Function TestAppendFloat

msgp/write_bytes_test.go:138–183

(t *testing.T)

}

func TestAppendFloat(t *testing.T) {
	rng := rand.New(rand.NewSource(0))
	const n = 1e7
	src := make([]float64, n)
	for i := range src {
		// ~50% full float64, 50% converted from float32.
		if rng.Uint32()&1 == 1 {
			src[i] = rng.NormFloat64()
		} else {
			src[i] = float64(math.MaxFloat32 * (0.5 - rng.Float32()))
		}
	}

	var buf bytes.Buffer
	en := NewWriter(&buf)

	var bts []byte
	for _, f := range src {
		en.WriteFloat(f)
		bts = AppendFloat(bts, f)
	}
	en.Flush()
	if buf.Len() != len(bts) {
		t.Errorf("encoder wrote %d; append wrote %d bytes", buf.Len(), len(bts))
	}
	t.Logf("%f bytes/value", float64(buf.Len())/n)
	a, b := bts, buf.Bytes()
	for i := range a {
		if a[i] != b[i] {
			t.Errorf("mismatch at byte %d, %d != %d", i, a[i], b[i])
			break
		}
	}

	for i, want := range src {
		var got float64
		var err error
		got, a, err = ReadFloat64Bytes(a)
		if err != nil {
			t.Fatal(err)
		}
		if want != got {
			t.Errorf("value #%d: want %v; got %v", i, want, got)
		}
	}
}

func BenchmarkAppendFloat(b *testing.B) {
	rng := rand.New(rand.NewSource(0))