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7093b089f2
This adds bit buckets for larger numbers to varbit encoding and also an unsigned version of varbit encoding. Then, varbit encoding is used for all the histogram chunk data instead of varint. Signed-off-by: beorn7 <beorn@grafana.com>
86 lines
1.7 KiB
Go
86 lines
1.7 KiB
Go
// Copyright 2021 The Prometheus Authors
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package chunkenc
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import (
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"math"
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"testing"
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"github.com/stretchr/testify/require"
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)
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func TestVarbitInt(t *testing.T) {
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numbers := []int64{
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math.MinInt64,
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-36028797018963968, -36028797018963967,
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-16777216, -16777215,
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-131072, -131071,
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-2048, -2047,
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-256, -255,
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-32, -31,
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-4, -3,
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-1, 0, 1,
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4, 5,
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32, 33,
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256, 257,
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2048, 2049,
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131072, 131073,
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16777216, 16777217,
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36028797018963968, 36028797018963969,
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math.MaxInt64,
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}
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bs := bstream{}
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for _, n := range numbers {
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putVarbitInt(&bs, n)
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}
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bsr := newBReader(bs.bytes())
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for _, want := range numbers {
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got, err := readVarbitInt(&bsr)
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require.NoError(t, err)
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require.Equal(t, want, got)
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}
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}
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func TestVarbitUint(t *testing.T) {
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numbers := []uint64{
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0, 1,
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7, 8,
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63, 64,
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511, 512,
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4095, 4096,
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262143, 262144,
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33554431, 33554432,
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72057594037927935, 72057594037927936,
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math.MaxUint64,
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}
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bs := bstream{}
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for _, n := range numbers {
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putVarbitUint(&bs, n)
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}
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bsr := newBReader(bs.bytes())
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for _, want := range numbers {
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got, err := readVarbitUint(&bsr)
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require.NoError(t, err)
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require.Equal(t, want, got)
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}
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}
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