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This commit is contained in:
deads2k
2017-01-16 09:50:37 -05:00
parent d2cbdbd7d4
commit 8686d67c80
29 changed files with 59 additions and 33 deletions
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10
pkg/util/rand/BUILD
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@@ -5,19 +5,11 @@ licenses(["notice"])
load(
"@io_bazel_rules_go//go:def.bzl",
"go_library",
"go_test",
)
go_library(
name = "go_default_library",
srcs = ["rand.go"],
tags = ["automanaged"],
)
go_test(
name = "go_default_test",
srcs = ["rand_test.go"],
library = ":go_default_library",
srcs = ["doc.go"],
tags = ["automanaged"],
)

21
pkg/util/rand/doc.go Normal file
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@@ -0,0 +1,21 @@
/*
Copyright 2017 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 rand needed for godep.
// TODO genericapiserver remove this empty package. Godep fails without this because heapster relies
// on this package. This will allow us to start splitting packages, but will force
// heapster to update on their next kube rebase.
package rand

85
pkg/util/rand/rand.go
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@@ -1,85 +0,0 @@
/*
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 rand provides utilities related to randomization.
package rand
import (
"math/rand"
"sync"
"time"
)
var rng = struct {
sync.Mutex
rand *rand.Rand
}{
rand: rand.New(rand.NewSource(time.Now().UTC().UnixNano())),
}
// Intn generates an integer in range [0,max).
// By design this should panic if input is invalid, <= 0.
func Intn(max int) int {
rng.Lock()
defer rng.Unlock()
return rng.rand.Intn(max)
}
// IntnRange generates an integer in range [min,max).
// By design this should panic if input is invalid, <= 0.
func IntnRange(min, max int) int {
rng.Lock()
defer rng.Unlock()
return rng.rand.Intn(max-min) + min
}
// IntnRange generates an int64 integer in range [min,max).
// By design this should panic if input is invalid, <= 0.
func Int63nRange(min, max int64) int64 {
rng.Lock()
defer rng.Unlock()
return rng.rand.Int63n(max-min) + min
}
// Seed seeds the rng with the provided seed.
func Seed(seed int64) {
rng.Lock()
defer rng.Unlock()
rng.rand = rand.New(rand.NewSource(seed))
}
// Perm returns, as a slice of n ints, a pseudo-random permutation of the integers [0,n)
// from the default Source.
func Perm(n int) []int {
rng.Lock()
defer rng.Unlock()
return rng.rand.Perm(n)
}
// We omit vowels from the set of available characters to reduce the chances
// of "bad words" being formed.
var alphanums = []rune("bcdfghjklmnpqrstvwxz0123456789")
// String generates a random alphanumeric string, without vowels, which is n
// characters long. This will panic if n is less than zero.
func String(length int) string {
b := make([]rune, length)
for i := range b {
b[i] = alphanums[Intn(len(alphanums))]
}
return string(b)
}

101
pkg/util/rand/rand_test.go
View File

@@ -1,101 +0,0 @@
/*
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 rand
import (
"math/rand"
"strings"
"testing"
)
const (
maxRangeTestCount = 500
)
func TestString(t *testing.T) {
valid := "0123456789abcdefghijklmnopqrstuvwxyz"
for _, l := range []int{0, 1, 2, 10, 123} {
s := String(l)
if len(s) != l {
t.Errorf("expected string of size %d, got %q", l, s)
}
for _, c := range s {
if !strings.ContainsRune(valid, c) {
t.Errorf("expected valid charaters, got %v", c)
}
}
}
}
// Confirm that panic occurs on invalid input.
func TestRangePanic(t *testing.T) {
defer func() {
if err := recover(); err == nil {
t.Errorf("Panic didn't occur!")
}
}()
// Should result in an error...
Intn(0)
}
func TestIntn(t *testing.T) {
// 0 is invalid.
for _, max := range []int{1, 2, 10, 123} {
inrange := Intn(max)
if inrange < 0 || inrange > max {
t.Errorf("%v out of range (0,%v)", inrange, max)
}
}
}
func TestPerm(t *testing.T) {
Seed(5)
rand.Seed(5)
for i := 1; i < 20; i++ {
actual := Perm(i)
expected := rand.Perm(i)
for j := 0; j < i; j++ {
if actual[j] != expected[j] {
t.Errorf("Perm call result is unexpected")
}
}
}
}
func TestIntnRange(t *testing.T) {
// 0 is invalid.
for min, max := range map[int]int{1: 2, 10: 123, 100: 500} {
for i := 0; i < maxRangeTestCount; i++ {
inrange := IntnRange(min, max)
if inrange < min || inrange >= max {
t.Errorf("%v out of range (%v,%v)", inrange, min, max)
}
}
}
}
func TestInt63nRange(t *testing.T) {
// 0 is invalid.
for min, max := range map[int64]int64{1: 2, 10: 123, 100: 500} {
for i := 0; i < maxRangeTestCount; i++ {
inrange := Int63nRange(min, max)
if inrange < min || inrange >= max {
t.Errorf("%v out of range (%v,%v)", inrange, min, max)
}
}
}
}

2
pkg/util/slice/BUILD
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@@ -12,7 +12,7 @@ go_library(
name = "go_default_library",
srcs = ["slice.go"],
tags = ["automanaged"],
deps = ["//pkg/util/rand:go_default_library"],
deps = ["//vendor:k8s.io/apimachinery/pkg/util/rand"],
)
go_test(

2
pkg/util/slice/slice.go
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@@ -20,7 +20,7 @@ package slice
import (
"sort"
utilrand "k8s.io/kubernetes/pkg/util/rand"
utilrand "k8s.io/apimachinery/pkg/util/rand"
)
// CopyStrings copies the contents of the specified string slice