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bitset_test.go
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package bitset
import (
"fmt"
"math"
"testing"
"github.com/stretchr/testify/assert"
)
var configs = [][]uint{
[]uint{16},
[]uint{7, 5},
[]uint{4, 0, 0, 0, 0},
[]uint{8, 4, 2, 1},
[]uint{1, 0, 1, 0, 1, 0},
[]uint{2, 2, 2, 2, 2, 2, 2},
}
func TestBitsetNewCount(t *testing.T) {
for _, cfg := range configs {
t.Run(fmt.Sprintf("%v", cfg), func(t *testing.T) {
b := New(cfg)
assert.EqualValues(t, b.Count(), 0, "new bitset should have count 0")
})
}
}
func TestBitsetMaxIndex(t *testing.T) {
for _, cfg := range configs {
t.Run(fmt.Sprintf("%v", cfg), func(t *testing.T) {
b := New(cfg)
var bits uint = 0
for _, t := range cfg {
bits += t
}
max := (1 << bits) - 1
assert.EqualValues(t, max, b.Max())
})
}
}
func TestBitsetSetClearTest(t *testing.T) {
for _, cfg := range configs {
t.Run(fmt.Sprintf("%v", cfg), func(t *testing.T) {
b := New(cfg)
i := b.Max() / 2
assert.NotNil(t, b.Set(i))
assert.EqualValues(t, b.Count(), 1)
assert.EqualValues(t, b.Test(i), true)
assert.NotNil(t, b.Set(i))
assert.EqualValues(t, b.Count(), 1)
assert.EqualValues(t, b.Test(i), true)
assert.NotNil(t, b.Clear(i))
assert.EqualValues(t, b.Count(), 0)
assert.EqualValues(t, b.Test(i), false)
assert.NotNil(t, b.Clear(i))
assert.EqualValues(t, b.Count(), 0)
assert.EqualValues(t, b.Test(i), false)
i = b.Max()
assert.EqualValues(t, b.Test(i), false)
assert.NotNil(t, b.Clear(i))
assert.EqualValues(t, b.Test(i), false)
assert.NotNil(t, b.Set(i))
assert.EqualValues(t, b.Test(i), true)
})
}
}
func TestBitsetAnyAllNone(t *testing.T) {
for _, cfg := range configs {
t.Run(fmt.Sprintf("%v", cfg), func(t *testing.T) {
b := New(cfg)
assert.EqualValues(t, false, b.Any())
assert.EqualValues(t, false, b.All())
assert.EqualValues(t, true, b.None())
assert.NotNil(t, b.SetAll())
assert.EqualValues(t, true, b.Any())
assert.EqualValues(t, true, b.All())
assert.EqualValues(t, false, b.None())
assert.NotNil(t, b.ClearAll())
assert.EqualValues(t, false, b.Any())
assert.EqualValues(t, false, b.All())
assert.EqualValues(t, true, b.None())
i := b.Max() / 2
assert.NotNil(t, b.Set(i))
assert.EqualValues(t, true, b.Any())
assert.EqualValues(t, false, b.All())
assert.EqualValues(t, false, b.None())
assert.NotNil(t, b.Clear(i))
assert.EqualValues(t, false, b.Any())
assert.EqualValues(t, false, b.All())
assert.EqualValues(t, true, b.None())
})
}
}
func TestBitsetSetAllClearAll(t *testing.T) {
for _, cfg := range configs {
t.Run(fmt.Sprintf("%v", cfg), func(t *testing.T) {
b := New(cfg)
i := b.Max() / 2
assert.EqualValues(t, false, b.Test(i))
assert.EqualValues(t, false, b.Any())
assert.EqualValues(t, false, b.All())
assert.EqualValues(t, true, b.None())
assert.NotNil(t, b.SetAll())
assert.EqualValues(t, true, b.Test(i))
assert.EqualValues(t, true, b.Any())
assert.EqualValues(t, true, b.All())
assert.EqualValues(t, false, b.None())
assert.EqualValues(t, b.Cap(), b.Count())
assert.NotNil(t, b.ClearAll())
assert.EqualValues(t, false, b.Test(i))
assert.EqualValues(t, false, b.Any())
assert.EqualValues(t, false, b.All())
assert.EqualValues(t, true, b.None())
assert.EqualValues(t, 0, b.Count())
})
}
}
func TestBitsetNextSet(t *testing.T) {
for _, cfg := range configs {
t.Run(fmt.Sprintf("%v", cfg), func(t *testing.T) {
b := New(cfg)
idx, found := b.NextSet(0)
assert.EqualValues(t, found, false)
idx, found = b.NextSet(math.MaxUint64)
assert.EqualValues(t, found, false)
for i := uint64(0); i <= b.Max(); i++ {
b.Set(i)
idx, found = b.NextSet(0)
assert.EqualValues(t, true, found)
assert.EqualValues(t, i, idx)
idx, found = b.NextSet(i)
assert.EqualValues(t, true, found)
assert.EqualValues(t, i, idx)
idx, found = b.NextSet(i + 1)
assert.EqualValues(t, false, found)
b.Clear(i)
idx, found = b.NextSet(0)
assert.EqualValues(t, false, found)
}
})
}
}
func TestBitsetPrevSet(t *testing.T) {
for _, cfg := range configs {
t.Run(fmt.Sprintf("%v", cfg), func(t *testing.T) {
b := New(cfg)
idx, found := b.PrevSet(0)
assert.EqualValues(t, false, found)
idx, found = b.PrevSet(b.Max())
assert.EqualValues(t, false, found)
idx, found = b.PrevSet(math.MaxUint64)
assert.EqualValues(t, false, found)
for i := uint64(0); i <= b.Max(); i++ {
b.Set(i)
idx, found = b.PrevSet(i)
assert.EqualValues(t, true, found)
assert.EqualValues(t, i, idx)
idx, found = b.PrevSet(i + 1)
assert.EqualValues(t, true, found)
assert.EqualValues(t, i, idx)
idx, found = b.PrevSet(b.Max())
assert.EqualValues(t, true, found)
assert.EqualValues(t, i, idx)
b.Clear(i)
idx, found = b.PrevSet(b.Max())
assert.EqualValues(t, false, found)
}
})
}
}
func TestBitsetNextClear(t *testing.T) {
for _, cfg := range configs {
t.Run(fmt.Sprintf("%v", cfg), func(t *testing.T) {
b := New(cfg)
// set all
b.ForEachClear(func(idx uint64) bool {
b.Set(idx)
return true
})
idx, found := b.NextClear(0)
assert.EqualValues(t, found, false)
for i := uint64(0); i <= b.Max(); i++ {
b.Clear(i)
idx, found = b.NextClear(0)
assert.EqualValues(t, true, found)
assert.EqualValues(t, i, idx)
idx, found = b.NextClear(i)
assert.EqualValues(t, true, found)
assert.EqualValues(t, i, idx)
idx, found = b.NextClear(i + 1)
assert.EqualValues(t, false, found)
b.Set(i)
idx, found = b.NextClear(0)
assert.EqualValues(t, false, found)
}
})
}
}
func TestBitsetPrevClear(t *testing.T) {
for _, cfg := range configs {
t.Run(fmt.Sprintf("%v", cfg), func(t *testing.T) {
b := New(cfg)
// set all
b.ForEachClear(func(idx uint64) bool {
b.Set(idx)
return true
})
idx, found := b.PrevClear(0)
assert.EqualValues(t, found, false)
idx, found = b.PrevClear(math.MaxUint64)
assert.EqualValues(t, found, false)
for i := uint64(0); i <= b.Max(); i++ {
b.Clear(i)
idx, found = b.PrevClear(i)
assert.EqualValues(t, true, found)
assert.EqualValues(t, i, idx)
idx, found = b.PrevClear(i + 1)
assert.EqualValues(t, true, found)
assert.EqualValues(t, i, idx)
idx, found = b.PrevClear(b.Max())
assert.EqualValues(t, true, found)
assert.EqualValues(t, i, idx)
b.Set(i)
idx, found = b.PrevClear(math.MaxUint64)
assert.EqualValues(t, false, found)
}
})
}
}