Test migration to jest by hand

Apparently using regular expressions is way easier.

test/pipeFunctions/pipeFunctions.test.js

@@ -0,0 +1,13 @@
+const expect = require('expect');
+const pipeFunctions = require('./pipeFunctions.js');
+
+
+  test('pipeFunctions is a Function', () => {
+  expect(pipeFunctions).toBeInstanceOf(Function);
+});
+  const add5 = x => x + 5;
+  const multiply = (x, y) => x * y;
+  const multiplyAndAdd5 = pipeFunctions(multiply, add5);
+  t.equal(multiplyAndAdd5(5, 2), 15, 'Performs left-to-right function composition');
+  
+