(feat) created test for utilizing mongoose middleware

test/middleware_test.js

@@ -0,0 +1,28 @@
+const mongoose = require('mongoose');
+const assert = require('assert');
+const User = require('../src/users');
+const BlogPost = require('../src/blogPosts');
+
+describe('Middleware', (done) => {
+
+  let joe, blogPost;
+  beforeEach( (done) => {
+    joe = new User({ name: 'Joe' });
+    blogPost = new BlogPost({ title: 'JS is Great', content: 'Yep it really is!' });
+
+    joe.blogPosts.push(blogPost);
+
+    Promise.all([ joe.save(), blogPost.save()])
+      .then(() => done());
+    });
+
+  it('users clean up dangling blogposts on remove', (done) => {
+    joe.remove()
+      .then(() => BlogPost.count())
+      .then((count) => {
+        assert(count === 0);
+        done();
+      });
+  });
+
+});