43 lines
855 B
Go
43 lines
855 B
Go
package id
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import (
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"testing"
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"github.com/stretchr/testify/require"
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mid "go.unistack.org/micro/v3/util/id"
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)
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func TestHasNoCollisions(t *testing.T) {
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tries := 100_000
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used := make(map[string]bool, tries)
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for i := 0; i < tries; i++ {
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id := mid.Must()
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require.False(t, used[id], "shouldn't return colliding IDs")
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used[id] = true
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}
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}
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func TestFlatDistribution(t *testing.T) {
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tries := 100_000
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alphabet := "abcdefghij"
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size := 10
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chars := make(map[rune]int)
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for i := 0; i < tries; i++ {
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id := mid.Must(mid.Alphabet(alphabet), mid.Size(size))
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for _, r := range id {
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chars[r]++
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}
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}
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for _, count := range chars {
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require.InEpsilon(t, size*tries/len(alphabet), count, .01, "should have flat distribution")
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}
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}
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// Benchmark id generator
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func BenchmarkNanoid(b *testing.B) {
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for n := 0; n < b.N; n++ {
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_, _ = mid.New()
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}
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}
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