mirror of
https://github.com/k3s-io/kubernetes.git
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102 lines
2.3 KiB
Go
102 lines
2.3 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 userspace
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import (
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"reflect"
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"testing"
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"k8s.io/kubernetes/pkg/util/net"
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)
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func TestRangeAllocatorEmpty(t *testing.T) {
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r := &net.PortRange{}
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r.Set("0-0")
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defer func() {
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if rv := recover(); rv == nil {
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t.Fatalf("expected panic because of empty port range: %+v", r)
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}
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}()
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_ = newPortRangeAllocator(*r)
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}
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func TestRangeAllocatorFullyAllocated(t *testing.T) {
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r := &net.PortRange{}
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r.Set("1-1")
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a := newPortRangeAllocator(*r)
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p, err := a.AllocateNext()
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if err != nil {
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t.Fatalf("unexpected error: %v", err)
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}
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if p != 1 {
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t.Fatalf("unexpected allocated port: %d", p)
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}
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_, err = a.AllocateNext()
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if err == nil {
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t.Fatalf("expected error because of fully-allocated range")
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}
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a.Release(p)
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p, err = a.AllocateNext()
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if err != nil {
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t.Fatalf("unexpected error: %v", err)
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}
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if p != 1 {
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t.Fatalf("unexpected allocated port: %d", p)
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}
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_, err = a.AllocateNext()
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if err == nil {
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t.Fatalf("expected error because of fully-allocated range")
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}
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}
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func TestRangeAllocator_RandomishAllocation(t *testing.T) {
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r := &net.PortRange{}
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r.Set("1-100")
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a := newPortRangeAllocator(*r)
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// allocate all the ports
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var err error
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ports := make([]int, 100, 100)
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for i := 0; i < 100; i++ {
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ports[i], err = a.AllocateNext()
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if err != nil {
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t.Fatalf("unexpected error: %v", err)
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}
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}
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// release them all
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for i := 0; i < 100; i++ {
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a.Release(ports[i])
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}
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// allocate the ports again
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rports := make([]int, 100, 100)
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for i := 0; i < 100; i++ {
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rports[i], err = a.AllocateNext()
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if err != nil {
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t.Fatalf("unexpected error: %v", err)
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}
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}
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if reflect.DeepEqual(ports, rports) {
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t.Fatalf("expected re-allocated ports to be in a somewhat random order")
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}
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}
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