forked from mynameisfiber/gohll
/
gob_test.go
78 lines (63 loc) · 1.66 KB
/
gob_test.go
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package gohll
import (
"bytes"
"encoding/gob"
"fmt"
"math"
"math/rand"
"testing"
"github.com/stretchr/testify/assert"
)
func TestGobSparse(t *testing.T) {
h, err := NewHLL(20)
assert.Nil(t, err)
var i float64
for i = 0; i <= 50000; i++ {
h.Add(fmt.Sprintf("%d-%d", i, rand.Uint32()))
}
assert.Equal(t, h.format, SPARSE, "Not using sparse mode")
c := h.Cardinality()
errorRate := 1.04 / math.Sqrt(float64(h.m2))
checkErrorBounds(t, c, i, errorRate)
var buf bytes.Buffer
err = gob.NewEncoder(&buf).Encode(h)
assert.Nil(t, err)
var h2 HLL
err = gob.NewDecoder(&buf).Decode(&h2)
assert.Nil(t, err)
assert.Equal(t, h2.format, SPARSE, "Not using sparse mode")
assert.Equal(t, c, h2.Cardinality())
for i = 0; i <= 40000; i++ {
v := rand.Uint32()
h.Add(fmt.Sprintf("%d-%d", i, v))
h2.Add(fmt.Sprintf("%d-%d", i, v))
}
assert.Equal(t, h.Cardinality(), h2.Cardinality())
}
func TestGobNormal(t *testing.T) {
h, err := NewHLL(10)
assert.Nil(t, err)
h.ToNormal()
var i float64
for i = 0; i <= 100000; i++ {
h.Add(fmt.Sprintf("%d-%d", i, rand.Uint32()))
}
assert.Equal(t, h.format, NORMAL, "Not using normal mode")
c := h.Cardinality()
errorRate := 1.04 / math.Sqrt(float64(h.m1))
checkErrorBounds(t, c, i, errorRate)
var buf bytes.Buffer
err = gob.NewEncoder(&buf).Encode(h)
assert.Nil(t, err)
var h2 HLL
err = gob.NewDecoder(&buf).Decode(&h2)
assert.Nil(t, err)
assert.Equal(t, h2.format, NORMAL, "Not using normal mode")
assert.Equal(t, c, h2.Cardinality())
for i = 0; i <= 40000; i++ {
v := rand.Uint32()
h.Add(fmt.Sprintf("%d-%d", i, v))
h2.Add(fmt.Sprintf("%d-%d", i, v))
}
assert.Equal(t, h.Cardinality(), h2.Cardinality())
}