mirror of
https://github.com/prometheus/prometheus.git
synced 2024-12-26 06:04:05 -08:00
75 lines
1.8 KiB
Go
75 lines
1.8 KiB
Go
// Copyright 2020 The Prometheus Authors
|
|
// Licensed under the Apache License, Version 2.0 (the "License");
|
|
// you may not use this file except in compliance with the License.
|
|
// You may obtain a copy of the License at
|
|
//
|
|
// http://www.apache.org/licenses/LICENSE-2.0
|
|
//
|
|
// Unless required by applicable law or agreed to in writing, software
|
|
// distributed under the License is distributed on an "AS IS" BASIS,
|
|
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
// See the License for the specific language governing permissions and
|
|
// limitations under the License.
|
|
|
|
package chunkenc
|
|
|
|
import (
|
|
"testing"
|
|
|
|
"github.com/stretchr/testify/require"
|
|
)
|
|
|
|
func TestBstream_Reset(t *testing.T) {
|
|
bs := bstream{
|
|
stream: []byte("test"),
|
|
count: 10,
|
|
}
|
|
bs.Reset([]byte("was reset"))
|
|
|
|
require.Equal(t, bstream{
|
|
stream: []byte("was reset"),
|
|
count: 0,
|
|
}, bs)
|
|
}
|
|
|
|
func TestBstreamReader(t *testing.T) {
|
|
// Write to the bit stream.
|
|
w := bstream{}
|
|
for _, bit := range []bit{true, false} {
|
|
w.writeBit(bit)
|
|
}
|
|
for nbits := 1; nbits <= 64; nbits++ {
|
|
w.writeBits(uint64(nbits), nbits)
|
|
}
|
|
for v := 1; v < 10000; v += 123 {
|
|
w.writeBits(uint64(v), 29)
|
|
}
|
|
|
|
// Read back.
|
|
r := newBReader(w.bytes())
|
|
for _, bit := range []bit{true, false} {
|
|
v, err := r.readBitFast()
|
|
if err != nil {
|
|
v, err = r.readBit()
|
|
}
|
|
require.NoError(t, err)
|
|
require.Equal(t, bit, v)
|
|
}
|
|
for nbits := uint8(1); nbits <= 64; nbits++ {
|
|
v, err := r.readBitsFast(nbits)
|
|
if err != nil {
|
|
v, err = r.readBits(nbits)
|
|
}
|
|
require.NoError(t, err)
|
|
require.Equal(t, uint64(nbits), v, "nbits=%d", nbits)
|
|
}
|
|
for v := 1; v < 10000; v += 123 {
|
|
actual, err := r.readBitsFast(29)
|
|
if err != nil {
|
|
actual, err = r.readBits(29)
|
|
}
|
|
require.NoError(t, err)
|
|
require.Equal(t, uint64(v), actual, "v=%d", v)
|
|
}
|
|
}
|