Added new package @types/artillery (#20779)

* Artillery types for beforeRequest & afterResponse hooks

* Remove unnecessary linting rule in Artillery project

* Update Artillery tests to define variables to ensure proper compilation usage

* Fix compilation errors in test & move typescript decl to line 5

types/artillery/artillery-tests.ts

@@ -0,0 +1,13 @@
+import { ScenarioContext, Next } from 'artillery';
+
+const scenarioContext: ScenarioContext = {vars: {}};
+scenarioContext.vars = {};
+scenarioContext.vars.testing = "value";
+scenarioContext.vars.testing2 = 1;
+
+const next: Next = (error?: Error) => {
+    // do nothing.
+};
+
+next();
+next(new Error());

types/artillery/index.d.ts

@@ -0,0 +1,13 @@
+// Type definitions for artillery 1.6
+// Project: https://github.com/shoreditch-ops/artillery#readme
+// Definitions by: Kira McCoan <https://github.com/kmccoan-allocadia>
+// Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
+// TypeScript Version: 2.2
+import * as request from 'request';
+import * as events from 'events';
+
+export interface ScenarioContext { vars: {[key: string]: any}; }
+export type Next = (err?: Error) => void;
+export type ResponseRequest = request.ResponseRequest;
+export type RequestResponse = request.RequestResponse;
+export type EventEmitter = events.EventEmitter;

types/artillery/tsconfig.json

@@ -0,0 +1,23 @@
+{
+    "compilerOptions": {
+        "module": "commonjs",
+        "lib": [
+            "es6"
+        ],
+        "noImplicitAny": true,
+        "noImplicitThis": true,
+        "strictNullChecks": true,
+        "strictFunctionTypes": true,
+        "baseUrl": "../",
+        "typeRoots": [
+            "../"
+        ],
+        "types": [],
+        "noEmit": true,
+        "forceConsistentCasingInFileNames": true
+    },
+    "files": [
+        "index.d.ts",
+        "artillery-tests.ts"
+    ]
+}

types/artillery/tslint.json

@@ -0,0 +1,3 @@
+{
+    "extends": "dtslint/dt.json"
+}