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chore(tests): add strict monotonicity test case for uuid v7. (#154)

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* TestVersion7MonotonicityStrict

* reset timeNow and rand
This commit is contained in:
MikeWang 2024-01-16 23:12:18 +08:00 committed by GitHub
parent 016b199544
commit 16939dafc3
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1 changed files with 32 additions and 0 deletions
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32
uuid_test.go
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@ -896,3 +896,35 @@ func TestVersion7Monotonicity(t *testing.T) {
u1 = u2
}
}
type fakeRand struct{}
func (g fakeRand) Read(bs []byte) (int, error) {
for i, _ := range bs {
bs[i] = 0x88
}
return len(bs), nil
}
func TestVersion7MonotonicityStrict(t *testing.T) {
timeNow = func() time.Time {
return time.Date(2008, 8, 8, 8, 8, 8, 8, time.UTC)
}
defer func() {
timeNow = time.Now
}()
SetRand(fakeRand{})
defer SetRand(nil)
length := 100000 // > 3906
u1 := Must(NewV7()).String()
for i := 0; i < length; i++ {
u2 := Must(NewV7()).String()
if u2 <= u1 {
t.Errorf("monotonicity failed at #%d: %s(next) < %s(before)", i, u2, u1)
break
}
u1 = u2
}
}