func Test_FloatEncoder_Quick(t *testing.T) {
quick.Check(func(values []float64) bool {
// Write values to encoder.
enc := tsm1.NewFloatEncoder()
for _, v := range values {
enc.Push(v)
}
enc.Finish()
// Read values out of decoder.
got := make([]float64, 0, len(values))
b, err := enc.Bytes()
if err != nil {
t.Fatalf("unexpected error: %v", err)
}
dec, err := tsm1.NewFloatDecoder(b)
if err != nil {
t.Fatal(err)
}
for dec.Next() {
got = append(got, dec.Values())
}
// Verify that input and output values match.
if !reflect.DeepEqual(values, got) {
t.Fatalf("mismatch:\n\nexp=%+v\n\ngot=%+v\n\n", values, got)
}
return true
}, nil)
}
func TestFloatEncoder_Roundtrip(t *testing.T) {
s := tsm1.NewFloatEncoder()
for _, p := range TwoHoursData {
s.Push(p.v)
}
s.Finish()
b := s.Bytes()
it, err := tsm1.NewFloatDecoder(b)
if err != nil {
t.Fatalf("unexpected error creating float decoder: %v", err)
}
for _, w := range TwoHoursData {
if !it.Next() {
t.Fatalf("Next()=false, want true")
}
vv := it.Values()
// t.Logf("it.Values()=(%+v, %+v)\n", time.Unix(int64(tt), 0), vv)
if w.v != vv {
t.Errorf("Values()=(%v), want (%v)\n", vv, w.v)
}
}
if it.Next() {
t.Fatalf("Next()=true, want false")
}
if err := it.Error(); err != nil {
t.Errorf("it.Error()=%v, want nil", err)
}
}
func TestFloatEncoder_Simple(t *testing.T) {
// Example from the paper
s := tsm1.NewFloatEncoder()
s.Push(12)
s.Push(12)
s.Push(24)
// extra tests
// floating point masking/shifting bug
s.Push(13)
s.Push(24)
// delta-of-delta sizes
s.Push(24)
s.Push(24)
s.Push(24)
s.Finish()
b := s.Bytes()
it, err := tsm1.NewFloatDecoder(b)
if err != nil {
t.Fatalf("unexpected error creating float decoder: %v", err)
}
want := []float64{
12,
12,
24,
13,
24,
24,
24,
24,
}
for _, w := range want {
if !it.Next() {
t.Fatalf("Next()=false, want true")
}
vv := it.Values()
if w != vv {
t.Errorf("Values()=(%v), want (%v)\n", vv, w)
}
}
if it.Next() {
t.Fatalf("Next()=true, want false")
}
if err := it.Error(); err != nil {
t.Errorf("it.Error()=%v, want nil", err)
}
}
func BenchmarkFloatEncoder(b *testing.B) {
for i := 0; i < b.N; i++ {
s := tsm1.NewFloatEncoder()
for _, tt := range TwoHoursData {
s.Push(tt.v)
}
s.Finish()
}
}
func TestFloatEncoder_Roundtrip_NaN(t *testing.T) {
s := tsm1.NewFloatEncoder()
s.Push(1.0)
s.Push(math.NaN())
s.Push(2.0)
s.Finish()
_, err := s.Bytes()
if err == nil {
t.Fatalf("expected error. got nil")
}
}
func TestFloatEncoder_SimilarFloats(t *testing.T) {
s := tsm1.NewFloatEncoder()
want := []float64{
6.00065e+06,
6.000656e+06,
6.000657e+06,
6.000659e+06,
6.000661e+06,
}
for _, v := range want {
s.Push(v)
}
s.Finish()
b, err := s.Bytes()
if err != nil {
t.Fatalf("unexpected error: %v", err)
}
it, err := tsm1.NewFloatDecoder(b)
if err != nil {
t.Fatalf("unexpected error creating float decoder: %v", err)
}
for _, w := range want {
if !it.Next() {
t.Fatalf("Next()=false, want true")
}
vv := it.Values()
if w != vv {
t.Errorf("Values()=(%v), want (%v)\n", vv, w)
}
}
if it.Next() {
t.Fatalf("Next()=true, want false")
}
if err := it.Error(); err != nil {
t.Errorf("it.Error()=%v, want nil", err)
}
}
func BenchmarkFloatDecoder(b *testing.B) {
s := tsm1.NewFloatEncoder()
for _, tt := range TwoHoursData {
s.Push(tt.v)
}
s.Finish()
bytes := s.Bytes()
b.ResetTimer()
for i := 0; i < b.N; i++ {
it, err := tsm1.NewFloatDecoder(bytes)
if err != nil {
b.Fatalf("unexpected error creating float decoder: %v", err)
}
for j := 0; j < len(TwoHoursData); it.Next() {
j++
}
}
}