1/*
2Copyright 2019 The Kubernetes Authors.
3
4Licensed under the Apache License, Version 2.0 (the "License");
5you may not use this file except in compliance with the License.
6You may obtain a copy of the License at
7
8    http://www.apache.org/licenses/LICENSE-2.0
9
10Unless required by applicable law or agreed to in writing, software
11distributed under the License is distributed on an "AS IS" BASIS,
12WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13See the License for the specific language governing permissions and
14limitations under the License.
15*/
16
17package server
18
19import (
20	"testing"
21	"time"
22
23	"k8s.io/apimachinery/pkg/util/clock"
24)
25
26func TestDelayedHealthCheck(t *testing.T) {
27	t.Run("test that liveness check returns true until the delay has elapsed", func(t *testing.T) {
28		t0 := time.Unix(0, 0)
29		c := clock.NewFakeClock(t0)
30		doneCh := make(chan struct{})
31
32		healthCheck := delayedHealthCheck(postStartHookHealthz{"test", doneCh}, c, time.Duration(10)*time.Second)
33		err := healthCheck.Check(nil)
34		if err != nil {
35			t.Errorf("Got %v, expected no error", err)
36		}
37		c.Step(10 * time.Second)
38		err = healthCheck.Check(nil)
39		if err != nil {
40			t.Errorf("Got %v, expected no error", err)
41		}
42		c.Step(1 * time.Millisecond)
43		err = healthCheck.Check(nil)
44		if err == nil || err.Error() != "not finished" {
45			t.Errorf("Got '%v', but expected error to be 'not finished'", err)
46		}
47		close(doneCh)
48		err = healthCheck.Check(nil)
49		if err != nil {
50			t.Errorf("Got %v, expected no error", err)
51		}
52	})
53	t.Run("test that liveness check does not toggle false even if done channel is closed early", func(t *testing.T) {
54		t0 := time.Unix(0, 0)
55		c := clock.NewFakeClock(t0)
56
57		doneCh := make(chan struct{})
58
59		healthCheck := delayedHealthCheck(postStartHookHealthz{"test", doneCh}, c, time.Duration(10)*time.Second)
60		err := healthCheck.Check(nil)
61		if err != nil {
62			t.Errorf("Got %v, expected no error", err)
63		}
64		close(doneCh)
65		c.Step(10 * time.Second)
66		err = healthCheck.Check(nil)
67		if err != nil {
68			t.Errorf("Got %v, expected no error", err)
69		}
70		c.Step(1 * time.Millisecond)
71		err = healthCheck.Check(nil)
72		if err != nil {
73			t.Errorf("Got %v, expected no error", err)
74		}
75	})
76
77}
78