Copyright 2020 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 httputils_test
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Documentation in literate-programming-style is available at:
https://redhatinsights.github.io/insights-operator-utils/packages/http/metricsmiddlewaretest.html
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import (
"bytes"
"context"
"fmt"
"net"
"net/http"
"strings"
"testing"
"github.com/gorilla/mux"
"github.com/rs/zerolog"
"github.com/rs/zerolog/log"
"github.com/stretchr/testify/assert"
httputils "github.com/RedHatInsights/insights-operator-utils/http"
"github.com/RedHatInsights/insights-operator-utils/metrics"
"github.com/RedHatInsights/insights-operator-utils/responses"
"github.com/RedHatInsights/insights-operator-utils/tests/helpers"
"github.com/prometheus/client_golang/prometheus"
"github.com/prometheus/client_golang/prometheus/testutil"
)
const (
localhostAddress = "localhost"
port = 8080
)
func TestLogRequest ( t * testing . T ) {
buf := new ( bytes . Buffer )
log . Logger = zerolog . New ( buf ) . With ( ) . Timestamp ( ) . Logger ( )
server := createTestServer ( t , [ ] Endpoint {
{
Path : "/" ,
Func : func ( writer http . ResponseWriter , request * http . Request ) {
err := responses . Send ( http . StatusOK , writer , responses . BuildOkResponse ( ) )
helpers . FailOnError ( t , err )
} ,
Methods : [ ] string { http . MethodGet } ,
} ,
} )
resp , err := http . Get ( fmt . Sprintf ( "http://%v:%v/" , localhostAddress , port ) )
helpers . FailOnError ( t , err )
assert . Equal ( t , http . StatusOK , resp . StatusCode )
err = server . Shutdown ( context . TODO ( ) )
helpers . FailOnError ( t , err )
assert . Contains ( t , buf . String ( ) , "Request received - URI: /, Method: GET" )
expected := `
# HELP api_endpoints_requests The total number of requests per endpoint
# TYPE api_endpoints_requests counter
api_endpoints_requests{endpoint="/"} 1
`
assertCollectorEquals ( t , metrics . APIRequests , expected )
expected = `
# HELP api_endpoints_status_codes API endpoints status codes
# TYPE api_endpoints_status_codes counter
api_endpoints_status_codes{endpoint="/", status_code="200"} 1
`
assertCollectorEquals ( t , metrics . APIResponseStatusCodes , expected )
}
type Endpoint struct {
Path string
Func func ( http . ResponseWriter , * http . Request )
Methods [ ] string
}
func createTestServer ( t testing . TB , endpoints [ ] Endpoint ) * http . Server {
router := mux . NewRouter ( ) . StrictSlash ( true )
router . Use ( httputils . LogRequest )
for _ , endpoint := range endpoints {
router . HandleFunc ( endpoint . Path , endpoint . Func ) . Methods ( endpoint . Methods ... )
}
server := & http . Server { Addr : fmt . Sprintf ( "%v:%v" , localhostAddress , port ) , Handler : router }
listener , err := net . Listen ( "tcp" , server . Addr )
helpers . FailOnError ( t , err )
go func ( ) {
if err := server . Serve ( listener ) ; err != nil && err != http . ErrServerClosed {
helpers . FailOnError ( t , err )
}
} ( )
return server
}
func assertCollectorEquals ( t * testing . T , c prometheus . Collector , expected string ) {
err := testutil . CollectAndCompare ( c , strings . NewReader ( expected ) )
helpers . FailOnError ( t , err )
}
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