fix: format IPv6 addr correclty for HTTP URL (#254)

* fix: format IPv6 addr correclty for HTTP URL

* test: cover changes

* test: refactor

---------

Co-authored-by: gm0stache <gm0stache@noreply.codeberg.org>

pkg/client/dns_internal_test.go

@@ -0,0 +1,30 @@
+package client
+
+import (
+	"net/netip"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestGetVerifyURL(t *testing.T) {
+	tests := map[string]struct {
+		given netip.Addr
+		want  string
+	}{
+		"IPv4": {
+			given: netip.MustParseAddr("93.184.216.34"),
+			want:  "http://93.184.216.34:/.uncloud-verify",
+		},
+		"IPv6": {
+			given: netip.MustParseAddr("2001:db8::1"),
+			want:  "http://[2001:db8::1]:/.uncloud-verify",
+		},
+	}
+	for name, tt := range tests {
+		t.Run(name, func(t *testing.T) {
+			got := getVerifyURL(tt.given)
+			assert.Equal(t, tt.want, got)
+		})
+	}
+}