k8s.io/kubernetes@v1.31.0-alpha.0.0.20240520171757-56147500dadc/pkg/registry/core/service/portallocator/operation_test.go (about)

     1  /*
     2  Copyright 2018 The Kubernetes Authors.
     3  
     4  Licensed under the Apache License, Version 2.0 (the "License");
     5  you may not use this file except in compliance with the License.
     6  You may obtain a copy of the License at
     7  
     8      http://www.apache.org/licenses/LICENSE-2.0
     9  
    10  Unless required by applicable law or agreed to in writing, software
    11  distributed under the License is distributed on an "AS IS" BASIS,
    12  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    13  See the License for the specific language governing permissions and
    14  limitations under the License.
    15  */
    16  
    17  package portallocator
    18  
    19  import (
    20  	"testing"
    21  
    22  	"k8s.io/apimachinery/pkg/util/net"
    23  )
    24  
    25  // TestDryRunAllocate tests the Allocate function in dry run mode
    26  func TestDryRunAllocate(t *testing.T) {
    27  	pr, err := net.ParsePortRange("10000-10200")
    28  	if err != nil {
    29  		t.Fatal(err)
    30  	}
    31  
    32  	// Allocate some ports before calling
    33  	previouslyAllocated := []int{10000, 10010, 10020}
    34  	r, err := NewInMemory(*pr)
    35  	if err != nil {
    36  		t.Fatal(err)
    37  	}
    38  	for _, port := range previouslyAllocated {
    39  		_ = r.Allocate(port)
    40  	}
    41  	freeAtStart := r.Free()
    42  
    43  	// Do some allocations with a dry run operation
    44  	toAllocate := []int{
    45  		10000,
    46  		10030,
    47  		10030,
    48  		10040,
    49  	}
    50  	expectedErrors := []error{
    51  		ErrAllocated,
    52  		nil,
    53  		ErrAllocated,
    54  		nil,
    55  	}
    56  	op := StartOperation(r, true)
    57  	for i, port := range toAllocate {
    58  		err := op.Allocate(port)
    59  		if err != expectedErrors[i] {
    60  			t.Errorf("%v: expected error %v but got %v", i, expectedErrors[i], err)
    61  		}
    62  	}
    63  
    64  	// Make sure no port allocations were actually made by the dry run
    65  	freeAtEnd := r.Free()
    66  	if freeAtStart != freeAtEnd {
    67  		t.Errorf("expected %v free ports but got %v", freeAtStart, freeAtEnd)
    68  	}
    69  }
    70  
    71  // TestDryRunAllocateNext tests the AllocateNext function in dry run mode
    72  func TestDryRunAllocateNext(t *testing.T) {
    73  	pr, err := net.ParsePortRange("10000-10200")
    74  	if err != nil {
    75  		t.Fatal(err)
    76  	}
    77  
    78  	// Allocate some ports before calling
    79  	previouslyAllocated := []int{10000, 10010, 10020}
    80  	r, err := NewInMemory(*pr)
    81  	if err != nil {
    82  		t.Fatal(err)
    83  	}
    84  	for _, port := range previouslyAllocated {
    85  		_ = r.Allocate(port)
    86  	}
    87  	freeAtStart := r.Free()
    88  
    89  	// AllocateNext without a previously unused dry run operation
    90  	op := StartOperation(r, true)
    91  	port, err := op.AllocateNext()
    92  	if port == 0 {
    93  		t.Errorf("expected non zero port but got: %v", port)
    94  	}
    95  	if err != nil {
    96  		t.Errorf("expected no error but got: %v", err)
    97  	}
    98  
    99  	// Try to allocate the returned port using the same operation
   100  	if e, a := ErrAllocated, op.Allocate(port); e != a {
   101  		t.Errorf("expected %v but got: %v", e, a)
   102  	}
   103  
   104  	// AllocateNext with a previously used dry run operation
   105  	op = StartOperation(r, true)
   106  	_ = op.Allocate(12345)
   107  	port, err = op.AllocateNext()
   108  	if port == 0 {
   109  		t.Errorf("expected non zero port but got: %v", port)
   110  	}
   111  	if port == 12345 {
   112  		t.Errorf("expected port not to be 12345 but got %v", port)
   113  	}
   114  	if err != nil {
   115  		t.Errorf("expected no error but got: %v", err)
   116  	}
   117  
   118  	// Make sure no port allocations were actually made by the dry run
   119  	freeAtEnd := r.Free()
   120  	if freeAtStart != freeAtEnd {
   121  		t.Errorf("expected %v free ports but got %v", freeAtStart, freeAtEnd)
   122  	}
   123  }