Test migration to jest by hand

Apparently using regular expressions is way easier.

test/matchesWith/matchesWith.js

@@ -0,0 +1,8 @@
+const matchesWith = (obj, source, fn) =>
+Object.keys(source).every(
+key =>
+obj.hasOwnProperty(key) && fn
+? fn(obj[key], source[key], key, obj, source)
+: obj[key] == source[key]
+);
+module.exports = matchesWith;

test/matchesWith/matchesWith.test.js

@@ -0,0 +1,15 @@
+const expect = require('expect');
+const matchesWith = require('./matchesWith.js');
+
+
+  test('matchesWith is a Function', () => {
+  expect(matchesWith).toBeInstanceOf(Function);
+});
+  const isGreeting = val => /^h(?:i|ello)$/.test(val);
+  t.true(matchesWith(
+    { greeting: 'hello' },
+    { greeting: 'hi' },
+    (oV, sV) => isGreeting(oV) && isGreeting(sV)
+  ), 'Returns true for two objects with similar values, based on the provided function');
+  
+