Is there a jasmine matcher to compare objects on subsets of their properties

Jasmine 2.0

expect(result).toEqual(jasmine.objectContaining(example))

Since this fix: https://github.com/pivotal/jasmine/commit/47884032ad255e8e15144dcd3545c3267795dee0 it even works on nested objects, you just need to wrap each object you want to match partially in jasmine.objectContaining()

Simple example:

it('can match nested partial objects', function ()
{
    var joc = jasmine.objectContaining;
    expect({ 
        a: {x: 1, y: 2}, 
        b: 'hi' 
    }).toEqual(joc({
        a: joc({ x: 1})
    }));
});

I've had the same problem. I just tried this code, it works for me :

expect(Object.keys(myObject)).toContain('myKey');

I don't think it is that common and I don't think you can find one. Just write one:

beforeEach(function () {
    this.addMatchers({
        toInclude: function (expected) {
            var failed;

            for (var i in expected) {
                if (expected.hasOwnProperty(i) && !this.actual.hasOwnProperty(i)) {
                    failed = [i, expected[i]];
                    break;
                }
            }

            if (undefined !== failed) {
                this.message = function() {
                    return 'Failed asserting that array includes element "'
                        + failed[0] + ' => ' + failed[1] + '"';
                };
                return false;
            }

            return true;
        }
    });
});