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Diffstat (limited to 'spec/frontend/diffs/utils/uuids_spec.js')
-rw-r--r-- | spec/frontend/diffs/utils/uuids_spec.js | 92 |
1 files changed, 92 insertions, 0 deletions
diff --git a/spec/frontend/diffs/utils/uuids_spec.js b/spec/frontend/diffs/utils/uuids_spec.js new file mode 100644 index 00000000000..79d3ebadd4f --- /dev/null +++ b/spec/frontend/diffs/utils/uuids_spec.js @@ -0,0 +1,92 @@ +import { uuids } from '~/diffs/utils/uuids'; + +const HEX = /[a-f0-9]/i; +const HEX_RE = HEX.source; +const UUIDV4 = new RegExp( + `${HEX_RE}{8}-${HEX_RE}{4}-4${HEX_RE}{3}-[89ab]${HEX_RE}{3}-${HEX_RE}{12}`, + 'i', +); + +describe('UUIDs Util', () => { + describe('uuids', () => { + const SEQUENCE_FOR_GITLAB_SEED = [ + 'a1826a44-316c-480e-a93d-8cdfeb36617c', + 'e049db1f-a4cf-4cba-aa60-6d95e3b547dc', + '6e3c737c-13a7-4380-b17d-601f187d7e69', + 'bee5cc7f-c486-45c0-8ad3-d1ac5402632d', + 'af248c9f-a3a6-4d4f-a311-fe151ffab25a', + ]; + const SEQUENCE_FOR_12345_SEED = [ + 'edfb51e2-e3e1-4de5-90fd-fd1d21760881', + '2f154da4-0a2d-4da9-b45e-0ffed391517e', + '91566d65-8836-4222-9875-9e1df4d0bb01', + 'f6ea6c76-7640-4d71-a736-9d3bec7a1a8e', + 'bfb85869-5fb9-4c5b-a750-5af727ac5576', + ]; + + it('returns version 4 UUIDs', () => { + expect(uuids()[0]).toMatch(UUIDV4); + }); + + it('outputs an array of UUIDs', () => { + const ids = uuids({ count: 11 }); + + expect(ids.length).toEqual(11); + expect(ids.every(id => UUIDV4.test(id))).toEqual(true); + }); + + it.each` + seeds | uuid + ${['some', 'special', 'seed']} | ${'6fa53e51-0f70-4072-9c84-1c1eee1b9934'} + ${['magic']} | ${'fafae8cd-7083-44f3-b82d-43b30bd27486'} + ${['seeded']} | ${'e06ed291-46c5-4e42-836b-e7c772d48b49'} + ${['GitLab']} | ${'a1826a44-316c-480e-a93d-8cdfeb36617c'} + ${['JavaScript']} | ${'12dfb297-1560-4c38-9775-7178ef8472fb'} + ${[99, 169834, 2619]} | ${'3ecc8ad6-5b7c-4c9b-94a8-c7271c2fa083'} + ${[12]} | ${'2777374b-723b-469b-bd73-e586df964cfd'} + ${[9876, 'mixed!', 7654]} | ${'865212e0-4a16-4934-96f9-103cf36a6931'} + ${[123, 1234, 12345, 6]} | ${'40aa2ee6-0a11-4e67-8f09-72f5eba04244'} + ${[0]} | ${'8c7f0aac-97c4-4a2f-b716-a675d821ccc0'} + `( + 'should always output the UUID $uuid when the options.seeds argument is $seeds', + ({ uuid, seeds }) => { + expect(uuids({ seeds })[0]).toEqual(uuid); + }, + ); + + describe('unseeded UUID randomness', () => { + const nonRandom = Array(6) + .fill(0) + .map((_, i) => uuids({ seeds: [i] })[0]); + const random = uuids({ count: 6 }); + const moreRandom = uuids({ count: 6 }); + + it('is different from a seeded result', () => { + random.forEach((id, i) => { + expect(id).not.toEqual(nonRandom[i]); + }); + }); + + it('is different from other random results', () => { + random.forEach((id, i) => { + expect(id).not.toEqual(moreRandom[i]); + }); + }); + + it('never produces any duplicates', () => { + expect(new Set(random).size).toEqual(random.length); + }); + }); + + it.each` + seed | sequence + ${'GitLab'} | ${SEQUENCE_FOR_GITLAB_SEED} + ${12345} | ${SEQUENCE_FOR_12345_SEED} + `( + 'should output the same sequence of UUIDs for the given seed "$seed"', + ({ seed, sequence }) => { + expect(uuids({ seeds: [seed], count: 5 })).toEqual(sequence); + }, + ); + }); +}); |