pkg/scheduler/scheduler_test.go

/*
Copyright 2014 Google Inc. All rights reserved.

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

    http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/

package scheduler

import (
	"testing"

	"github.com/GoogleCloudPlatform/kubernetes/pkg/api"
)

// Some functions used by multiple scheduler tests.

type schedulerTester struct {
	t            *testing.T
	scheduler    Scheduler
	minionLister MinionLister
}

// Call if you know exactly where pod should get scheduled.
func (st *schedulerTester) expectSchedule(pod api.Pod, expected string) {
	actual, err := st.scheduler.Schedule(pod, st.minionLister)
	if err != nil {
		st.t.Errorf("Unexpected error %v\nTried to scheduler: %#v", err, pod)
		return
	}
	if actual != expected {
		st.t.Errorf("Unexpected scheduling value: %v, expected %v", actual, expected)
	}
}

// Call if you can't predict where pod will be scheduled.
func (st *schedulerTester) expectSuccess(pod api.Pod) {
	_, err := st.scheduler.Schedule(pod, st.minionLister)
	if err != nil {
		st.t.Errorf("Unexpected error %v\nTried to scheduler: %#v", err, pod)
		return
	}
}

// Call if pod should *not* schedule.
func (st *schedulerTester) expectFailure(pod api.Pod) {
	_, err := st.scheduler.Schedule(pod, st.minionLister)
	if err == nil {
		st.t.Error("Unexpected non-error")
	}
}

func newPod(host string, hostPorts ...int) api.Pod {
	networkPorts := []api.ContainerPort{}
	for _, port := range hostPorts {
		networkPorts = append(networkPorts, api.ContainerPort{HostPort: port})
	}
	return api.Pod{
		Status: api.PodStatus{
			Host: host,
		},
		Spec: api.PodSpec{
			Containers: []api.Container{
				{
					Ports: networkPorts,
				},
			},
		},
	}
}