mirror of https://github.com/restic/restic.git
131 lines
2.4 KiB
Go
131 lines
2.4 KiB
Go
package index
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import (
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"math/rand"
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"testing"
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"time"
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"github.com/restic/restic/internal/restic"
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rtest "github.com/restic/restic/internal/test"
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)
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func TestIndexMapBasic(t *testing.T) {
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t.Parallel()
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var (
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id restic.ID
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m indexMap
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r = rand.New(rand.NewSource(98765))
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)
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for i := 1; i <= 400; i++ {
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r.Read(id[:])
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rtest.Assert(t, m.get(id) == nil, "%v retrieved but not added", id)
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m.add(id, 0, 0, 0, 0)
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rtest.Assert(t, m.get(id) != nil, "%v added but not retrieved", id)
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rtest.Equals(t, uint(i), m.len())
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}
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}
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func TestIndexMapForeach(t *testing.T) {
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t.Parallel()
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const N = 10
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var m indexMap
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// Don't crash on empty map.
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m.foreach(func(*indexEntry) bool { return true })
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for i := 0; i < N; i++ {
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var id restic.ID
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id[0] = byte(i)
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m.add(id, i, uint32(i), uint32(i), uint32(i/2))
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}
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seen := make(map[int]struct{})
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m.foreach(func(e *indexEntry) bool {
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i := int(e.id[0])
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rtest.Assert(t, i < N, "unknown id %v in indexMap", e.id)
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rtest.Equals(t, i, e.packIndex)
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rtest.Equals(t, i, int(e.length))
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rtest.Equals(t, i, int(e.offset))
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rtest.Equals(t, i/2, int(e.uncompressedLength))
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seen[i] = struct{}{}
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return true
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})
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rtest.Equals(t, N, len(seen))
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ncalls := 0
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m.foreach(func(*indexEntry) bool {
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ncalls++
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return false
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})
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rtest.Equals(t, 1, ncalls)
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}
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func TestIndexMapForeachWithID(t *testing.T) {
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t.Parallel()
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const ndups = 3
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var (
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id restic.ID
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m indexMap
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r = rand.New(rand.NewSource(1234321))
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)
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r.Read(id[:])
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// No result (and no crash) for empty map.
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n := 0
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m.foreachWithID(id, func(*indexEntry) { n++ })
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rtest.Equals(t, 0, n)
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// Test insertion and retrieval of duplicates.
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for i := 0; i < ndups; i++ {
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m.add(id, i, 0, 0, 0)
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}
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for i := 0; i < 100; i++ {
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var otherid restic.ID
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r.Read(otherid[:])
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m.add(otherid, -1, 0, 0, 0)
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}
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n = 0
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var packs [ndups]bool
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m.foreachWithID(id, func(e *indexEntry) {
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packs[e.packIndex] = true
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n++
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})
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rtest.Equals(t, ndups, n)
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for i := range packs {
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rtest.Assert(t, packs[i], "duplicate from pack %d not retrieved", i)
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}
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}
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func BenchmarkIndexMapHash(b *testing.B) {
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var m indexMap
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m.add(restic.ID{}, 0, 0, 0, 0) // Trigger lazy initialization.
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ids := make([]restic.ID, 128) // 4 KiB.
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r := rand.New(rand.NewSource(time.Now().UnixNano()))
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for i := range ids {
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r.Read(ids[i][:])
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}
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b.ReportAllocs()
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b.SetBytes(int64(len(restic.ID{}) * len(ids)))
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b.ResetTimer()
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for i := 0; i < b.N; i++ {
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for _, id := range ids {
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m.hash(id)
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}
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}
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}
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