75 lines
1.8 KiB
V
75 lines
1.8 KiB
V
import time
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import rand
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// uuid_v4:
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fn test_rand_uuid_v4() {
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uuid1 := rand.uuid_v4()
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uuid2 := rand.uuid_v4()
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uuid3 := rand.uuid_v4()
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assert uuid1 != uuid2
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assert uuid1 != uuid3
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assert uuid2 != uuid3
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assert uuid1.len == 36
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assert uuid2.len == 36
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assert uuid3.len == 36
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for i in 0 .. 1000 {
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x := rand.uuid_v4()
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// check the version field is always 4:
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assert x[14] == `4`
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// and the clock_seq_hi_and_reserved field is valid too:
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assert x[19] in [`8`, `9`, `a`, `b`]
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}
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}
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// ulids:
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fn test_ulids_are_unique() {
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ulid1 := rand.ulid()
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ulid2 := rand.ulid()
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ulid3 := rand.ulid()
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assert ulid1.len == 26
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assert ulid2.len == 26
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assert ulid3.len == 26
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assert ulid1 != ulid2
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assert ulid1 != ulid3
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assert ulid2 != ulid3
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}
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fn test_ulids_max_start_character_is_ok() {
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ulid1 := rand.ulid()
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// the largest valid ULID encoded in Base32 is 7ZZZZZZZZZZZZZZZZZZZZZZZZZ
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assert (int(ulid1[0]) - 48) <= 7
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}
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fn test_ulids_generated_in_the_same_millisecond_have_the_same_prefix() {
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t := u64(time.utc().unix_time_milli())
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mut ulid1 := ''
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mut ulid2 := ''
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mut ulid3 := ''
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ulid1 = rand.ulid_at_millisecond(t)
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ulid2 = rand.ulid_at_millisecond(t)
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ulid3 = rand.ulid_at_millisecond(t)
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ulid1_prefix := ulid1[0..10]
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ulid2_prefix := ulid2[0..10]
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ulid3_prefix := ulid3[0..10]
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assert ulid1_prefix == ulid2_prefix
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assert ulid1_prefix == ulid3_prefix
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}
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fn test_ulids_should_be_lexicographically_ordered_when_not_in_same_millisecond() {
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ulid1 := rand.ulid()
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time.sleep(1 * time.millisecond)
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ulid2 := rand.ulid()
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time.sleep(1 * time.millisecond)
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ulid3 := rand.ulid()
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mut all := [ulid3, ulid2, ulid1]
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// eprintln('all before: $all')
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all.sort()
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// eprintln('all after: $all')
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s1 := all[0]
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s2 := all[1]
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s3 := all[2]
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assert s1 == ulid1
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assert s2 == ulid2
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assert s3 == ulid3
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}
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