#31 loan: get application

loan/src/main/java/com/example/loan/controller/ApplicationController.java

@@ -4,10 +4,7 @@ import com.example.loan.dto.ApplicationDto;
 import com.example.loan.dto.ResponseDto;
 import com.example.loan.service.ApplicationService;
 import lombok.RequiredArgsConstructor;
-import org.springframework.web.bind.annotation.PostMapping;
-import org.springframework.web.bind.annotation.RequestBody;
-import org.springframework.web.bind.annotation.RequestMapping;
-import org.springframework.web.bind.annotation.RestController;
+import org.springframework.web.bind.annotation.*;
 
 @RestController
 @RequiredArgsConstructor
@@ -22,4 +19,11 @@ public class ApplicationController extends AbstractController {
     ) {
         return ok(applicationService.create(request));
     }
+
+    @GetMapping("/{applicationId}")
+    public ResponseDto<ApplicationDto.Response> get(
+            @PathVariable Long applicationId
+    ) {
+        return ok(applicationService.get(applicationId));
+    }
 }

loan/src/main/java/com/example/loan/service/ApplicationService.java

@@ -5,4 +5,6 @@ import com.example.loan.dto.ApplicationDto;
 public interface ApplicationService {
 
     ApplicationDto.Response create(ApplicationDto.Request request);
+
+    ApplicationDto.Response get(Long applicationId);
 }

loan/src/main/java/com/example/loan/service/ApplicationServiceImpl.java

@@ -2,6 +2,8 @@ package com.example.loan.service;
 
 import com.example.loan.domain.Application;
 import com.example.loan.dto.ApplicationDto;
+import com.example.loan.exception.BaseException;
+import com.example.loan.exception.ResultType;
 import com.example.loan.repository.ApplicationRepository;
 import lombok.RequiredArgsConstructor;
 import org.modelmapper.ModelMapper;
@@ -25,4 +27,12 @@ public class ApplicationServiceImpl implements ApplicationService {
 
         return modelMapper.map(applied, ApplicationDto.Response.class);
     }
+
+    @Override
+    public ApplicationDto.Response get(Long applicationId) {
+        Application application = applicationRepository.findById(applicationId)
+                .orElseThrow(() -> new BaseException(ResultType.SYSTEM_ERROR));
+
+        return modelMapper.map(application, ApplicationDto.Response.class);
+    }
 }

loan/src/test/java/com/example/loan/service/ApplicationServiceTest.java

@@ -13,6 +13,7 @@ import org.mockito.junit.jupiter.MockitoExtension;
 import org.modelmapper.ModelMapper;
 
 import java.math.BigDecimal;
+import java.util.Optional;
 
 import static org.assertj.core.api.Assertions.assertThat;
 import static org.assertj.core.api.Assertions.assertThatThrownBy;
@@ -55,4 +56,19 @@ class ApplicationServiceTest {
         assertThat(actual.getCellPhone()).isSameAs(entity.getCellPhone());
         assertThat(actual.getEmail()).isSameAs(entity.getEmail());
     }
+
+    @Test
+    void Should_ReturnResponseOfExistApplicationEntity_When_RequestExistApplicationId() {
+        Long findId = 1L;
+
+        Application entity = Application.builder()
+                .applicationId(1L)
+                .build();
+
+        when(applicationRepository.findById(findId)).thenReturn(Optional.ofNullable(entity));
+
+        ApplicationDto.Response actual = applicationService.get(findId);
+
+        assertThat(actual.getApplicationId()).isSameAs(findId);
+    }
 }