feat: list Pokemons

build.gradle

@@ -14,7 +14,12 @@ repositories {
 
 dependencies {
 	implementation 'org.springframework.boot:spring-boot-starter-web'
+	implementation 'org.projectlombok:lombok:1.18.24'
+	annotationProcessor 'org.projectlombok:lombok:1.18.24'
+
 	testImplementation 'org.springframework.boot:spring-boot-starter-test'
+	testImplementation 'org.projectlombok:lombok:1.18.24'
+	testAnnotationProcessor 'org.projectlombok:lombok:1.18.24'
 }
 
 tasks.named('test') {

src/main/java/com/origin/challenge/ChallengeApplication.java

@@ -2,6 +2,9 @@
 
 import org.springframework.boot.SpringApplication;
 import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.context.annotation.Bean;
+
+import java.net.http.HttpClient;
 
 @SpringBootApplication
 public class ChallengeApplication {
@@ -10,4 +13,8 @@ public static void main(String[] args) {
 		SpringApplication.run(ChallengeApplication.class, args);
 	}
 
+	@Bean
+	public HttpClient httpClient() {
+		return HttpClient.newHttpClient();
+	}
 }

src/main/java/com/origin/challenge/controllers/PokemonController.java

@@ -1,18 +1,46 @@
 package com.origin.challenge.controllers;
 
+import com.fasterxml.jackson.databind.ObjectMapper;
+import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.http.ResponseEntity;
 import org.springframework.web.bind.annotation.GetMapping;
 import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RequestParam;
 import org.springframework.web.bind.annotation.RestController;
 
-import java.util.Map;
+import java.net.URI;
+import java.net.http.HttpClient;
+import java.net.http.HttpRequest;
+import java.net.http.HttpResponse;
 
 @RestController
 @RequestMapping("/pokemon")
 public class PokemonController {
 
+    @Autowired
+    private HttpClient httpClient;
+
     @GetMapping
-    public ResponseEntity<Map<String, String>> root() {
-        return ResponseEntity.ok(Map.of("message", "Hello World"));
+    public ResponseEntity<PokemonDTO> listPokemon(@RequestParam(name = "page", defaultValue = "1") int page)
+            throws Exception {
+        final int limit = 20;
+        final int offset = page - 1;
+        final String url = String.format("https://pokeapi.co/api/v2/pokemon?offset=%d&limit=%d", offset, limit);
+
+        final HttpRequest r = HttpRequest.newBuilder()
+                .uri(new URI(url))
+                .header(
+                    "Authorization",
+                    "eyJhbGciOiJIUzI1NiJ9.eyJSb2xlIjoiQWRtaW4iLCJJc3N1ZXIiOiJJc3N1ZXIiLCJVc2VybmFtZSI6IkphdmFJblVzZ" +
+                    "SIsImV4cCI6MTY2MjA0MjMzNCwiaWF0IjoxNjYyMDQyMzM0fQ.xi3uKpbHXXxE5iTOkDrkHJfpXQhGQGjLHXwC1SE-kFI"
+                )
+                .GET()
+                .build();
+        final HttpResponse<String> r2 = this.httpClient.send(r, HttpResponse.BodyHandlers.ofString());
+
+        final ObjectMapper objectMapper = new ObjectMapper();
+        final PokemonDTO r3 = objectMapper.readValue(r2.body(), PokemonDTO.class);
+
+        return ResponseEntity.ok(r3);
     }
 }

src/main/java/com/origin/challenge/controllers/PokemonDTO.java

@@ -0,0 +1,27 @@
+package com.origin.challenge.controllers;
+
+import com.fasterxml.jackson.annotation.JsonIgnoreProperties;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import lombok.Data;
+import lombok.NoArgsConstructor;
+
+import java.util.List;
+
+@Data
+@NoArgsConstructor
+@JsonIgnoreProperties(ignoreUnknown = true)
+public class PokemonDTO {
+    @JsonProperty("results")
+    private List<Type> results;
+
+    @Data
+    @NoArgsConstructor
+    @JsonIgnoreProperties(ignoreUnknown = true)
+    public static class Type {
+        @JsonProperty("name")
+        private String name;
+
+        @JsonProperty("url")
+        private String url;
+    }
+}

src/test/java/com/origin/challenge/controllers/PokemonControllerIntegrationTest.java

@@ -0,0 +1,74 @@
+package com.origin.challenge.controllers;
+
+import org.junit.jupiter.api.BeforeAll;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.extension.ExtendWith;
+import org.mockito.InjectMocks;
+import org.mockito.Mock;
+import org.mockito.junit.jupiter.MockitoExtension;
+
+import java.net.URI;
+import java.net.http.HttpClient;
+import java.net.http.HttpRequest;
+import java.net.http.HttpResponse;
+
+import static org.mockito.Mockito.*;
+
+@ExtendWith(MockitoExtension.class)
+@SuppressWarnings({"unchecked", "rawtypes"})
+public class PokemonControllerIntegrationTest {
+    @Mock
+    private HttpClient httpClient;
+
+    @InjectMocks
+    private PokemonController pokemonController;
+
+
+    private static HttpResponse httpResponse;
+
+
+    @BeforeEach
+    public void setup() {
+        httpResponse = mock(HttpResponse.class);
+        when(httpResponse.body()).thenReturn("{\"count\":1154,\"next\":\"https://pokeapi.co/api/v2/pokemon?offset=20" +
+                "&limit=20\",\"previous\":null,\"results\":[{\"name\":\"bulbasaur\",\"url\":\"https://pokeapi.co/api" +
+                "/v2/pokemon/1/\"}]}"
+        );
+    }
+
+
+    @Test
+    void test1() throws Exception {
+        when(httpClient.send(any(), any())).thenReturn(httpResponse);
+        final HttpRequest expected = HttpRequest.newBuilder()
+                .uri(new URI("https://pokeapi.co/api/v2/pokemon?offset=0&limit=20"))
+                .header(
+                        "Authorization",
+                        "eyJhbGciOiJIUzI1NiJ9.eyJSb2xlIjoiQWRtaW4iLCJJc3N1ZXIiOiJJc3N1ZXIiLCJVc2VybmFtZSI6IkphdmFJblVzZ" +
+                        "SIsImV4cCI6MTY2MjA0MjMzNCwiaWF0IjoxNjYyMDQyMzM0fQ.xi3uKpbHXXxE5iTOkDrkHJfpXQhGQGjLHXwC1SE-kFI"
+                )
+                .GET()
+                .build();
+
+        pokemonController.listPokemon(1);
+        verify(httpClient, times(1)).send(expected, HttpResponse.BodyHandlers.ofString());
+    }
+
+    @Test
+    void test2() throws Exception {
+        when(httpClient.send(any(), any())).thenReturn(httpResponse);
+        final HttpRequest expected = HttpRequest.newBuilder()
+                .uri(new URI("https://pokeapi.co/api/v2/pokemon?offset=20&limit=20"))
+                .header(
+                        "Authorization",
+                        "eyJhbGciOiJIUzI1NiJ9.eyJSb2xlIjoiQWRtaW4iLCJJc3N1ZXIiOiJJc3N1ZXIiLCJVc2VybmFtZSI6IkphdmFJblVzZ" +
+                                "SIsImV4cCI6MTY2MjA0MjMzNCwiaWF0IjoxNjYyMDQyMzM0fQ.xi3uKpbHXXxE5iTOkDrkHJfpXQhGQGjLHXwC1SE-kFI"
+                )
+                .GET()
+                .build();
+
+        pokemonController.listPokemon(2);
+        verify(httpClient, times(1)).send(expected, HttpResponse.BodyHandlers.ofString());
+    }
+}