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scraper_test.go
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scraper_test.go
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// Copyright The OpenTelemetry Authors
// SPDX-License-Identifier: Apache-2.0
package apachereceiver
import (
"context"
"errors"
"fmt"
"net/http"
"net/http/httptest"
"net/url"
"path/filepath"
"testing"
"github.com/stretchr/testify/require"
"go.opentelemetry.io/collector/component"
"go.opentelemetry.io/collector/component/componenttest"
"go.opentelemetry.io/collector/config/confighttp"
"go.opentelemetry.io/collector/config/configtls"
"go.opentelemetry.io/collector/receiver/receivertest"
"github.com/open-telemetry/opentelemetry-collector-contrib/pkg/golden"
"github.com/open-telemetry/opentelemetry-collector-contrib/pkg/pdatatest/pmetrictest"
"github.com/open-telemetry/opentelemetry-collector-contrib/receiver/apachereceiver/internal/metadata"
)
func TestScraper(t *testing.T) {
apacheMock := newMockServer(t)
cfg := createDefaultConfig().(*Config)
cfg.Endpoint = fmt.Sprintf("%s%s", apacheMock.URL, "/server-status?auto")
require.NoError(t, component.ValidateConfig(cfg))
serverName, port, err := parseResourceAttributes(cfg.Endpoint)
require.NoError(t, err)
scraper := newApacheScraper(receivertest.NewNopCreateSettings(), cfg, serverName, port)
err = scraper.start(context.Background(), componenttest.NewNopHost())
require.NoError(t, err)
actualMetrics, err := scraper.scrape(context.Background())
require.NoError(t, err)
expectedFile := filepath.Join("testdata", "scraper", "expected.yaml")
expectedMetrics, err := golden.ReadMetrics(expectedFile)
require.NoError(t, err)
url, err := url.Parse(apacheMock.URL)
require.NoError(t, err)
expectedMetrics.ResourceMetrics().At(0).Resource().Attributes().PutStr("apache.server.port", url.Port())
// The port is random, so we shouldn't check if this value matches.
require.NoError(t, pmetrictest.CompareMetrics(expectedMetrics, actualMetrics,
pmetrictest.IgnoreMetricDataPointsOrder(), pmetrictest.IgnoreStartTimestamp(), pmetrictest.IgnoreTimestamp()))
}
func TestScraperFailedStart(t *testing.T) {
sc := newApacheScraper(receivertest.NewNopCreateSettings(), &Config{
HTTPClientSettings: confighttp.HTTPClientSettings{
Endpoint: "localhost:8080",
TLSSetting: configtls.TLSClientSetting{
TLSSetting: configtls.TLSSetting{
CAFile: "/non/existent",
},
},
},
},
"localhost",
"8080")
err := sc.start(context.Background(), componenttest.NewNopHost())
require.Error(t, err)
}
func TestParseScoreboard(t *testing.T) {
t.Run("test freq count", func(t *testing.T) {
scoreboard := `S_DD_L_GGG_____W__IIII_C________________W__________________________________.........................____WR______W____W________________________C______________________________________W_W____W______________R_________R________C_________WK_W________K_____W__C__________W___R______.............................................................................................................................`
results := parseScoreboard(scoreboard)
require.EqualValues(t, int64(150), results[metadata.AttributeScoreboardStateOpen])
require.EqualValues(t, int64(217), results[metadata.AttributeScoreboardStateWaiting])
require.EqualValues(t, int64(1), results[metadata.AttributeScoreboardStateStarting])
require.EqualValues(t, int64(4), results[metadata.AttributeScoreboardStateReading])
require.EqualValues(t, int64(12), results[metadata.AttributeScoreboardStateSending])
require.EqualValues(t, int64(2), results[metadata.AttributeScoreboardStateKeepalive])
require.EqualValues(t, int64(2), results[metadata.AttributeScoreboardStateDnslookup])
require.EqualValues(t, int64(4), results[metadata.AttributeScoreboardStateClosing])
require.EqualValues(t, int64(1), results[metadata.AttributeScoreboardStateLogging])
require.EqualValues(t, int64(3), results[metadata.AttributeScoreboardStateFinishing])
require.EqualValues(t, int64(4), results[metadata.AttributeScoreboardStateIdleCleanup])
})
t.Run("test unknown", func(t *testing.T) {
scoreboard := `qwertyuiopasdfghjklzxcvbnm`
results := parseScoreboard(scoreboard)
require.EqualValues(t, int64(0), results[metadata.AttributeScoreboardStateOpen])
require.EqualValues(t, int64(0), results[metadata.AttributeScoreboardStateWaiting])
require.EqualValues(t, int64(0), results[metadata.AttributeScoreboardStateStarting])
require.EqualValues(t, int64(0), results[metadata.AttributeScoreboardStateReading])
require.EqualValues(t, int64(0), results[metadata.AttributeScoreboardStateSending])
require.EqualValues(t, int64(0), results[metadata.AttributeScoreboardStateKeepalive])
require.EqualValues(t, int64(0), results[metadata.AttributeScoreboardStateDnslookup])
require.EqualValues(t, int64(0), results[metadata.AttributeScoreboardStateClosing])
require.EqualValues(t, int64(0), results[metadata.AttributeScoreboardStateLogging])
require.EqualValues(t, int64(0), results[metadata.AttributeScoreboardStateFinishing])
require.EqualValues(t, int64(0), results[metadata.AttributeScoreboardStateIdleCleanup])
require.EqualValues(t, int64(26), results[metadata.AttributeScoreboardStateUnknown])
})
t.Run("test empty defaults", func(t *testing.T) {
emptyString := ""
results := parseScoreboard(emptyString)
require.EqualValues(t, int64(0), results[metadata.AttributeScoreboardStateOpen])
require.EqualValues(t, int64(0), results[metadata.AttributeScoreboardStateWaiting])
require.EqualValues(t, int64(0), results[metadata.AttributeScoreboardStateStarting])
require.EqualValues(t, int64(0), results[metadata.AttributeScoreboardStateReading])
require.EqualValues(t, int64(0), results[metadata.AttributeScoreboardStateSending])
require.EqualValues(t, int64(0), results[metadata.AttributeScoreboardStateKeepalive])
require.EqualValues(t, int64(0), results[metadata.AttributeScoreboardStateDnslookup])
require.EqualValues(t, int64(0), results[metadata.AttributeScoreboardStateClosing])
require.EqualValues(t, int64(0), results[metadata.AttributeScoreboardStateLogging])
require.EqualValues(t, int64(0), results[metadata.AttributeScoreboardStateFinishing])
require.EqualValues(t, int64(0), results[metadata.AttributeScoreboardStateIdleCleanup])
})
}
func TestParseStats(t *testing.T) {
t.Run("with empty value", func(t *testing.T) {
emptyString := ""
require.EqualValues(t, map[string]string{}, parseStats(emptyString))
})
t.Run("with multi colons", func(t *testing.T) {
got := "CurrentTime: Thursday, 17-Jun-2021 14:06:32 UTC"
want := map[string]string{
"CurrentTime": "Thursday, 17-Jun-2021 14:06:32 UTC",
}
require.EqualValues(t, want, parseStats(got))
})
t.Run("with header/footer", func(t *testing.T) {
got := `localhost
ReqPerSec: 719.771
IdleWorkers: 227
ConnsTotal: 110
BytesPerSec: 73.12
`
want := map[string]string{
"ReqPerSec": "719.771",
"IdleWorkers": "227",
"ConnsTotal": "110",
"BytesPerSec": "73.12",
}
require.EqualValues(t, want, parseStats(got))
})
}
func TestScraperError(t *testing.T) {
t.Run("no client", func(t *testing.T) {
sc := newApacheScraper(receivertest.NewNopCreateSettings(), &Config{}, "", "")
sc.httpClient = nil
_, err := sc.scrape(context.Background())
require.Error(t, err)
require.EqualValues(t, errors.New("failed to connect to Apache HTTPd"), err)
})
}
func newMockServer(t *testing.T) *httptest.Server {
return httptest.NewServer(http.HandlerFunc(func(rw http.ResponseWriter, req *http.Request) {
if req.URL.String() == "/server-status?auto" {
rw.WriteHeader(200)
_, err := rw.Write([]byte(`ServerUptimeSeconds: 410
Total Accesses: 14169
Total kBytes: 20910
BusyWorkers: 13
IdleWorkers: 227
ConnsTotal: 110
CPUChildrenSystem: 0.01
CPUChildrenUser: 0.02
CPUSystem: 0.03
CPUUser: 0.04
CPULoad: 0.66
Load1: 0.9
Load5: 0.4
Load15: 0.3
Total Duration: 1501
Scoreboard: S_DD_L_GGG_____W__IIII_C________________W__________________________________.........................____WR______W____W________________________C______________________________________W_W____W______________R_________R________C_________WK_W________K_____W__C__________W___R______.............................................................................................................................
`))
require.NoError(t, err)
return
}
rw.WriteHeader(404)
}))
}