322 lines
6.4 KiB
V
322 lines
6.4 KiB
V
import bitfield
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import rand
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import time
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fn test_bf_new_size() {
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instance := bitfield.new(75)
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assert instance.getsize() == 75
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}
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fn test_bf_set_clear_toggle_get() {
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mut instance := bitfield.new(75)
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instance.setbit(47)
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assert instance.getbit(47) == 1
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instance.clearbit(47)
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assert instance.getbit(47) == 0
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instance.togglebit(47)
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assert instance.getbit(47) == 1
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}
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fn test_bf_and_not_or_xor() {
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rand.seed(time.now().uni)
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len := 80
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mut input1 := bitfield.new(len)
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mut input2 := bitfield.new(len)
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mut i := 0
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for i < len {
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if rand.next(2) == 1 {
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input1.setbit(i)
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}
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if rand.next(2) == 1{
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input2.setbit(i)
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}
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i++
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}
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output1 := bitfield.bfxor(input1, input2)
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bfand := bitfield.bfand(input1, input2)
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bfor := bitfield.bfor(input1, input2)
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bfnot := bitfield.bfnot(bfand)
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output2 := bitfield.bfand(bfor, bfnot)
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mut result := 1
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for i < len {
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if output1.getbit(i) != output2.getbit(i) {result = 0}
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}
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assert result == 1
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}
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fn test_clone_cmp() {
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rand.seed(time.now().uni)
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len := 80
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mut input := bitfield.new(len)
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for i := 0; i < len; i++ {
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if rand.next(2) == 1 {
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input.setbit(i)
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}
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}
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output := bitfield.clone(input)
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assert output.getsize() == len
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assert bitfield.cmp(input, output) == true
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}
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fn test_slice_join() {
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rand.seed(time.now().uni)
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len := 80
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mut input := bitfield.new(len)
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for i := 0; i < len; i++ {
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if rand.next(2) == 1 {
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input.setbit(i)
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}
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}
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mut result := 1
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for point := 1; point < (len - 1); point++ {
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// divide a bitfield into two subfields
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chunk1 := input.slice(0, point)
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chunk2 := input.slice(point, input.getsize())
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// concatenate them back into one and compare to the original
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output := bitfield.join(chunk1, chunk2)
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if !bitfield.cmp(input, output) {
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result = 0
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}
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}
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assert result == 1
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}
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fn test_popcount() {
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rand.seed(time.now().uni)
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len := 80
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mut count0 := 0
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mut input := bitfield.new(len)
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for i := 0; i < len; i++ {
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if rand.next(2) == 1 {
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input.setbit(i)
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count0++
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}
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}
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count1 := input.popcount()
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assert count0 == count1
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}
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fn test_hamming() {
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rand.seed(time.now().uni)
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len := 80
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mut count := 0
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mut input1 := bitfield.new(len)
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mut input2 := bitfield.new(len)
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for i := 0; i < len; i++ {
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match rand.next(4) {
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0, 1 {
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input1.setbit(i)
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count++
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}
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2 {
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input2.setbit(i)
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count++
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}
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3 {
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input1.setbit(i)
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input2.setbit(i)
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}
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}
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}
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assert count == bitfield.hamming(input1, input2)
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}
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fn test_bf_from_bytes() {
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input := [byte(0xF0), byte(0x0F), byte(0xF0), byte(0xFF)]
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output := bitfield.from_bytes(input)
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mut result := 1
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for i := 0; i < input.len * 8; i++ {
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expected := input[input.len - 1 - i / 8] >> i % 8 & 1
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actual := output.getbit(i)
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if expected != actual {
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result = 0
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}
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}
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assert result == 1
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}
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fn test_bf_str2bf() {
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rand.seed(time.now().uni)
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len := 80
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mut input := ''
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for i := 0; i < len; i++ {
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if rand.next(2) == 1 {
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input = input + '1'
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}
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else {
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input = input + '0'
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}
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}
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output := bitfield.str2bf(input)
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mut result := 1
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for i := 0; i < len; i++ {
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if input[i] != output.getbit(i) + 48 {
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result = 0
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}
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}
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assert result == 1
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}
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fn test_bf_bf2str() {
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rand.seed(time.now().uni)
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len := 80
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mut input := bitfield.new(len)
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for i := 0; i < len; i++ {
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if rand.next(2) == 1 {
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input.setbit(i)
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}
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}
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mut check := ''
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for i := 0; i < len; i++ {
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if input.getbit(i) == 1 {
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check = check + '1'
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}
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else {
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check = check + '0'
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}
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}
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output := input.string()
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mut result := 1
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for i := 0; i < len; i++ {
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if check[i] != output[i] {
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result = 0
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}
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}
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assert result == 1
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}
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fn test_bf_setall() {
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rand.seed(time.now().uni)
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len := 80
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mut input := bitfield.new(len)
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input.setall()
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mut result := 1
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for i := 0; i < len; i++ {
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if input.getbit(i) != 1 {
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result = 0
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}
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}
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assert result == 1
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}
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fn test_bf_clearall() {
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rand.seed(time.now().uni)
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len := 80
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mut input := bitfield.new(len)
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for i := 0; i < len; i++ {
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if rand.next(2) == 1 {
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input.setbit(i)
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}
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}
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input.clearall()
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mut result := 1
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for i := 0; i < len; i++ {
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if input.getbit(i) != 0 {
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result = 0
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}
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}
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assert result == 1
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}
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fn test_bf_reverse() {
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rand.seed(time.now().uni)
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len := 80
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mut input := bitfield.new(len)
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for i := 0; i < len; i++ {
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if rand.next(2) == 1 {
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input.setbit(i)
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}
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}
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check := bitfield.clone(input)
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output := input.reverse()
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mut result := 1
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for i := 0; i < len; i++ {
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if output.getbit(i) != check.getbit(len - i - 1) {
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result = 0
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}
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}
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assert result == 1
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}
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fn test_bf_resize() {
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rand.seed(time.now().uni)
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len := 80
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mut input := bitfield.new(rand.next(len) + 1)
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for i := 0; i < 100; i++ {
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input.resize(rand.next(len) + 1)
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input.setbit(input.getsize() - 1)
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}
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assert input.getbit(input.getsize() - 1) == 1
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}
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fn test_bf_pos() {
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/**
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* set haystack size to 80
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* test different sizes of needle, from 1 to 80
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* test different positions of needle, from 0 to where it fits
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* all haystacks here contain exactly one instanse of needle,
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* so search should return non-negative-values
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**/
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rand.seed(time.now().uni)
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len := 80
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mut result := 1
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for i := 1; i < len; i++ { // needle size
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for j := 0; j < len - i; j++ { // needle position in the haystack
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// create the needle
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mut needle := bitfield.new(i)
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// fill the needle with random values
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for k := 0; k < i; k++ {
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if rand.next(2) == 1 {
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needle.setbit(k)
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}
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}
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// make sure the needle contains at least one set bit, selected randomly
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r := rand.next(i)
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needle.setbit(r)
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// create the haystack, make sure it contains the needle
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mut haystack := bitfield.clone(needle)
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// if there is space between the start of the haystack and the sought needle, fill it with zeroes
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if j > 0 {
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start := bitfield.new(j)
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tmp := bitfield.join(start, haystack)
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haystack = tmp
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}
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// if there is space between the sought needle and the end of haystack, fill it with zeroes
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if j + i < len {
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end := bitfield.new(len - j - i)
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tmp2 := bitfield.join(haystack, end)
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haystack = tmp2
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}
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// now let's test
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// the result should be equal to j
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if haystack.pos(needle) != j {
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result = 0
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}
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}
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}
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assert result == 1
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}
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fn test_bf_rotate() {
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mut result := 1
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len := 80
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for i := 1; i < 80 && result == 1; i++ {
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mut chunk1 := bitfield.new(i)
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chunk2 := bitfield.new(len - i)
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chunk1.setall()
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input := bitfield.join(chunk1, chunk2)
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output := input.rotate(i)
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if output.getbit(len - i - 1) != 0 || output.getbit(len - i) != 1 {
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result = 0
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}
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}
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assert result == 1
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}
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