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alert_test.go
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alert_test.go
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// Copyright 2013 The Prometheus Authors
// 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
//
// https://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 model
import (
"fmt"
"sort"
"strings"
"testing"
"time"
)
func TestAlertValidate(t *testing.T) {
ts := time.Now()
cases := []struct {
alert *Alert
err string
}{
{
alert: &Alert{
Labels: LabelSet{"a": "b"},
StartsAt: ts,
},
},
{
alert: &Alert{
Labels: LabelSet{"a": "b"},
},
err: "start time missing",
},
{
alert: &Alert{
Labels: LabelSet{"a": "b"},
StartsAt: ts,
EndsAt: ts,
},
},
{
alert: &Alert{
Labels: LabelSet{"a": "b"},
StartsAt: ts,
EndsAt: ts.Add(1 * time.Minute),
},
},
{
alert: &Alert{
Labels: LabelSet{"a": "b"},
StartsAt: ts,
EndsAt: ts.Add(-1 * time.Minute),
},
err: "start time must be before end time",
},
{
alert: &Alert{
StartsAt: ts,
},
err: "at least one label pair required",
},
{
alert: &Alert{
Labels: LabelSet{"a": "b", "!bad": "label"},
StartsAt: ts,
},
err: "invalid label set: invalid name",
},
{
alert: &Alert{
Labels: LabelSet{"a": "b", "bad": "\xfflabel"},
StartsAt: ts,
},
err: "invalid label set: invalid value",
},
{
alert: &Alert{
Labels: LabelSet{"a": "b"},
Annotations: LabelSet{"!bad": "label"},
StartsAt: ts,
},
err: "invalid annotations: invalid name",
},
{
alert: &Alert{
Labels: LabelSet{"a": "b"},
Annotations: LabelSet{"bad": "\xfflabel"},
StartsAt: ts,
},
err: "invalid annotations: invalid value",
},
}
for i, c := range cases {
err := c.alert.Validate()
if err == nil {
if c.err == "" {
continue
}
t.Errorf("%d. Expected error %q but got none", i, c.err)
continue
}
if c.err == "" {
t.Errorf("%d. Expected no error but got %q", i, err)
continue
}
if !strings.Contains(err.Error(), c.err) {
t.Errorf("%d. Expected error to contain %q but got %q", i, c.err, err)
}
}
}
func TestAlert(t *testing.T) {
// Verifying that an alert with no EndsAt field is unresolved and has firing status.
alert := &Alert{
Labels: LabelSet{"foo": "bar", "lorem": "ipsum"},
StartsAt: time.Now(),
}
actual := fmt.Sprint(alert)
expected := "[d181d0f][active]"
if actual != expected {
t.Errorf("expected %s, but got %s", expected, actual)
}
actualStatus := alert.Status()
expectedStatus := AlertStatus("firing")
if actualStatus != expectedStatus {
t.Errorf("expected alertStatus %s, but got %s", expectedStatus, actualStatus)
}
// Verifying that an alert with an EndsAt time before the current time is resolved and has resolved status.
ts := time.Now()
ts1 := ts.Add(-2 * time.Minute)
ts2 := ts.Add(-1 * time.Minute)
alert = &Alert{
Labels: LabelSet{"foo": "bar", "lorem": "ipsum"},
StartsAt: ts1,
EndsAt: ts2,
}
if !alert.Resolved() {
t.Error("expected alert to be resolved, but it was not")
}
actual = fmt.Sprint(alert)
expected = "[d181d0f][resolved]"
if actual != expected {
t.Errorf("expected %s, but got %s", expected, actual)
}
actualStatus = alert.Status()
expectedStatus = "resolved"
if actualStatus != expectedStatus {
t.Errorf("expected alertStatus %s, but got %s", expectedStatus, actualStatus)
}
// Verifying that ResolvedAt works for different times
if alert.ResolvedAt(ts1) {
t.Error("unexpected alert was resolved at start time")
}
if alert.ResolvedAt(ts2.Add(-time.Millisecond)) {
t.Error("unexpected alert was resolved before it ended")
}
if !alert.ResolvedAt(ts2) {
t.Error("expected alert to be resolved at end time")
}
if !alert.ResolvedAt(ts2.Add(time.Millisecond)) {
t.Error("expected alert to be resolved after it ended")
}
// Verifying that StatusAt works for different times
actualStatus = alert.StatusAt(ts1)
if actualStatus != "firing" {
t.Errorf("expected alert to be firing at start time, but got %s", actualStatus)
}
actualStatus = alert.StatusAt(ts1.Add(-time.Millisecond))
if actualStatus != "firing" {
t.Errorf("expected alert to be firing before it ended, but got %s", actualStatus)
}
actualStatus = alert.StatusAt(ts2)
if actualStatus != "resolved" {
t.Errorf("expected alert to be resolved at end time, but got %s", actualStatus)
}
actualStatus = alert.StatusAt(ts2.Add(time.Millisecond))
if actualStatus != "resolved" {
t.Errorf("expected alert to be resolved after it ended, but got %s", actualStatus)
}
}
func TestSortAlerts(t *testing.T) {
ts := time.Now()
alerts := Alerts{
{
Labels: LabelSet{
"alertname": "InternalError",
"dev": "sda3",
},
StartsAt: ts.Add(-6 * time.Minute),
EndsAt: ts.Add(-3 * time.Minute),
},
{
Labels: LabelSet{
"alertname": "DiskFull",
"dev": "sda1",
},
StartsAt: ts.Add(-5 * time.Minute),
EndsAt: ts.Add(-4 * time.Minute),
},
{
Labels: LabelSet{
"alertname": "OutOfMemory",
"dev": "sda1",
},
StartsAt: ts.Add(-2 * time.Minute),
EndsAt: ts.Add(-1 * time.Minute),
},
{
Labels: LabelSet{
"alertname": "DiskFull",
"dev": "sda2",
},
StartsAt: ts.Add(-2 * time.Minute),
EndsAt: ts.Add(-3 * time.Minute),
},
{
Labels: LabelSet{
"alertname": "OutOfMemory",
"dev": "sda2",
},
StartsAt: ts.Add(-5 * time.Minute),
EndsAt: ts.Add(-2 * time.Minute),
},
}
sort.Sort(alerts)
expected := []string{
"DiskFull[5ffe595][resolved]",
"InternalError[09cfd46][resolved]",
"OutOfMemory[d43a602][resolved]",
"DiskFull[5ff4595][resolved]",
"OutOfMemory[d444602][resolved]",
}
for i := range alerts {
if alerts[i].String() != expected[i] {
t.Errorf("expected alert %s at index %d, but got %s", expected[i], i, alerts[i].String())
}
}
}
func TestAlertsStatus(t *testing.T) {
ts := time.Now()
firingAlerts := Alerts{
{
Labels: LabelSet{
"foo": "bar",
},
StartsAt: ts,
},
{
Labels: LabelSet{
"bar": "baz",
},
StartsAt: ts,
},
}
actualStatus := firingAlerts.Status()
expectedStatus := AlertFiring
if actualStatus != expectedStatus {
t.Errorf("expected status %s, but got %s", expectedStatus, actualStatus)
}
actualStatus = firingAlerts.StatusAt(ts)
if actualStatus != expectedStatus {
t.Errorf("expected status %s, but got %s", expectedStatus, actualStatus)
}
ts = time.Now()
resolvedAlerts := Alerts{
{
Labels: LabelSet{
"foo": "bar",
},
StartsAt: ts.Add(-1 * time.Minute),
EndsAt: ts,
},
{
Labels: LabelSet{
"bar": "baz",
},
StartsAt: ts.Add(-1 * time.Minute),
EndsAt: ts,
},
}
actualStatus = resolvedAlerts.Status()
expectedStatus = AlertResolved
if actualStatus != expectedStatus {
t.Errorf("expected status %s, but got %s", expectedStatus, actualStatus)
}
actualStatus = resolvedAlerts.StatusAt(ts)
expectedStatus = AlertResolved
if actualStatus != expectedStatus {
t.Errorf("expected status %s, but got %s", expectedStatus, actualStatus)
}
ts = time.Now()
mixedAlerts := Alerts{
{
Labels: LabelSet{
"foo": "bar",
},
StartsAt: ts.Add(-1 * time.Minute),
EndsAt: ts.Add(5 * time.Minute),
},
{
Labels: LabelSet{
"bar": "baz",
},
StartsAt: ts.Add(-1 * time.Minute),
EndsAt: ts,
},
}
actualStatus = mixedAlerts.Status()
expectedStatus = AlertFiring
if actualStatus != expectedStatus {
t.Errorf("expected status %s, but got %s", expectedStatus, actualStatus)
}
actualStatus = mixedAlerts.StatusAt(ts)
expectedStatus = AlertFiring
if actualStatus != expectedStatus {
t.Errorf("expected status %s, but got %s", expectedStatus, actualStatus)
}
actualStatus = mixedAlerts.StatusAt(ts.Add(5 * time.Minute))
expectedStatus = AlertResolved
if actualStatus != expectedStatus {
t.Errorf("expected status %s, but got %s", expectedStatus, actualStatus)
}
}