test: add unit test for PotsService

Author: felipemelozx

src/main/java/fun/trackmoney/pots/dtos/PotsResponseDTO.java

@@ -1,6 +1,7 @@
 package fun.trackmoney.pots.dtos;
 
-public record PotsResponseDTO(String name,
+public record PotsResponseDTO(Long potId,
+                              String name,
                               String description,
                               Long targetAmount,
                               Long currentAmount) {

src/test/java/fun/trackmoney/pots/service/PotsServiceTest.java

@@ -0,0 +1,58 @@
+package fun.trackmoney.pots.service;
+
+import fun.trackmoney.account.entity.AccountEntity;
+import fun.trackmoney.pots.dtos.PotsResponseDTO;
+import fun.trackmoney.pots.entity.PotsEntity;
+import fun.trackmoney.pots.mapper.PotsMapper;
+import fun.trackmoney.pots.repository.PotsRepository;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+import org.mockito.InjectMocks;
+import org.mockito.Mock;
+import org.mockito.MockitoAnnotations;
+
+import java.util.List;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertNotNull;
+import static org.mockito.Mockito.when;
+
+class PotsServiceTest {
+
+  @InjectMocks
+  private PotsService potsService;
+
+  @Mock
+  private PotsRepository potsRepository;
+
+  @Mock
+  private PotsMapper potsMapper;
+
+  @BeforeEach
+  void setUp() {
+    MockitoAnnotations.openMocks(this);
+  }
+
+  @Test
+  void findAllPots_shouldReturnMappedPotsList() {
+    Integer accountId = 1;
+    PotsEntity pots1 = new PotsEntity(1L,"test name2", "Test Pot1", 100L, 1001L, new AccountEntity());
+    PotsEntity pots2 = new PotsEntity(2L,"test name2", "Test Pot2", 100L, 1002L, new AccountEntity());
+
+    List<PotsEntity> potsEntities = List.of(pots1, pots2);
+
+    List<PotsResponseDTO> potsResponseDTOList = List.of(
+        new PotsResponseDTO(1L, "test name2", "Test Pot1", 100L, 1001L),
+        new PotsResponseDTO(2L, "test name2", "Test Pot2", 100L, 1002L)
+    );
+
+    when(potsRepository.findAllPotsByAccountId(accountId)).thenReturn(potsEntities);
+    when(potsMapper.listToResponse(potsEntities)).thenReturn(potsResponseDTOList);
+
+    var result = potsService.findAllPots(accountId);
+
+    assertNotNull(result);
+    assertEquals(2, result.size());
+    assertEquals(1L, result.get(0).potId());
+  }
+}