mirror of
https://github.com/prometheus/prometheus.git
synced 2024-11-14 01:24:04 -08:00
53 lines
1.5 KiB
Go
53 lines
1.5 KiB
Go
|
// Copyright 2016 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 local
|
||
|
|
|
||
|
|
import "testing"
|
||
|
|
|
||
|
|
func TestCountBits(t *testing.T) {
|
||
|
|
for i := byte(0); i < 56; i++ {
|
||
|
|
for j := byte(0); j <= 8; j++ {
|
||
|
|
for k := byte(0); k < 8; k++ {
|
||
|
|
p := uint64(bitMask[j][k]) << i
|
||
|
|
gotLeading, gotSignificant := countBits(p)
|
||
|
|
wantLeading := 56 - i + k
|
||
|
|
wantSignificant := j
|
||
|
|
if j+k > 8 {
|
||
|
|
wantSignificant -= j + k - 8
|
||
|
|
}
|
||
|
|
if wantLeading > 31 {
|
||
|
|
wantSignificant += wantLeading - 31
|
||
|
|
wantLeading = 31
|
||
|
|
}
|
||
|
|
if p == 0 {
|
||
|
|
wantLeading = 0
|
||
|
|
wantSignificant = 0
|
||
|
|
}
|
||
|
|
if wantLeading != gotLeading {
|
||
|
|
t.Errorf(
|
||
|
|
"unexpected leading bit count for i=%d, j=%d, k=%d; want %d, got %d",
|
||
|
|
i, j, k, wantLeading, gotLeading,
|
||
|
|
)
|
||
|
|
}
|
||
|
|
if wantSignificant != gotSignificant {
|
||
|
|
t.Errorf(
|
||
|
|
"unexpected significant bit count for i=%d, j=%d, k=%d; want %d, got %d",
|
||
|
|
i, j, k, wantSignificant, gotSignificant,
|
||
|
|
)
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|