all: sync with master; upd chlog

internal/aghtest/aghtest.go

@@ -4,10 +4,14 @@ package aghtest
 import (
 	"crypto/sha256"
 	"io"
+	"net/http"
+	"net/http/httptest"
 	"net/netip"
+	"net/url"
 	"testing"
 
 	"github.com/AdguardTeam/golibs/log"
+	"github.com/stretchr/testify/require"
 )
 
 const (
@@ -51,3 +55,19 @@ func HostToIPs(host string) (ipv4, ipv6 netip.Addr) {
 
 	return netip.AddrFrom4([4]byte(hash[:4])), netip.AddrFrom16([16]byte(hash[4:20]))
 }
+
+// StartHTTPServer is a helper that starts the HTTP server, which is configured
+// to return data on every request, and returns the client and server URL.
+func StartHTTPServer(t testing.TB, data []byte) (c *http.Client, u *url.URL) {
+	t.Helper()
+
+	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, _ *http.Request) {
+		_, _ = w.Write(data)
+	}))
+	t.Cleanup(srv.Close)
+
+	u, err := url.Parse(srv.URL)
+	require.NoError(t, err)
+
+	return srv.Client(), u
+}