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.
257 lines
5.8 KiB
257 lines
5.8 KiB
package common
|
|
|
|
import (
|
|
"bytes"
|
|
"encoding/json"
|
|
"fmt"
|
|
"testing"
|
|
|
|
"github.com/stretchr/testify/assert"
|
|
"github.com/stretchr/testify/require"
|
|
)
|
|
|
|
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)
|
|
|
|
var bNil *BitArray
|
|
require.Equal(t, bNil.And(bA1), (*BitArray)(nil))
|
|
require.Equal(t, bA1.And(nil), (*BitArray)(nil))
|
|
require.Equal(t, bNil.And(nil), (*BitArray)(nil))
|
|
|
|
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)
|
|
|
|
bNil := (*BitArray)(nil)
|
|
require.Equal(t, bNil.Or(bA1), bA1)
|
|
require.Equal(t, bA1.Or(nil), bA1)
|
|
require.Equal(t, bNil.Or(nil), (*BitArray)(nil))
|
|
|
|
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 TestSub(t *testing.T) {
|
|
testCases := []struct {
|
|
initBA string
|
|
subtractingBA string
|
|
expectedBA string
|
|
}{
|
|
{`null`, `null`, `null`},
|
|
{`"x"`, `null`, `null`},
|
|
{`null`, `"x"`, `null`},
|
|
{`"x"`, `"x"`, `"_"`},
|
|
{`"xxxxxx"`, `"x_x_x_"`, `"_x_x_x"`},
|
|
{`"x_x_x_"`, `"xxxxxx"`, `"______"`},
|
|
{`"xxxxxx"`, `"x_x_x_xxxx"`, `"_x_x_x"`},
|
|
{`"x_x_x_xxxx"`, `"xxxxxx"`, `"______xxxx"`},
|
|
{`"xxxxxxxxxx"`, `"x_x_x_"`, `"_x_x_xxxxx"`},
|
|
{`"x_x_x_"`, `"xxxxxxxxxx"`, `"______"`},
|
|
}
|
|
for _, tc := range testCases {
|
|
var bA *BitArray
|
|
err := json.Unmarshal([]byte(tc.initBA), &bA)
|
|
require.Nil(t, err)
|
|
|
|
var o *BitArray
|
|
err = json.Unmarshal([]byte(tc.subtractingBA), &o)
|
|
require.Nil(t, err)
|
|
|
|
got, _ := json.Marshal(bA.Sub(o))
|
|
require.Equal(t, tc.expectedBA, string(got), "%s minus %s doesn't equal %s", tc.initBA, tc.subtractingBA, tc.expectedBA)
|
|
}
|
|
}
|
|
|
|
func TestPickRandom(t *testing.T) {
|
|
empty16Bits := "________________"
|
|
empty64Bits := empty16Bits + empty16Bits + empty16Bits + empty16Bits
|
|
testCases := []struct {
|
|
bA string
|
|
ok bool
|
|
}{
|
|
{`null`, false},
|
|
{`"x"`, true},
|
|
{`"` + empty16Bits + `"`, false},
|
|
{`"x` + empty16Bits + `"`, true},
|
|
{`"` + empty16Bits + `x"`, true},
|
|
{`"x` + empty16Bits + `x"`, true},
|
|
{`"` + empty64Bits + `"`, false},
|
|
{`"x` + empty64Bits + `"`, true},
|
|
{`"` + empty64Bits + `x"`, true},
|
|
{`"x` + empty64Bits + `x"`, true},
|
|
}
|
|
for _, tc := range testCases {
|
|
var bitArr *BitArray
|
|
err := json.Unmarshal([]byte(tc.bA), &bitArr)
|
|
require.NoError(t, err)
|
|
_, ok := bitArr.PickRandom()
|
|
require.Equal(t, tc.ok, ok, "PickRandom got an unexpected result on input %s", tc.bA)
|
|
}
|
|
}
|
|
|
|
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.Sprintf("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")
|
|
}
|
|
}
|
|
}
|
|
|
|
func TestUpdateNeverPanics(t *testing.T) {
|
|
newRandBitArray := func(n int) *BitArray {
|
|
ba, _ := randBitArray(n)
|
|
return ba
|
|
}
|
|
pairs := []struct {
|
|
a, b *BitArray
|
|
}{
|
|
{nil, nil},
|
|
{newRandBitArray(10), newRandBitArray(12)},
|
|
{newRandBitArray(23), newRandBitArray(23)},
|
|
{newRandBitArray(37), nil},
|
|
{nil, NewBitArray(10)},
|
|
}
|
|
|
|
for _, pair := range pairs {
|
|
a, b := pair.a, pair.b
|
|
a.Update(b)
|
|
b.Update(a)
|
|
}
|
|
}
|
|
|
|
func TestNewBitArrayNeverCrashesOnNegatives(t *testing.T) {
|
|
bitList := []int{-127, -128, -1 << 31}
|
|
for _, bits := range bitList {
|
|
_ = NewBitArray(bits)
|
|
}
|
|
}
|
|
|
|
func TestJSONMarshalUnmarshal(t *testing.T) {
|
|
|
|
bA1 := NewBitArray(0)
|
|
|
|
bA2 := NewBitArray(1)
|
|
|
|
bA3 := NewBitArray(1)
|
|
bA3.SetIndex(0, true)
|
|
|
|
bA4 := NewBitArray(5)
|
|
bA4.SetIndex(0, true)
|
|
bA4.SetIndex(1, true)
|
|
|
|
testCases := []struct {
|
|
bA *BitArray
|
|
marshalledBA string
|
|
}{
|
|
{nil, `null`},
|
|
{bA1, `null`},
|
|
{bA2, `"_"`},
|
|
{bA3, `"x"`},
|
|
{bA4, `"xx___"`},
|
|
}
|
|
|
|
for _, tc := range testCases {
|
|
tc := tc
|
|
t.Run(tc.bA.String(), func(t *testing.T) {
|
|
bz, err := json.Marshal(tc.bA)
|
|
require.NoError(t, err)
|
|
|
|
assert.Equal(t, tc.marshalledBA, string(bz))
|
|
|
|
var unmarshalledBA *BitArray
|
|
err = json.Unmarshal(bz, &unmarshalledBA)
|
|
require.NoError(t, err)
|
|
|
|
if tc.bA == nil {
|
|
require.Nil(t, unmarshalledBA)
|
|
} else {
|
|
require.NotNil(t, unmarshalledBA)
|
|
assert.EqualValues(t, tc.bA.Bits, unmarshalledBA.Bits)
|
|
if assert.EqualValues(t, tc.bA.String(), unmarshalledBA.String()) {
|
|
assert.EqualValues(t, tc.bA.Elems, unmarshalledBA.Elems)
|
|
}
|
|
}
|
|
})
|
|
}
|
|
}
|