mixed.js

it('should update a board on PUT', (done) => {
			
	dao.addBoard({
		ID: '1111',
		Name: 'test board',
		Adult: false,
		BoardMasters: null,
		Tags: [],
		IC: null
	}).then((data) => {
		const formData = {
			Name: 'test board edited!',
			Adult: false,
			BoardMasters: null,
			Tags: [],
			IC: null
		};

		const req = http.request({
			host: 'localhost',
			port: '8080',
			path: '/api/board/1111',
			method: 'PUT',
			headers: {
				'Content-type': 'application/json'
			}
		});
		req.write(`${JSON.stringify(formData)}\n`);
		req.end();

		req.on('response', (response) => {
			assert.equal(200, response.statusCode, 'Status code should be 200 OK');
			done();
		});
	}).catch((err) => {
		assert.fail("no error", "error", "Error occurred: " + err);
		done();
	})
	
});

try this to see if the catch fires correctly?

it('should update a board on PUT', (done) => {

    dao.addBoard({
        ID: '1111',
        Name: 'test board',
        Adult: false,
        BoardMasters: null,
        Tags: [],
        IC: null
    }).then((data) => {
        const formData = {
            Name: 'test board edited!',
            Adult: false,
            BoardMasters: null,
            Tags: [],
            IC: null
        };

        const req = http.request({
            host: 'localhost',
            port: '8080',
            path: '/api/board/1111',
            method: 'PUT',
            headers: {
                'Content-type': 'application/json'
            }
        });
        req.write(`${JSON.stringify(formData)}\n`);
        req.end();

        req.on('response', (response) => {
            assert.equal(200, response.statusCode, 'Status code should be 200 OK');
            done();
        });
    }, (err) => {
        assert.fail("no error", "error", "Error occurred: " + err);
        done();
    })

});