Copyright 2021 Red Hat, Inc
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.
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package push_test
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Documentation in literate-programming-style is available at:
https://redhatinsights.github.io/insights-operator-utils/packages/metrics/push/push_test.html
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import (
"context"
"fmt"
"net/http"
"net/http/httptest"
"testing"
"time"
"github.com/RedHatInsights/insights-operator-utils/metrics/push"
"github.com/rs/zerolog/log"
"github.com/stretchr/testify/assert"
)
var (
testJob = "testjob"
testGatewayAuthToken = "gateway_auth_token"
)
func TestInitMetrics ( t * testing . T ) {
t . Run ( "optimal setup" , func ( t * testing . T ) {
err := push . InitMetrics ( testInitFunctions )
assert . NoError ( t , err )
} )
t . Run ( "already registered metrics" , func ( t * testing . T ) {
err := push . InitMetrics ( testInitFunctions )
assert . NoError ( t , err )
} )
}
func TestPushMetrics ( t * testing . T ) {
err := push . InitMetrics ( testInitFunctions )
assert . NoError ( t , err )
t . Run ( "ok response" , func ( t * testing . T ) {
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Fake a Pushgateway that responds with 202 to DELETE and with 200 in
all other cases.
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pgwOK := httptest . NewServer (
http . HandlerFunc ( func ( w http . ResponseWriter , r * http . Request ) {
w . Header ( ) . Set ( "Content-Type" , `text/plain; charset=utf-8` )
if r . Method == http . MethodDelete {
w . WriteHeader ( http . StatusAccepted )
return
}
w . WriteHeader ( http . StatusOK )
} ) ,
)
defer pgwOK . Close ( )
err := push . SendMetrics ( testJob , pgwOK . URL , testGatewayAuthToken )
assert . NoError ( t , err )
} )
t . Run ( "error response" , func ( t * testing . T ) {
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Fake a Pushgateway that responds with 500.
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pgwErr := httptest . NewServer (
http . HandlerFunc ( func ( w http . ResponseWriter , r * http . Request ) {
w . Header ( ) . Set ( "Content-Type" , `text/plain; charset=utf-8` )
w . WriteHeader ( http . StatusInternalServerError )
} ) ,
)
defer pgwErr . Close ( )
err := push . SendMetrics ( testJob , pgwErr . URL , testGatewayAuthToken )
assert . Error ( t , err )
} )
}
func TestPushMetricsInLoop ( t * testing . T ) {
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Fake a Pushgateway that responds with 202 to DELETE and with 200 in
all other cases and counts the number of pushes received
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var (
pushes int
expectedPushes = 3
timeBetweenPush = 1 * time . Second
totalTime = 4 * time . Second
)
pgwOK := httptest . NewServer (
http . HandlerFunc ( func ( w http . ResponseWriter , r * http . Request ) {
w . Header ( ) . Set ( "Content-Type" , `text/plain; charset=utf-8` )
if r . Method == http . MethodDelete {
w . WriteHeader ( http . StatusAccepted )
return
}
w . WriteHeader ( http . StatusOK )
pushes ++
} ) ,
)
defer pgwOK . Close ( )
t . Run ( "if TimeBetweenPush != 0" , func ( t * testing . T ) {
ctx , cancel := context . WithTimeout ( context . Background ( ) , totalTime )
go push . SendMetricsInLoop ( ctx , testJob , pgwOK . URL , testGatewayAuthToken , time . Duration ( timeBetweenPush ) )
time . Sleep ( totalTime )
cancel ( )
time . Sleep ( 1 * time . Second )
assert . GreaterOrEqual ( t , pushes , expectedPushes , fmt . Sprintf ( "expected more than %d pushes but found %d" , expectedPushes , pushes ) )
log . Info ( ) . Int ( "pushes" , pushes ) . Msg ( "debug" )
} )
t . Run ( "if TimeBetweenPush is 0, don't do anything" , func ( t * testing . T ) {
lastPushes := pushes
ctx , cancel := context . WithTimeout ( context . Background ( ) , totalTime )
timeBetweenPush = 0 * time . Second
go push . SendMetricsInLoop ( ctx , testJob , pgwOK . URL , testGatewayAuthToken , time . Duration ( timeBetweenPush ) )
time . Sleep ( totalTime )
cancel ( )
assert . Equal ( t , lastPushes , pushes , "expected not to have pushed any more metrics" )
log . Info ( ) . Int ( "pushes" , pushes ) . Msg ( "debug" )
} )
}
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