p-fifo: initial definition (#39095)

types/p-fifo/index.d.ts

@@ -0,0 +1,14 @@
+// Type definitions for p-fifo 1.0
+// Project: https://github.com/alanshaw/p-fifo
+// Definitions by: Junxiao Shi <https://github.com/yoursunny>
+// Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
+// TypeScript Version: 2.1
+
+export = PFifo;
+
+declare class PFifo<T> {
+    constructor();
+    push(chunk: T): Promise<void>;
+    shift(): Promise<T>;
+    isEmpty(): boolean;
+}

types/p-fifo/p-fifo-tests.ts

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+import Fifo = require("p-fifo");
+
+const fifo = new Fifo<string>();
+
+(async () => {
+  // $ExpectType void
+  await fifo.push("a");
+
+  // $ExpectError
+  fifo.push(true);
+
+  // $ExpectType string
+  await fifo.shift();
+})();
+
+// $ExpectType boolean
+fifo.isEmpty();

types/p-fifo/tsconfig.json

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

types/p-fifo/tslint.json

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