mirror of https://github.com/k3s-io/k3s
87 lines
2.0 KiB
Go
87 lines
2.0 KiB
Go
/*
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Copyright 2015 The Kubernetes Authors All rights reserved.
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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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http://www.apache.org/licenses/LICENSE-2.0
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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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*/
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package rand
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import (
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"math/rand"
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"reflect"
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"sort"
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"strings"
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"testing"
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)
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func TestString(t *testing.T) {
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valid := "0123456789abcdefghijklmnopqrstuvwxyz"
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for _, l := range []int{0, 1, 2, 10, 123} {
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s := String(l)
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if len(s) != l {
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t.Errorf("expected string of size %d, got %q", l, s)
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}
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for _, c := range s {
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if !strings.ContainsRune(valid, c) {
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t.Errorf("expected valid charaters, got %v", c)
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}
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}
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}
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}
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// Confirm that panic occurs on invalid input.
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func TestRangePanic(t *testing.T) {
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defer func() {
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if err := recover(); err == nil {
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t.Errorf("Panic didn't occur!")
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}
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}()
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// Should result in an error...
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Intn(0)
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}
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func TestIntn(t *testing.T) {
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// 0 is invalid.
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for _, max := range []int{1, 2, 10, 123} {
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inrange := Intn(max)
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if inrange < 0 || inrange > max {
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t.Errorf("%v out of range (0,%v)", inrange, max)
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}
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}
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}
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func TestPerm(t *testing.T) {
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Seed(5)
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rand.Seed(5)
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for i := 1; i < 20; i++ {
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actual := Perm(i)
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expected := rand.Perm(i)
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for j := 0; j < i; j++ {
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if actual[j] != expected[j] {
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t.Errorf("Perm call result is unexpected")
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}
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}
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}
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}
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func TestShuffle(t *testing.T) {
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Seed(5) // Arbitrary RNG seed for deterministic testing.
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have := []int{0, 1, 2, 3, 4}
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want := []int{3, 2, 4, 1, 0} // "have" shuffled, with RNG at Seed(5).
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got := append([]int{}, have...)
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Shuffle(sort.IntSlice(got))
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if !reflect.DeepEqual(got, want) {
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t.Errorf("Shuffle(%v) => %v, want %v", have, got, want)
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}
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}
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