offer exit on driver

test/smoke/src/application.ts

@@ -89,6 +89,7 @@ export class Application {
 
 	async stop(): Promise<any> {
 		if (this._code) {
+			await this._code.exit();
 			this._code.dispose();
 			this._code = undefined;
 		}

test/smoke/src/vscode/code.ts

@@ -64,7 +64,7 @@ async function connect(child: cp.ChildProcess, outPath: string, handlePath: stri
 	while (true) {
 		try {
 			const { client, driver } = await connectDriver(outPath, handlePath);
-			return new Code(child, client, driver, logger);
+			return new Code(client, driver, logger);
 		} catch (err) {
 			if (++errCount > 50) {
 				child.kill();
@@ -188,7 +188,6 @@ export class Code {
 	private driver: IDriver;
 
 	constructor(
-		private process: cp.ChildProcess,
 		private client: IDisposable,
 		driver: IDriver,
 		readonly logger: Logger
@@ -230,6 +229,10 @@ export class Code {
 		await this.driver.reloadWindow(windowId);
 	}
 
+	async exit(): Promise<void> {
+		await this.driver.exitApplication();
+	}
+
 	async waitForTextContent(selector: string, textContent?: string, accept?: (result: string) => boolean): Promise<string> {
 		const windowId = await this.getActiveWindowId();
 		accept = accept || (result => textContent !== void 0 ? textContent === result : !!result);
@@ -302,7 +305,6 @@ export class Code {
 
 	dispose(): void {
 		this.client.dispose();
-		this.process.kill();
 	}
 }