test('Cannot register multiple serializers for the same view type', async () => {
const viewType = 'view.type';
const shape = createNoopMainThreadWebviews();
const extHostWebviews = new ExtHostWebviews(SingleProxyRPCProtocol(shape));
let lastInvokedDeserializer: vscode.WebviewPanelSerializer | undefined = undefined;
class NoopSerializer implements vscode.WebviewPanelSerializer {
async deserializeWebviewPanel(_webview: vscode.WebviewPanel, _state: any): Promise<void> {
lastInvokedDeserializer = this;
}
}
const serializerA = new NoopSerializer();
const serializerB = new NoopSerializer();
const serializerARegistration = extHostWebviews.registerWebviewPanelSerializer(viewType, serializerA);
await extHostWebviews.$deserializeWebviewPanel('x', viewType, 'title', {}, 0 as EditorViewColumn, {});
assert.strictEqual(lastInvokedDeserializer, serializerA);
assert.throws(
() => extHostWebviews.registerWebviewPanelSerializer(viewType, serializerB),
'Should throw when registering two serializers for the same view');
serializerARegistration.dispose();
extHostWebviews.registerWebviewPanelSerializer(viewType, serializerB);
await extHostWebviews.$deserializeWebviewPanel('x', viewType, 'title', {}, 0 as EditorViewColumn, {});
assert.strictEqual(lastInvokedDeserializer, serializerB);
});
() => extHostWebviews.registerWebviewPanelSerializer(viewType, serializerB),
() => extHostWebviews.registerWebviewEditorSerializer(viewType, serializerB),