Merge pull request #88 from muonsoft/chore/update-golangci-lint

chore: bump golangci-lint to v2.11.4 and fix new linter findings

Author: strider2038

.github/workflows/tests.yml

@@ -26,7 +26,7 @@ jobs:
       - name: Run golangci-lint
         uses: golangci/golangci-lint-action@v9
         with:
-          version: v2.6.1
+          version: v2.11.4
 
       - name: Run tests
         run: go test -race -v ./...

AGENTS.md

@@ -202,6 +202,6 @@ This is a pure Go library with no external services or infrastructure dependenci
 ### Caveats
 
 - `golangci-lint` is installed to `$(go env GOPATH)/bin`. Ensure this is on `PATH` (the VM's `~/.bashrc` exports it).
-- The CI workflow (`.github/workflows/tests.yml`) pins `golangci-lint` at **v2.6.1** and Go at **^1.24**. Match these versions locally.
+- The CI workflow (`.github/workflows/tests.yml`) pins `golangci-lint` at **v2.11.4** and Go at **^1.24**. Match these versions locally.
 - The `.golangci.yml` uses config **version: "2"** (golangci-lint v2 format). Do not use golangci-lint v1.
 - No Makefile, Docker, or docker-compose is used. No services need to be started.

example_http_handler_test.go

@@ -78,7 +78,7 @@ func ExampleValidator_Validate_httpHandler() {
 	handler = language.NewMiddleware(handler, language.SupportedLanguages(language.English, language.Russian))
 
 	// creating request with the language-specific header
-	request := httptest.NewRequest(http.MethodPost, "/", strings.NewReader(`{}`))
+	request := httptest.NewRequestWithContext(context.Background(), http.MethodPost, "/", strings.NewReader(`{}`))
 	request.Header.Set("Accept-Language", "ru")
 
 	recorder := httptest.NewRecorder()

it/choice.go

@@ -39,7 +39,7 @@ func IsOneOf[T comparable](values ...T) ChoiceConstraint[T] {
 		if i > 0 {
 			s.WriteString(", ")
 		}
-		s.WriteString(fmt.Sprint(value))
+		_, _ = fmt.Fprintf(&s, "%v", value)
 	}
 
 	return ChoiceConstraint[T]{

validate/barcodes.go

@@ -132,6 +132,9 @@ func decodeUPCE(value string) ([]byte, error) {
 		if i >= 8 {
 			return nil, ErrUnexpectedLength
 		}
+		if digit < 0 || digit > 9 {
+			return nil, fmt.Errorf("%w: %q", ErrContainsNonDigit, v)
+		}
 		upce = append(upce, byte(digit))
 		sum += digit
 	}