Merge pull request #25988 from mrmlnc/npm-run-parallel

[run-parallel] New typings for package

types/run-parallel/index.d.ts

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+// Type definitions for run-parallel 1.1
+// Project: https://github.com/feross/run-parallel
+// Definitions by: mrmlnc <https://github.com/mrmlnc>
+// Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
+// TypeScript Version: 2.1
+
+declare namespace RunParallel {
+    type TaskCallback<T> = (err: Error | null, results?: T) => void;
+    type Task<T> = (callback: TaskCallback<T>) => void;
+    type TaskObj<T> = Record<string, Task<T>>;
+
+    type Callback<T> = (err: Error, results: T) => void;
+}
+
+declare function RunParallel<T>(tasks: Array<RunParallel.Task<T>>): T[];
+declare function RunParallel<T>(tasks: Array<RunParallel.Task<T>>, callback: RunParallel.Callback<T[]>): void;
+
+declare function RunParallel<T>(tasks: RunParallel.TaskObj<T>): Record<string, T>;
+declare function RunParallel<T>(tasks: RunParallel.TaskObj<T>, callback: RunParallel.Callback<Record<string, T>>): void;
+
+export = RunParallel;

types/run-parallel/run-parallel-tests.ts

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+import rpl = require('run-parallel');
+
+const tasks: Array<rpl.Task<string>> = [
+    (callback) => () => callback(null, 'string'),
+    (callback) => () => callback(new Error('boom')),
+
+    // $ExpectError
+    (callback) => () => callback(null, 1)
+];
+
+const justTaskCallback: rpl.TaskCallback<string> = (err, result) => {
+    // $ExpectType Error | null
+    err;
+
+    // $ExpectType string | undefined
+    result;
+};
+
+justTaskCallback(null, 'string');
+justTaskCallback(new Error('boom'));
+// $ExpectError
+justTaskCallback(null, 1);
+
+rpl(tasks, (err, results) => {
+    // $ExpectType Error
+    err;
+
+    // $ExpectType string[]
+    results;
+});
+
+// $ExpectType string[]
+const results = rpl(tasks);
+
+const tasksObj: rpl.TaskObj<string> = {
+    one: (callback) => () => callback(null, 'string'),
+    two: (callback) => () => callback(new Error('boom')),
+
+    // $ExpectError
+    three: (callback) => () => callback(1)
+};
+
+rpl(tasksObj, (err, results) => {
+    // $ExpectType Error
+    err;
+
+    // $ExpectType Record<string, string>
+    results;
+});
+
+// $ExpectType Record<string, string>
+const resultsObj = rpl(tasksObj);

types/run-parallel/tsconfig.json

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

types/run-parallel/tslint.json

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+{ "extends": "dtslint/dt.json" }