Promise<any>(resolve => {
function getWebviewMesssage<T = any>(webview: vscode.WebviewPanel): Promise<T> {
return new Promise<any>(resolve => {
const sub = webview.webview.onDidReceiveMessage(message => {
sub.dispose();
resolve(message);
});
});
}
function sendRecieveMessage<T = any>(webview: vscode.WebviewPanel, message: any): Promise<T> {
const p = getWebviewMesssage(webview);
webview.webview.postMessage(message);
return p;
}
}