agones.dev/agones@v1.53.0/cmd/ping/udp_test.go (about)

     1  // Copyright 2018 Google LLC All Rights Reserved.
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //     http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  
    15  package main
    16  
    17  import (
    18  	"context"
    19  	"net"
    20  	"testing"
    21  	"time"
    22  
    23  	"github.com/stretchr/testify/assert"
    24  	"k8s.io/apimachinery/pkg/util/wait"
    25  	"k8s.io/utils/clock"
    26  	testclocks "k8s.io/utils/clock/testing"
    27  )
    28  
    29  type mockAddr struct {
    30  	addr string
    31  }
    32  
    33  func (m *mockAddr) Network() string {
    34  	return m.addr
    35  }
    36  
    37  func (m *mockAddr) String() string {
    38  	return m.addr
    39  }
    40  
    41  func TestUDPServerVisit(t *testing.T) {
    42  	t.Parallel()
    43  
    44  	fc := testclocks.NewFakeClock(time.Now())
    45  	u, err := defaultFixture(fc)
    46  	assert.Nil(t, err)
    47  	defer u.close()
    48  
    49  	// gate
    50  	assert.Empty(t, u.limits)
    51  
    52  	m := &mockAddr{addr: "[::1]:52998"}
    53  
    54  	u.rateLimitedEchoResponse([]byte{}, m)
    55  
    56  	// gate
    57  	assert.NotEmpty(t, u.limits)
    58  	assert.Len(t, u.limits, 1)
    59  	assert.Equal(t, fc.Now(), u.limits[m.Network()].stamp)
    60  
    61  	fc.Step(30 * time.Second)
    62  
    63  	u.rateLimitedEchoResponse([]byte{}, m)
    64  	assert.Len(t, u.limits, 1)
    65  	assert.Equal(t, fc.Now(), u.limits[m.Network()].stamp)
    66  
    67  	m = &mockAddr{addr: "[::1]:52999"}
    68  	u.rateLimitedEchoResponse([]byte{}, m)
    69  	assert.Len(t, u.limits, 2)
    70  	assert.Equal(t, fc.Now(), u.limits[m.Network()].stamp)
    71  }
    72  
    73  func TestUDPServerCleanup(t *testing.T) {
    74  	t.Parallel()
    75  
    76  	fc := testclocks.NewFakeClock(time.Now())
    77  	u, err := defaultFixture(fc)
    78  	assert.Nil(t, err)
    79  	defer u.close()
    80  
    81  	// gate
    82  	assert.Empty(t, u.limits)
    83  
    84  	m := &mockAddr{addr: "[::1]:52998"}
    85  	u.rateLimitedEchoResponse([]byte{}, m)
    86  
    87  	// gate
    88  	assert.NotEmpty(t, u.limits)
    89  
    90  	assert.Equal(t, u.clock.Now(), u.limits[m.String()].stamp)
    91  	fc.Step(10 * time.Second)
    92  	u.cleanUp()
    93  	assert.NotEmpty(t, u.limits)
    94  
    95  	fc.Step(time.Minute)
    96  	u.cleanUp()
    97  	assert.Empty(t, u.limits)
    98  }
    99  
   100  func TestUDPServerHealth(t *testing.T) {
   101  	t.Parallel()
   102  
   103  	fc := testclocks.NewFakeClock(time.Now())
   104  	u, err := defaultFixture(fc)
   105  	assert.Nil(t, err)
   106  	defer u.close()
   107  
   108  	assert.Error(t, u.Health())
   109  
   110  	ctx, cancel := context.WithCancel(context.Background())
   111  
   112  	u.run(ctx)
   113  	assert.NoError(t, u.Health())
   114  
   115  	cancel()
   116  
   117  	err = wait.PollUntilContextTimeout(context.Background(), time.Second, 5*time.Second, true, func(_ context.Context) (bool, error) {
   118  		return u.Health() != nil, nil
   119  	})
   120  
   121  	assert.Nil(t, err)
   122  }
   123  
   124  func defaultFixture(cl clock.WithTickerAndDelayedExecution) (*udpServer, error) {
   125  	u := newUDPServer(5)
   126  	u.clock = cl
   127  	var err error
   128  	u.conn, err = net.ListenPacket("udp", ":0")
   129  	return u, err
   130  }