Added async-polling definition (#11827)

* Added definition for async-polling

* async-polling tests with noImplicitAny

async-polling/async-polling-tests.ts

@@ -0,0 +1,64 @@
+/// <reference path="async-polling.d.ts" />
+
+import * as AsyncPolling from "async-polling";
+
+// Tests based on examples in https://github.com/cGuille/async-polling#readme
+
+AsyncPolling(end => {
+    end();
+}, 3000).run();
+
+function someAsynchroneProcess(callback: (error?: Error, response?: any) => any): any {
+    callback();
+}
+
+let polling = AsyncPolling(end => {
+    someAsynchroneProcess(function (error, response) {
+        if (error) {
+            end(error);
+            return;
+        }
+
+        end(null, response);
+    });
+}, 3000);
+polling.on("error", (error: Error) => {});
+polling.on("result", (result: any) => {});
+polling.run();
+polling.stop();
+
+AsyncPolling(function(end) {
+    this.stop();
+    end();
+}, 3000).run();
+
+let i = 0;
+
+polling = AsyncPolling(function(end) {
+    ++i;
+    if (i === 3) {
+        return end(new Error("i is " + i));
+    }
+    if (i >= 5) {
+        this.stop();
+        return end(null, `#${i} stop`);
+    }
+    end(null, `#${i} wait a second...`);
+}, 1000);
+
+const eventNames: AsyncPolling.EventName[] = ["run", "start", "end", "schedule", "stop"];
+eventNames.forEach(eventName => {
+    polling.on(eventName, () => {
+        console.log("lifecycle:", eventName);
+    });
+});
+
+polling.on("result", (result: any) => {
+    console.log("result:", result);
+});
+
+polling.on("error", (error: Error) => {
+    console.error("error:", error);
+});
+
+polling.run();

async-polling/async-polling.d.ts

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+// Type definitions for AsyncPolling
+// Project: https://github.com/cGuille/async-polling
+// Definitions by: Zlatko Andonovski <https://github.com/Goldsmith42/>
+// Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
+
+declare module "async-polling" {
+    module AsyncPolling {
+        export type EventName = "run"|"start"|"error"|"result"|"end"|"schedule"|"stop";
+    }
+
+    function AsyncPolling<Result>(pollingFunc: (end: (err?: Error, result?: Result) => any) => any, delay: number): {
+        run: () => any;
+        stop: () => any;
+        on: (eventName: AsyncPolling.EventName, listener: Function) => any;
+    }
+
+    export = AsyncPolling; 
+}