mirror of
https://github.com/VictoriaMetrics/VictoriaMetrics.git
synced 2024-11-21 14:44:00 +00:00
f3ec424e7d
* Remember the last accessed bucket on Has() call. * Inline fast paths inside Add() and Has() calls. * Remove fragile code with maxUnsortedBuckets inside bucket32.
690 lines
18 KiB
Go
690 lines
18 KiB
Go
package uint64set
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import (
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"fmt"
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"math/rand"
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"reflect"
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"sort"
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"testing"
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"time"
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)
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func TestSetOps(t *testing.T) {
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f := func(a, b []uint64) {
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t.Helper()
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mUnion := make(map[uint64]bool)
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mIntersect := make(map[uint64]bool)
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ma := make(map[uint64]bool)
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sa := &Set{}
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sb := &Set{}
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for _, v := range a {
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sa.Add(v)
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ma[v] = true
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mUnion[v] = true
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}
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for _, v := range b {
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sb.Add(v)
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mUnion[v] = true
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if ma[v] {
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mIntersect[v] = true
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}
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}
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saOrig := sa.Clone()
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if !saOrig.Equal(sa) {
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t.Fatalf("saOrig must be equal to sa; got\n%v\nvs\n%v", saOrig, sa)
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}
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sbOrig := sb.Clone()
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if !sbOrig.Equal(sb) {
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t.Fatalf("sbOrig must be equal to sb; got\n%v\nvs\n%v", sbOrig, sb)
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}
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// Verify sa.Union(sb)
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sa.Union(sb)
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if err := expectEqual(sa, mUnion); err != nil {
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t.Fatalf("ivalid sa.Union(sb): %s", err)
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}
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if !sbOrig.Equal(sb) {
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t.Fatalf("sbOrig must be equal to sb after sa.Union(sb); got\n%v\nvs\n%v", sbOrig, sb)
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}
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// Verify sb.Union(sa)
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sa = saOrig.Clone()
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sb.Union(sa)
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if err := expectEqual(sb, mUnion); err != nil {
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t.Fatalf("invalid sb.Union(sa): %s", err)
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}
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if !saOrig.Equal(sa) {
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t.Fatalf("saOrig must be equal to sa after sb.Union(sa); got\n%v\nvs\n%v", saOrig, sa)
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}
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// Verify sa.UnionMayOwn(sb)
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sa = saOrig.Clone()
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sb = sbOrig.Clone()
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sa.UnionMayOwn(sb)
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if err := expectEqual(sa, mUnion); err != nil {
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t.Fatalf("invalid sa.UnionMayOwn(sb): %s", err)
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}
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if !sbOrig.Equal(sb) {
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t.Fatalf("sbOrig must be equal to sb after sa.UnionMayOwn(sb); got\n%v\nvs\n%v", sbOrig, sb)
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}
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// Verify sb.UnionMayOwn(sa)
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sa = saOrig.Clone()
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sb.UnionMayOwn(sa)
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if err := expectEqual(sb, mUnion); err != nil {
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t.Fatalf("invalid sb.UnionMayOwn(sa): %s", err)
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}
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if !saOrig.Equal(sa) {
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t.Fatalf("saOrig must be equal to sa after sb.UnionMayOwn(sa); got\n%v\nvs\n%v", saOrig, sa)
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}
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// Verify sa.Intersect(sb)
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sa = saOrig.Clone()
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sb = sbOrig.Clone()
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sa.Intersect(sb)
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if err := expectEqual(sa, mIntersect); err != nil {
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t.Fatalf("invalid sa.Intersect(sb): %s", err)
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}
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if !sbOrig.Equal(sb) {
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t.Fatalf("sbOrig must be equal to sb after sa.Intersect(sb); got\n%v\nvs\n%v", sbOrig, sb)
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}
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// Verify sb.Intersect(sa)
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sa = saOrig.Clone()
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sb.Intersect(sa)
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if err := expectEqual(sb, mIntersect); err != nil {
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t.Fatalf("invalid sb.Intersect(sa): %s", err)
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}
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if !saOrig.Equal(sa) {
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t.Fatalf("saOrig must be equal to sa after sb.Intersect(sa); got\n%v\nvs\n%v", saOrig, sa)
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}
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// Verify sa.Subtract(sb)
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mSubtractAB := make(map[uint64]bool)
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for _, v := range a {
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mSubtractAB[v] = true
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}
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for _, v := range b {
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delete(mSubtractAB, v)
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}
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sa = saOrig.Clone()
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sb = sbOrig.Clone()
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sa.Subtract(sb)
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if err := expectEqual(sa, mSubtractAB); err != nil {
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t.Fatalf("invalid sa.Subtract(sb): %s", err)
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}
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if !sbOrig.Equal(sb) {
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t.Fatalf("sbOrig must be equal to sb after sa.Subtract(sb); got\n%v\nvs\n%v", sbOrig, sb)
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}
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// Verify sb.Subtract(sa)
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mSubtractBA := make(map[uint64]bool)
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for _, v := range b {
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mSubtractBA[v] = true
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}
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for _, v := range a {
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delete(mSubtractBA, v)
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}
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sa = saOrig.Clone()
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sb.Subtract(sa)
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if err := expectEqual(sb, mSubtractBA); err != nil {
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t.Fatalf("invalid sb.Subtract(sa): %s", err)
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}
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if !saOrig.Equal(sa) {
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t.Fatalf("saOrig must be equal to sa after sb.Subtract(sa); got\n%v\nvs\n%v", saOrig, sa)
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}
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}
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f(nil, nil)
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f([]uint64{1}, nil)
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f([]uint64{1, 2, 3}, nil)
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f([]uint64{1, 2, 3, 1 << 16, 1 << 32, 2 << 32}, nil)
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f([]uint64{1}, []uint64{1})
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f([]uint64{0}, []uint64{1 << 16})
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f([]uint64{1}, []uint64{1 << 16})
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f([]uint64{1}, []uint64{4 << 16})
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f([]uint64{1}, []uint64{1 << 32})
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f([]uint64{1}, []uint64{1 << 32, 2 << 32})
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f([]uint64{1}, []uint64{2 << 32})
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f([]uint64{1, 1<<16 - 1}, []uint64{1 << 16})
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f([]uint64{0, 1<<16 - 1}, []uint64{1 << 16, 1<<16 - 1})
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f([]uint64{0, 1<<16 - 1}, []uint64{1 << 16, 1<<16 - 1, 2 << 16, 8 << 16})
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f([]uint64{0}, []uint64{1 << 16, 1<<16 - 1, 2 << 16, 8 << 16})
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f([]uint64{0, 2 << 16}, []uint64{1 << 16})
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f([]uint64{0, 2 << 16}, []uint64{1 << 16, 3 << 16})
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f([]uint64{0, 2 << 16}, []uint64{1 << 16, 2 << 16})
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f([]uint64{0, 2 << 16}, []uint64{1 << 16, 2 << 16, 3 << 16})
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f([]uint64{0, 2 << 32}, []uint64{1 << 32})
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f([]uint64{0, 2 << 32}, []uint64{1 << 32, 3 << 32})
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f([]uint64{0, 2 << 32}, []uint64{1 << 32, 2 << 32})
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f([]uint64{0, 2 << 32}, []uint64{1 << 32, 2 << 32, 3 << 32})
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var a []uint64
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for i := 0; i < 100; i++ {
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a = append(a, uint64(i))
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}
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var b []uint64
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for i := 1 << 16; i < 1<<16+1000; i++ {
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b = append(b, uint64(i))
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}
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f(a, b)
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for i := 1<<16 - 100; i < 1<<16+100; i++ {
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a = append(a, uint64(i))
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}
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for i := uint64(1) << 32; i < 1<<32+1<<16+200; i++ {
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b = append(b, i)
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}
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f(a, b)
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rng := rand.New(rand.NewSource(0))
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for i := 0; i < 10; i++ {
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a = nil
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b = nil
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for j := 0; j < 1000; j++ {
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a = append(a, uint64(rng.Intn(1e6)))
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b = append(b, uint64(rng.Intn(1e6)))
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}
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f(a, b)
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}
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}
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func expectEqual(s *Set, m map[uint64]bool) error {
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if s.Len() != len(m) {
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return fmt.Errorf("unexpected s.Len(); got %d; want %d\ns=%v\nm=%v", s.Len(), len(m), s.AppendTo(nil), m)
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}
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for _, v := range s.AppendTo(nil) {
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if !m[v] {
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return fmt.Errorf("missing value %d in m; s=%v\nm=%v", v, s.AppendTo(nil), m)
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}
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}
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// Additional check via s.Has()
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for v := range m {
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if !s.Has(v) {
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return fmt.Errorf("missing value %d in s; s=%v\nm=%v", v, s.AppendTo(nil), m)
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}
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}
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// Extra check via s.ForEach()
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var err error
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s.ForEach(func(part []uint64) bool {
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for _, v := range part {
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if !m[v] {
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err = fmt.Errorf("miising value %d in m inside s.ForEach; s=%v\nm=%v", v, s.AppendTo(nil), m)
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return false
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}
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}
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return true
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})
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return err
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}
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func TestSetBasicOps(t *testing.T) {
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for _, itemsCount := range []int{1, 2, 3, 4, 5, 6, 1e2, 1e3, 1e4, 1e5, 1e6} {
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t.Run(fmt.Sprintf("items_%d", itemsCount), func(t *testing.T) {
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testSetBasicOps(t, itemsCount)
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})
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}
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}
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func testSetBasicOps(t *testing.T, itemsCount int) {
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var s Set
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offset := uint64(time.Now().UnixNano())
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// Verify operations on nil set
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{
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var sNil *Set
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if n := sNil.SizeBytes(); n != 0 {
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t.Fatalf("sNil.SizeBytes must return 0; got %d", n)
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}
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if sNil.Has(123) {
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t.Fatalf("sNil shouldn't contain any item; found 123")
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}
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if n := sNil.Len(); n != 0 {
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t.Fatalf("unexpected sNil.Len(); got %d; want 0", n)
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}
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result := sNil.AppendTo(nil)
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if result != nil {
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t.Fatalf("sNil.AppendTo(nil) must return nil")
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}
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buf := []uint64{1, 2, 3}
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result = sNil.AppendTo(buf)
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if !reflect.DeepEqual(result, buf) {
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t.Fatalf("sNil.AppendTo(buf) must return buf")
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}
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sCopy := sNil.Clone()
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if n := sCopy.Len(); n != 0 {
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t.Fatalf("unexpected sCopy.Len() from nil set; got %d; want 0", n)
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}
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sCopy.Add(123)
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if n := sCopy.Len(); n != 1 {
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t.Fatalf("unexpected sCopy.Len() after adding an item; got %d; want 1", n)
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}
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sCopy.Add(123)
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if n := sCopy.Len(); n != 1 {
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t.Fatalf("unexpected sCopy.Len() after adding an item twice; got %d; want 1", n)
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}
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if !sCopy.Has(123) {
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t.Fatalf("sCopy must contain 123")
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}
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sCopy.Del(123)
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if n := sCopy.Len(); n != 0 {
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t.Fatalf("unexpected sCopy.Len() after deleting the item; got %d; want 0", n)
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}
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sCopy.Del(123)
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if n := sCopy.Len(); n != 0 {
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t.Fatalf("unexpected sCopy.Len() after double deleting the item; got %d; want 0", n)
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}
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}
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// Verify forward Add
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itemsCount = (itemsCount / 2) * 2
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for i := 0; i < itemsCount/2; i++ {
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s.Add(uint64(i) + offset)
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}
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if n := s.Len(); n != itemsCount/2 {
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t.Fatalf("unexpected s.Len() after forward Add; got %d; want %d", n, itemsCount/2)
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}
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if n := s.SizeBytes(); n == 0 {
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t.Fatalf("s.SizeBytes() must be greater than 0")
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}
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// Verify backward Add
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for i := 0; i < itemsCount/2; i++ {
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s.Add(uint64(itemsCount-i-1) + offset)
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}
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if n := s.Len(); n != itemsCount {
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t.Fatalf("unexpected s.Len() after backward Add; got %d; want %d", n, itemsCount)
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}
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// Verify repeated Add
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for i := 0; i < itemsCount/2; i++ {
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s.Add(uint64(i) + offset)
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}
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if n := s.Len(); n != itemsCount {
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t.Fatalf("unexpected s.Len() after repeated Add; got %d; want %d", n, itemsCount)
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}
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// Verify Has on existing bits
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for i := 0; i < itemsCount; i++ {
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if !s.Has(uint64(i) + offset) {
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t.Fatalf("missing bit %d", uint64(i)+offset)
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}
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}
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// Verify Has on missing bits
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for i := itemsCount; i < 2*itemsCount; i++ {
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if s.Has(uint64(i) + offset) {
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t.Fatalf("unexpected bit found: %d", uint64(i)+offset)
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}
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}
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// Verify Clone and Equal
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sCopy := s.Clone()
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if n := sCopy.Len(); n != itemsCount {
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t.Fatalf("unexpected sCopy.Len(); got %d; want %d", n, itemsCount)
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}
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for i := 0; i < itemsCount; i++ {
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if !sCopy.Has(uint64(i) + offset) {
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t.Fatalf("missing bit %d on sCopy", uint64(i)+offset)
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}
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}
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if !sCopy.Equal(&s) {
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t.Fatalf("s must equal to sCopy")
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}
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if !s.Equal(sCopy) {
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t.Fatalf("sCopy must equal to s")
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}
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if s.Len() > 0 {
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var sEmpty Set
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if s.Equal(&sEmpty) {
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t.Fatalf("s mustn't equal to sEmpty")
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}
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sNew := s.Clone()
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sNew.Del(offset)
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if sNew.Equal(&s) {
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t.Fatalf("sNew mustn't equal to s")
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}
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if s.Equal(sNew) {
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t.Fatalf("s mustn't equal to sNew")
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}
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sNew.Add(offset - 123)
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if sNew.Equal(&s) {
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t.Fatalf("sNew mustn't equal to s")
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}
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if s.Equal(sNew) {
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t.Fatalf("s mustn't equal to sNew")
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}
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}
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// Verify AppendTo
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a := s.AppendTo(nil)
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if len(a) != itemsCount {
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t.Fatalf("unexpected len of exported array; got %d; want %d; array:\n%d", len(a), itemsCount, a)
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}
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if !sort.SliceIsSorted(a, func(i, j int) bool { return a[i] < a[j] }) {
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t.Fatalf("unsorted result returned from AppendTo: %d", a)
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}
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m := make(map[uint64]bool)
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for _, x := range a {
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m[x] = true
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}
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for i := 0; i < itemsCount; i++ {
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if !m[uint64(i)+offset] {
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t.Fatalf("missing bit %d in the exported bits; array:\n%d", uint64(i)+offset, a)
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}
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}
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// Verify ForEach
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{
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var s Set
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m := make(map[uint64]bool)
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for i := 0; i < itemsCount; i++ {
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v := uint64(i) + offset
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s.Add(v)
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m[v] = true
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}
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// Verify visiting all the items.
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s.ForEach(func(part []uint64) bool {
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for _, v := range part {
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if !m[v] {
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t.Fatalf("unexpected value v=%d passed to ForEach", v)
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}
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delete(m, v)
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}
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return true
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})
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if len(m) != 0 {
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t.Fatalf("ForEach didn't visit %d items; items: %v", len(m), m)
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}
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// Verify fast stop
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calls := 0
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s.ForEach(func(part []uint64) bool {
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calls++
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return false
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})
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if itemsCount > 0 && calls != 1 {
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t.Fatalf("Unexpected number of ForEach callback calls; got %d; want %d", calls, 1)
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}
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// Verify ForEach on nil set.
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var s1 *Set
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s1.ForEach(func(part []uint64) bool {
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t.Fatalf("callback shouldn't be called on empty set")
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return true
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})
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}
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// Verify union
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{
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const unionOffset = 12345
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var s1, s2 Set
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for i := 0; i < itemsCount; i++ {
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s1.Add(uint64(i) + offset)
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s2.Add(uint64(i) + offset + unionOffset)
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}
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s1.Union(&s2)
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expectedLen := 2 * itemsCount
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if itemsCount > unionOffset {
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expectedLen = itemsCount + unionOffset
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}
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if n := s1.Len(); n != expectedLen {
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t.Fatalf("unexpected s1.Len() after union; got %d; want %d", n, expectedLen)
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}
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// Verify union on empty set.
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var s3 Set
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s3.Union(&s1)
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expectedLen = s1.Len()
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if n := s3.Len(); n != expectedLen {
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t.Fatalf("unexpected s3.Len() after union with empty set; got %d; want %d", n, expectedLen)
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}
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var s4 Set
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expectedLen = s3.Len()
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s3.Union(&s4)
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if n := s3.Len(); n != expectedLen {
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t.Fatalf("unexpected s3.Len() after union with empty set; got %d; want %d", n, expectedLen)
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}
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}
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// Verify UnionMayOwn
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{
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const unionOffset = 12345
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var s1, s2 Set
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for i := 0; i < itemsCount; i++ {
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s1.Add(uint64(i) + offset)
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s2.Add(uint64(i) + offset + unionOffset)
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}
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s1.UnionMayOwn(&s2)
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expectedLen := 2 * itemsCount
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if itemsCount > unionOffset {
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expectedLen = itemsCount + unionOffset
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}
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if n := s1.Len(); n != expectedLen {
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t.Fatalf("unexpected s1.Len() after union; got %d; want %d", n, expectedLen)
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}
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// Verify union on empty set.
|
|
var s3 Set
|
|
expectedLen = s1.Len()
|
|
s3.UnionMayOwn(&s1)
|
|
if n := s3.Len(); n != expectedLen {
|
|
t.Fatalf("unexpected s3.Len() after union with empty set; got %d; want %d", n, expectedLen)
|
|
}
|
|
var s4 Set
|
|
expectedLen = s3.Len()
|
|
s3.UnionMayOwn(&s4)
|
|
if n := s3.Len(); n != expectedLen {
|
|
t.Fatalf("unexpected s3.Len() after union with empty set; got %d; want %d", n, expectedLen)
|
|
}
|
|
}
|
|
|
|
// Verify intersect
|
|
{
|
|
// Verify s1.Intersect(s2) and s2.Intersect(s1)
|
|
var s1, s2 Set
|
|
for _, intersectOffset := range []uint64{123, 12345, 1<<32 + 4343} {
|
|
s1 = Set{}
|
|
s2 = Set{}
|
|
for i := 0; i < itemsCount; i++ {
|
|
s1.Add(uint64(i) + offset)
|
|
s2.Add(uint64(i) + offset + intersectOffset)
|
|
}
|
|
expectedLen := 0
|
|
if uint64(itemsCount) > intersectOffset {
|
|
expectedLen = int(uint64(itemsCount) - intersectOffset)
|
|
}
|
|
s1Copy := s1.Clone()
|
|
s1Copy.Intersect(&s2)
|
|
if n := s1Copy.Len(); n != expectedLen {
|
|
t.Fatalf("unexpected s1.Len() after intersect; got %d; want %d", n, expectedLen)
|
|
}
|
|
s2.Intersect(&s1)
|
|
if n := s2.Len(); n != expectedLen {
|
|
t.Fatalf("unexpected s2.Len() after intersect; got %d; want %d", n, expectedLen)
|
|
}
|
|
}
|
|
|
|
// Verify intersect on empty set.
|
|
var s3 Set
|
|
s2.Intersect(&s3)
|
|
expectedLen := 0
|
|
if n := s2.Len(); n != expectedLen {
|
|
t.Fatalf("unexpected s3.Len() after intersect with empty set; got %d; want %d", n, expectedLen)
|
|
}
|
|
var s4 Set
|
|
s4.Intersect(&s1)
|
|
if n := s4.Len(); n != expectedLen {
|
|
t.Fatalf("unexpected s4.Len() after intersect with empty set; got %d; want %d", n, expectedLen)
|
|
}
|
|
}
|
|
|
|
// Verify subtract
|
|
{
|
|
const subtractOffset = 12345
|
|
var s1, s2 Set
|
|
for i := 0; i < itemsCount; i++ {
|
|
s1.Add(uint64(i) + offset)
|
|
s2.Add(uint64(i) + offset + subtractOffset)
|
|
}
|
|
s1.Subtract(&s2)
|
|
expectedLen := itemsCount
|
|
if itemsCount > subtractOffset {
|
|
expectedLen = subtractOffset
|
|
}
|
|
if n := s1.Len(); n != expectedLen {
|
|
t.Fatalf("unexpected s1.Len() after subtract; got %d; want %d", n, expectedLen)
|
|
}
|
|
|
|
// Verify subtract from empty set.
|
|
var s3 Set
|
|
s3.Subtract(&s2)
|
|
expectedLen = 0
|
|
if n := s3.Len(); n != 0 {
|
|
t.Fatalf("unexpected s3.Len() after subtract from empty set; got %d; want %d", n, expectedLen)
|
|
}
|
|
}
|
|
|
|
// Verify Del
|
|
itemsDeleted := 0
|
|
for i := itemsCount / 2; i < itemsCount-itemsCount/4; i++ {
|
|
s.Del(uint64(i) + offset)
|
|
itemsDeleted++
|
|
}
|
|
if n := s.Len(); n != itemsCount-itemsDeleted {
|
|
t.Fatalf("unexpected s.Len() after Del; got %d; want %d", n, itemsCount-itemsDeleted)
|
|
}
|
|
a = s.AppendTo(a[:0])
|
|
if len(a) != itemsCount-itemsDeleted {
|
|
t.Fatalf("unexpected len of exported array; got %d; want %d", len(a), itemsCount-itemsDeleted)
|
|
}
|
|
m = make(map[uint64]bool)
|
|
for _, x := range a {
|
|
m[x] = true
|
|
}
|
|
for i := 0; i < itemsCount; i++ {
|
|
if i >= itemsCount/2 && i < itemsCount-itemsCount/4 {
|
|
if m[uint64(i)+offset] {
|
|
t.Fatalf("unexpected bit found after deleting: %d", uint64(i)+offset)
|
|
}
|
|
} else {
|
|
if !m[uint64(i)+offset] {
|
|
t.Fatalf("missing bit %d in the exported bits after deleting", uint64(i)+offset)
|
|
}
|
|
}
|
|
}
|
|
|
|
// Try Del for non-existing items
|
|
for i := itemsCount / 2; i < itemsCount-itemsCount/4; i++ {
|
|
s.Del(uint64(i) + offset)
|
|
s.Del(uint64(i) + offset)
|
|
s.Del(uint64(i) + offset + uint64(itemsCount))
|
|
}
|
|
if n := s.Len(); n != itemsCount-itemsDeleted {
|
|
t.Fatalf("unexpected s.Len() after Del for non-existing items; got %d; want %d", n, itemsCount-itemsDeleted)
|
|
}
|
|
|
|
// Verify sCopy has the original data
|
|
if n := sCopy.Len(); n != itemsCount {
|
|
t.Fatalf("unexpected sCopy.Len(); got %d; want %d", n, itemsCount)
|
|
}
|
|
for i := 0; i < itemsCount; i++ {
|
|
if !sCopy.Has(uint64(i) + offset) {
|
|
t.Fatalf("missing bit %d on sCopy", uint64(i)+offset)
|
|
}
|
|
}
|
|
}
|
|
|
|
func TestSetSparseItems(t *testing.T) {
|
|
for _, itemsCount := range []int{1e2, 1e3, 1e4} {
|
|
t.Run(fmt.Sprintf("items_%d", itemsCount), func(t *testing.T) {
|
|
testSetSparseItems(t, itemsCount)
|
|
})
|
|
}
|
|
}
|
|
|
|
func testSetSparseItems(t *testing.T, itemsCount int) {
|
|
var s Set
|
|
m := make(map[uint64]bool)
|
|
for i := 0; i < itemsCount; i++ {
|
|
x := rand.Uint64()
|
|
s.Add(x)
|
|
m[x] = true
|
|
}
|
|
if n := s.Len(); n != len(m) {
|
|
t.Fatalf("unexpected Len(); got %d; want %d", n, len(m))
|
|
}
|
|
if n := s.SizeBytes(); n == 0 {
|
|
t.Fatalf("SizeBytes() must return value greater than 0")
|
|
}
|
|
|
|
// Check Has
|
|
for x := range m {
|
|
if !s.Has(x) {
|
|
t.Fatalf("missing item %d", x)
|
|
}
|
|
}
|
|
for i := 0; i < itemsCount; i++ {
|
|
x := uint64(i)
|
|
if m[x] {
|
|
continue
|
|
}
|
|
if s.Has(x) {
|
|
t.Fatalf("unexpected item found %d", x)
|
|
}
|
|
}
|
|
|
|
// Check Clone
|
|
sCopy := s.Clone()
|
|
if n := sCopy.Len(); n != len(m) {
|
|
t.Fatalf("unexpected sCopy.Len(); got %d; want %d", n, len(m))
|
|
}
|
|
for x := range m {
|
|
if !sCopy.Has(x) {
|
|
t.Fatalf("missing item %d on sCopy", x)
|
|
}
|
|
}
|
|
|
|
// Check AppendTo
|
|
a := s.AppendTo(nil)
|
|
if len(a) != len(m) {
|
|
t.Fatalf("unexpected len for AppendTo result; got %d; want %d", len(a), len(m))
|
|
}
|
|
if !sort.SliceIsSorted(a, func(i, j int) bool { return a[i] < a[j] }) {
|
|
t.Fatalf("unsorted result returned from AppendTo: %d", a)
|
|
}
|
|
for _, x := range a {
|
|
if !m[x] {
|
|
t.Fatalf("unexpected item found in AppendTo result: %d", x)
|
|
}
|
|
}
|
|
|
|
// Check Del
|
|
for x := range m {
|
|
s.Del(x)
|
|
s.Del(x)
|
|
s.Del(x + 1)
|
|
s.Del(x - 1)
|
|
}
|
|
if n := s.Len(); n != 0 {
|
|
t.Fatalf("unexpected number of items left after Del; got %d; want 0", n)
|
|
}
|
|
a = s.AppendTo(a[:0])
|
|
if len(a) != 0 {
|
|
t.Fatalf("unexpected number of items returned from AppendTo after Del; got %d; want 0; items\n%d", len(a), a)
|
|
}
|
|
|
|
// Check items in sCopy
|
|
if n := sCopy.Len(); n != len(m) {
|
|
t.Fatalf("unexpected sCopy.Len() after Del; got %d; want %d", n, len(m))
|
|
}
|
|
for x := range m {
|
|
if !sCopy.Has(x) {
|
|
t.Fatalf("missing item %d on sCopy after Del", x)
|
|
}
|
|
}
|
|
}
|