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() + ']';
}

Thanks for the idea! Shouldn't the space in notText be on the other side to separate the actual value and not do double the space in front of the following text at the line 9? i fixed it im my fork and added toBeInstanceOf to check other than primitive types.

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')