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moby/libnetwork/bitmap/sequence_test.go
Cory Snider dea3f2b417 Migrate away from things deprecated in Go 1.20 
"math/rand".Seed
  - Migrate to using local RNG instances.

"archive/tar".TypeRegA
  - The deprecated constant tar.TypeRegA is the same value as
    tar.TypeReg and so is not needed at all.

Signed-off-by: Cory Snider <csnider@mirantis.com>
2023-02-15 12:30:32 -05:00

1125 lines
46 KiB
Go
Raw Blame History

package bitmap
import (
"math/rand"
"testing"
"time"
)
func TestSequenceGetAvailableBit(t *testing.T) {
input := []struct {
head *sequence
from uint64
bytePos uint64
bitPos uint64
}{
{&sequence{block: 0x0, count: 0}, 0, invalidPos, invalidPos},
{&sequence{block: 0x0, count: 1}, 0, 0, 0},
{&sequence{block: 0x0, count: 100}, 0, 0, 0},
{&sequence{block: 0x80000000, count: 0}, 0, invalidPos, invalidPos},
{&sequence{block: 0x80000000, count: 1}, 0, 0, 1},
{&sequence{block: 0x80000000, count: 100}, 0, 0, 1},
{&sequence{block: 0xFF000000, count: 0}, 0, invalidPos, invalidPos},
{&sequence{block: 0xFF000000, count: 1}, 0, 1, 0},
{&sequence{block: 0xFF000000, count: 100}, 0, 1, 0},
{&sequence{block: 0xFF800000, count: 0}, 0, invalidPos, invalidPos},
{&sequence{block: 0xFF800000, count: 1}, 0, 1, 1},
{&sequence{block: 0xFF800000, count: 100}, 0, 1, 1},
{&sequence{block: 0xFFC0FF00, count: 0}, 0, invalidPos, invalidPos},
{&sequence{block: 0xFFC0FF00, count: 1}, 0, 1, 2},
{&sequence{block: 0xFFC0FF00, count: 100}, 0, 1, 2},
{&sequence{block: 0xFFE0FF00, count: 0}, 0, invalidPos, invalidPos},
{&sequence{block: 0xFFE0FF00, count: 1}, 0, 1, 3},
{&sequence{block: 0xFFE0FF00, count: 100}, 0, 1, 3},
{&sequence{block: 0xFFFEFF00, count: 0}, 0, invalidPos, invalidPos},
{&sequence{block: 0xFFFEFF00, count: 1}, 0, 1, 7},
{&sequence{block: 0xFFFEFF00, count: 100}, 0, 1, 7},
{&sequence{block: 0xFFFFC0FF, count: 0}, 0, invalidPos, invalidPos},
{&sequence{block: 0xFFFFC0FF, count: 1}, 0, 2, 2},
{&sequence{block: 0xFFFFC0FF, count: 100}, 0, 2, 2},
{&sequence{block: 0xFFFFFF00, count: 0}, 0, invalidPos, invalidPos},
{&sequence{block: 0xFFFFFF00, count: 1}, 0, 3, 0},
{&sequence{block: 0xFFFFFF00, count: 100}, 0, 3, 0},
{&sequence{block: 0xFFFFFFFE, count: 0}, 0, invalidPos, invalidPos},
{&sequence{block: 0xFFFFFFFE, count: 1}, 0, 3, 7},
{&sequence{block: 0xFFFFFFFE, count: 100}, 0, 3, 7},
{&sequence{block: 0xFFFFFFFF, count: 0}, 0, invalidPos, invalidPos},
{&sequence{block: 0xFFFFFFFF, count: 1}, 0, invalidPos, invalidPos},
{&sequence{block: 0xFFFFFFFF, count: 100}, 0, invalidPos, invalidPos},
// now test with offset
{&sequence{block: 0x0, count: 0}, 0, invalidPos, invalidPos},
{&sequence{block: 0x0, count: 0}, 31, invalidPos, invalidPos},
{&sequence{block: 0x0, count: 0}, 32, invalidPos, invalidPos},
{&sequence{block: 0x0, count: 1}, 0, 0, 0},
{&sequence{block: 0x0, count: 1}, 1, 0, 1},
{&sequence{block: 0x0, count: 1}, 31, 3, 7},
{&sequence{block: 0xF0FF0000, count: 1}, 0, 0, 4},
{&sequence{block: 0xF0FF0000, count: 1}, 8, 2, 0},
{&sequence{block: 0xFFFFFFFF, count: 1}, 0, invalidPos, invalidPos},
{&sequence{block: 0xFFFFFFFF, count: 1}, 16, invalidPos, invalidPos},
{&sequence{block: 0xFFFFFFFF, count: 1}, 31, invalidPos, invalidPos},
{&sequence{block: 0xFFFFFFFE, count: 1}, 0, 3, 7},
{&sequence{block: 0xFFFFFFFF, count: 2}, 0, invalidPos, invalidPos},
{&sequence{block: 0xFFFFFFFF, count: 2}, 32, invalidPos, invalidPos},
}
for n, i := range input {
b, bb, err := i.head.getAvailableBit(i.from)
if b != i.bytePos || bb != i.bitPos {
t.Fatalf("Error in sequence.getAvailableBit(%d) (%d).\nExp: (%d, %d)\nGot: (%d, %d), err: %v", i.from, n, i.bytePos, i.bitPos, b, bb, err)
}
}
}
func TestSequenceEqual(t *testing.T) {
input := []struct {
first *sequence
second *sequence
areEqual bool
}{
{&sequence{block: 0x0, count: 8, next: nil}, &sequence{block: 0x0, count: 8}, true},
{&sequence{block: 0x0, count: 0, next: nil}, &sequence{block: 0x0, count: 0}, true},
{&sequence{block: 0x0, count: 2, next: nil}, &sequence{block: 0x0, count: 1, next: &sequence{block: 0x0, count: 1}}, false},
{&sequence{block: 0x0, count: 2, next: &sequence{block: 0x1, count: 1}}, &sequence{block: 0x0, count: 2}, false},
{&sequence{block: 0x12345678, count: 8, next: nil}, &sequence{block: 0x12345678, count: 8}, true},
{&sequence{block: 0x12345678, count: 8, next: nil}, &sequence{block: 0x12345678, count: 9}, false},
{&sequence{block: 0x12345678, count: 1, next: &sequence{block: 0xFFFFFFFF, count: 1}}, &sequence{block: 0x12345678, count: 1}, false},
{&sequence{block: 0x12345678, count: 1}, &sequence{block: 0x12345678, count: 1, next: &sequence{block: 0xFFFFFFFF, count: 1}}, false},
}
for n, i := range input {
if i.areEqual != i.first.equal(i.second) {
t.Fatalf("Error in sequence.equal() (%d).\nExp: %t\nGot: %t,", n, i.areEqual, !i.areEqual)
}
}
}
func TestSequenceCopy(t *testing.T) {
s := getTestSequence()
n := s.getCopy()
if !s.equal(n) {
t.Fatal("copy of s failed")
}
if n == s {
t.Fatal("not true copy of s")
}
}
func TestGetFirstAvailable(t *testing.T) {
input := []struct {
mask *sequence
bytePos uint64
bitPos uint64
start uint64
}{
{&sequence{block: 0xffffffff, count: 2048}, invalidPos, invalidPos, 0},
{&sequence{block: 0x0, count: 8}, 0, 0, 0},
{&sequence{block: 0x80000000, count: 8}, 0, 1, 0},
{&sequence{block: 0xC0000000, count: 8}, 0, 2, 0},
{&sequence{block: 0xE0000000, count: 8}, 0, 3, 0},
{&sequence{block: 0xF0000000, count: 8}, 0, 4, 0},
{&sequence{block: 0xF8000000, count: 8}, 0, 5, 0},
{&sequence{block: 0xFC000000, count: 8}, 0, 6, 0},
{&sequence{block: 0xFE000000, count: 8}, 0, 7, 0},
{&sequence{block: 0xFE000000, count: 8}, 3, 0, 24},
{&sequence{block: 0xffffffff, count: 1, next: &sequence{block: 0x00000000, count: 1, next: &sequence{block: 0xffffffff, count: 6}}}, 4, 0, 0},
{&sequence{block: 0xffffffff, count: 1, next: &sequence{block: 0x80000000, count: 1, next: &sequence{block: 0xffffffff, count: 6}}}, 4, 1, 0},
{&sequence{block: 0xffffffff, count: 1, next: &sequence{block: 0xC0000000, count: 1, next: &sequence{block: 0xffffffff, count: 6}}}, 4, 2, 0},
{&sequence{block: 0xffffffff, count: 1, next: &sequence{block: 0xE0000000, count: 1, next: &sequence{block: 0xffffffff, count: 6}}}, 4, 3, 0},
{&sequence{block: 0xffffffff, count: 1, next: &sequence{block: 0xF0000000, count: 1, next: &sequence{block: 0xffffffff, count: 6}}}, 4, 4, 0},
{&sequence{block: 0xffffffff, count: 1, next: &sequence{block: 0xF8000000, count: 1, next: &sequence{block: 0xffffffff, count: 6}}}, 4, 5, 0},
{&sequence{block: 0xffffffff, count: 1, next: &sequence{block: 0xFC000000, count: 1, next: &sequence{block: 0xffffffff, count: 6}}}, 4, 6, 0},
{&sequence{block: 0xffffffff, count: 1, next: &sequence{block: 0xFE000000, count: 1, next: &sequence{block: 0xffffffff, count: 6}}}, 4, 7, 0},
{&sequence{block: 0xffffffff, count: 1, next: &sequence{block: 0x0E000000, count: 1, next: &sequence{block: 0xffffffff, count: 6}}}, 4, 0, 16},
{&sequence{block: 0xffffffff, count: 1, next: &sequence{block: 0xFF000000, count: 1, next: &sequence{block: 0xffffffff, count: 6}}}, 5, 0, 0},
{&sequence{block: 0xffffffff, count: 1, next: &sequence{block: 0xFF800000, count: 1, next: &sequence{block: 0xffffffff, count: 6}}}, 5, 1, 0},
{&sequence{block: 0xffffffff, count: 1, next: &sequence{block: 0xFFC00000, count: 1, next: &sequence{block: 0xffffffff, count: 6}}}, 5, 2, 0},
{&sequence{block: 0xffffffff, count: 1, next: &sequence{block: 0xFFE00000, count: 1, next: &sequence{block: 0xffffffff, count: 6}}}, 5, 3, 0},
{&sequence{block: 0xffffffff, count: 1, next: &sequence{block: 0xFFF00000, count: 1, next: &sequence{block: 0xffffffff, count: 6}}}, 5, 4, 0},
{&sequence{block: 0xffffffff, count: 1, next: &sequence{block: 0xFFF80000, count: 1, next: &sequence{block: 0xffffffff, count: 6}}}, 5, 5, 0},
{&sequence{block: 0xffffffff, count: 1, next: &sequence{block: 0xFFFC0000, count: 1, next: &sequence{block: 0xffffffff, count: 6}}}, 5, 6, 0},
{&sequence{block: 0xffffffff, count: 1, next: &sequence{block: 0xFFFE0000, count: 1, next: &sequence{block: 0xffffffff, count: 6}}}, 5, 7, 0},
{&sequence{block: 0xffffffff, count: 1, next: &sequence{block: 0xfffffffe, count: 1, next: &sequence{block: 0xffffffff, count: 6}}}, 7, 7, 0},
{&sequence{block: 0xffffffff, count: 2, next: &sequence{block: 0x0, count: 6}}, 8, 0, 0},
{&sequence{block: 0xfffcffff, count: 1, next: &sequence{block: 0x0, count: 6}}, 4, 0, 16},
{&sequence{block: 0xfffcffff, count: 1, next: &sequence{block: 0x0, count: 6}}, 1, 7, 15},
{&sequence{block: 0xfffcffff, count: 1, next: &sequence{block: 0x0, count: 6}}, 1, 6, 10},
{&sequence{block: 0xfffcfffe, count: 1, next: &sequence{block: 0x0, count: 6}}, 3, 7, 31},
{&sequence{block: 0xfffcffff, count: 1, next: &sequence{block: 0xffffffff, count: 6}}, invalidPos, invalidPos, 31},
}
for n, i := range input {
bytePos, bitPos, _ := getFirstAvailable(i.mask, i.start)
if bytePos != i.bytePos || bitPos != i.bitPos {
t.Fatalf("Error in (%d) getFirstAvailable(). Expected (%d, %d). Got (%d, %d)", n, i.bytePos, i.bitPos, bytePos, bitPos)
}
}
}
func TestFindSequence(t *testing.T) {
input := []struct {
head *sequence
bytePos uint64
precBlocks uint64
inBlockBytePos uint64
}{
{&sequence{block: 0xffffffff, count: 0}, 0, 0, invalidPos},
{&sequence{block: 0xffffffff, count: 0}, 31, 0, invalidPos},
{&sequence{block: 0xffffffff, count: 0}, 100, 0, invalidPos},
{&sequence{block: 0x0, count: 1}, 0, 0, 0},
{&sequence{block: 0x0, count: 1}, 1, 0, 1},
{&sequence{block: 0x0, count: 1}, 31, 0, invalidPos},
{&sequence{block: 0x0, count: 1}, 60, 0, invalidPos},
{&sequence{block: 0xffffffff, count: 10}, 0, 0, 0},
{&sequence{block: 0xffffffff, count: 10}, 3, 0, 3},
{&sequence{block: 0xffffffff, count: 10}, 4, 1, 0},
{&sequence{block: 0xffffffff, count: 10}, 7, 1, 3},
{&sequence{block: 0xffffffff, count: 10}, 8, 2, 0},
{&sequence{block: 0xffffffff, count: 10}, 39, 9, 3},
{&sequence{block: 0xffffffff, count: 10, next: &sequence{block: 0xcc000000, count: 10}}, 79, 9, 3},
{&sequence{block: 0xffffffff, count: 10, next: &sequence{block: 0xcc000000, count: 10}}, 80, 0, invalidPos},
}
for n, i := range input {
_, _, precBlocks, inBlockBytePos := findSequence(i.head, i.bytePos)
if precBlocks != i.precBlocks || inBlockBytePos != i.inBlockBytePos {
t.Fatalf("Error in (%d) findSequence(). Expected (%d, %d). Got (%d, %d)", n, i.precBlocks, i.inBlockBytePos, precBlocks, inBlockBytePos)
}
}
}
func TestCheckIfAvailable(t *testing.T) {
input := []struct {
head *sequence
ordinal uint64
bytePos uint64
bitPos uint64
}{
{&sequence{block: 0xffffffff, count: 0}, 0, invalidPos, invalidPos},
{&sequence{block: 0xffffffff, count: 0}, 31, invalidPos, invalidPos},
{&sequence{block: 0xffffffff, count: 0}, 100, invalidPos, invalidPos},
{&sequence{block: 0x0, count: 1}, 0, 0, 0},
{&sequence{block: 0x0, count: 1}, 1, 0, 1},
{&sequence{block: 0x0, count: 1}, 31, 3, 7},
{&sequence{block: 0x0, count: 1}, 60, invalidPos, invalidPos},
{&sequence{block: 0xffffffff, count: 1, next: &sequence{block: 0x800000ff, count: 1}}, 31, invalidPos, invalidPos},
{&sequence{block: 0xffffffff, count: 1, next: &sequence{block: 0x800000ff, count: 1}}, 32, invalidPos, invalidPos},
{&sequence{block: 0xffffffff, count: 1, next: &sequence{block: 0x800000ff, count: 1}}, 33, 4, 1},
{&sequence{block: 0xffffffff, count: 1, next: &sequence{block: 0xC00000ff, count: 1}}, 33, invalidPos, invalidPos},
{&sequence{block: 0xffffffff, count: 1, next: &sequence{block: 0xC00000ff, count: 1}}, 34, 4, 2},
{&sequence{block: 0xffffffff, count: 1, next: &sequence{block: 0xC00000ff, count: 1, next: &sequence{block: 0x0, count: 1}}}, 55, 6, 7},
{&sequence{block: 0xffffffff, count: 1, next: &sequence{block: 0xC00000ff, count: 1, next: &sequence{block: 0x0, count: 1}}}, 56, invalidPos, invalidPos},
{&sequence{block: 0xffffffff, count: 1, next: &sequence{block: 0xC00000ff, count: 1, next: &sequence{block: 0x0, count: 1}}}, 63, invalidPos, invalidPos},
{&sequence{block: 0xffffffff, count: 1, next: &sequence{block: 0xC00000ff, count: 1, next: &sequence{block: 0x0, count: 1}}}, 64, 8, 0},
{&sequence{block: 0xffffffff, count: 1, next: &sequence{block: 0xC00000ff, count: 1, next: &sequence{block: 0x0, count: 1}}}, 95, 11, 7},
{&sequence{block: 0xffffffff, count: 1, next: &sequence{block: 0xC00000ff, count: 1, next: &sequence{block: 0x0, count: 1}}}, 96, invalidPos, invalidPos},
}
for n, i := range input {
bytePos, bitPos, err := checkIfAvailable(i.head, i.ordinal)
if bytePos != i.bytePos || bitPos != i.bitPos {
t.Fatalf("Error in (%d) checkIfAvailable(ord:%d). Expected (%d, %d). Got (%d, %d). err: %v", n, i.ordinal, i.bytePos, i.bitPos, bytePos, bitPos, err)
}
}
}
func TestMergeSequences(t *testing.T) {
input := []struct {
original *sequence
merged *sequence
}{
{&sequence{block: 0xFE000000, count: 8, next: &sequence{block: 0xFE000000, count: 2}}, &sequence{block: 0xFE000000, count: 10}},
{&sequence{block: 0xFFFFFFFF, count: 8, next: &sequence{block: 0xFFFFFFFF, count: 1}}, &sequence{block: 0xFFFFFFFF, count: 9}},
{&sequence{block: 0xFFFFFFFF, count: 1, next: &sequence{block: 0xFFFFFFFF, count: 8}}, &sequence{block: 0xFFFFFFFF, count: 9}},
{&sequence{block: 0xFFFFFFF0, count: 8, next: &sequence{block: 0xFFFFFFF0, count: 1}}, &sequence{block: 0xFFFFFFF0, count: 9}},
{&sequence{block: 0xFFFFFFF0, count: 1, next: &sequence{block: 0xFFFFFFF0, count: 8}}, &sequence{block: 0xFFFFFFF0, count: 9}},
{&sequence{block: 0xFE, count: 8, next: &sequence{block: 0xFE, count: 1, next: &sequence{block: 0xFE, count: 5}}}, &sequence{block: 0xFE, count: 14}},
{&sequence{block: 0xFE, count: 8, next: &sequence{block: 0xFE, count: 1, next: &sequence{block: 0xFE, count: 5, next: &sequence{block: 0xFF, count: 1}}}},
&sequence{block: 0xFE, count: 14, next: &sequence{block: 0xFF, count: 1}}},
// No merge
{&sequence{block: 0xFE, count: 8, next: &sequence{block: 0xF8, count: 1, next: &sequence{block: 0xFE, count: 5}}},
&sequence{block: 0xFE, count: 8, next: &sequence{block: 0xF8, count: 1, next: &sequence{block: 0xFE, count: 5}}}},
// No merge from head: // Merge function tries to merge from passed head. If it can't merge with next, it does not reattempt with next as head
{&sequence{block: 0xFE, count: 8, next: &sequence{block: 0xFF, count: 1, next: &sequence{block: 0xFF, count: 5}}},
&sequence{block: 0xFE, count: 8, next: &sequence{block: 0xFF, count: 6}}},
}
for n, i := range input {
mergeSequences(i.original)
for !i.merged.equal(i.original) {
t.Fatalf("Error in (%d) mergeSequences().\nExp: %s\nGot: %s,", n, i.merged.toString(), i.original.toString())
}
}
}
func TestPushReservation(t *testing.T) {
input := []struct {
mask *sequence
bytePos uint64
bitPos uint64
newMask *sequence
}{
// Create first sequence and fill in 8 addresses starting from address 0
{&sequence{block: 0x0, count: 8, next: nil}, 0, 0, &sequence{block: 0x80000000, count: 1, next: &sequence{block: 0x0, count: 7, next: nil}}},
{&sequence{block: 0x80000000, count: 8}, 0, 1, &sequence{block: 0xC0000000, count: 1, next: &sequence{block: 0x80000000, count: 7, next: nil}}},
{&sequence{block: 0xC0000000, count: 8}, 0, 2, &sequence{block: 0xE0000000, count: 1, next: &sequence{block: 0xC0000000, count: 7, next: nil}}},
{&sequence{block: 0xE0000000, count: 8}, 0, 3, &sequence{block: 0xF0000000, count: 1, next: &sequence{block: 0xE0000000, count: 7, next: nil}}},
{&sequence{block: 0xF0000000, count: 8}, 0, 4, &sequence{block: 0xF8000000, count: 1, next: &sequence{block: 0xF0000000, count: 7, next: nil}}},
{&sequence{block: 0xF8000000, count: 8}, 0, 5, &sequence{block: 0xFC000000, count: 1, next: &sequence{block: 0xF8000000, count: 7, next: nil}}},
{&sequence{block: 0xFC000000, count: 8}, 0, 6, &sequence{block: 0xFE000000, count: 1, next: &sequence{block: 0xFC000000, count: 7, next: nil}}},
{&sequence{block: 0xFE000000, count: 8}, 0, 7, &sequence{block: 0xFF000000, count: 1, next: &sequence{block: 0xFE000000, count: 7, next: nil}}},
{&sequence{block: 0x80000000, count: 1, next: &sequence{block: 0x0, count: 7}}, 0, 1, &sequence{block: 0xC0000000, count: 1, next: &sequence{block: 0x0, count: 7, next: nil}}},
// Create second sequence and fill in 8 addresses starting from address 32
{&sequence{block: 0xffffffff, count: 1, next: &sequence{block: 0x00000000, count: 1, next: &sequence{block: 0xffffffff, count: 6, next: nil}}}, 4, 0,
&sequence{block: 0xffffffff, count: 1, next: &sequence{block: 0x80000000, count: 1, next: &sequence{block: 0xffffffff, count: 6}}}},
{&sequence{block: 0xffffffff, count: 1, next: &sequence{block: 0x80000000, count: 1, next: &sequence{block: 0xffffffff, count: 6}}}, 4, 1,
&sequence{block: 0xffffffff, count: 1, next: &sequence{block: 0xC0000000, count: 1, next: &sequence{block: 0xffffffff, count: 6}}}},
{&sequence{block: 0xffffffff, count: 1, next: &sequence{block: 0xC0000000, count: 1, next: &sequence{block: 0xffffffff, count: 6}}}, 4, 2,
&sequence{block: 0xffffffff, count: 1, next: &sequence{block: 0xE0000000, count: 1, next: &sequence{block: 0xffffffff, count: 6}}}},
{&sequence{block: 0xffffffff, count: 1, next: &sequence{block: 0xE0000000, count: 1, next: &sequence{block: 0xffffffff, count: 6}}}, 4, 3,
&sequence{block: 0xffffffff, count: 1, next: &sequence{block: 0xF0000000, count: 1, next: &sequence{block: 0xffffffff, count: 6}}}},
{&sequence{block: 0xffffffff, count: 1, next: &sequence{block: 0xF0000000, count: 1, next: &sequence{block: 0xffffffff, count: 6}}}, 4, 4,
&sequence{block: 0xffffffff, count: 1, next: &sequence{block: 0xF8000000, count: 1, next: &sequence{block: 0xffffffff, count: 6}}}},
{&sequence{block: 0xffffffff, count: 1, next: &sequence{block: 0xF8000000, count: 1, next: &sequence{block: 0xffffffff, count: 6}}}, 4, 5,
&sequence{block: 0xffffffff, count: 1, next: &sequence{block: 0xFC000000, count: 1, next: &sequence{block: 0xffffffff, count: 6}}}},
{&sequence{block: 0xffffffff, count: 1, next: &sequence{block: 0xFC000000, count: 1, next: &sequence{block: 0xffffffff, count: 6}}}, 4, 6,
&sequence{block: 0xffffffff, count: 1, next: &sequence{block: 0xFE000000, count: 1, next: &sequence{block: 0xffffffff, count: 6}}}},
{&sequence{block: 0xffffffff, count: 1, next: &sequence{block: 0xFE000000, count: 1, next: &sequence{block: 0xffffffff, count: 6}}}, 4, 7,
&sequence{block: 0xffffffff, count: 1, next: &sequence{block: 0xFF000000, count: 1, next: &sequence{block: 0xffffffff, count: 6}}}},
// fill in 8 addresses starting from address 40
{&sequence{block: 0xffffffff, count: 1, next: &sequence{block: 0xFF000000, count: 1, next: &sequence{block: 0xffffffff, count: 6}}}, 5, 0,
&sequence{block: 0xffffffff, count: 1, next: &sequence{block: 0xFF800000, count: 1, next: &sequence{block: 0xffffffff, count: 6}}}},
{&sequence{block: 0xffffffff, count: 1, next: &sequence{block: 0xFF800000, count: 1, next: &sequence{block: 0xffffffff, count: 6}}}, 5, 1,
&sequence{block: 0xffffffff, count: 1, next: &sequence{block: 0xFFC00000, count: 1, next: &sequence{block: 0xffffffff, count: 6}}}},
{&sequence{block: 0xffffffff, count: 1, next: &sequence{block: 0xFFC00000, count: 1, next: &sequence{block: 0xffffffff, count: 6}}}, 5, 2,
&sequence{block: 0xffffffff, count: 1, next: &sequence{block: 0xFFE00000, count: 1, next: &sequence{block: 0xffffffff, count: 6}}}},
{&sequence{block: 0xffffffff, count: 1, next: &sequence{block: 0xFFE00000, count: 1, next: &sequence{block: 0xffffffff, count: 6}}}, 5, 3,
&sequence{block: 0xffffffff, count: 1, next: &sequence{block: 0xFFF00000, count: 1, next: &sequence{block: 0xffffffff, count: 6}}}},
{&sequence{block: 0xffffffff, count: 1, next: &sequence{block: 0xFFF00000, count: 1, next: &sequence{block: 0xffffffff, count: 6}}}, 5, 4,
&sequence{block: 0xffffffff, count: 1, next: &sequence{block: 0xFFF80000, count: 1, next: &sequence{block: 0xffffffff, count: 6}}}},
{&sequence{block: 0xffffffff, count: 1, next: &sequence{block: 0xFFF80000, count: 1, next: &sequence{block: 0xffffffff, count: 6}}}, 5, 5,
&sequence{block: 0xffffffff, count: 1, next: &sequence{block: 0xFFFC0000, count: 1, next: &sequence{block: 0xffffffff, count: 6}}}},
{&sequence{block: 0xffffffff, count: 1, next: &sequence{block: 0xFFFC0000, count: 1, next: &sequence{block: 0xffffffff, count: 6}}}, 5, 6,
&sequence{block: 0xffffffff, count: 1, next: &sequence{block: 0xFFFE0000, count: 1, next: &sequence{block: 0xffffffff, count: 6}}}},
{&sequence{block: 0xffffffff, count: 1, next: &sequence{block: 0xFFFE0000, count: 1, next: &sequence{block: 0xffffffff, count: 6}}}, 5, 7,
&sequence{block: 0xffffffff, count: 1, next: &sequence{block: 0xFFFF0000, count: 1, next: &sequence{block: 0xffffffff, count: 6}}}},
// Insert new sequence
{&sequence{block: 0xffffffff, count: 2, next: &sequence{block: 0x0, count: 6}}, 8, 0,
&sequence{block: 0xffffffff, count: 2, next: &sequence{block: 0x80000000, count: 1, next: &sequence{block: 0x0, count: 5}}}},
{&sequence{block: 0xffffffff, count: 2, next: &sequence{block: 0x80000000, count: 1, next: &sequence{block: 0x0, count: 5}}}, 8, 1,
&sequence{block: 0xffffffff, count: 2, next: &sequence{block: 0xC0000000, count: 1, next: &sequence{block: 0x0, count: 5}}}},
// Merge affected with next
{&sequence{block: 0xffffffff, count: 7, next: &sequence{block: 0xfffffffe, count: 2, next: &sequence{block: 0xffffffff, count: 1}}}, 31, 7,
&sequence{block: 0xffffffff, count: 8, next: &sequence{block: 0xfffffffe, count: 1, next: &sequence{block: 0xffffffff, count: 1}}}},
{&sequence{block: 0xffffffff, count: 1, next: &sequence{block: 0xfffffffc, count: 1, next: &sequence{block: 0xfffffffe, count: 6}}}, 7, 6,
&sequence{block: 0xffffffff, count: 1, next: &sequence{block: 0xfffffffe, count: 7}}},
// Merge affected with next and next.next
{&sequence{block: 0xffffffff, count: 7, next: &sequence{block: 0xfffffffe, count: 1, next: &sequence{block: 0xffffffff, count: 1}}}, 31, 7,
&sequence{block: 0xffffffff, count: 9}},
{&sequence{block: 0xffffffff, count: 7, next: &sequence{block: 0xfffffffe, count: 1}}, 31, 7,
&sequence{block: 0xffffffff, count: 8}},
// Merge affected with previous and next
{&sequence{block: 0xffffffff, count: 7, next: &sequence{block: 0xfffffffe, count: 1, next: &sequence{block: 0xffffffff, count: 1}}}, 31, 7,
&sequence{block: 0xffffffff, count: 9}},
// Redundant push: No change
{&sequence{block: 0xffff0000, count: 1}, 0, 0, &sequence{block: 0xffff0000, count: 1}},
{&sequence{block: 0xffff0000, count: 7}, 25, 7, &sequence{block: 0xffff0000, count: 7}},
{&sequence{block: 0xffffffff, count: 7, next: &sequence{block: 0xfffffffe, count: 1, next: &sequence{block: 0xffffffff, count: 1}}}, 7, 7,
&sequence{block: 0xffffffff, count: 7, next: &sequence{block: 0xfffffffe, count: 1, next: &sequence{block: 0xffffffff, count: 1}}}},
// Set last bit
{&sequence{block: 0x0, count: 8}, 31, 7, &sequence{block: 0x0, count: 7, next: &sequence{block: 0x1, count: 1}}},
// Set bit in a middle sequence in the first block, first bit
{&sequence{block: 0x40000000, count: 1, next: &sequence{block: 0x0, count: 6, next: &sequence{block: 0x1, count: 1}}}, 4, 0,
&sequence{block: 0x40000000, count: 1, next: &sequence{block: 0x80000000, count: 1, next: &sequence{block: 0x0, count: 5,
next: &sequence{block: 0x1, count: 1}}}}},
// Set bit in a middle sequence in the first block, first bit (merge involved)
{&sequence{block: 0x80000000, count: 1, next: &sequence{block: 0x0, count: 6, next: &sequence{block: 0x1, count: 1}}}, 4, 0,
&sequence{block: 0x80000000, count: 2, next: &sequence{block: 0x0, count: 5, next: &sequence{block: 0x1, count: 1}}}},
// Set bit in a middle sequence in the first block, last bit
{&sequence{block: 0x80000000, count: 1, next: &sequence{block: 0x0, count: 6, next: &sequence{block: 0x1, count: 1}}}, 4, 31,
&sequence{block: 0x80000000, count: 1, next: &sequence{block: 0x1, count: 1, next: &sequence{block: 0x0, count: 5,
next: &sequence{block: 0x1, count: 1}}}}},
// Set bit in a middle sequence in the first block, middle bit
{&sequence{block: 0x80000000, count: 1, next: &sequence{block: 0x0, count: 6, next: &sequence{block: 0x1, count: 1}}}, 4, 16,
&sequence{block: 0x80000000, count: 1, next: &sequence{block: 0x8000, count: 1, next: &sequence{block: 0x0, count: 5,
next: &sequence{block: 0x1, count: 1}}}}},
// Set bit in a middle sequence in a middle block, first bit
{&sequence{block: 0x80000000, count: 1, next: &sequence{block: 0x0, count: 6, next: &sequence{block: 0x1, count: 1}}}, 16, 0,
&sequence{block: 0x80000000, count: 1, next: &sequence{block: 0x0, count: 3, next: &sequence{block: 0x80000000, count: 1,
next: &sequence{block: 0x0, count: 2, next: &sequence{block: 0x1, count: 1}}}}}},
// Set bit in a middle sequence in a middle block, last bit
{&sequence{block: 0x80000000, count: 1, next: &sequence{block: 0x0, count: 6, next: &sequence{block: 0x1, count: 1}}}, 16, 31,
&sequence{block: 0x80000000, count: 1, next: &sequence{block: 0x0, count: 3, next: &sequence{block: 0x1, count: 1,
next: &sequence{block: 0x0, count: 2, next: &sequence{block: 0x1, count: 1}}}}}},
// Set bit in a middle sequence in a middle block, middle bit
{&sequence{block: 0x80000000, count: 1, next: &sequence{block: 0x0, count: 6, next: &sequence{block: 0x1, count: 1}}}, 16, 15,
&sequence{block: 0x80000000, count: 1, next: &sequence{block: 0x0, count: 3, next: &sequence{block: 0x10000, count: 1,
next: &sequence{block: 0x0, count: 2, next: &sequence{block: 0x1, count: 1}}}}}},
// Set bit in a middle sequence in the last block, first bit
{&sequence{block: 0x80000000, count: 1, next: &sequence{block: 0x0, count: 6, next: &sequence{block: 0x1, count: 1}}}, 24, 0,
&sequence{block: 0x80000000, count: 1, next: &sequence{block: 0x0, count: 5, next: &sequence{block: 0x80000000, count: 1,
next: &sequence{block: 0x1, count: 1}}}}},
// Set bit in a middle sequence in the last block, last bit
{&sequence{block: 0x80000000, count: 1, next: &sequence{block: 0x0, count: 6, next: &sequence{block: 0x4, count: 1}}}, 24, 31,
&sequence{block: 0x80000000, count: 1, next: &sequence{block: 0x0, count: 5, next: &sequence{block: 0x1, count: 1,
next: &sequence{block: 0x4, count: 1}}}}},
// Set bit in a middle sequence in the last block, last bit (merge involved)
{&sequence{block: 0x80000000, count: 1, next: &sequence{block: 0x0, count: 6, next: &sequence{block: 0x1, count: 1}}}, 24, 31,
&sequence{block: 0x80000000, count: 1, next: &sequence{block: 0x0, count: 5, next: &sequence{block: 0x1, count: 2}}}},
// Set bit in a middle sequence in the last block, middle bit
{&sequence{block: 0x80000000, count: 1, next: &sequence{block: 0x0, count: 6, next: &sequence{block: 0x1, count: 1}}}, 24, 16,
&sequence{block: 0x80000000, count: 1, next: &sequence{block: 0x0, count: 5, next: &sequence{block: 0x8000, count: 1,
next: &sequence{block: 0x1, count: 1}}}}},
}
for n, i := range input {
mask := pushReservation(i.bytePos, i.bitPos, i.mask, false)
if !mask.equal(i.newMask) {
t.Fatalf("Error in (%d) pushReservation():\n%s + (%d,%d):\nExp: %s\nGot: %s,",
n, i.mask.toString(), i.bytePos, i.bitPos, i.newMask.toString(), mask.toString())
}
}
}
func TestSerializeDeserialize(t *testing.T) {
s := getTestSequence()
data, err := s.toByteArray()
if err != nil {
t.Fatal(err)
}
r := &sequence{}
err = r.fromByteArray(data)
if err != nil {
t.Fatal(err)
}
if !s.equal(r) {
t.Fatalf("Sequences are different: \n%v\n%v", s, r)
}
}
func getTestSequence() *sequence {
// Returns a custom sequence of 1024 * 32 bits
return &sequence{
block: 0xFFFFFFFF,
count: 100,
next: &sequence{
block: 0xFFFFFFFE,
count: 1,
next: &sequence{
block: 0xFF000000,
count: 10,
next: &sequence{
block: 0xFFFFFFFF,
count: 50,
next: &sequence{
block: 0xFFFFFFFC,
count: 1,
next: &sequence{
block: 0xFF800000,
count: 1,
next: &sequence{
block: 0xFFFFFFFF,
count: 87,
next: &sequence{
block: 0x0,
count: 150,
next: &sequence{
block: 0xFFFFFFFF,
count: 200,
next: &sequence{
block: 0x0000FFFF,
count: 1,
next: &sequence{
block: 0x0,
count: 399,
next: &sequence{
block: 0xFFFFFFFF,
count: 23,
next: &sequence{
block: 0x1,
count: 1,
},
},
},
},
},
},
},
},
},
},
},
},
}
}
func TestSet(t *testing.T) {
hnd := New(1024 * 32)
hnd.head = getTestSequence()
firstAv := uint64(32*100 + 31)
last := uint64(1024*32 - 1)
if hnd.IsSet(100000) {
t.Fatal("IsSet() returned wrong result")
}
if !hnd.IsSet(0) {
t.Fatal("IsSet() returned wrong result")
}
if hnd.IsSet(firstAv) {
t.Fatal("IsSet() returned wrong result")
}
if !hnd.IsSet(last) {
t.Fatal("IsSet() returned wrong result")
}
if err := hnd.Set(0); err == nil {
t.Fatal("Expected failure, but succeeded")
}
os, err := hnd.SetAny(false)
if err != nil {
t.Fatalf("Unexpected failure: %v", err)
}
if os != firstAv {
t.Fatalf("SetAny returned unexpected ordinal. Expected %d. Got %d.", firstAv, os)
}
if !hnd.IsSet(firstAv) {
t.Fatal("IsSet() returned wrong result")
}
if err := hnd.Unset(firstAv); err != nil {
t.Fatalf("Unexpected failure: %v", err)
}
if hnd.IsSet(firstAv) {
t.Fatal("IsSet() returned wrong result")
}
if err := hnd.Set(firstAv); err != nil {
t.Fatalf("Unexpected failure: %v", err)
}
if err := hnd.Set(last); err == nil {
t.Fatal("Expected failure, but succeeded")
}
}
func TestSetUnset(t *testing.T) {
numBits := uint64(32 * blockLen)
hnd := New(numBits)
if err := hnd.Set(uint64(32 * blockLen)); err == nil {
t.Fatal("Expected failure, but succeeded")
}
if err := hnd.Unset(uint64(32 * blockLen)); err == nil {
t.Fatal("Expected failure, but succeeded")
}
// set and unset all one by one
for hnd.Unselected() > 0 {
if _, err := hnd.SetAny(false); err != nil {
t.Fatal(err)
}
}
if _, err := hnd.SetAny(false); err != ErrNoBitAvailable {
t.Fatal("Expected error. Got success")
}
if _, err := hnd.SetAnyInRange(10, 20, false); err != ErrNoBitAvailable {
t.Fatal("Expected error. Got success")
}
if err := hnd.Set(50); err != ErrBitAllocated {
t.Fatalf("Expected error. Got %v: %s", err, hnd)
}
i := uint64(0)
for hnd.Unselected() < numBits {
if err := hnd.Unset(i); err != nil {
t.Fatal(err)
}
i++
}
}
func TestOffsetSetUnset(t *testing.T) {
numBits := uint64(32 * blockLen)
hnd := New(numBits)
// set and unset all one by one
for hnd.Unselected() > 0 {
if _, err := hnd.SetAny(false); err != nil {
t.Fatal(err)
}
}
if _, err := hnd.SetAny(false); err != ErrNoBitAvailable {
t.Fatal("Expected error. Got success")
}
if _, err := hnd.SetAnyInRange(10, 20, false); err != ErrNoBitAvailable {
t.Fatal("Expected error. Got success")
}
if err := hnd.Unset(288); err != nil {
t.Fatal(err)
}
//At this point sequence is (0xffffffff, 9)->(0x7fffffff, 1)->(0xffffffff, 22)->end
o, err := hnd.SetAnyInRange(32, 500, false)
if err != nil {
t.Fatal(err)
}
if o != 288 {
t.Fatalf("Expected ordinal not received, Received:%d", o)
}
}
func TestSetInRange(t *testing.T) {
numBits := uint64(1024 * blockLen)
hnd := New(numBits)
hnd.head = getTestSequence()
firstAv := uint64(100*blockLen + blockLen - 1)
if o, err := hnd.SetAnyInRange(4, 3, false); err == nil {
t.Fatalf("Expected failure. Got success with ordinal:%d", o)
}
if o, err := hnd.SetAnyInRange(0, numBits, false); err == nil {
t.Fatalf("Expected failure. Got success with ordinal:%d", o)
}
o, err := hnd.SetAnyInRange(100*uint64(blockLen), 101*uint64(blockLen), false)
if err != nil {
t.Fatalf("Unexpected failure: (%d, %v)", o, err)
}
if o != firstAv {
t.Fatalf("Unexpected ordinal: %d", o)
}
if o, err := hnd.SetAnyInRange(0, uint64(blockLen), false); err == nil {
t.Fatalf("Expected failure. Got success with ordinal:%d", o)
}
if o, err := hnd.SetAnyInRange(0, firstAv-1, false); err == nil {
t.Fatalf("Expected failure. Got success with ordinal:%d", o)
}
if o, err := hnd.SetAnyInRange(111*uint64(blockLen), 161*uint64(blockLen), false); err == nil {
t.Fatalf("Expected failure. Got success with ordinal:%d", o)
}
o, err = hnd.SetAnyInRange(161*uint64(blockLen), 162*uint64(blockLen), false)
if err != nil {
t.Fatal(err)
}
if o != 161*uint64(blockLen)+30 {
t.Fatalf("Unexpected ordinal: %d", o)
}
o, err = hnd.SetAnyInRange(161*uint64(blockLen), 162*uint64(blockLen), false)
if err != nil {
t.Fatal(err)
}
if o != 161*uint64(blockLen)+31 {
t.Fatalf("Unexpected ordinal: %d", o)
}
o, err = hnd.SetAnyInRange(161*uint64(blockLen), 162*uint64(blockLen), false)
if err == nil {
t.Fatalf("Expected failure. Got success with ordinal:%d", o)
}
if _, err := hnd.SetAnyInRange(0, numBits-1, false); err != nil {
t.Fatalf("Unexpected failure: %v", err)
}
// set one bit using the set range with 1 bit size range
if _, err := hnd.SetAnyInRange(uint64(163*blockLen-1), uint64(163*blockLen-1), false); err != nil {
t.Fatal(err)
}
// create a non multiple of 32 mask
hnd = New(30)
// set all bit in the first range
for hnd.Unselected() > 22 {
if o, err := hnd.SetAnyInRange(0, 7, false); err != nil {
t.Fatalf("Unexpected failure: (%d, %v)", o, err)
}
}
// try one more set, which should fail
o, err = hnd.SetAnyInRange(0, 7, false)
if err == nil {
t.Fatalf("Expected failure. Got success with ordinal:%d", o)
}
if err != ErrNoBitAvailable {
t.Fatalf("Unexpected error: %v", err)
}
// set all bit in a second range
for hnd.Unselected() > 14 {
if o, err := hnd.SetAnyInRange(8, 15, false); err != nil {
t.Fatalf("Unexpected failure: (%d, %v)", o, err)
}
}
// try one more set, which should fail
o, err = hnd.SetAnyInRange(0, 15, false)
if err == nil {
t.Fatalf("Expected failure. Got success with ordinal:%d", o)
}
if err != ErrNoBitAvailable {
t.Fatalf("Unexpected error: %v", err)
}
// set all bit in a range which includes the last bit
for hnd.Unselected() > 12 {
if o, err := hnd.SetAnyInRange(28, 29, false); err != nil {
t.Fatalf("Unexpected failure: (%d, %v)", o, err)
}
}
o, err = hnd.SetAnyInRange(28, 29, false)
if err == nil {
t.Fatalf("Expected failure. Got success with ordinal:%d", o)
}
if err != ErrNoBitAvailable {
t.Fatalf("Unexpected error: %v", err)
}
}
// This one tests an allocation pattern which unveiled an issue in pushReservation
// Specifically a failure in detecting when we are in the (B) case (the bit to set
// belongs to the last block of the current sequence). Because of a bug, code
// was assuming the bit belonged to a block in the middle of the current sequence.
// Which in turn caused an incorrect allocation when requesting a bit which is not
// in the first or last sequence block.
func TestSetAnyInRange(t *testing.T) {
numBits := uint64(8 * blockLen)
hnd := New(numBits)
if err := hnd.Set(0); err != nil {
t.Fatal(err)
}
if err := hnd.Set(255); err != nil {
t.Fatal(err)
}
o, err := hnd.SetAnyInRange(128, 255, false)
if err != nil {
t.Fatal(err)
}
if o != 128 {
t.Fatalf("Unexpected ordinal: %d", o)
}
o, err = hnd.SetAnyInRange(128, 255, false)
if err != nil {
t.Fatal(err)
}
if o != 129 {
t.Fatalf("Unexpected ordinal: %d", o)
}
o, err = hnd.SetAnyInRange(246, 255, false)
if err != nil {
t.Fatal(err)
}
if o != 246 {
t.Fatalf("Unexpected ordinal: %d", o)
}
o, err = hnd.SetAnyInRange(246, 255, false)
if err != nil {
t.Fatal(err)
}
if o != 247 {
t.Fatalf("Unexpected ordinal: %d", o)
}
}
func TestMethods(t *testing.T) {
numBits := uint64(256 * blockLen)
hnd := New(numBits)
if hnd.Bits() != numBits {
t.Fatalf("Unexpected bit number: %d", hnd.Bits())
}
if hnd.Unselected() != numBits {
t.Fatalf("Unexpected bit number: %d", hnd.Unselected())
}
exp := "(0x0, 256)->end"
if hnd.head.toString() != exp {
t.Fatalf("Unexpected sequence string: %s", hnd.head.toString())
}
for i := 0; i < 192; i++ {
_, err := hnd.SetAny(false)
if err != nil {
t.Fatal(err)
}
}
exp = "(0xffffffff, 6)->(0x0, 250)->end"
if hnd.head.toString() != exp {
t.Fatalf("Unexpected sequence string: %s", hnd.head.toString())
}
}
func TestRandomAllocateDeallocate(t *testing.T) {
numBits := int(16 * blockLen)
hnd := New(uint64(numBits))
seed := time.Now().Unix()
rng := rand.New(rand.NewSource(seed))
// Allocate all bits using a random pattern
pattern := rng.Perm(numBits)
for _, bit := range pattern {
err := hnd.Set(uint64(bit))
if err != nil {
t.Fatalf("Unexpected failure on allocation of %d: %v.\nSeed: %d.\n%s", bit, err, seed, hnd)
}
}
if hnd.Unselected() != 0 {
t.Fatalf("Expected full sequence. Instead found %d free bits. Seed: %d.\n%s", hnd.unselected, seed, hnd)
}
if hnd.head.toString() != "(0xffffffff, 16)->end" {
t.Fatalf("Unexpected db: %s", hnd.head.toString())
}
// Deallocate all bits using a random pattern
pattern = rng.Perm(numBits)
for _, bit := range pattern {
err := hnd.Unset(uint64(bit))
if err != nil {
t.Fatalf("Unexpected failure on deallocation of %d: %v.\nSeed: %d.\n%s", bit, err, seed, hnd)
}
}
if hnd.Unselected() != uint64(numBits) {
t.Fatalf("Expected full sequence. Instead found %d free bits. Seed: %d.\n%s", hnd.unselected, seed, hnd)
}
if hnd.head.toString() != "(0x0, 16)->end" {
t.Fatalf("Unexpected db: %s", hnd.head.toString())
}
}
func TestAllocateRandomDeallocate(t *testing.T) {
numBlocks := uint32(8)
numBits := int(numBlocks * blockLen)
hnd := New(uint64(numBits))
expected := &sequence{block: 0xffffffff, count: uint64(numBlocks / 2), next: &sequence{block: 0x0, count: uint64(numBlocks / 2)}}
// Allocate first half of the bits
for i := 0; i < numBits/2; i++ {
_, err := hnd.SetAny(false)
if err != nil {
t.Fatalf("Unexpected failure on allocation %d: %v\n%s", i, err, hnd)
}
}
if hnd.Unselected() != uint64(numBits/2) {
t.Fatalf("Expected full sequence. Instead found %d free bits. %s", hnd.unselected, hnd)
}
if !hnd.head.equal(expected) {
t.Fatalf("Unexpected sequence. Got:\n%s", hnd)
}
seed := time.Now().Unix()
rng := rand.New(rand.NewSource(seed))
// Deallocate half of the allocated bits following a random pattern
pattern := rng.Perm(numBits / 2)
for i := 0; i < numBits/4; i++ {
bit := pattern[i]
err := hnd.Unset(uint64(bit))
if err != nil {
t.Fatalf("Unexpected failure on deallocation of %d: %v.\nSeed: %d.\n%s", bit, err, seed, hnd)
}
}
if hnd.Unselected() != uint64(3*numBits/4) {
t.Fatalf("Expected full sequence. Instead found %d free bits.\nSeed: %d.\n%s", hnd.unselected, seed, hnd)
}
// Request a quarter of bits
for i := 0; i < numBits/4; i++ {
_, err := hnd.SetAny(false)
if err != nil {
t.Fatalf("Unexpected failure on allocation %d: %v\nSeed: %d\n%s", i, err, seed, hnd)
}
}
if hnd.Unselected() != uint64(numBits/2) {
t.Fatalf("Expected half sequence. Instead found %d free bits.\nSeed: %d\n%s", hnd.unselected, seed, hnd)
}
if !hnd.head.equal(expected) {
t.Fatalf("Unexpected sequence. Got:\n%s", hnd)
}
}
func TestAllocateRandomDeallocateSerialize(t *testing.T) {
numBlocks := uint32(8)
numBits := int(numBlocks * blockLen)
hnd := New(uint64(numBits))
expected := &sequence{block: 0xffffffff, count: uint64(numBlocks / 2), next: &sequence{block: 0x0, count: uint64(numBlocks / 2)}}
// Allocate first half of the bits
for i := 0; i < numBits/2; i++ {
_, err := hnd.SetAny(true)
if err != nil {
t.Fatalf("Unexpected failure on allocation %d: %v\n%s", i, err, hnd)
}
}
if hnd.Unselected() != uint64(numBits/2) {
t.Fatalf("Expected full sequence. Instead found %d free bits. %s", hnd.unselected, hnd)
}
if !hnd.head.equal(expected) {
t.Fatalf("Unexpected sequence. Got:\n%s", hnd)
}
seed := time.Now().Unix()
rng := rand.New(rand.NewSource(seed))
// Deallocate half of the allocated bits following a random pattern
pattern := rng.Perm(numBits / 2)
for i := 0; i < numBits/4; i++ {
bit := pattern[i]
err := hnd.Unset(uint64(bit))
if err != nil {
t.Fatalf("Unexpected failure on deallocation of %d: %v.\nSeed: %d.\n%s", bit, err, seed, hnd)
}
}
if hnd.Unselected() != uint64(3*numBits/4) {
t.Fatalf("Expected full sequence. Instead found %d free bits.\nSeed: %d.\n%s", hnd.unselected, seed, hnd)
}
// Request a quarter of bits
for i := 0; i < numBits/4; i++ {
_, err := hnd.SetAny(true)
if err != nil {
t.Fatalf("Unexpected failure on allocation %d: %v\nSeed: %d\n%s", i, err, seed, hnd)
}
}
if hnd.Unselected() != uint64(numBits/2) {
t.Fatalf("Expected half sequence. Instead found %d free bits.\nSeed: %d\n%s", hnd.unselected, seed, hnd)
}
}
func testSetRollover(t *testing.T, serial bool) {
numBlocks := uint32(8)
numBits := int(numBlocks * blockLen)
hnd := New(uint64(numBits))
// Allocate first half of the bits
for i := 0; i < numBits/2; i++ {
_, err := hnd.SetAny(serial)
if err != nil {
t.Fatalf("Unexpected failure on allocation %d: %v\n%s", i, err, hnd)
}
}
if hnd.Unselected() != uint64(numBits/2) {
t.Fatalf("Expected full sequence. Instead found %d free bits. %s", hnd.unselected, hnd)
}
seed := time.Now().Unix()
rng := rand.New(rand.NewSource(seed))
// Deallocate half of the allocated bits following a random pattern
pattern := rng.Perm(numBits / 2)
for i := 0; i < numBits/4; i++ {
bit := pattern[i]
err := hnd.Unset(uint64(bit))
if err != nil {
t.Fatalf("Unexpected failure on deallocation of %d: %v.\nSeed: %d.\n%s", bit, err, seed, hnd)
}
}
if hnd.Unselected() != uint64(3*numBits/4) {
t.Fatalf("Unexpected free bits: found %d free bits.\nSeed: %d.\n%s", hnd.unselected, seed, hnd)
}
//request to allocate for remaining half of the bits
for i := 0; i < numBits/2; i++ {
_, err := hnd.SetAny(serial)
if err != nil {
t.Fatalf("Unexpected failure on allocation %d: %v\nSeed: %d\n%s", i, err, seed, hnd)
}
}
//At this point all the bits must be allocated except the randomly unallocated bits
//which were unallocated in the first half of the bit sequence
if hnd.Unselected() != uint64(numBits/4) {
t.Fatalf("Unexpected number of unselected bits %d, Expected %d", hnd.Unselected(), numBits/4)
}
for i := 0; i < numBits/4; i++ {
_, err := hnd.SetAny(serial)
if err != nil {
t.Fatalf("Unexpected failure on allocation %d: %v\nSeed: %d\n%s", i, err, seed, hnd)
}
}
//Now requesting to allocate the unallocated random bits (qurter of the number of bits) should
//leave no more bits that can be allocated.
if hnd.Unselected() != 0 {
t.Fatalf("Unexpected number of unselected bits %d, Expected %d", hnd.Unselected(), 0)
}
}
func TestSetRollover(t *testing.T) {
testSetRollover(t, false)
}
func TestSetRolloverSerial(t *testing.T) {
testSetRollover(t, true)
}
func TestGetFirstAvailableFromCurrent(t *testing.T) {
input := []struct {
mask *sequence
bytePos uint64
bitPos uint64
start uint64
curr uint64
end uint64
}{
{&sequence{block: 0xffffffff, count: 2048}, invalidPos, invalidPos, 0, 0, 65536},
{&sequence{block: 0x0, count: 8}, 0, 0, 0, 0, 256},
{&sequence{block: 0x80000000, count: 8}, 1, 0, 0, 8, 256},
{&sequence{block: 0xC0000000, count: 8}, 0, 2, 0, 2, 256},
{&sequence{block: 0xE0000000, count: 8}, 0, 3, 0, 0, 256},
{&sequence{block: 0xFFFB1FFF, count: 8}, 2, 0, 14, 0, 256},
{&sequence{block: 0xFFFFFFFE, count: 8}, 3, 7, 0, 0, 256},
{&sequence{block: 0xffffffff, count: 1, next: &sequence{block: 0x00000000, count: 1, next: &sequence{block: 0xffffffff, count: 14}}}, 4, 0, 0, 32, 512},
{&sequence{block: 0xfffeffff, count: 1, next: &sequence{block: 0xffffffff, count: 15}}, 1, 7, 0, 16, 512},
{&sequence{block: 0xfffeffff, count: 15, next: &sequence{block: 0xffffffff, count: 1}}, 5, 7, 0, 16, 512},
{&sequence{block: 0xfffeffff, count: 15, next: &sequence{block: 0xffffffff, count: 1}}, 9, 7, 0, 48, 512},
{&sequence{block: 0xffffffff, count: 2, next: &sequence{block: 0xffffffef, count: 14}}, 19, 3, 0, 124, 512},
{&sequence{block: 0xfffeffff, count: 15, next: &sequence{block: 0x0fffffff, count: 1}}, 60, 0, 0, 480, 512},
{&sequence{block: 0xffffffff, count: 1, next: &sequence{block: 0xfffeffff, count: 14, next: &sequence{block: 0xffffffff, count: 1}}}, 17, 7, 0, 124, 512},
{&sequence{block: 0xfffffffb, count: 1, next: &sequence{block: 0xffffffff, count: 14, next: &sequence{block: 0xffffffff, count: 1}}}, 3, 5, 0, 124, 512},
{&sequence{block: 0xfffffffb, count: 1, next: &sequence{block: 0xfffeffff, count: 14, next: &sequence{block: 0xffffffff, count: 1}}}, 13, 7, 0, 80, 512},
}
for n, i := range input {
bytePos, bitPos, _ := getAvailableFromCurrent(i.mask, i.start, i.curr, i.end)
if bytePos != i.bytePos || bitPos != i.bitPos {
t.Fatalf("Error in (%d) getFirstAvailable(). Expected (%d, %d). Got (%d, %d)", n, i.bytePos, i.bitPos, bytePos, bitPos)
}
}
}
func TestMarshalJSON(t *testing.T) {
expected := []byte("hello libnetwork")
hnd := New(uint64(len(expected) * 8))
for i, c := range expected {
for j := 0; j < 8; j++ {
if c&(1<<j) == 0 {
continue
}
if err := hnd.Set(uint64(i*8 + j)); err != nil {
t.Fatal(err)
}
}
}
hstr := hnd.String()
t.Log(hstr)
marshaled, err := hnd.MarshalJSON()
if err != nil {
t.Fatalf("MarshalJSON() err = %v", err)
}
t.Logf("%s", marshaled)
// Serializations of hnd as would be marshaled by versions of the code
// found in the wild. We need to support unmarshaling old versions to
// maintain backwards compatibility with sequences persisted on disk.
const (
goldenV0 = `"AAAAAAAAAIAAAAAAAAAAPRamNjYAAAAAAAAAAfYENpYAAAAAAAAAAUZ2pi4AAAAAAAAAAe72TtYAAAAAAAAAAQ=="`
)
if string(marshaled) != goldenV0 {
t.Errorf("MarshalJSON() output differs from golden. Please add a new golden case to this test.")
}
for _, tt := range []struct {
name string
data []byte
}{
{name: "Live", data: marshaled},
{name: "Golden-v0", data: []byte(goldenV0)},
} {
tt := tt
t.Run("UnmarshalJSON="+tt.name, func(t *testing.T) {
hnd2 := New(0)
if err := hnd2.UnmarshalJSON(tt.data); err != nil {
t.Errorf("UnmarshalJSON() err = %v", err)
}
h2str := hnd2.String()
t.Log(h2str)
if hstr != h2str {
t.Errorf("Unmarshaled a different bitmap: want %q, got %q", hstr, h2str)
}
})
}
}
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