306 lines
6.4 KiB
Go
306 lines
6.4 KiB
Go
package tsm1_test
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import (
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"bytes"
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"fmt"
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"math/rand"
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"reflect"
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"testing"
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"testing/quick"
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"github.com/google/go-cmp/cmp"
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"github.com/influxdata/influxdb/tsdb/tsm1"
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)
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func TestBooleanArrayEncodeAll_NoValues(t *testing.T) {
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b, err := tsm1.BooleanArrayEncodeAll(nil, nil)
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if err != nil {
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t.Fatalf("unexpected error: %v", err)
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}
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var dec tsm1.BooleanDecoder
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dec.SetBytes(b)
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if dec.Next() {
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t.Fatalf("unexpected next value: got true, exp false")
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}
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}
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func TestBooleanArrayEncodeAll_Single(t *testing.T) {
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src := []bool{true}
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b, err := tsm1.BooleanArrayEncodeAll(src, nil)
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if err != nil {
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t.Fatalf("unexpected error: %v", err)
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}
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var dec tsm1.BooleanDecoder
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dec.SetBytes(b)
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if !dec.Next() {
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t.Fatalf("unexpected next value: got false, exp true")
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}
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if src[0] != dec.Read() {
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t.Fatalf("unexpected value: got %v, exp %v", dec.Read(), src[0])
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}
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}
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func TestBooleanArrayEncodeAll_Compare(t *testing.T) {
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// generate random values
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input := make([]bool, 1000)
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for i := 0; i < len(input); i++ {
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input[i] = rand.Int63n(2) == 1
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}
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s := tsm1.NewBooleanEncoder(1000)
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for _, v := range input {
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s.Write(v)
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}
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s.Flush()
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buf1, err := s.Bytes()
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if err != nil {
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t.Fatalf("unexpected error: %v", err)
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}
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buf2 := append([]byte("this is some jibberish"), make([]byte, 100, 200)...)
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buf2, err = tsm1.BooleanArrayEncodeAll(input, buf2)
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if err != nil {
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t.Fatalf("unexpected error: %v\nbuf: %db %x", err, len(buf2), buf2)
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}
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result, err := tsm1.BooleanArrayDecodeAll(buf2, nil)
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if err != nil {
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dumpBufs(buf1, buf2)
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t.Fatalf("unexpected error: %v\nbuf: %db %x", err, len(buf2), buf2)
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}
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if got, exp := result, input; !reflect.DeepEqual(got, exp) {
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dumpBufs(buf1, buf2)
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t.Fatalf("got result %v, expected %v", got, exp)
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}
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// Check that the encoders are byte for byte the same...
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if !bytes.Equal(buf1, buf2) {
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dumpBufs(buf1, buf2)
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t.Fatalf("Raw bytes differ for encoders")
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}
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}
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func TestBooleanArrayEncodeAll_Multi_Compressed(t *testing.T) {
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src := make([]bool, 10)
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for i := range src {
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src[i] = i%2 == 0
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}
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b, err := tsm1.BooleanArrayEncodeAll(src, nil)
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if err != nil {
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t.Fatalf("unexpected error: %v", err)
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}
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if exp := 4; len(b) != exp {
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t.Fatalf("unexpected length: got %v, exp %v", len(b), exp)
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}
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var dec tsm1.BooleanDecoder
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dec.SetBytes(b)
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for i, v := range src {
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if !dec.Next() {
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t.Fatalf("unexpected next value: got false, exp true")
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}
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if v != dec.Read() {
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t.Fatalf("unexpected value at pos %d: got %v, exp %v", i, dec.Read(), v)
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}
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}
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if dec.Next() {
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t.Fatalf("unexpected next value: got true, exp false")
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}
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}
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func TestBooleanArrayEncodeAll_Quick(t *testing.T) {
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if err := quick.Check(func(values []bool) bool {
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src := values
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if values == nil {
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src = []bool{}
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}
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// Retrieve compressed bytes.
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buf, err := tsm1.BooleanArrayEncodeAll(src, nil)
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if err != nil {
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t.Fatal(err)
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}
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// Read values out of decoder.
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got := make([]bool, 0, len(values))
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var dec tsm1.BooleanDecoder
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dec.SetBytes(buf)
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for dec.Next() {
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got = append(got, dec.Read())
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}
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// Verify that input and output values match.
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if !reflect.DeepEqual(src, got) {
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t.Fatalf("mismatch:\n\nexp=%#v\n\ngot=%#v\n\n", src, got)
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}
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return true
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}, nil); err != nil {
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t.Fatal(err)
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}
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}
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func Test_BooleanArrayDecodeAll_Single(t *testing.T) {
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enc := tsm1.NewBooleanEncoder(1)
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exp := true
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enc.Write(exp)
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b, err := enc.Bytes()
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if err != nil {
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t.Fatalf("unexpected error: %v", err)
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}
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got, _ := tsm1.BooleanArrayDecodeAll(b, nil)
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if len(got) != 1 {
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t.Fatalf("expected 1 value")
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}
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if got := got[0]; got != exp {
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t.Fatalf("unexpected value -got/+exp\n%s", cmp.Diff(got, exp))
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}
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}
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func Test_BooleanArrayDecodeAll_Multi_Compressed(t *testing.T) {
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cases := []struct {
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n int
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p float64 // probability of a true value
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}{
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{10, 0.33},
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{100, 0.55},
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{1000, 0.68},
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}
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for _, tc := range cases {
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t.Run(fmt.Sprintf("%d_%0.2f", tc.n, tc.p), func(t *testing.T) {
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rand.Seed(int64(tc.n * tc.n))
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enc := tsm1.NewBooleanEncoder(tc.n)
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values := make([]bool, tc.n)
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for i := range values {
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values[i] = rand.Float64() < tc.p
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enc.Write(values[i])
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}
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b, err := enc.Bytes()
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if err != nil {
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t.Fatalf("unexpected error: %v", err)
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}
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got, err := tsm1.BooleanArrayDecodeAll(b, nil)
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if err != nil {
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t.Fatalf("unexpected error %q", err.Error())
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}
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if !cmp.Equal(got, values) {
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t.Fatalf("unexpected values, -got/+exp\n%s", cmp.Diff(got, values))
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}
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})
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}
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}
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func Test_BooleanBatchDecoder_Corrupt(t *testing.T) {
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cases := []struct {
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name string
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d string
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}{
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{"empty", ""},
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{"invalid count", "\x10\x90"},
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{"count greater than remaining bits, multiple bytes expected", "\x10\x7f"},
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{"count greater than remaining bits, one byte expected", "\x10\x01"},
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}
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for _, c := range cases {
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t.Run(c.name, func(t *testing.T) {
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dst, _ := tsm1.BooleanArrayDecodeAll([]byte(c.d), nil)
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if len(dst) != 0 {
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t.Fatalf("unexpected result -got/+want\n%s", cmp.Diff(dst, nil))
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}
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})
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}
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}
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func BenchmarkEncodeBooleans(b *testing.B) {
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var err error
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cases := []int{10, 100, 1000}
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for _, n := range cases {
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enc := tsm1.NewBooleanEncoder(n)
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b.Run(fmt.Sprintf("%d_ran", n), func(b *testing.B) {
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input := make([]bool, n)
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for i := 0; i < n; i++ {
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input[i] = rand.Int63n(2) == 1
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}
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b.Run("itr", func(b *testing.B) {
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b.ReportAllocs()
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enc.Reset()
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b.ResetTimer()
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for n := 0; n < b.N; n++ {
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enc.Reset()
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for _, x := range input {
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enc.Write(x)
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}
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enc.Flush()
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if bufResult, err = enc.Bytes(); err != nil {
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b.Fatal(err)
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}
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}
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})
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b.Run("batch", func(b *testing.B) {
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b.ReportAllocs()
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b.ResetTimer()
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for n := 0; n < b.N; n++ {
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if bufResult, err = tsm1.BooleanArrayEncodeAll(input, bufResult); err != nil {
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b.Fatal(err)
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}
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}
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})
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})
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}
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}
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func BenchmarkBooleanArrayDecodeAll(b *testing.B) {
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benchmarks := []struct {
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n int
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}{
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{1},
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{55},
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{555},
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{1000},
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}
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for _, bm := range benchmarks {
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b.Run(fmt.Sprintf("%d", bm.n), func(b *testing.B) {
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size := bm.n
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e := tsm1.NewBooleanEncoder(size)
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for i := 0; i < size; i++ {
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e.Write(i&1 == 1)
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}
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bytes, err := e.Bytes()
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if err != nil {
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b.Fatalf("unexpected error: %v", err)
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}
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b.SetBytes(int64(len(bytes)))
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b.ResetTimer()
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dst := make([]bool, size)
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for i := 0; i < b.N; i++ {
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res, _ := tsm1.BooleanArrayDecodeAll(bytes, dst)
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if len(res) != size {
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b.Fatalf("expected to read %d booleans, but read %d", size, len(res))
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}
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}
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})
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}
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}
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