Function WaitEvent

test/utils.ts:119–131

(
    event: vscode.Event<TResult>,
    filter?: (event: TResult) => boolean | undefined,
)

 * @returns A promise that resolves when the specified event is fired with the TResult subject of the event. If a filter is specified, the promise will not resolve until the filter returns true.
 */
export function WaitEvent<TResult>(
    event: vscode.Event<TResult>,
    filter?: (event: TResult) => boolean | undefined,
): Promise<TResult> {
    return new Promise<TResult>((resolve) => {
        const listener = event((result: TResult) => {
            if (!filter || filter(result)) {
                listener.dispose();
                resolve(result);
            }
        });
    });
}