Add type definitions for promise-map-limit package (#25550)

* Add type definitions for map-promise-limit library

* map-promise-limit → promise-map-limit

A typo…sigh. The GitHub repository link to promise-map-limit was previously correct, however.

* Remove additional TSLint rule

Thanks @plantain-00!

.github/CODEOWNERS

@@ -3009,6 +3009,7 @@
 /types/proj4leaflet/                            @BendingBender
 /types/project-oxford/                          @scsouthw
 /types/promise-dag/                             @OSjoerdWie
+/types/promise-map-limit/                       @kohlmannj
 /types/promise-pg/                              @coldacid
 /types/promise-polyfill/                        @skysteve
 /types/promise-pool/                            @vilic

types/promise-map-limit/index.d.ts

@@ -0,0 +1,17 @@
+// Type definitions for promise-map-limit 1.0
+// Project: https://github.com/dbrockman/promise-map-limit
+// Definitions by: Joseph Kohlmann <https://github.com/kohlmannj>
+// Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
+// TypeScript Version: 2.8
+
+export = promiseMapLimit;
+
+declare function promiseMapLimit<T, R>(
+iterable: Iterable<T>,
+concurrency: number,
+iteratee: promiseMapLimit.IIteratee<T, R>
+): Promise<R[]>;
+
+declare namespace promiseMapLimit {
+    type IIteratee<T, R> = (value: T) => Promise<R> | R;
+}

types/promise-map-limit/promise-map-limit-tests.ts

@@ -0,0 +1,26 @@
+import mapPromiseLimit = require('promise-map-limit');
+
+const promisedStrings = mapPromiseLimit(['foo', 'bar'], 2, s => s);
+promisedStrings; // $ExpectType Promise<string[]>
+
+const promisedBooleans = mapPromiseLimit([true, false], 2, b => b);
+promisedBooleans; // $ExpectType Promise<boolean[]>
+
+const promiseOfPromisedNumbers = mapPromiseLimit(
+    [{ foo: 1 }, { foo: 2 }],
+    2,
+    value => Promise.resolve(value.foo),
+);
+promiseOfPromisedNumbers; // $ExpectType Promise<number[]>
+
+const promiseNumber = (value: Record<string, number>): Promise<number> =>
+    new Promise((resolve, reject) => { resolve(value.foo); });
+
+(async () => {
+    const asyncNumbers = await mapPromiseLimit(
+        [{ foo: 1 }, { foo: 2 }],
+        2,
+        async value => promiseNumber(value),
+    );
+    asyncNumbers; // $ExpectType number[]
+})();

types/promise-map-limit/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",
+        "promise-map-limit-tests.ts"
+    ]
+}

types/promise-map-limit/tslint.json

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