Test migration to jest by hand

Apparently using regular expressions is way easier.

test/isPromiseLike/isPromiseLike.js

@@ -0,0 +1,5 @@
+const isPromiseLike = obj =>
+obj !== null &&
+(typeof obj === 'object' || typeof obj === 'function') &&
+typeof obj.then === 'function';
+module.exports = isPromiseLike;

test/isPromiseLike/isPromiseLike.test.js

@@ -0,0 +1,16 @@
+const expect = require('expect');
+const isPromiseLike = require('./isPromiseLike.js');
+
+
+  test('isPromiseLike is a Function', () => {
+  expect(isPromiseLike).toBeInstanceOf(Function);
+});
+  t.equal(isPromiseLike({
+    then: function() {
+      return '';
+    }
+  }), true, 'Returns true for a promise-like object');
+  t.equal(isPromiseLike(null), false, 'Returns false for null');
+  t.equal(isPromiseLike({}), false, 'Returns false for an empty object');
+  
+