github.com/deemoprobe/k8s-first-commit@v0.0.0-20230430165612-a541f1982be3/pkg/registry/scheduler_test.go (about)

     1  /*
     2  Copyright 2014 Google Inc. All rights reserved.
     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  package registry
    17  
    18  import (
    19  	"math/rand"
    20  	"testing"
    21  
    22  	. "github.com/GoogleCloudPlatform/kubernetes/pkg/api"
    23  )
    24  
    25  func expectSchedule(scheduler Scheduler, task Task, expected string, t *testing.T) {
    26  	actual, err := scheduler.Schedule(task)
    27  	expectNoError(t, err)
    28  	if actual != expected {
    29  		t.Errorf("Unexpected scheduling value: %d, expected %d", actual, expected)
    30  	}
    31  }
    32  
    33  func TestRoundRobinScheduler(t *testing.T) {
    34  	scheduler := MakeRoundRobinScheduler([]string{"m1", "m2", "m3", "m4"})
    35  	expectSchedule(scheduler, Task{}, "m1", t)
    36  	expectSchedule(scheduler, Task{}, "m2", t)
    37  	expectSchedule(scheduler, Task{}, "m3", t)
    38  	expectSchedule(scheduler, Task{}, "m4", t)
    39  }
    40  
    41  func TestRandomScheduler(t *testing.T) {
    42  	random := rand.New(rand.NewSource(0))
    43  	scheduler := MakeRandomScheduler([]string{"m1", "m2", "m3", "m4"}, *random)
    44  	_, err := scheduler.Schedule(Task{})
    45  	expectNoError(t, err)
    46  }
    47  
    48  func TestFirstFitSchedulerNothingScheduled(t *testing.T) {
    49  	mockRegistry := MockTaskRegistry{}
    50  	scheduler := MakeFirstFitScheduler([]string{"m1", "m2", "m3"}, &mockRegistry)
    51  	expectSchedule(scheduler, Task{}, "m1", t)
    52  }
    53  
    54  func makeTask(host string, hostPorts ...int) Task {
    55  	networkPorts := []Port{}
    56  	for _, port := range hostPorts {
    57  		networkPorts = append(networkPorts, Port{HostPort: port})
    58  	}
    59  	return Task{
    60  		CurrentState: TaskState{
    61  			Host: host,
    62  		},
    63  		DesiredState: TaskState{
    64  			Manifest: ContainerManifest{
    65  				Containers: []Container{
    66  					Container{
    67  						Ports: networkPorts,
    68  					},
    69  				},
    70  			},
    71  		},
    72  	}
    73  }
    74  
    75  func TestFirstFitSchedulerFirstScheduled(t *testing.T) {
    76  	mockRegistry := MockTaskRegistry{
    77  		tasks: []Task{
    78  			makeTask("m1", 8080),
    79  		},
    80  	}
    81  	scheduler := MakeFirstFitScheduler([]string{"m1", "m2", "m3"}, &mockRegistry)
    82  	expectSchedule(scheduler, makeTask("", 8080), "m2", t)
    83  }
    84  
    85  func TestFirstFitSchedulerFirstScheduledComplicated(t *testing.T) {
    86  	mockRegistry := MockTaskRegistry{
    87  		tasks: []Task{
    88  			makeTask("m1", 80, 8080),
    89  			makeTask("m2", 8081, 8082, 8083),
    90  			makeTask("m3", 80, 443, 8085),
    91  		},
    92  	}
    93  	scheduler := MakeFirstFitScheduler([]string{"m1", "m2", "m3"}, &mockRegistry)
    94  	expectSchedule(scheduler, makeTask("", 8080, 8081), "m3", t)
    95  }
    96  
    97  func TestFirstFitSchedulerFirstScheduledImpossible(t *testing.T) {
    98  	mockRegistry := MockTaskRegistry{
    99  		tasks: []Task{
   100  			makeTask("m1", 8080),
   101  			makeTask("m2", 8081),
   102  			makeTask("m3", 8080),
   103  		},
   104  	}
   105  	scheduler := MakeFirstFitScheduler([]string{"m1", "m2", "m3"}, &mockRegistry)
   106  	_, err := scheduler.Schedule(makeTask("", 8080, 8081))
   107  	if err == nil {
   108  		t.Error("Unexpected non-error.")
   109  	}
   110  }