You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
166 lines
3.4 KiB
166 lines
3.4 KiB
package common
|
|
|
|
import (
|
|
"bytes"
|
|
"testing"
|
|
)
|
|
|
|
func randBitArray(bits int) (*BitArray, []byte) {
|
|
src := RandBytes((bits + 7) / 8)
|
|
bA := NewBitArray(bits)
|
|
for i := 0; i < len(src); i++ {
|
|
for j := 0; j < 8; j++ {
|
|
if i*8+j >= bits {
|
|
return bA, src
|
|
}
|
|
setBit := src[i]&(1<<uint(j)) > 0
|
|
bA.SetIndex(i*8+j, setBit)
|
|
}
|
|
}
|
|
return bA, src
|
|
}
|
|
|
|
func TestAnd(t *testing.T) {
|
|
|
|
bA1, _ := randBitArray(51)
|
|
bA2, _ := randBitArray(31)
|
|
bA3 := bA1.And(bA2)
|
|
|
|
if bA3.Bits != 31 {
|
|
t.Error("Expected min bits", bA3.Bits)
|
|
}
|
|
if len(bA3.Elems) != len(bA2.Elems) {
|
|
t.Error("Expected min elems length")
|
|
}
|
|
for i := 0; i < bA3.Bits; i++ {
|
|
expected := bA1.GetIndex(i) && bA2.GetIndex(i)
|
|
if bA3.GetIndex(i) != expected {
|
|
t.Error("Wrong bit from bA3", i, bA1.GetIndex(i), bA2.GetIndex(i), bA3.GetIndex(i))
|
|
}
|
|
}
|
|
}
|
|
|
|
func TestOr(t *testing.T) {
|
|
|
|
bA1, _ := randBitArray(51)
|
|
bA2, _ := randBitArray(31)
|
|
bA3 := bA1.Or(bA2)
|
|
|
|
if bA3.Bits != 51 {
|
|
t.Error("Expected max bits")
|
|
}
|
|
if len(bA3.Elems) != len(bA1.Elems) {
|
|
t.Error("Expected max elems length")
|
|
}
|
|
for i := 0; i < bA3.Bits; i++ {
|
|
expected := bA1.GetIndex(i) || bA2.GetIndex(i)
|
|
if bA3.GetIndex(i) != expected {
|
|
t.Error("Wrong bit from bA3", i, bA1.GetIndex(i), bA2.GetIndex(i), bA3.GetIndex(i))
|
|
}
|
|
}
|
|
}
|
|
|
|
func TestSub1(t *testing.T) {
|
|
|
|
bA1, _ := randBitArray(31)
|
|
bA2, _ := randBitArray(51)
|
|
bA3 := bA1.Sub(bA2)
|
|
|
|
if bA3.Bits != bA1.Bits {
|
|
t.Error("Expected bA1 bits")
|
|
}
|
|
if len(bA3.Elems) != len(bA1.Elems) {
|
|
t.Error("Expected bA1 elems length")
|
|
}
|
|
for i := 0; i < bA3.Bits; i++ {
|
|
expected := bA1.GetIndex(i)
|
|
if bA2.GetIndex(i) {
|
|
expected = false
|
|
}
|
|
if bA3.GetIndex(i) != expected {
|
|
t.Error("Wrong bit from bA3", i, bA1.GetIndex(i), bA2.GetIndex(i), bA3.GetIndex(i))
|
|
}
|
|
}
|
|
}
|
|
|
|
func TestSub2(t *testing.T) {
|
|
|
|
bA1, _ := randBitArray(51)
|
|
bA2, _ := randBitArray(31)
|
|
bA3 := bA1.Sub(bA2)
|
|
|
|
if bA3.Bits != bA1.Bits {
|
|
t.Error("Expected bA1 bits")
|
|
}
|
|
if len(bA3.Elems) != len(bA1.Elems) {
|
|
t.Error("Expected bA1 elems length")
|
|
}
|
|
for i := 0; i < bA3.Bits; i++ {
|
|
expected := bA1.GetIndex(i)
|
|
if i < bA2.Bits && bA2.GetIndex(i) {
|
|
expected = false
|
|
}
|
|
if bA3.GetIndex(i) != expected {
|
|
t.Error("Wrong bit from bA3")
|
|
}
|
|
}
|
|
}
|
|
|
|
func TestPickRandom(t *testing.T) {
|
|
for idx := 0; idx < 123; idx++ {
|
|
bA1 := NewBitArray(123)
|
|
bA1.SetIndex(idx, true)
|
|
index, ok := bA1.PickRandom()
|
|
if !ok {
|
|
t.Fatal("Expected to pick element but got none")
|
|
}
|
|
if index != idx {
|
|
t.Fatalf("Expected to pick element at %v but got wrong index", idx)
|
|
}
|
|
}
|
|
}
|
|
|
|
func TestBytes(t *testing.T) {
|
|
bA := NewBitArray(4)
|
|
bA.SetIndex(0, true)
|
|
check := func(bA *BitArray, bz []byte) {
|
|
if !bytes.Equal(bA.Bytes(), bz) {
|
|
panic(Fmt("Expected %X but got %X", bz, bA.Bytes()))
|
|
}
|
|
}
|
|
check(bA, []byte{0x01})
|
|
bA.SetIndex(3, true)
|
|
check(bA, []byte{0x09})
|
|
|
|
bA = NewBitArray(9)
|
|
check(bA, []byte{0x00, 0x00})
|
|
bA.SetIndex(7, true)
|
|
check(bA, []byte{0x80, 0x00})
|
|
bA.SetIndex(8, true)
|
|
check(bA, []byte{0x80, 0x01})
|
|
|
|
bA = NewBitArray(16)
|
|
check(bA, []byte{0x00, 0x00})
|
|
bA.SetIndex(7, true)
|
|
check(bA, []byte{0x80, 0x00})
|
|
bA.SetIndex(8, true)
|
|
check(bA, []byte{0x80, 0x01})
|
|
bA.SetIndex(9, true)
|
|
check(bA, []byte{0x80, 0x03})
|
|
}
|
|
|
|
func TestEmptyFull(t *testing.T) {
|
|
ns := []int{47, 123}
|
|
for _, n := range ns {
|
|
bA := NewBitArray(n)
|
|
if !bA.IsEmpty() {
|
|
t.Fatal("Expected bit array to be empty")
|
|
}
|
|
for i := 0; i < n; i++ {
|
|
bA.SetIndex(i, true)
|
|
}
|
|
if !bA.IsFull() {
|
|
t.Fatal("Expected bit array to be full")
|
|
}
|
|
}
|
|
}
|