Test migration to jest by hand

Apparently using regular expressions is way easier.

test/pipeAsyncFunctions/pipeAsyncFunctions.js

@@ -0,0 +1,2 @@
+const pipeAsyncFunctions = (...fns) => arg => fns.reduce((p, f) => p.then(f), Promise.resolve(arg));
+module.exports = pipeAsyncFunctions;

test/pipeAsyncFunctions/pipeAsyncFunctions.test.js

@@ -0,0 +1,19 @@
+const expect = require('expect');
+const pipeAsyncFunctions = require('./pipeAsyncFunctions.js');
+
+
+  test('pipeAsyncFunctions is a Function', () => {
+  expect(pipeAsyncFunctions).toBeInstanceOf(Function);
+});
+  t.equal(
+    await pipeAsyncFunctions(
+      (x) => x + 1,
+      (x) => new Promise((resolve) => setTimeout(() => resolve(x + 2), 0)),
+      (x) => x + 3,
+      async (x) => await x + 4,
+    )
+    (5),
+    15,
+    'pipeAsyncFunctions result should be 15'
+  );
+