it('should bind to the object', function() {
ko.defineComputedProperty(obj, 'fullName', function() {
return this.firstName + ' ' + this.lastName
})
obj.fullName.should.equal('Bob Doe')
})
it('should define a property with only a getter as the computed', function() {
ko.defineComputedProperty(obj, 'fullName', function() {
return this.firstName + ' ' + this.lastName
})
var propDescriptor = Object.getOwnPropertyDescriptor(obj, 'fullName')
propDescriptor.get.should.be.an.observable
should.not.exist(propDescriptor.set)
})
it('should define a property with both a get and set', function() {
var val = ko.observable('value')
ko.defineComputedProperty(obj, 'writable', {
write: x => val(x),
read: () => JSON.stringify(val())
})
var propDescriptor = Object.getOwnPropertyDescriptor(obj, 'writable')
propDescriptor.get.should.be.an.observable
propDescriptor.set.should.be.an.observable
obj.writable.should.equal('"value"')
obj.writable = 'newvalue'
obj.writable.should.equal('"newvalue"')
})