qb/chunkenc/chunkenc_test.go

package chunkenc

import (
	"fmt"
	"testing"
)

func TestCumdelta(t *testing.T) {
	var (
		fracDigits byte = 0
		buf             = make([]byte, minBufferSize)
		value      float64
		done       bool
	)
	c := NewReverseCumulativeDeltaCompressor(buf, 0, fracDigits)
	// c.Append(1.55)
	// c.Append(23)
	// c.Append(23)
	// c.Append(23)
	// c.Append(23.5)

	c.Append(130)
	c.Append(191)

	c.Append(248)
	c.Append(305)

	//fmt.Printf("pos: %d\n", c.pos)
	//fmt.Printf("%d\n", buf.Chunks()[0])

	d := NewReverseCumulativeDeltaDecompressor(buf, c.Size(), fracDigits)

	for range 8 {
		value, done = d.NextValue()
		fmt.Println(value, done)
	}
}

func TestInsdelta(t *testing.T) {
	var (
		fracDigits byte = 2
		buf             = make([]byte, minBufferSize)
		value      float64
		done       bool
	)
	c := NewReverseInstantDeltaCompressor(buf, 0, fracDigits)
	c.Append(-1.55)
	c.Append(23)

	//fmt.Printf("pos: %d\n", c.pos)
	//fmt.Printf("%d\n", buf.Chunks()[0])

	c.Append(23)
	c.Append(23)

	c.Append(-23.5)

	//fmt.Printf("pos: %d\n", c.pos)
	//fmt.Printf("%d\n", buf.Chunks()[0])

	d := NewReverseInstantDeltaDecompressor(buf, c.Size(), fracDigits)

	for range 8 {
		value, done = d.NextValue()
		fmt.Println(value, done)
	}
}

func TestTimeDelta(t *testing.T) {
	var (
		buf   = make([]byte, minBufferSize)
		value uint32
		done  bool
	)
	c := NewReverseTimeDeltaCompressor(buf, 0)
	c.Append(10)

	//c.Append(131)

	//fmt.Printf("pos: %d\n", c.pos)
	//fmt.Printf("%d\n", buf.Chunks()[0])

	c.Append(70)

	c.Append(130)
	c.Append(191)

	c.Append(248)
	c.Append(305)
	c.Append(330)
	c.Append(390)
	c.Append(450)

	// fmt.Printf("pos: %d\n", c.pos)
	// fmt.Printf("%d\n", buf.Chunks()[0])

	//c.Sync()

	// bound := c.GetState()

	// fmt.Println("AFTER SYNC")
	// fmt.Printf("pos: %d\n", c.pos)
	// chunks := buf.Chunks()
	// if len(chunks) > 0 {
	// 	fmt.Printf("%d\n", chunks[0])
	// }

	d := NewReverseTimeDeltaDecompressor(buf, c.Size())
	// d.RestoreFromBound(bound)
	//d.RestoreFromEnd()

	for range 12 {
		value, done = d.NextValue()
		fmt.Println(value, done)
	}
}

func TestCumdeltaBound(t *testing.T) {
	var (
		fracDigits byte = 0
		buf             = make([]byte, minBufferSize)
		value      float64
		done       bool
	)
	c := NewReverseCumulativeDeltaCompressor(buf, 0, fracDigits)
	// c.Append(1.55)
	// c.Append(23)
	// c.Append(23)
	// c.Append(23)
	// c.Append(23.5)
	c.Append(10)
	c.Append(70)

	c.Append(130)

	// fmt.Printf("pos: %d\n", c.pos)
	// fmt.Printf("%d\n", buf.Chunks()[0])

	c.Append(191)

	// fmt.Printf("pos: %d\n", c.pos)
	// fmt.Printf("%d\n", buf.Chunks()[0])

	c.Append(191)

	fmt.Printf("pos: %d\n", c.pos)
	fmt.Printf("%d\n", buf.Chunks()[0])
	//////////////////////////

	c.Lock()

	//fmt.Printf("bound: pos=%d, h=%d\n", bound.Pos, bound.H)

	c.Append(248)
	c.Append(305)

	fmt.Printf("pos: %d\n", c.pos)
	fmt.Printf("%d\n", buf.Chunks()[0])

	d := NewReverseCumulativeDeltaDecompressor(buf, c.Size(), fracDigits)
	d.RestoreFromEnd()

	for range 8 {
		value, done = d.NextValue()
		fmt.Println(value, done)
	}

	//boundDecompressor := NewReverseCumulativeDeltaDecompressor(buf, c.Size(), fracDigits)
	//boundDecompressor.RestoreFromBound(bound)
	boundDecompressor := c.CreateDecompressor(fracDigits)

	fmt.Println("from bound:")
	for range 8 {
		value, done = boundDecompressor.NextValue()
		fmt.Println(value, done)
	}
}

func TestInsdeltaBound(t *testing.T) {
	var (
		fracDigits byte = 0
		buf             = make([]byte, minBufferSize)
		value      float64
		done       bool
	)
	c := NewReverseInstantDeltaCompressor(buf, 0, fracDigits)
	// c.Append(1.55)
	// c.Append(23)
	// c.Append(23)
	// c.Append(23)
	// c.Append(23.5)
	c.Append(10)
	c.Append(70)

	c.Append(130)

	// fmt.Printf("pos: %d\n", c.pos)
	// fmt.Printf("%d\n", buf.Chunks()[0])

	c.Append(191)

	// fmt.Printf("pos: %d\n", c.pos)
	// fmt.Printf("%d\n", buf.Chunks()[0])

	c.Append(191)

	fmt.Printf("pos: %d\n", c.pos)
	fmt.Printf("%d\n", buf.Chunks()[0])
	//////////////////////////

	//bound := c.GetState()

	//fmt.Printf("bound: pos=%d, h=%d\n", bound.Pos, bound.H)

	c.Append(248)
	c.Append(305)

	fmt.Printf("pos: %d\n", c.pos)
	fmt.Printf("%d\n", buf.Chunks()[0])

	d := NewReverseInstantDeltaDecompressor(buf, c.Size(), fracDigits)
	d.RestoreFromEnd()

	for range 8 {
		value, done = d.NextValue()
		fmt.Println(value, done)
	}

	boundDecompressor := NewReverseInstantDeltaDecompressor(buf, c.Size(), fracDigits)
	//boundDecompressor.RestoreFromBound(bound)

	fmt.Println("from bound:")
	for range 8 {
		value, done = boundDecompressor.NextValue()
		fmt.Println(value, done)
	}
}

func TestInsdeltaBound2(t *testing.T) {
	var (
		fracDigits byte = 0
		buf             = make([]byte, minBufferSize)
		value      float64
		done       bool
	)
	c := NewReverseInstantDeltaCompressor(buf, 0, fracDigits)
	// c.Append(1.55)
	// c.Append(23)
	// c.Append(23)
	// c.Append(23)
	// c.Append(23.5)
	c.Append(305)
	c.Append(248)

	c.Append(191)

	// fmt.Printf("pos: %d\n", c.pos)
	// fmt.Printf("%d\n", buf.Chunks()[0])

	c.Append(191)

	// fmt.Printf("pos: %d\n", c.pos)
	// fmt.Printf("%d\n", buf.Chunks()[0])

	c.Append(130)

	fmt.Printf("pos: %d\n", c.pos)
	fmt.Printf("%d\n", buf.Chunks()[0])
	//////////////////////////

	//bound := c.GetState()

	//fmt.Printf("bound: pos=%d, h=%d\n", bound.Pos, bound.H)

	c.Append(70)
	c.Append(10)

	fmt.Printf("pos: %d\n", c.pos)
	fmt.Printf("%d\n", buf.Chunks()[0])

	d := NewReverseInstantDeltaDecompressor(buf, c.Size(), fracDigits)
	d.RestoreFromEnd()

	for range 8 {
		value, done = d.NextValue()
		fmt.Println(value, done)
	}

	boundDecompressor := NewReverseInstantDeltaDecompressor(buf, c.Size(), fracDigits)
	//sboundDecompressor.RestoreFromBound(bound)

	fmt.Println("from bound:")
	for range 8 {
		value, done = boundDecompressor.NextValue()
		fmt.Println(value, done)
	}
}

func TestCap(t *testing.T) {
	a := make([]byte, 0, 10)
	fmt.Println("len:", len(a))
	fmt.Println("cap:", cap(a))

	a = append(a, 1)
	fmt.Println("after append:")
	fmt.Println("len:", len(a))
	fmt.Println("cap:", cap(a))
	fmt.Println("a:", a)

	a[1] = 55
	fmt.Println("after []:")
	fmt.Println("len:", len(a))
	fmt.Println("cap:", cap(a))
	fmt.Println("a:", a)

	a = append(a, 2)
	fmt.Println("after 2nd append:")
	fmt.Println("len:", len(a))
	fmt.Println("cap:", cap(a))
	fmt.Println("a:", a)
}