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// _ _
// __ _____ __ ___ ___ __ _| |_ ___
// \ \ /\ / / _ \/ _` \ \ / / |/ _` | __/ _ \
// \ V V / __/ (_| |\ V /| | (_| | || __/
// \_/\_/ \___|\__,_| \_/ |_|\__,_|\__\___|
//
// Copyright © 2016 - 2024 Weaviate B.V. All rights reserved.
//
// CONTACT: hello@weaviate.io
//
//go:build !race
package compressionhelpers_test
import (
"math"
"math/rand"
"testing"
"github.com/stretchr/testify/assert"
"github.com/weaviate/weaviate/adapters/repos/db/vector/compressionhelpers"
)
func Test_NoRaceTileEncoderEncode(t *testing.T) {
encoder := compressionhelpers.NewTileEncoder(4, 0, compressionhelpers.LogNormalEncoderDistribution)
for i := 0; i < 1000000; i++ {
encoder.Add([]float32{float32(rand.NormFloat64() + 100)})
}
encoder.Fit([][]float32{})
assert.Equal(t, encoder.Encode([]float32{0.1}), byte(0))
assert.Equal(t, encoder.Encode([]float32{100}), byte(8))
assert.Equal(t, encoder.Encode([]float32{1000}), byte(16))
}
func Test_NoRaceTileEncoderCentroids(t *testing.T) {
encoder := compressionhelpers.NewTileEncoder(4, 0, compressionhelpers.LogNormalEncoderDistribution)
for i := 0; i < 1000000; i++ {
encoder.Add([]float32{float32(rand.NormFloat64() + 100)})
}
encoder.Fit([][]float32{})
assert.Equal(t, math.Round(float64(encoder.Centroid(0)[0])), 98.0)
assert.Equal(t, math.Round(float64(encoder.Centroid(2)[0])), 99.0)
assert.Equal(t, math.Round(float64(encoder.Centroid(14)[0])), 101.0)
}
func Test_NoRaceNormalTileEncoderEncode(t *testing.T) {
encoder := compressionhelpers.NewTileEncoder(4, 0, compressionhelpers.NormalEncoderDistribution)
for i := 0; i < 1000000; i++ {
encoder.Add([]float32{float32(rand.NormFloat64())})
}
encoder.Fit([][]float32{})
assert.Equal(t, encoder.Encode([]float32{0.1}), byte(8))
assert.Equal(t, encoder.Encode([]float32{100}), byte(16))
assert.Equal(t, encoder.Encode([]float32{1000}), byte(16))
}
func Test_NoRaceNormalTileEncoderCentroids(t *testing.T) {
encoder := compressionhelpers.NewTileEncoder(4, 0, compressionhelpers.NormalEncoderDistribution)
for i := 0; i < 1000000; i++ {
encoder.Add([]float32{float32(rand.NormFloat64())})
}
encoder.Fit([][]float32{})
assert.Equal(t, math.Round(float64(encoder.Centroid(0)[0])), -2.0)
assert.Equal(t, math.Round(float64(encoder.Centroid(8)[0])), 0.0)
assert.Equal(t, math.Round(float64(encoder.Centroid(15)[0])), 2.0)
}
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