Christian-Oette

public class CountryCodeValidator implements ConstraintValidator<ValidIso2CountryCode, String> {

    private static final Set<String> isoCountries = Locale.getISOCountries(Locale.IsoCountryCode.PART1_ALPHA2);

    @Override
    public boolean isValid(String content, ConstraintValidatorContext context) {
        if (content == null) {
            setErrorMessage(context, "Country code must not be null");
            return false;
        }

Christian-Oette

public class FileResponseResource extends ByteArrayResource {

    private final String fileName;
    private final int fileLength;

    public FileResponseResource(String fileName, final byte[] byteArray) {
        super(byteArray);
        this.fileName = Objects.requireNonNull(fileName);
        this.fileLength = byteArray.length;
    }

Christian-Oette

import java.util.Map;

import jakarta.servlet.RequestDispatcher;
import jakarta.servlet.http.HttpServletRequest;
import org.springframework.boot.web.servlet.error.ErrorController;
import org.springframework.http.HttpStatus;
import org.springframework.http.MediaType;
import org.springframework.http.ResponseEntity;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;

Christian-Oette

import java.util.regex.Pattern;

import static org.assertj.core.api.Assertions.assertThat;
import static org.springframework.test.web.servlet.request.MockMvcRequestBuilders.get;
import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.status;
import com.fasterxml.jackson.databind.ObjectMapper;
import io.swagger.v3.oas.models.OpenAPI;
import org.junit.jupiter.api.Test;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.autoconfigure.web.servlet.AutoConfigureMockMvc;