how to inject mock testing hapi with Server.inject

Question

I want to test hapi routes with lab, I am using mysql database.

The problem using Server.inject to test the route is that i can't mock the database because I am not calling the file that contains the handler function, so how do I inject mock database in handler?

What is the specific problem you are having? `inject` should work. `inject` should be identical to a real request from a coding standpoint. — arb, Aug 17 '14 at 19:53
did you get anywhere with this? looking to use hapijs for an API and will want to mock db calls for tests. — Adamski, Sep 27 '14 at 10:58
@Adamski see [my answer](http://stackoverflow.com/a/28820753/2372767) below. — SlightlyCuban, Mar 03 '15 at 14:49

score 5 · Accepted Answer · answered Mar 02 '15 at 22:35

You should be able to use something like sinon to mock anything you require. For example, let's say you have a dbHandler.js somewhere:

var db = require('db');

module.exports.handleOne = function(request, reply) {
    reply(db.findOne());
}

And then in your server.js:

var Hapi = require('hapi'),
    dbHandler = require('dbHandler')

var server = new Hapi.Server(); server.connection({ port: 3000 });

server.route({
    method: 'GET',
    path: '/',
    handler: dbHandler.handleOne
});

You can still mock out that call, because all calls to require are cached. So, in your test.js:

var sinon = require('sinon'),
    server = require('server'),
    db = require('db');

sinon.stub(db, 'findOne').returns({ one: 'fakeOne' });
// now the real findOne won't be called until you call db.findOne.restore()
server.inject({ url: '/' }, function (res) {
    expect(res.one).to.equal('fakeOne');
});

@MananVaghasiya see http://nodejs.org/api/globals.html#globals_require_cache . Once resolved, `require` will cache the object, and subsequent calls to `require` for a module will return the cached instance of said module. — SlightlyCuban, Mar 03 '15 at 14:48

how to inject mock testing hapi with Server.inject

1 Answers1