github.com/benz9527/xboot@v0.0.0-20240504061247-c23f15593274/lib/bits/bits_test.go (about)

     1  package bits
     2  
     3  import (
     4  	"testing"
     5  
     6  	"github.com/stretchr/testify/assert"
     7  )
     8  
     9  func TestRoundupPowOf2(t *testing.T) {
    10  	n := RoundupPowOf2(7)
    11  	assert.Equal(t, RoundupPowOf2ByCeil(7), n)
    12  	assert.Equal(t, RoundupPowOf2ByLoop(7), n)
    13  
    14  	n = RoundupPowOf2(10)
    15  	assert.Equal(t, RoundupPowOf2ByCeil(10), n)
    16  	assert.Equal(t, RoundupPowOf2ByLoop(10), n)
    17  
    18  	n = RoundupPowOf2(17)
    19  	assert.Equal(t, RoundupPowOf2ByCeil(17), n)
    20  	assert.Equal(t, RoundupPowOf2ByLoop(17), n)
    21  
    22  	n = RoundupPowOf2(127)
    23  	assert.Equal(t, RoundupPowOf2ByCeil(127), n)
    24  	assert.Equal(t, RoundupPowOf2ByLoop(127), n)
    25  }
    26  
    27  func TestCeilPowOf2(t *testing.T) {
    28  	n := CeilPowOf2(7)
    29  	assert.Equal(t, uint8(3), n)
    30  
    31  	n = CeilPowOf2(10)
    32  	assert.Equal(t, uint8(4), n)
    33  
    34  	n = CeilPowOf2(17)
    35  	assert.Equal(t, uint8(5), n)
    36  }
    37  
    38  func TestOneBitsConvert(t *testing.T) {
    39  	n := int8(-1)
    40  	assert.Equal(t, uint64(255), convert[int8](n))
    41  
    42  	n2 := int16(-1)
    43  	assert.Equal(t, uint64(65535), convert[int16](n2))
    44  
    45  }
    46  
    47  func TestHammingWeight(t *testing.T) {
    48  	n := 7
    49  	assert.Equal(t, uint8(3), HammingWeightBySWARV1[int](n))
    50  	assert.Equal(t, uint8(3), HammingWeightBySWARV2[int](n))
    51  	assert.Equal(t, uint8(3), HammingWeightBySWARV3[int](n))
    52  	assert.Equal(t, uint8(3), HammingWeightByGroupCount[int](n))
    53  
    54  	n2 := int64(0)
    55  	assert.Equal(t, uint8(0), HammingWeightBySWARV1[int64](n2))
    56  	assert.Equal(t, uint8(0), HammingWeightBySWARV2[int64](n2))
    57  	assert.Equal(t, uint8(0), HammingWeightBySWARV3[int64](n2))
    58  	assert.Equal(t, uint8(0), HammingWeightByGroupCount[int64](n2))
    59  
    60  	n3 := int8(-1)
    61  	assert.Equal(t, uint8(8), HammingWeightBySWARV1[int8](n3))
    62  	assert.Equal(t, uint8(8), HammingWeightBySWARV2[int8](n3))
    63  	assert.Equal(t, uint8(8), HammingWeightBySWARV3[int8](n3))
    64  	assert.Equal(t, uint8(8), HammingWeightByGroupCount[int8](n3))
    65  
    66  	n4 := int16(-1)
    67  	assert.Equal(t, uint8(16), HammingWeightBySWARV1[int16](n4))
    68  	assert.Equal(t, uint8(16), HammingWeightBySWARV2[int16](n4))
    69  	assert.Equal(t, uint8(16), HammingWeightBySWARV3[int16](n4))
    70  	assert.Equal(t, uint8(16), HammingWeightByGroupCount[int16](n4))
    71  
    72  	n5 := int32(-1)
    73  	assert.Equal(t, uint8(32), HammingWeightBySWARV1[int32](n5))
    74  	assert.Equal(t, uint8(32), HammingWeightBySWARV2[int32](n5))
    75  	assert.Equal(t, uint8(32), HammingWeightBySWARV3[int32](n5))
    76  	assert.Equal(t, uint8(32), HammingWeightByGroupCount[int32](n5))
    77  
    78  	n6 := int64(-1)
    79  	assert.Equal(t, uint8(64), HammingWeightBySWARV1[int64](n6))
    80  	assert.Equal(t, uint8(64), HammingWeightBySWARV2[int64](n6))
    81  	assert.Equal(t, uint8(64), HammingWeightBySWARV3[int64](n6))
    82  	assert.Equal(t, uint8(64), HammingWeightByGroupCount[int64](n6))
    83  
    84  }