KRYSTALM7 commented on code in PR #171:
URL:
https://github.com/apache/fineract-loan-origination/pull/171#discussion_r4293568027
##########
src/test/java/org/apache/fineract/los/exception/GlobalExceptionHandlerTest.java:
##########
@@ -20,19 +20,335 @@
package org.apache.fineract.los.exception;
import static org.assertj.core.api.Assertions.assertThat;
+import static org.hamcrest.Matchers.containsString;
+import static org.hamcrest.Matchers.hasSize;
+import static org.mockito.ArgumentMatchers.any;
+import static org.mockito.ArgumentMatchers.eq;
+import static org.mockito.Mockito.verify;
+import static org.mockito.Mockito.verifyNoInteractions;
+import static org.mockito.Mockito.when;
+import static
org.springframework.test.web.servlet.request.MockMvcRequestBuilders.get;
+import static
org.springframework.test.web.servlet.request.MockMvcRequestBuilders.post;
+import static
org.springframework.test.web.servlet.result.MockMvcResultMatchers.jsonPath;
+import static
org.springframework.test.web.servlet.result.MockMvcResultMatchers.status;
+import jakarta.validation.constraints.NotNull;
+import java.math.BigDecimal;
+import java.util.stream.Stream;
+import org.apache.fineract.los.api.ApprovalController;
+import org.apache.fineract.los.api.CustomerLoanApplicationController;
+import org.apache.fineract.los.api.LoanApplicationController;
+import org.apache.fineract.los.domain.LoanApplication;
import org.apache.fineract.los.domain.enums.LoanApplicationStatus;
+import org.apache.fineract.los.dto.request.CreateLoanApplicationRequest;
+import org.apache.fineract.los.repository.ApprovalStageRepository;
+import org.apache.fineract.los.service.ApprovalWorkflowService;
+import org.apache.fineract.los.service.CreditScoringService;
+import org.apache.fineract.los.service.LoanApplicationService;
import org.apache.fineract.los.statemachine.LoanStateTransitionException;
+import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.extension.ExtendWith;
+import org.junit.jupiter.params.ParameterizedTest;
+import org.junit.jupiter.params.provider.Arguments;
+import org.junit.jupiter.params.provider.EnumSource;
+import org.junit.jupiter.params.provider.MethodSource;
+import org.mockito.ArgumentCaptor;
+import org.mockito.Mock;
+import org.mockito.junit.jupiter.MockitoExtension;
import org.springframework.http.HttpStatus;
+import org.springframework.http.MediaType;
import org.springframework.http.ResponseEntity;
+import org.springframework.http.converter.HttpMessageNotReadableException;
+import
org.springframework.security.web.method.annotation.AuthenticationPrincipalArgumentResolver;
+import org.springframework.test.web.servlet.MockMvc;
+import org.springframework.test.web.servlet.ResultActions;
+import org.springframework.test.web.servlet.setup.MockMvcBuilders;
+import org.springframework.web.bind.MethodArgumentNotValidException;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.RestController;
+import
org.springframework.web.method.annotation.HandlerMethodValidationException;
+import org.springframework.web.server.ResponseStatusException;
-/** Unit tests for {@link GlobalExceptionHandler}. */
-@DisplayName("GlobalExceptionHandler")
+@ExtendWith(MockitoExtension.class)
class GlobalExceptionHandlerTest {
- private final GlobalExceptionHandler handler = new GlobalExceptionHandler();
+ private static final String APPLICATIONS = "/api/v1/loan-applications";
+ private static final String APPLICATION_REF = "LOS-2026-00001";
+ private static final String VALID_REQUEST =
+ """
+ {
+ "requestedAmount": 10000,
+ "currency": "USD",
+ "loanPurpose": "BUSINESS",
+ "tenorMonths": 12,
+ "fineractLoanProductId": 1,
+ "applicant": {
+ "fullName": "Test Applicant",
+ "nationalId": "TEST-001",
+ "monthlyIncome": 5000
+ }
+ }
+ """;
+
+ @Mock private LoanApplicationService loanApplicationService;
+ @Mock private CreditScoringService creditScoringService;
+ @Mock private ApprovalWorkflowService approvalWorkflowService;
+ @Mock private ApprovalStageRepository approvalStageRepository;
+
+ private MockMvc mockMvc;
+
+ @BeforeEach
+ void setUp() {
+ mockMvc =
+ MockMvcBuilders.standaloneSetup(
+ new LoanApplicationController(
+ loanApplicationService, creditScoringService,
approvalWorkflowService),
+ new CustomerLoanApplicationController(
+ loanApplicationService, creditScoringService,
approvalStageRepository),
+ new ApprovalController(
+ approvalWorkflowService, approvalStageRepository,
loanApplicationService),
+ new InvalidReturnValueController())
+ .setCustomArgumentResolvers(new
AuthenticationPrincipalArgumentResolver())
+ .setControllerAdvice(new GlobalExceptionHandler())
+ .build();
+ }
+
+ @ParameterizedTest(name = "{index}: {1}")
+ @MethodSource("invalidLoanRequests")
+ void beanValidationReturnsBadRequest(final String body, final String
expectedMessage)
+ throws Exception {
+ expectBadRequest(APPLICATIONS, body)
+ .andExpect(jsonPath("$.message", containsString(expectedMessage)))
+ .andExpect(
+ result ->
+ assertThat(result.getResolvedException())
+ .isInstanceOf(MethodArgumentNotValidException.class));
+
+ verifyNoInteractions(loanApplicationService);
+ }
+
+ static Stream<Arguments> invalidLoanRequests() {
+ return Stream.of(
+ invalidLoanRequest("\"requestedAmount\": 10000,", "",
"requestedAmount: must not be null"),
+ invalidLoanRequest("10000", "null", "requestedAmount: must not be
null"),
+ invalidLoanRequest(
+ "10000", "-1", "requestedAmount: requestedAmount must be greater
than zero"),
+ invalidLoanRequest(
+ "10000", "0", "requestedAmount: requestedAmount must be greater
than zero"),
+ invalidLoanRequest("\"USD\"", "null", "currency: currency is
required"),
+ invalidLoanRequest("\"USD\"", "\"\"", "currency: currency is
required"),
+ invalidLoanRequest("USD", "US", "currency: currency must be a 3-letter
ISO 4217 code"),
+ invalidLoanRequest("USD", "usd", "currency: currency must contain only
uppercase letters"),
+ invalidLoanRequest(
+ "\"tenorMonths\": 12", "\"tenorMonths\": null", "tenorMonths:
tenorMonths is required"),
+ invalidLoanRequest(
+ "\"tenorMonths\": 12",
+ "\"tenorMonths\": 0",
+ "tenorMonths: tenorMonths must be at least 1"),
+ invalidLoanRequest(
+ "\"fullName\": \"Test Applicant\",", "", "applicant.fullName:
fullName is required"),
+ invalidLoanRequest(
+ "\"Test Applicant\"", "null", "applicant.fullName: fullName is
required"),
+ invalidLoanRequest("Test Applicant", " ", "applicant.fullName:
fullName is required"),
+ invalidLoanRequest(
+ "Test Applicant",
+ "12345",
+ "applicant.fullName: fullName must contain only letters, spaces,
hyphens, and apostrophes"),
+ invalidLoanRequest(
+ "Test Applicant",
+ "A".repeat(101),
+ "applicant.fullName: fullName must be between 2 and 100
characters"),
+ invalidLoanRequest(
+ "TEST-001",
+ "A".repeat(51),
+ "applicant.nationalId: nationalId must not exceed 50 characters"),
+ invalidLoanRequest(
+ "5000", "-1", "applicant.monthlyIncome: monthlyIncome must be zero
or positive"),
+ Arguments.of(
+ """
+ {"requestedAmount": 10000, "currency": "USD", "tenorMonths": 12}
+ """,
+ "applicant: must not be null"),
+ Arguments.of(
+ """
+ {"requestedAmount": 10000, "currency": "USD", "tenorMonths": 12,
"applicant": null}
+ """,
+ "applicant: must not be null"));
+ }
+
+ private static Arguments invalidLoanRequest(
+ final String original, final String replacement, final String
expectedMessage) {
+ return Arguments.of(VALID_REQUEST.replace(original, replacement),
expectedMessage);
+ }
+
+ @Test
+ void reportsAllInvalidFields() throws Exception {
+ expectBadRequest(APPLICATIONS, "{}")
+ .andExpect(jsonPath("$.message", containsString("requestedAmount: must
not be null")))
+ .andExpect(jsonPath("$.message", containsString("currency: currency is
required")))
+ .andExpect(jsonPath("$.message", containsString("tenorMonths:
tenorMonths is required")))
+ .andExpect(jsonPath("$.message", containsString("applicant: must not
be null")));
+
+ verifyNoInteractions(loanApplicationService);
+ }
+
+ @ParameterizedTest
+ @MethodSource("unreadableRequests")
+ void unreadableBodyReturnsBadRequest(final String body) throws Exception {
+ expectBadRequest(APPLICATIONS, body)
+ .andExpect(jsonPath("$.message").value("Request body is missing or
contains invalid JSON."))
+ .andExpect(
+ result ->
+ assertThat(result.getResolvedException())
+ .isInstanceOf(HttpMessageNotReadableException.class));
+
+ verifyNoInteractions(loanApplicationService);
+ }
+
+ static Stream<String> unreadableRequests() {
+ return Stream.of(
+ VALID_REQUEST.replace(
+ "\"fineractLoanProductId\": 1", "\"fineractLoanProductId\":
\"invalid\""),
+ VALID_REQUEST.replace(
+ "\"fineractLoanProductId\": 1", "\"fineractLoanProductId\":
9223372036854775808"),
+ VALID_REQUEST.replace("10000", "\"invalid\""),
+ VALID_REQUEST.replace("\"tenorMonths\": 12", "\"tenorMonths\":
\"invalid\""),
+ "{\"requestedAmount\":",
+ "[]",
+ "null",
+ "");
+ }
+
+ @Test
+ void customerRequestIsRejectedBeforeServiceInvocation() throws Exception {
+ expectBadRequest("/api/v1/customer/loan-applications", "{}")
+ .andExpect(jsonPath("$.message", containsString("requestedAmount: must
not be null")));
+
+ verifyNoInteractions(loanApplicationService);
+ }
+
+ @Test
+ void methodValidationIncludesNestedBodyErrors() throws Exception {
+ expectBadRequest(
+ APPLICATIONS + "/" + APPLICATION_REF + "/approval-decisions",
+ """
+ {"decision": "APPROVE", "comments": "short"}
+ """)
+ .andExpect(
+ jsonPath(
+ "$.message",
+ containsString("comments: comments must be between 10 and 2000
characters")))
+ .andExpect(
+ result ->
+ assertThat(result.getResolvedException())
+ .isInstanceOf(HandlerMethodValidationException.class));
+
+ verifyNoInteractions(approvalWorkflowService, loanApplicationService,
approvalStageRepository);
+ }
+
+ @Test
+ void methodValidationIncludesInvalidParameter() throws Exception {
+ mockMvc
+ .perform(get(APPLICATIONS + "/invalid-reference"))
+ .andExpect(status().isBadRequest())
+ .andExpect(jsonPath("$.status").value(400))
+ .andExpect(
+ jsonPath(
+ "$.message", containsString("applicationRef: applicationRef
must follow format")))
+ .andExpect(
+ result ->
+ assertThat(result.getResolvedException())
+ .isInstanceOf(HandlerMethodValidationException.class));
+
+ verifyNoInteractions(loanApplicationService);
+ }
+
+ @Test
+ void validRequestStillCreatesApplication() throws Exception {
+ final LoanApplication application = new LoanApplication();
+ application.setApplicationRef(APPLICATION_REF);
+ application.setStatus(LoanApplicationStatus.DRAFT);
+ application.setRequestedAmount(new BigDecimal("10000"));
+ application.setCurrency("USD");
+ when(loanApplicationService.createApplication(
+ any(CreateLoanApplicationRequest.class), eq("default")))
+ .thenReturn(application);
+
+ mockMvc
+
.perform(post(APPLICATIONS).contentType(MediaType.APPLICATION_JSON).content(VALID_REQUEST))
+ .andExpect(status().isCreated())
+ .andExpect(jsonPath("$.applicationRef").value(APPLICATION_REF))
+ .andExpect(jsonPath("$.status").value("DRAFT"))
+ .andExpect(jsonPath("$.requestedAmount").value(10000))
+ .andExpect(jsonPath("$.currency").value("USD"));
+
+ final ArgumentCaptor<CreateLoanApplicationRequest> request =
+ ArgumentCaptor.forClass(CreateLoanApplicationRequest.class);
+ verify(loanApplicationService).createApplication(request.capture(),
eq("default"));
+
assertThat(request.getValue().getRequestedAmount()).isEqualByComparingTo("10000");
+ assertThat(request.getValue().getFineractLoanProductId()).isEqualTo(1L);
+
assertThat(request.getValue().getApplicant().getFullName()).isEqualTo("Test
Applicant");
+ }
+
+ @Test
+ void unexpectedServiceFailureRemainsInternalServerError() throws Exception {
+ when(loanApplicationService.createApplication(
+ any(CreateLoanApplicationRequest.class), eq("default")))
+ .thenThrow(new NullPointerException("Internal implementation detail"));
+
+ mockMvc
+
.perform(post(APPLICATIONS).contentType(MediaType.APPLICATION_JSON).content(VALID_REQUEST))
+ .andExpect(status().isInternalServerError())
+ .andExpect(jsonPath("$.status").value(500))
+ .andExpect(jsonPath("$.error").value("Internal Server Error"))
+ .andExpect(jsonPath("$.message").value("An unexpected error
occurred."));
+ }
+
+ @Test
+ void returnValueValidationRemainsInternalServerError() throws Exception {
Review Comment:
Good regression test Explicitly verifying that return-value validation
failures remain HTTP 500 is important. This ensures that server-side contract
violations are not incorrectly classified as client request errors.
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