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bitarray_compare_test.go
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bitarray_compare_test.go
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// Copyright (c) 2021 Hirotsuna Mizuno. All rights reserved.
// Use of this source code is governed by the MIT license that can be found in
// the LICENSE file.
package bitarray_test
import (
"fmt"
"math/rand"
"sort"
"strings"
"testing"
"time"
"github.com/tunabay/go-bitarray"
)
func TestBitArray_Equal(t *testing.T) {
const nillit = "<nil>"
fail := func(x, y *bitarray.BitArray) {
t.Helper()
if t.Failed() {
t.Logf("x: [%# b]", x)
t.Logf("y: [%# b]", y)
t.Logf("x: %s", x.D())
t.Logf("y: %s", y.D())
t.FailNow()
}
}
test := func(x, y *bitarray.BitArray, exp bool) {
t.Helper()
if x.Equal(y) != exp {
t.Errorf("unexpected x.Equal(y): got %t, want %t", !exp, exp)
}
fail(x, y)
if x == nil || y == nil {
return
}
xe, ye := x.ZExpand(), y.ZExpand()
xo, yo := x.ZOptimize(), y.ZOptimize()
switch {
case xe.Equal(ye) != exp:
t.Errorf("unexpected xe.Equal(ye): got %t, want %t", !exp, exp)
case xe.Equal(yo) != exp:
t.Errorf("unexpected xe.Equal(yo): got %t, want %t", !exp, exp)
case xo.Equal(yo) != exp:
t.Errorf("unexpected xo.Equal(yo): got %t, want %t", !exp, exp)
}
fail(x, y)
}
ptwo := func(xs, ys string) (x, y *bitarray.BitArray) {
t.Helper()
if xs != nillit {
x = bitarray.MustParse(xs)
}
if ys != nillit {
y = bitarray.MustParse(ys)
}
return
}
equal := func(xs, ys string) {
t.Helper()
x, y := ptwo(xs, ys)
test(x, y, true)
test(y, x, true)
}
differ := func(xs, ys string) {
t.Helper()
x, y := ptwo(xs, ys)
test(x, y, false)
test(y, x, false)
}
equal(nillit, nillit)
equal(nillit, "")
differ(nillit, "0")
equal("0", "0")
equal("00", "00")
equal("000", "000")
equal("0000", "0000")
equal("0000-0", "0000-0")
equal("0000-00", "0000-00")
equal("0000-000", "0000-000")
equal("0000-0000", "0000-0000")
equal("0000-0000 0", "0000-0000 0")
equal("0000-0000 0000-0000", "0000-0000 0000-0000")
equal("0000-0000 0000-0000 0000-000", "0000-0000 0000-0000 0000-000")
differ("0000-0000 0000-0000 0000-000", "0000-0000 0000-0000 0000-0000")
differ("0000-0000 0000-0000 0000-0000", "0000-0000 0000-0000 0000-0000 0")
differ("0", "00")
differ("0", "000")
differ("0", "0000")
differ("0", "0000-0")
differ("0", "0000-00")
differ("0", "0000-000")
differ("0", "0000-0000")
differ("0", "0000-0000 0")
differ("0", "0000-0000 00")
differ("0000-000", "0000-0000")
differ("0000-0000", "0000-0000 0")
differ("0000-001", "0000-0010")
differ("0000-0000 10", "0000-0000 100")
equal("1", "1")
differ("1", "0")
differ("1", "10")
differ("1", "100")
differ("1", "1000")
differ("1", "1000-0000")
differ("1", "0000-0001")
differ("1", "0000-0000 1")
differ("1", "1000-0000 00")
equal("0000-1111 1111-0000 0000-1111", "0000-1111 1111-0000 0000-1111")
differ("0000-1111 1111-0000 0000-1111", "0000-1111 1111-0000 0000-1111 0")
differ("0000-1111 1111-0000 0000-1111 1", "0000-1111 1111-0000 0000-1111 0")
differ("0000-1111 1111-0000 0000-1111 1", "0000-1111 1011-0000 0000-1111 1")
differ("0000-1110 1111-0000 0000-1111 1", "0000-1111 1111-0000 0000-1111 1")
}
func TestBitArray_Compare(t *testing.T) {
src := []string{
"",
"0",
"00",
"000",
"0000",
"0000-0",
"0000-00",
"0000-000",
"0000-0000",
"0000-0000 0",
"0000-0000 00",
"0000-0000 000",
"0000-0000 0000",
"0000-0000 0000-0",
"0000-0000 0000-00",
"0000-0000 0000-000",
"0000-0000 0000-0000",
"0000-0000 0000-0000 0",
"0000-0000 0000-0000 00",
"0000-0001",
"0000-0001 00",
"0000-0001 0000-0000 0000-0000",
"0000-0001 0000-0000 0000-0000 0",
"0000-0001 0000-0000 0000-0000 1",
"0000-0001 0000-0000 0000-0001",
"0000-0001 0000-0000 0000-0001 0",
"0000-0001 0000-0000 0000-0001 1",
"0000-0001 0000-0001",
"0000-0001 01",
"0000-0001 1",
"0000-0001 11",
"0000-0010",
"0000-0100",
"0000-1000",
"0000-1100 0000-0000 0000-0000 0000-0000 0000-000",
"0000-1100 0000-0000 0000-0000 0000-0000 0000-0000",
"0000-1100 0000-0000 0000-0000 0000-0000 0000-0000 0",
"0000-1100 0000-0000 0000-0000 0000-0000 0000-0000 00",
"0000-1100 0000-0000 0000-0000 0000-0000 0000-0000 0000",
"0000-1100 0000-0000 0000-0000 0000-0000 0000-0000 0011",
"0000-1100 0000-0000 0000-0000 0000-0000 0000-0000 01",
"0000-1100 0000-0000 0000-0000 0100-0000 0000-000",
"0000-1100 0000-0000 0000-0000 1000-0000 0000-00",
"0000-1100 0000-0000 0000-0000 1000-0000 0000-000",
"0000-1101 1111-1110 0000-0000",
"0000-1101 1111-1110 0000-0000 0",
"0000-1101 1111-1110 0000-0001",
"0000-1101 1111-1110 0000-001",
"0000-1101 1111-1110 0000-01",
"0000-1101 1111-1110 0000-1",
"0000-1101 1111-1110 0000-10",
"0000-1101 1111-1110 0000-100",
"0000-1101 1111-1110 0000-1000",
"0000-1101 1111-1110 0000-11",
"0000-1101 1111-1110 0001",
"0000-1101 1111-1111 0",
"0000-1101 1111-1111 00",
"0000-1101 1111-1111 000",
"0000-1101 1111-1111 1",
"0000-1101 1111-1111 11",
"0000-1101 1111-1111 111",
"0000-1111",
"0000-1111 0",
"0000-1111 00",
"0000-1111 1",
"0000-1111 10",
"0000-1111 11",
"0000-1111 1100",
"0000-1111 1100-1100",
"0000-1111 1100-1100 0",
"0000-1111 1100-1100 00",
"0000-1111 1100-1100 01",
"0000-1111 1100-1100 1",
"0000-1111 1100-1100 10",
"0000-1111 1100-1100 11",
"01",
"010",
"0101",
"0101-0",
"0101-01",
"0101-010",
"0101-0101",
"0101-0101 0",
"0101-0101 01",
"0111",
"0111-0",
"0111-00",
"0111-01",
"0111-1",
"0111-10",
"0111-101",
"0111-11",
"0111-1100",
"0111-1100 0",
"0111-1101",
"1",
"10",
"1000-0000 0000-0000 0000-0000 0000-0000 0000-0000 0000-0",
"1000-0000 0000-0000 0000-0000 0000-0000 0000-0000 0000-00",
"1000-0000 0000-0000 0000-0000 0000-0000 0000-0000 0000-0000",
"1000-0000 0000-0000 0000-0000 0000-0000 0000-0000 0000-0000 0",
"1000-0000 0000-0000 0000-0000 0000-0000 0000-0000 0000-0000 00",
"1000-0000 0000-0000 0000-0000 0000-0000 0000-0000 0000-0000 000",
"1000-0000 0000-0000 0000-0000 0000-0000 0000-0000 0000-0000 1",
"1000-0000 0000-0000 0000-0000 0000-0000 0000-0000 0000-0000 10",
"1000-0000 0000-0000 0000-0000 0000-0000 0000-0000 0000-0000 100",
"1000-0000 0000-0000 0000-0000 0000-0000 0000-0000 0000-0000 11",
"1000-0000 0000-0000 0000-0000 0000-0000 0000-0000 0000-0001",
"1000-0000 0000-0000 0000-0000 0000-0000 0000-0000 0000-001",
"1000-0000 0000-0000 0000-0000 0000-0000 0000-0000 0000-01",
"1000-0000 0000-0000 0000-0000 0000-0000 0000-0000 0000-1",
"11",
"111",
"1111",
"1111-1",
"1111-11",
"1111-111",
"1111-1111",
"1111-1111 1",
"1111-1111 11",
"1111-1111 111",
"1111-1111 1111",
"1111-1111 1111-1",
"1111-1111 1111-11",
"1111-1111 1111-110",
"1111-1111 1111-111",
"1111-1111 1111-1111",
"1111-1111 1111-1111 1",
"1111-1111 1111-1111 11",
}
dat := make([]*bitarray.BitArray, len(src))
for i, s := range src {
if i+1 < len(src) {
next := src[i+1]
if next <= s {
t.Errorf("misordered data samples:")
t.Logf("#%3d: %q", i, s)
t.Logf("#%3d: %q", i+1, next)
t.FailNow()
}
}
dat[i] = bitarray.MustParse(s)
// t.Logf("data: %s", dat[i].D())
}
for i := 0; i < len(dat); i++ {
x := dat[i]
xe := x.ZExpand()
xo := x.ZOptimize()
for j := 0; j < len(dat); j++ {
y := dat[j]
ye := y.ZExpand()
yo := y.ZOptimize()
c := bitarray.Compare(x, y)
switch {
case i == j && c != 0:
t.Errorf("unexpected result: got %d, want 0, x == y:", c)
case i < j && c != -1:
t.Errorf("unexpected result: got %d, want -1, x < y:", c)
case j < i && c != +1:
t.Errorf("unexpected result: got %d, want +1, y < x:", c)
}
if ca := bitarray.Compare(xe, ye); ca != c {
t.Errorf("unexpected result (e,e): got %d, want %d", ca, c)
}
if ca := bitarray.Compare(xe, yo); ca != c {
t.Errorf("unexpected result (e,o): got %d, want %d", ca, c)
}
if ca := bitarray.Compare(xo, yo); ca != c {
t.Errorf("unexpected result (o,o): got %d, want %d", ca, c)
}
if t.Failed() {
t.Logf("x: [%# b]", x)
t.Logf("y: [%# b]", y)
t.Logf("x: %s", x.D())
t.Logf("y: %s", y.D())
t.FailNow()
}
// t.Logf("passed: [%# b] %c [%# b]", x, "<=>"[c+1], y)
}
}
}
func TestBitArray_Compare_rand(t *testing.T) {
const testIterations = 256
const listSize = 256
rand.Seed(time.Now().UnixNano())
mkdat := func() []*bitarray.BitArray {
t.Helper()
src := make([]string, listSize)
for i := range src {
n := rand.Intn(256)
if n == 0 || rand.Intn(64) == 0 {
continue
}
b := make([]byte, (n+7)>>3)
rand.Read(b)
s := fmt.Sprintf("%08b", b)
s = strings.Trim(s, "[]")
s = strings.ReplaceAll(s, " ", "")
src[i] = s[:n]
}
sort.Strings(src)
bas := make([]*bitarray.BitArray, 0, listSize)
for i, s := range src {
if 0 < i && s == src[i-1] {
continue
}
ba := bitarray.MustParse(s)
bas = append(bas, ba)
// t.Logf("dat: %# b", ba)
}
return bas
}
for i := 0; i < testIterations; i++ {
dat := mkdat()
for xi, x := range dat {
for yi, y := range dat {
c := bitarray.Compare(x, y)
switch {
case xi == yi && c != 0:
t.Errorf("unexpected result: got %d, want 0, x == y:", c)
case xi < yi && c != -1:
t.Errorf("unexpected result: got %d, want -1, x < y:", c)
case yi < xi && c != +1:
t.Errorf("unexpected result: got %d, want +1, y < x:", c)
}
if t.Failed() {
t.Logf("x: [%# b]", x)
t.Logf("y: [%# b]", y)
t.Logf("x: %s", x.D())
t.Logf("y: %s", y.D())
t.FailNow()
}
// t.Logf("passed: [%# b] %c [%# b]", x, "<=>"[c+1], y)
}
}
}
}