Mocha test failing when sending invalid data to the server

Question

I'm working on a small todos app with nodejs and mongodb.

I have the model definition here:

const Todo = new Schema({
    text: {
        type: String,
        require: true,
        minlength: 5,
        trim: true
    },
    completed: {
        type: Boolean
    },
    createdAt: {
        type: {type: Date, default: Date.now}
    }
});

As you can see, the text property is required and it should throw an error if it's missing when it reads the request.

Over here, I'm send the data to my endpoint:

app.post('/todos', (req, res) => {
    let todo = new Todo({
        text: req.body.text,
        completed: req.body.completed
    });

    todo.save()
        .then((document) => {
            res.send(document);
        }, (error) => {
            res.status(400).send(error);
        })
});

And finally, this is my test for the specific scenario where the user sends a empty set of data to the server:

it('Should not create todo document with invalid body data', (done) => {
        request(app)
            .post('/todos')
            .send({})
            .expect(400)
            .end((error, res) => {
                if(error){
                    return done(error);
                }
                Todo.find()
                    .then((todos) => {
                        expect(todos.length).toBe(0);
                        done();
                    }).catch((error) => done(error));
            });
    });

After running the test, for some reason it throws the following:

1) POST /todos
     Should not create todo document with invalid body data:
     Error: expected 400 "Bad Request", got 200 "OK"
      at Test._assertStatus (node_modules\supertest\lib\test.js:266:12)
      at Test._assertFunction (node_modules\supertest\lib\test.js:281:11)
      at Test.assert (node_modules\supertest\lib\test.js:171:18)
      at Server.assert (node_modules\supertest\lib\test.js:131:12)
      at emitCloseNT (net.js:1689:8)
      at process._tickCallback (internal/process/next_tick.js:152:19)

I've been trying to debug this for the past hour and I can't find what's wrong with it. Can anyone give me a hand?

UPDATE

Other test:

it('Should create a new todo', (done) => {
        let text = 'This is a string';

        request(app)
            .post('/todos')
            .send({text})
            .expect(200)
            .expect((res) => {
                let testString = res.body.text;
                expect(testString).toBe(text);
                expect(typeof testString).toBe('string');
                expect(testString.length).not.toBe(0);
            })
            .end((error, res) => {
                if(error) {
                    return done(error);
                }
                Todo.find()
                    .then((todos) => {
                        expect(todos.length).toBe(1);
                        expect(todos[0].text).toBe(text);
                        done();
                    }).catch((error) => done(error));
            });
    });

Answer 1

You should check if text and completed exist before using them:

app.post('/todos', (req, res) => {
    let text = req.body.text;
    let completed = req.body.completed;
    if(!completed) { completed = false; }
    if(!text) {
        res.status(400).send("Request parameters missing");
    } else {
        let todo = new Todo({
            text: req.body.text,
            completed: req.body.completed
        });

        todo.save()
            .then((document) => {
                res.send(document);
            }, (error) => {
                res.status(400).send(error);
            })
    }
});

Also in your Schema it should be "required" instead of "require"