toBeEmpty() matcher inconsistent behavior

[aletheia]

toBeEmpty fails when checked object is not defined, but matcher when used in with .not does not fail if checked node is undefined.

  describe("toBeEmpty() bug with undefined", function() {
    it("works correctly when requiring being empty", function() {
    expect(undefined).toBeEmpty() // this fails with message "undefined is not empty"
  })

  it("behaves unexpectedly when using .not", function() {
    expect(undefined).not.toBeEmpty() // this does not fail
  })
})