mirror of
https://github.com/optim-enterprises-bv/kubernetes.git
synced 2025-11-04 04:08:16 +00:00
86 lines
2.1 KiB
Go
86 lines
2.1 KiB
Go
/*
|
|
Copyright 2015 The Kubernetes 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 resource
|
|
|
|
import (
|
|
"math"
|
|
"math/big"
|
|
"testing"
|
|
)
|
|
|
|
func TestScaledValueInternal(t *testing.T) {
|
|
tests := []struct {
|
|
unscaled *big.Int
|
|
scale int
|
|
newScale int
|
|
|
|
want int64
|
|
}{
|
|
// remain scale
|
|
{big.NewInt(1000), 0, 0, 1000},
|
|
|
|
// scale down
|
|
{big.NewInt(1000), 0, -3, 1},
|
|
{big.NewInt(1000), 3, 0, 1},
|
|
{big.NewInt(0), 3, 0, 0},
|
|
|
|
// always round up
|
|
{big.NewInt(999), 3, 0, 1},
|
|
{big.NewInt(500), 3, 0, 1},
|
|
{big.NewInt(499), 3, 0, 1},
|
|
{big.NewInt(1), 3, 0, 1},
|
|
// large scaled value does not lose precision
|
|
{big.NewInt(0).Sub(maxInt64, bigOne), 1, 0, (math.MaxInt64-1)/10 + 1},
|
|
// large intermidiate result.
|
|
{big.NewInt(1).Exp(big.NewInt(10), big.NewInt(100), nil), 100, 0, 1},
|
|
|
|
// scale up
|
|
{big.NewInt(0), 0, 3, 0},
|
|
{big.NewInt(1), 0, 3, 1000},
|
|
{big.NewInt(1), -3, 0, 1000},
|
|
{big.NewInt(1000), -3, 2, 100000000},
|
|
{big.NewInt(0).Div(big.NewInt(math.MaxInt64), bigThousand), 0, 3,
|
|
(math.MaxInt64 / 1000) * 1000},
|
|
}
|
|
|
|
for i, tt := range tests {
|
|
old := (&big.Int{}).Set(tt.unscaled)
|
|
got := scaledValue(tt.unscaled, tt.scale, tt.newScale)
|
|
if got != tt.want {
|
|
t.Errorf("#%d: got = %v, want %v", i, got, tt.want)
|
|
}
|
|
if tt.unscaled.Cmp(old) != 0 {
|
|
t.Errorf("#%d: unscaled = %v, want %v", i, tt.unscaled, old)
|
|
}
|
|
}
|
|
}
|
|
|
|
func BenchmarkScaledValueSmall(b *testing.B) {
|
|
s := big.NewInt(1000)
|
|
for i := 0; i < b.N; i++ {
|
|
scaledValue(s, 3, 0)
|
|
}
|
|
}
|
|
|
|
func BenchmarkScaledValueLarge(b *testing.B) {
|
|
s := big.NewInt(math.MaxInt64)
|
|
s.Mul(s, big.NewInt(1000))
|
|
for i := 0; i < b.N; i++ {
|
|
scaledValue(s, 10, 0)
|
|
}
|
|
}
|