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|
package expvarhandler
import (
"encoding/json"
"expvar"
"strings"
"sync"
"testing"
"github.com/valyala/fasthttp"
)
var once sync.Once
func TestExpvarHandlerBasic(t *testing.T) {
t.Parallel()
// Publish panics if the same var is published more than once,
// which can happen if the test is run with -count
once.Do(func() {
expvar.Publish("customVar", expvar.Func(func() any {
return "foobar"
}))
})
var ctx fasthttp.RequestCtx
expvarHandlerCalls.Set(0)
ExpvarHandler(&ctx)
body := ctx.Response.Body()
var m map[string]any
if err := json.Unmarshal(body, &m); err != nil {
t.Fatalf("unexpected error: %v", err)
}
if _, ok := m["cmdline"]; !ok {
t.Fatalf("cannot locate cmdline expvar")
}
if _, ok := m["memstats"]; !ok {
t.Fatalf("cannot locate memstats expvar")
}
v := m["customVar"]
sv, ok := v.(string)
if !ok {
t.Fatalf("unexpected custom var type %T. Expecting string", v)
}
if sv != "foobar" {
t.Fatalf("unexpected custom var value: %q. Expecting %q", v, "foobar")
}
v = m["expvarHandlerCalls"]
fv, ok := v.(float64)
if !ok {
t.Fatalf("unexpected expvarHandlerCalls type %T. Expecting float64", v)
}
if int(fv) != 1 {
t.Fatalf("unexpected value for expvarHandlerCalls: %v. Expecting %v", fv, 1)
}
}
func TestExpvarHandlerRegexp(t *testing.T) {
var ctx fasthttp.RequestCtx
ctx.QueryArgs().Set("r", "cmd")
ExpvarHandler(&ctx)
body := string(ctx.Response.Body())
if !strings.Contains(body, `"cmdline"`) {
t.Fatalf("missing 'cmdline' expvar")
}
if strings.Contains(body, `"memstats"`) {
t.Fatalf("unexpected memstats expvar found")
}
}
|
