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main_test.go
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main_test.go
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package main
import (
"net/http"
"net/http/httptest"
"testing"
"github.com/google/go-cmp/cmp"
)
type constHandler struct {
s string
}
func (h constHandler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
w.Write([]byte(h.s))
}
func TestGetMetrics(t *testing.T) {
tcs := []struct {
statsJson string
expected string
}{
{
statsJson: `{"httpStartTime":1616252622240,"memoryUsage":194924544,"memoryUsageHeap":36845824,"totalUsers":1,"httpRequests":{"meter":{"mean":0.19830325431417883,"count":15,"currentRate":0.27914103077088026,"1MinuteRate":0.15421117090001737,"5MinuteRate":0.04501349471844342,"15MinuteRate":0.01608537818128321},"histogram":{"min":0.8717880100011826,"max":12.836927011609077,"sum":41.26530301570892,"variance":10.038097927388511,"mean":2.7510202010472615,"stddev":3.1682957449374123,"count":15,"median":1.572950005531311,"p75":2.5995219945907593,"p95":12.836927011609077,"p99":12.836927011609077,"p999":12.836927011609077}},"connects":{"mean":0.1699089576647754,"count":1,"currentRate":0.16990908200350413,"1MinuteRate":0.015991117074135343,"5MinuteRate":0.0033057092356765017,"15MinuteRate":0.001108030399020654},"activePads":1,"pendingEdits":0,"edits":{"meter":{"mean":1.0212670241700796,"count":3,"currentRate":1.0212673798266378,"1MinuteRate":0,"5MinuteRate":0,"15MinuteRate":0},"histogram":{"min":1.6878540068864822,"max":2.3621450066566467,"sum":5.915806010365486,"variance":0.12211450650073814,"mean":1.9719353367884953,"stddev":0.34944886106659173,"count":3,"median":1.8658069968223572,"p75":2.3621450066566467,"p95":2.3621450066566467,"p99":2.3621450066566467,"p999":2.3621450066566467}}}`,
expected: `# HELP etherpad_memory_usage
# TYPE etherpad_memory_usage gauge
etherpad_memory_usage{type="total"} 194924544
etherpad_memory_usage{type="heap"} 36845824
# HELP etherpad_total_users
# TYPE etherpad_total_users gauge
etherpad_total_users 1
# HELP etherpad_active_pads
# TYPE etherpad_active_pads gauge
etherpad_active_pads 1
# HELP etherpad_http_requests
# TYPE etherpad_http_requests counter
etherpad_http_requests 15
# HELP etherpad_connects
# TYPE etherpad_connects gauge
etherpad_connects 1
# HELP etherpad_disconnects
# TYPE etherpad_disconnects gauge
etherpad_disconnects 0
# HELP etherpad_edits
# TYPE etherpad_edits gauge
etherpad_edits 3
# HELP etherpad_failed_changesets
# TYPE etherpad_failed_changesets gauge
etherpad_failed_changesets 0
# HELP etherpad_ueberdb_locks
# TYPE etherpad_ueberdb_locks gauge
etherpad_ueberdb_locks{state="awaits"} 0
etherpad_ueberdb_locks{state="acquires"} 0
etherpad_ueberdb_locks{state="releases"} 0
# HELP etherpad_ueberdb_reads
# TYPE etherpad_ueberdb_reads gauge
etherpad_ueberdb_reads 0
etherpad_ueberdb_reads{state="failed"} 0
etherpad_ueberdb_reads{state="finished"} 0
etherpad_ueberdb_reads{state="from_cache"} 0
etherpad_ueberdb_reads{state="from_db"} 0
etherpad_ueberdb_reads{state="from_db_failed"} 0
etherpad_ueberdb_reads{state="from_db_finished"} 0
# HELP etherpad_ueberdb_writes
# TYPE etherpad_ueberdb_writes gauge
etherpad_ueberdb_writes 0
etherpad_ueberdb_writes{state="failed"} 0
etherpad_ueberdb_writes{state="finished"} 0
etherpad_ueberdb_writes{state="obsoleted"} 0
etherpad_ueberdb_writes{state="to_db"} 0
etherpad_ueberdb_writes{state="to_db_failed"} 0
etherpad_ueberdb_writes{state="to_db_finished"} 0
`,
},
{
statsJson: `{"httpStartTime":1616872986576,"memoryUsage":123133952,"memoryUsageHeap":35726848,"ueberdb_lockAwaits":0,"ueberdb_lockAcquires":0,"ueberdb_lockReleases":0,"ueberdb_reads":0,"ueberdb_readsFailed":0,"ueberdb_readsFinished":0,"ueberdb_readsFromCache":0,"ueberdb_readsFromDb":0,"ueberdb_readsFromDbFailed":0,"ueberdb_readsFromDbFinished":0,"ueberdb_writes":0,"ueberdb_writesFailed":0,"ueberdb_writesFinished":0,"ueberdb_writesObsoleted":0,"ueberdb_writesToDb":0,"ueberdb_writesToDbFailed":0,"ueberdb_writesToDbFinished":0,"totalUsers":0,"httpRequests":{"meter":{"mean":0,"count":0,"currentRate":0,"1MinuteRate":0,"5MinuteRate":0,"15MinuteRate":0},"histogram":{"min":null,"max":null,"sum":0,"variance":null,"mean":0,"stddev":null,"count":0,"median":null,"p75":null,"p95":null,"p99":null,"p999":null}}}`,
expected: `# HELP etherpad_memory_usage
# TYPE etherpad_memory_usage gauge
etherpad_memory_usage{type="total"} 123133952
etherpad_memory_usage{type="heap"} 35726848
# HELP etherpad_total_users
# TYPE etherpad_total_users gauge
etherpad_total_users 0
# HELP etherpad_active_pads
# TYPE etherpad_active_pads gauge
etherpad_active_pads 0
# HELP etherpad_http_requests
# TYPE etherpad_http_requests counter
etherpad_http_requests 0
# HELP etherpad_connects
# TYPE etherpad_connects gauge
etherpad_connects 0
# HELP etherpad_disconnects
# TYPE etherpad_disconnects gauge
etherpad_disconnects 0
# HELP etherpad_edits
# TYPE etherpad_edits gauge
etherpad_edits 0
# HELP etherpad_failed_changesets
# TYPE etherpad_failed_changesets gauge
etherpad_failed_changesets 0
# HELP etherpad_ueberdb_locks
# TYPE etherpad_ueberdb_locks gauge
etherpad_ueberdb_locks{state="awaits"} 0
etherpad_ueberdb_locks{state="acquires"} 0
etherpad_ueberdb_locks{state="releases"} 0
# HELP etherpad_ueberdb_reads
# TYPE etherpad_ueberdb_reads gauge
etherpad_ueberdb_reads 0
etherpad_ueberdb_reads{state="failed"} 0
etherpad_ueberdb_reads{state="finished"} 0
etherpad_ueberdb_reads{state="from_cache"} 0
etherpad_ueberdb_reads{state="from_db"} 0
etherpad_ueberdb_reads{state="from_db_failed"} 0
etherpad_ueberdb_reads{state="from_db_finished"} 0
# HELP etherpad_ueberdb_writes
# TYPE etherpad_ueberdb_writes gauge
etherpad_ueberdb_writes 0
etherpad_ueberdb_writes{state="failed"} 0
etherpad_ueberdb_writes{state="finished"} 0
etherpad_ueberdb_writes{state="obsoleted"} 0
etherpad_ueberdb_writes{state="to_db"} 0
etherpad_ueberdb_writes{state="to_db_failed"} 0
etherpad_ueberdb_writes{state="to_db_finished"} 0
`,
},
}
for _, tc := range tcs {
srv := httptest.NewServer(constHandler{tc.statsJson})
h := handler{
etherpadURL: srv.URL,
}
req, err := http.NewRequest("GET", "/metrics", nil)
if err != nil {
t.Fatal(err)
}
rr := httptest.NewRecorder()
h.ServeHTTP(rr, req)
if status := rr.Code; status != http.StatusOK {
t.Errorf("handler returned wrong status code: got %v want %v", status, http.StatusOK)
}
if rr.Body.String() != tc.expected {
t.Errorf("Response does not match the expected string:\n%s", cmp.Diff(rr.Body.String(), tc.expected))
}
srv.Close()
}
}