1package monitor
2
3import (
4	"fmt"
5	"strings"
6	"testing"
7	"time"
8
9	log "github.com/hashicorp/go-hclog"
10	"github.com/stretchr/testify/require"
11)
12
13func TestMonitor_Start(t *testing.T) {
14	t.Parallel()
15
16	logger := log.NewInterceptLogger(&log.LoggerOptions{
17		Level: log.Error,
18	})
19
20	m, _ := NewMonitor(512, logger, &log.LoggerOptions{
21		Level: log.Debug,
22	})
23
24	logCh := m.Start()
25	defer m.Stop()
26
27	go func() {
28		logger.Debug("test log")
29		time.Sleep(10 * time.Millisecond)
30	}()
31
32	select {
33	case l := <-logCh:
34		require.Contains(t, string(l), "[DEBUG] test log")
35		return
36	case <-time.After(5 * time.Second):
37		t.Fatal("Expected to receive from log channel")
38	}
39}
40
41func TestMonitor_Start_Unbuffered(t *testing.T) {
42	t.Parallel()
43
44	logger := log.NewInterceptLogger(&log.LoggerOptions{
45		Level: log.Error,
46	})
47
48	_, err := NewMonitor(0, logger, &log.LoggerOptions{
49		Level: log.Debug,
50	})
51
52	if err == nil {
53		t.Fatal("expected to get an error, but didn't")
54	} else {
55		if !strings.Contains(err.Error(), "greater than zero") {
56			t.Fatal("expected an error about buf being greater than zero")
57		}
58	}
59}
60
61// Ensure number of dropped messages are logged
62func TestMonitor_DroppedMessages(t *testing.T) {
63	t.Parallel()
64
65	logger := log.NewInterceptLogger(&log.LoggerOptions{
66		Level: log.Warn,
67	})
68
69	m, _ := newMonitor(5, logger, &log.LoggerOptions{
70		Level: log.Debug,
71	})
72	m.dropCheckInterval = 5 * time.Millisecond
73
74	logCh := m.Start()
75	defer m.Stop()
76
77	for i := 0; i <= 100; i++ {
78		logger.Debug(fmt.Sprintf("test message %d", i))
79	}
80
81	passed := make(chan struct{})
82	go func() {
83		for recv := range logCh {
84			if strings.Contains(string(recv), "Monitor dropped") {
85				close(passed)
86				return
87			}
88		}
89	}()
90
91	select {
92	case <-passed:
93	case <-time.After(2 * time.Second):
94		require.Fail(t, "expected to see warn dropped messages")
95	}
96}
97