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Diffstat (limited to 'pkg/segment/test/segment_test.go')
-rw-r--r--pkg/segment/test/segment_test.go397
1 files changed, 349 insertions, 48 deletions
diff --git a/pkg/segment/test/segment_test.go b/pkg/segment/test/segment_test.go
index f19a005f3..85fa19096 100644
--- a/pkg/segment/test/segment_test.go
+++ b/pkg/segment/test/segment_test.go
@@ -17,6 +17,7 @@ package segment
import (
"fmt"
"math/rand"
+ "reflect"
"testing"
)
@@ -32,61 +33,65 @@ const (
// valueOffset is the difference between the value and start of test
// segments.
valueOffset = 100000
+
+ // intervalLength is the interval used by random gap tests.
+ intervalLength = 10
)
func shuffle(xs []int) {
- for i := range xs {
- j := rand.Intn(i + 1)
- xs[i], xs[j] = xs[j], xs[i]
- }
+ rand.Shuffle(len(xs), func(i, j int) { xs[i], xs[j] = xs[j], xs[i] })
}
-func randPermutation(size int) []int {
+func randIntervalPermutation(size int) []int {
p := make([]int, size)
for i := range p {
- p[i] = i
+ p[i] = intervalLength * i
}
shuffle(p)
return p
}
-// checkSet returns an error if s is incorrectly sorted, does not contain
-// exactly expectedSegments segments, or contains a segment for which val !=
-// key + valueOffset.
-func checkSet(s *Set, expectedSegments int) error {
- havePrev := false
- prev := 0
- nrSegments := 0
- for seg := s.FirstSegment(); seg.Ok(); seg = seg.NextSegment() {
- next := seg.Start()
- if havePrev && prev >= next {
- return fmt.Errorf("incorrect order: key %d (segment %d) >= key %d (segment %d)", prev, nrSegments-1, next, nrSegments)
- }
- if got, want := seg.Value(), seg.Start()+valueOffset; got != want {
- return fmt.Errorf("segment %d has key %d, value %d (expected %d)", nrSegments, seg.Start, got, want)
- }
- prev = next
- havePrev = true
- nrSegments++
- }
- if nrSegments != expectedSegments {
- return fmt.Errorf("incorrect number of segments: got %d, wanted %d", nrSegments, expectedSegments)
+// validate can be passed to Check.
+func validate(nr int, r Range, v int) error {
+ if got, want := v, r.Start+valueOffset; got != want {
+ return fmt.Errorf("segment %d has key %d, value %d (expected %d)", nr, r.Start, got, want)
}
return nil
}
-// countSegmentsIn returns the number of segments in s.
-func countSegmentsIn(s *Set) int {
- var count int
- for seg := s.FirstSegment(); seg.Ok(); seg = seg.NextSegment() {
- count++
+// checkSetMaxGap returns an error if maxGap inside all nodes of s is not well
+// maintained.
+func checkSetMaxGap(s *gapSet) error {
+ n := s.root
+ return checkNodeMaxGap(&n)
+}
+
+// checkNodeMaxGap returns an error if maxGap inside the subtree rooted by n is
+// not well maintained.
+func checkNodeMaxGap(n *gapnode) error {
+ var max int
+ if !n.hasChildren {
+ max = n.calculateMaxGapLeaf()
+ } else {
+ for i := 0; i <= n.nrSegments; i++ {
+ child := n.children[i]
+ if err := checkNodeMaxGap(child); err != nil {
+ return err
+ }
+ if temp := child.maxGap.Get(); i == 0 || temp > max {
+ max = temp
+ }
+ }
+ }
+ if max != n.maxGap.Get() {
+ return fmt.Errorf("maxGap wrong in node\n%vexpected: %d got: %d", n, max, n.maxGap)
}
- return count
+ return nil
}
func TestAddRandom(t *testing.T) {
var s Set
- order := randPermutation(testSize)
+ order := rand.Perm(testSize)
var nrInsertions int
for i, j := range order {
if !s.AddWithoutMerging(Range{j, j + 1}, j+valueOffset) {
@@ -94,12 +99,12 @@ func TestAddRandom(t *testing.T) {
break
}
nrInsertions++
- if err := checkSet(&s, nrInsertions); err != nil {
+ if err := s.segmentTestCheck(nrInsertions, validate); err != nil {
t.Errorf("Iteration %d: %v", i, err)
break
}
}
- if got, want := countSegmentsIn(&s), nrInsertions; got != want {
+ if got, want := s.countSegments(), nrInsertions; got != want {
t.Errorf("Wrong final number of segments: got %d, wanted %d", got, want)
}
if t.Failed() {
@@ -115,7 +120,156 @@ func TestRemoveRandom(t *testing.T) {
t.Fatalf("Failed to insert segment %d", i)
}
}
- order := randPermutation(testSize)
+ order := rand.Perm(testSize)
+ var nrRemovals int
+ for i, j := range order {
+ seg := s.FindSegment(j)
+ if !seg.Ok() {
+ t.Errorf("Iteration %d: failed to find segment with key %d", i, j)
+ break
+ }
+ s.Remove(seg)
+ nrRemovals++
+ if err := s.segmentTestCheck(testSize-nrRemovals, validate); err != nil {
+ t.Errorf("Iteration %d: %v", i, err)
+ break
+ }
+ }
+ if got, want := s.countSegments(), testSize-nrRemovals; got != want {
+ t.Errorf("Wrong final number of segments: got %d, wanted %d", got, want)
+ }
+ if t.Failed() {
+ t.Logf("Removal order: %v", order[:nrRemovals])
+ t.Logf("Set contents:\n%v", &s)
+ t.FailNow()
+ }
+}
+
+func TestMaxGapAddRandom(t *testing.T) {
+ var s gapSet
+ order := rand.Perm(testSize)
+ var nrInsertions int
+ for i, j := range order {
+ if !s.AddWithoutMerging(Range{j, j + 1}, j+valueOffset) {
+ t.Errorf("Iteration %d: failed to insert segment with key %d", i, j)
+ break
+ }
+ nrInsertions++
+ if err := s.segmentTestCheck(nrInsertions, validate); err != nil {
+ t.Errorf("Iteration %d: %v", i, err)
+ break
+ }
+ if err := checkSetMaxGap(&s); err != nil {
+ t.Errorf("When inserting %d: %v", j, err)
+ break
+ }
+ }
+ if got, want := s.countSegments(), nrInsertions; got != want {
+ t.Errorf("Wrong final number of segments: got %d, wanted %d", got, want)
+ }
+ if t.Failed() {
+ t.Logf("Insertion order: %v", order[:nrInsertions])
+ t.Logf("Set contents:\n%v", &s)
+ }
+}
+
+func TestMaxGapAddRandomWithRandomInterval(t *testing.T) {
+ var s gapSet
+ order := randIntervalPermutation(testSize)
+ var nrInsertions int
+ for i, j := range order {
+ if !s.AddWithoutMerging(Range{j, j + rand.Intn(intervalLength-1) + 1}, j+valueOffset) {
+ t.Errorf("Iteration %d: failed to insert segment with key %d", i, j)
+ break
+ }
+ nrInsertions++
+ if err := s.segmentTestCheck(nrInsertions, validate); err != nil {
+ t.Errorf("Iteration %d: %v", i, err)
+ break
+ }
+ if err := checkSetMaxGap(&s); err != nil {
+ t.Errorf("When inserting %d: %v", j, err)
+ break
+ }
+ }
+ if got, want := s.countSegments(), nrInsertions; got != want {
+ t.Errorf("Wrong final number of segments: got %d, wanted %d", got, want)
+ }
+ if t.Failed() {
+ t.Logf("Insertion order: %v", order[:nrInsertions])
+ t.Logf("Set contents:\n%v", &s)
+ }
+}
+
+func TestMaxGapAddRandomWithMerge(t *testing.T) {
+ var s gapSet
+ order := randIntervalPermutation(testSize)
+ nrInsertions := 1
+ for i, j := range order {
+ if !s.Add(Range{j, j + intervalLength}, j+valueOffset) {
+ t.Errorf("Iteration %d: failed to insert segment with key %d", i, j)
+ break
+ }
+ if err := checkSetMaxGap(&s); err != nil {
+ t.Errorf("When inserting %d: %v", j, err)
+ break
+ }
+ }
+ if got, want := s.countSegments(), nrInsertions; got != want {
+ t.Errorf("Wrong final number of segments: got %d, wanted %d", got, want)
+ }
+ if t.Failed() {
+ t.Logf("Insertion order: %v", order)
+ t.Logf("Set contents:\n%v", &s)
+ }
+}
+
+func TestMaxGapRemoveRandom(t *testing.T) {
+ var s gapSet
+ for i := 0; i < testSize; i++ {
+ if !s.AddWithoutMerging(Range{i, i + 1}, i+valueOffset) {
+ t.Fatalf("Failed to insert segment %d", i)
+ }
+ }
+ order := rand.Perm(testSize)
+ var nrRemovals int
+ for i, j := range order {
+ seg := s.FindSegment(j)
+ if !seg.Ok() {
+ t.Errorf("Iteration %d: failed to find segment with key %d", i, j)
+ break
+ }
+ temprange := seg.Range()
+ s.Remove(seg)
+ nrRemovals++
+ if err := s.segmentTestCheck(testSize-nrRemovals, validate); err != nil {
+ t.Errorf("Iteration %d: %v", i, err)
+ break
+ }
+ if err := checkSetMaxGap(&s); err != nil {
+ t.Errorf("When removing %v: %v", temprange, err)
+ break
+ }
+ }
+ if got, want := s.countSegments(), testSize-nrRemovals; got != want {
+ t.Errorf("Wrong final number of segments: got %d, wanted %d", got, want)
+ }
+ if t.Failed() {
+ t.Logf("Removal order: %v", order[:nrRemovals])
+ t.Logf("Set contents:\n%v", &s)
+ t.FailNow()
+ }
+}
+
+func TestMaxGapRemoveHalfRandom(t *testing.T) {
+ var s gapSet
+ for i := 0; i < testSize; i++ {
+ if !s.AddWithoutMerging(Range{intervalLength * i, intervalLength*i + rand.Intn(intervalLength-1) + 1}, intervalLength*i+valueOffset) {
+ t.Fatalf("Failed to insert segment %d", i)
+ }
+ }
+ order := randIntervalPermutation(testSize)
+ order = order[:testSize/2]
var nrRemovals int
for i, j := range order {
seg := s.FindSegment(j)
@@ -123,14 +277,19 @@ func TestRemoveRandom(t *testing.T) {
t.Errorf("Iteration %d: failed to find segment with key %d", i, j)
break
}
+ temprange := seg.Range()
s.Remove(seg)
nrRemovals++
- if err := checkSet(&s, testSize-nrRemovals); err != nil {
+ if err := s.segmentTestCheck(testSize-nrRemovals, validate); err != nil {
t.Errorf("Iteration %d: %v", i, err)
break
}
+ if err := checkSetMaxGap(&s); err != nil {
+ t.Errorf("When removing %v: %v", temprange, err)
+ break
+ }
}
- if got, want := countSegmentsIn(&s), testSize-nrRemovals; got != want {
+ if got, want := s.countSegments(), testSize-nrRemovals; got != want {
t.Errorf("Wrong final number of segments: got %d, wanted %d", got, want)
}
if t.Failed() {
@@ -140,6 +299,148 @@ func TestRemoveRandom(t *testing.T) {
}
}
+func TestMaxGapAddRandomRemoveRandomHalfWithMerge(t *testing.T) {
+ var s gapSet
+ order := randIntervalPermutation(testSize * 2)
+ order = order[:testSize]
+ for i, j := range order {
+ if !s.Add(Range{j, j + intervalLength}, j+valueOffset) {
+ t.Errorf("Iteration %d: failed to insert segment with key %d", i, j)
+ break
+ }
+ if err := checkSetMaxGap(&s); err != nil {
+ t.Errorf("When inserting %d: %v", j, err)
+ break
+ }
+ }
+ shuffle(order)
+ var nrRemovals int
+ for _, j := range order {
+ seg := s.FindSegment(j)
+ if !seg.Ok() {
+ continue
+ }
+ temprange := seg.Range()
+ s.Remove(seg)
+ nrRemovals++
+ if err := checkSetMaxGap(&s); err != nil {
+ t.Errorf("When removing %v: %v", temprange, err)
+ break
+ }
+ }
+ if t.Failed() {
+ t.Logf("Removal order: %v", order[:nrRemovals])
+ t.Logf("Set contents:\n%v", &s)
+ t.FailNow()
+ }
+}
+
+func TestNextLargeEnoughGap(t *testing.T) {
+ var s gapSet
+ order := randIntervalPermutation(testSize * 2)
+ order = order[:testSize]
+ for i, j := range order {
+ if !s.Add(Range{j, j + rand.Intn(intervalLength-1) + 1}, j+valueOffset) {
+ t.Errorf("Iteration %d: failed to insert segment with key %d", i, j)
+ break
+ }
+ if err := checkSetMaxGap(&s); err != nil {
+ t.Errorf("When inserting %d: %v", j, err)
+ break
+ }
+ }
+ shuffle(order)
+ order = order[:testSize/2]
+ for _, j := range order {
+ seg := s.FindSegment(j)
+ if !seg.Ok() {
+ continue
+ }
+ temprange := seg.Range()
+ s.Remove(seg)
+ if err := checkSetMaxGap(&s); err != nil {
+ t.Errorf("When removing %v: %v", temprange, err)
+ break
+ }
+ }
+ minSize := 7
+ var gapArr1 []int
+ for gap := s.LowerBoundGap(0).NextLargeEnoughGap(minSize); gap.Ok(); gap = gap.NextLargeEnoughGap(minSize) {
+ if gap.Range().Length() < minSize {
+ t.Errorf("NextLargeEnoughGap wrong, gap %v has length %d, wanted %d", gap.Range(), gap.Range().Length(), minSize)
+ } else {
+ gapArr1 = append(gapArr1, gap.Range().Start)
+ }
+ }
+ var gapArr2 []int
+ for gap := s.LowerBoundGap(0).NextGap(); gap.Ok(); gap = gap.NextGap() {
+ if gap.Range().Length() >= minSize {
+ gapArr2 = append(gapArr2, gap.Range().Start)
+ }
+ }
+
+ if !reflect.DeepEqual(gapArr2, gapArr1) {
+ t.Errorf("Search result not correct, got: %v, wanted: %v", gapArr1, gapArr2)
+ }
+ if t.Failed() {
+ t.Logf("Set contents:\n%v", &s)
+ t.FailNow()
+ }
+}
+
+func TestPrevLargeEnoughGap(t *testing.T) {
+ var s gapSet
+ order := randIntervalPermutation(testSize * 2)
+ order = order[:testSize]
+ for i, j := range order {
+ if !s.Add(Range{j, j + rand.Intn(intervalLength-1) + 1}, j+valueOffset) {
+ t.Errorf("Iteration %d: failed to insert segment with key %d", i, j)
+ break
+ }
+ if err := checkSetMaxGap(&s); err != nil {
+ t.Errorf("When inserting %d: %v", j, err)
+ break
+ }
+ }
+ end := s.LastSegment().End()
+ shuffle(order)
+ order = order[:testSize/2]
+ for _, j := range order {
+ seg := s.FindSegment(j)
+ if !seg.Ok() {
+ continue
+ }
+ temprange := seg.Range()
+ s.Remove(seg)
+ if err := checkSetMaxGap(&s); err != nil {
+ t.Errorf("When removing %v: %v", temprange, err)
+ break
+ }
+ }
+ minSize := 7
+ var gapArr1 []int
+ for gap := s.UpperBoundGap(end + intervalLength).PrevLargeEnoughGap(minSize); gap.Ok(); gap = gap.PrevLargeEnoughGap(minSize) {
+ if gap.Range().Length() < minSize {
+ t.Errorf("PrevLargeEnoughGap wrong, gap length %d, wanted %d", gap.Range().Length(), minSize)
+ } else {
+ gapArr1 = append(gapArr1, gap.Range().Start)
+ }
+ }
+ var gapArr2 []int
+ for gap := s.UpperBoundGap(end + intervalLength).PrevGap(); gap.Ok(); gap = gap.PrevGap() {
+ if gap.Range().Length() >= minSize {
+ gapArr2 = append(gapArr2, gap.Range().Start)
+ }
+ }
+ if !reflect.DeepEqual(gapArr2, gapArr1) {
+ t.Errorf("Search result not correct, got: %v, wanted: %v", gapArr1, gapArr2)
+ }
+ if t.Failed() {
+ t.Logf("Set contents:\n%v", &s)
+ t.FailNow()
+ }
+}
+
func TestAddSequentialAdjacent(t *testing.T) {
var s Set
var nrInsertions int
@@ -148,12 +449,12 @@ func TestAddSequentialAdjacent(t *testing.T) {
t.Fatalf("Failed to insert segment %d", i)
}
nrInsertions++
- if err := checkSet(&s, nrInsertions); err != nil {
+ if err := s.segmentTestCheck(nrInsertions, validate); err != nil {
t.Errorf("Iteration %d: %v", i, err)
break
}
}
- if got, want := countSegmentsIn(&s), nrInsertions; got != want {
+ if got, want := s.countSegments(), nrInsertions; got != want {
t.Errorf("Wrong final number of segments: got %d, wanted %d", got, want)
}
if t.Failed() {
@@ -202,12 +503,12 @@ func TestAddSequentialNonAdjacent(t *testing.T) {
t.Fatalf("Failed to insert segment %d", i)
}
nrInsertions++
- if err := checkSet(&s, nrInsertions); err != nil {
+ if err := s.segmentTestCheck(nrInsertions, validate); err != nil {
t.Errorf("Iteration %d: %v", i, err)
break
}
}
- if got, want := countSegmentsIn(&s), nrInsertions; got != want {
+ if got, want := s.countSegments(), nrInsertions; got != want {
t.Errorf("Wrong final number of segments: got %d, wanted %d", got, want)
}
if t.Failed() {
@@ -293,7 +594,7 @@ Tests:
var i int
for seg := s.FirstSegment(); seg.Ok(); seg = seg.NextSegment() {
if i > len(test.final) {
- t.Errorf("%s: Incorrect number of segments: got %d, wanted %d; set contents:\n%v", test.name, countSegmentsIn(&s), len(test.final), &s)
+ t.Errorf("%s: Incorrect number of segments: got %d, wanted %d; set contents:\n%v", test.name, s.countSegments(), len(test.final), &s)
continue Tests
}
if got, want := seg.Range(), test.final[i]; got != want {
@@ -351,7 +652,7 @@ Tests:
var i int
for seg := s.FirstSegment(); seg.Ok(); seg = seg.NextSegment() {
if i > len(test.final) {
- t.Errorf("%s: Incorrect number of segments: got %d, wanted %d; set contents:\n%v", test.name, countSegmentsIn(&s), len(test.final), &s)
+ t.Errorf("%s: Incorrect number of segments: got %d, wanted %d; set contents:\n%v", test.name, s.countSegments(), len(test.final), &s)
continue Tests
}
if got, want := seg.Range(), test.final[i]; got != want {
@@ -378,7 +679,7 @@ func benchmarkAddSequential(b *testing.B, size int) {
}
func benchmarkAddRandom(b *testing.B, size int) {
- order := randPermutation(size)
+ order := rand.Perm(size)
b.ResetTimer()
for n := 0; n < b.N; n++ {
@@ -416,7 +717,7 @@ func benchmarkFindRandom(b *testing.B, size int) {
b.Fatalf("Failed to insert segment %d", i)
}
}
- order := randPermutation(size)
+ order := rand.Perm(size)
b.ResetTimer()
for n := 0; n < b.N; n++ {
@@ -470,7 +771,7 @@ func benchmarkAddFindRemoveSequential(b *testing.B, size int) {
}
func benchmarkAddFindRemoveRandom(b *testing.B, size int) {
- order := randPermutation(size)
+ order := rand.Perm(size)
b.ResetTimer()
for n := 0; n < b.N; n++ {
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-08 10:12:45 +0000