Unique GUID generation test is faulty

[gekkedev]

ez-guid/tests/guid.spec.ts

Line 73 in 2328825

expect(guids.indexOf(guids[0]) < 0).equal(false);

Essentially it just verifies the uniqueness of the first GUID. The others are not being cross-checked. Instead, it could .push() all GUIDs in a string array and check whether or not that array already .includes() the string.