Jasmine .not is not working?

[wakandan]

In one of my test I was trying to test if a string is NOT empty, so I do
expect(myString).not.toBe('')
and it doesn't work because not is not defined. Is it supposed to be the way it works or I'm missing something here? Another way I tried was
expect(myString).toBeTruthy()
but the log message doesn't seems like toBeTruthy() was something valid either...

[Douwe92]

expect(myString)toEqual('').toBe(false) ?

[juliemr]

Correct, it's not working. Duplicate of #139.