jasmine.js matcher to test type of object

jasmine.toBeTypeOf.js

jasmine.Matchers.prototype.toBeTypeOf = function(expected) {
	var actual, notText, objType;

	actual = this.actual;
	notText = this.isNot ? 'not ' : '';
	objType = actual ? Object.prototype.toString.call(actual) : '';

	this.message = function() {
		return 'Expected ' + actual + notText + ' to be an array';
	}

	return objType.toLowerCase() === '[object ' + expected.toLowerCase() + ']';
}

Worth noting, that in Jasmine 2.0 you can use jasmine.any() matcher:

expect(12).toEqual(jasmine.any(Number))

as mentioned here

+1 for @FilipZawada's suggestion of jasmine#any

I like the idea.

Saves you the trouble of writing e.g. expect(typeof(var)).toEqual('number')