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// @strict: true
// @lib: es6
type Page = {close(): Promise<void>; content(): Promise<string>};
type Browser = {close(): Promise<void>};
declare function test1(): Promise<Browser>;
declare function test2(obj: Browser): Promise<Page>;
async function test(): Promise<string> {
let browser: Browser | undefined = undefined;
let page: Page | undefined = undefined;
try {
browser = await test1();
page = await test2(browser);
return await page.content();;
} finally {
if (page) {
await page.close(); // ok
}
if (browser) {
await browser.close(); // ok
}
}
}
declare class Aborter { abort(): void };
class Foo {
abortController: Aborter | undefined = undefined;
async operation() {
if (this.abortController !== undefined) {
this.abortController.abort();
this.abortController = undefined;
}
try {
this.abortController = new Aborter();
} catch (error) {
if (this.abortController !== undefined) {
this.abortController.abort(); // ok
}
}
}
}
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