Add types for serverless-jest-plugin. (#42412)

* Add types for lambda-wrapper.

* Add types for serverless-jest-plugin.

types/serverless-jest-plugin/index.d.ts

@@ -0,0 +1,23 @@
+// Type definitions for serverless-jest-plugin 0.3
+// Project: https://github.com/nordcloud/serverless-jest-plugin#readme
+// Definitions by: Gaelan Steele <https://github.com/Gaelan>
+// Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
+// Minimum TypeScript Version: 3.3
+
+import Serverless = require('serverless');
+import Plugin = require('serverless/classes/Plugin');
+import lw = require('lambda-wrapper');
+export = ServerlessJestPlugin;
+
+declare class ServerlessJestPlugin implements Plugin {
+    constructor(serverless: Serverless, options: Serverless.Options);
+
+    hooks: Plugin.Hooks;
+    commands: Plugin.Commands;
+}
+
+declare namespace ServerlessJestPlugin {
+    function getWrapper(modName: string, modPath: string, handler: string): lw.Wrapped<any, any>;
+
+    const lambdaWrapper: typeof lw;
+}

types/serverless-jest-plugin/serverless-jest-plugin-tests.ts

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+import { lambdaWrapper, getWrapper } from 'serverless-jest-plugin';
+
+let lambda = lambdaWrapper.wrap({
+    region: 'eu-west-1',
+    lambdaFunction: 'myFunctionName',
+});
+
+lambda = getWrapper('foo', 'foo/bar.js', 'fooHandler');

types/serverless-jest-plugin/tsconfig.json

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

types/serverless-jest-plugin/tslint.json

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