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TestBasicRandomness

go.temporal.io/server/common/fastrand/TestBasicRandomness

Package
go.temporal.io/server/common/fastrand
Suite / test hierarchy
TestBasicRandomness
Test
TestBasicRandomness
Introduced at
fastrand.go ×4 Joint frontier
Covered ranges
4
Covered lines
13
Covered files
1

Covered source

Expand a file to inspect source; the > gutter marks covered lines.

go.temporal.io/server/common/fastrand/fastrand.go 13 covered LOC · 4 ranges

Open complete file

16 // the code.
17 var globalRngPool = sync.Pool{
18 > New: func() any { fastrand.go
19 > return rand.New(rand.NewSource(rand.Int63()))
20 > },
21 }
22
24 // for globalRngPool.Get(), with a typecast and assertion that everything is
25 // as expected.
26 > func getRng() *rand.Rand { fastrand.go
27 > rng, ok := globalRngPool.Get().(*rand.Rand)
28 > if !ok {
29 // nolint:forbidigo
30 panic("Failed to access valid object from globalRngPool") // This should never happen, since it would mean someone put an invalid object into the pool.
31 }
32
33 > return rng fastrand.go
34 }
35
108
109 // Intn implements [math/rand.Rand.Intn].
110 > func (r Rand) Intn(n int) int { fastrand.go
111 > rng := getRng()
112 > res := rng.Intn(n)
113 > globalRngPool.Put(rng)
114 > return res
115 > }
116
117 // NormFloat64 implements [math/rand.Rand.NormFloat64].