test: NbpServiceTest completed?

src/main/java/eu/ztsh/wymiana/config/RestClientConfiguration.java

@@ -0,0 +1,18 @@
+package eu.ztsh.wymiana.config;
+
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.web.client.RestClient;
+
+@Configuration
+public class RestClientConfiguration {
+
+    @Bean
+    public RestClient restClient() {
+        return RestClient.builder()
+            .baseUrl("http://api.nbp.pl")
+            .defaultHeader("Accept", "application/json")
+            .build();
+    }
+
+}

src/main/java/eu/ztsh/wymiana/service/NbpService.java

@@ -4,6 +4,7 @@ import eu.ztsh.wymiana.model.Rates;
 import lombok.RequiredArgsConstructor;
 import org.assertj.core.util.VisibleForTesting;
 import org.springframework.stereotype.Service;
+import org.springframework.web.client.RestClient;
 
 import java.time.Clock;
 import java.time.DayOfWeek;
@@ -18,6 +19,8 @@ import java.time.temporal.TemporalAdjusters;
 public class NbpService {
 
     private final Clock clock;
+    private final RestClient restClient;
+    private static final String URI_PATTERN = "/api/exchangerates/rates/c/{code}/{date}/";
 
     public double getSellRate(String currency) {
         throw new UnsupportedOperationException("Not implemented yet");
@@ -41,7 +44,7 @@ public class NbpService {
     }
 
     @VisibleForTesting
-    Rates fetchData(String date) {
+    Rates fetchData(String code, String date) {
         throw new UnsupportedOperationException("Not implemented yet");
     }
 
@@ -49,6 +52,7 @@ public class NbpService {
         return today.getDayOfWeek() == DayOfWeek.SATURDAY
             || today.getDayOfWeek() == DayOfWeek.SUNDAY;
     }
+
     private record RatesCache(LocalDate date, double buy, double sell) {
 
     }