Add integration tests for validation, error handling, and task filtering

Introduced `ValidationAndErrorHandlingIT` and `PagingAndFilteringIT` integration tests to verify validations, error responses, and task filtering/pagination behaviors. Updated IntelliJ HTTP client script for task-related operations. Enhanced `ProjectTaskControllerIT` assertions for better coverage.

src/main/java/se/urmo/hemhub/dto/ProjectTaskDtos.java

@@ -7,9 +7,9 @@ import java.util.*;
 public class ProjectTaskDtos {
     // Projects
     public record CreateProjectRequest(
-            @NotNull UUID householdId,
-            @NotBlank String name,
-            String description
+            @NotNull(message = "householdId is required") UUID householdId,
+            @NotBlank(message = "name is required") String name,
+            @Size(max = 2000, message = "description too long") String description
     ) {}
 
     public record ProjectResponse(
@@ -20,30 +20,30 @@ public class ProjectTaskDtos {
 
     // Project tasks (existing)
     public record CreateTaskRequest(
-            @NotNull UUID projectId,
-            @NotBlank String title,
-            String description,
-            @Pattern(regexp="LOW|MEDIUM|HIGH") String priority,
-            @Pattern(regexp="OPEN|IN_PROGRESS|DONE") String status,
+            @NotNull(message = "projectId is required") UUID projectId,
+            @NotBlank(message = "title is required") String title,
+            @Size(max = 8000, message = "description too long") String description,
+            @Pattern(regexp="LOW|MEDIUM|HIGH", message="priority must be LOW|MEDIUM|HIGH") String priority,
+            @Pattern(regexp="OPEN|IN_PROGRESS|DONE", message="status must be OPEN|IN_PROGRESS|DONE") String status,
             LocalDate dueDate,
             String assigneeSub
     ) {}
 
     // Household tasks (new) – no projectId
     public record CreateHouseholdTaskRequest(
-            @NotBlank String title,
-            String description,
-            @Pattern(regexp="LOW|MEDIUM|HIGH") String priority,
-            @Pattern(regexp="OPEN|IN_PROGRESS|DONE") String status,
+            @NotBlank(message = "title is required") String title,
+            @Size(max = 8000, message = "description too long") String description,
+            @Pattern(regexp="LOW|MEDIUM|HIGH", message="priority must be LOW|MEDIUM|HIGH") String priority,
+            @Pattern(regexp="OPEN|IN_PROGRESS|DONE", message="status must be OPEN|IN_PROGRESS|DONE") String status,
             LocalDate dueDate,
             String assigneeSub
     ) {}
 
     public record UpdateTaskRequest(
-            String title,
-            String description,
-            @Pattern(regexp="LOW|MEDIUM|HIGH") String priority,
-            @Pattern(regexp="OPEN|IN_PROGRESS|DONE") String status,
+            @Size(min = 1, max = 200, message = "title must be 1..200 characters") String title,
+            @Size(max = 8000, message = "description too long") String description,
+            @Pattern(regexp="LOW|MEDIUM|HIGH", message="priority must be LOW|MEDIUM|HIGH") String priority,
+            @Pattern(regexp="OPEN|IN_PROGRESS|DONE", message="status must be OPEN|IN_PROGRESS|DONE") String status,
             LocalDate dueDate,
             String assigneeSub
     ) {}
@@ -57,4 +57,12 @@ public class ProjectTaskDtos {
             LocalDate dueDate,
             String assigneeSub
     ) {}
+
+    // ---- Filters + paging helper ----
+    public record TaskFilter(
+            String status,      // OPEN|IN_PROGRESS|DONE
+            String priority,    // LOW|MEDIUM|HIGH
+            LocalDate dueFrom,
+            LocalDate dueTo
+    ) {}
 }

src/main/java/se/urmo/hemhub/repo/ProjectRepository.java

@@ -1,10 +1,13 @@
 package se.urmo.hemhub.repo;
 
+import org.springframework.data.domain.Page;
+import org.springframework.data.domain.Pageable;
 import org.springframework.data.jpa.repository.JpaRepository;
 import se.urmo.hemhub.domain.Project;
+
 import java.util.*;
 
 public interface ProjectRepository extends JpaRepository<Project, UUID> {
-    List<Project> findByHouseholdId(UUID householdId);
+    Page<Project> findByHouseholdId(UUID householdId, Pageable pageable);
     boolean existsByIdAndHouseholdId(UUID projectId, UUID householdId);
 }

src/main/java/se/urmo/hemhub/repo/TaskRepository.java

@@ -1,25 +1,27 @@
 package se.urmo.hemhub.repo;
 
-import org.springframework.data.jpa.repository.JpaRepository;
-import org.springframework.data.jpa.repository.Query;
+import org.springframework.data.domain.Page;
+import org.springframework.data.domain.Pageable;
+import org.springframework.data.jpa.repository.*;
 import org.springframework.data.repository.query.Param;
 import se.urmo.hemhub.domain.Task;
 
 import java.time.LocalDate;
 import java.util.*;
 
-public interface TaskRepository extends JpaRepository<Task, UUID> {
+public interface TaskRepository extends JpaRepository<Task, UUID>, JpaSpecificationExecutor<Task> {
 
+    // Simple finders (used in existing flows)
     List<Task> findByProjectId(UUID projectId);
     boolean existsByIdAndProjectId(UUID taskId, UUID projectId);
-
-    // Household-level tasks (no project)
     List<Task> findByHouseholdIdAndProjectIsNull(UUID householdId);
 
-    // All tasks due on a given day, excluding a particular status (e.g., DONE)
+    // Paging versions (used by new endpoints)
+    Page<Task> findAll(org.springframework.data.jpa.domain.Specification<Task> spec, Pageable pageable);
+
+    // For Iteration 4 service
     List<Task> findByDueDateAndStatusNot(LocalDate date, Task.Status status);
 
-    // Only tasks for households where the given user is a member (for the /me view)
     @Query("""
       select t
       from Task t

src/main/java/se/urmo/hemhub/repo/TaskSpecifications.java

@@ -0,0 +1,34 @@
+package se.urmo.hemhub.repo;
+
+import org.springframework.data.jpa.domain.Specification;
+import se.urmo.hemhub.domain.Task;
+
+import java.time.LocalDate;
+import java.util.UUID;
+
+public class TaskSpecifications {
+
+    public static Specification<Task> inProject(UUID projectId) {
+        return (root, q, cb) -> cb.equal(root.get("project").get("id"), projectId);
+    }
+
+    public static Specification<Task> inHousehold(UUID householdId) {
+        return (root, q, cb) -> cb.equal(root.get("household").get("id"), householdId);
+    }
+
+    public static Specification<Task> withStatus(Task.Status status) {
+        return (root, q, cb) -> cb.equal(root.get("status"), status);
+    }
+
+    public static Specification<Task> withPriority(Task.Priority prio) {
+        return (root, q, cb) -> cb.equal(root.get("priority"), prio);
+    }
+
+    public static Specification<Task> dueFrom(LocalDate from) {
+        return (root, q, cb) -> cb.greaterThanOrEqualTo(root.get("dueDate"), from);
+    }
+
+    public static Specification<Task> dueTo(LocalDate to) {
+        return (root, q, cb) -> cb.lessThanOrEqualTo(root.get("dueDate"), to);
+    }
+}

src/main/java/se/urmo/hemhub/service/ProjectTaskService.java

@@ -1,15 +1,21 @@
 package se.urmo.hemhub.service;
 
 import lombok.RequiredArgsConstructor;
+import org.springframework.data.domain.Page;
+import org.springframework.data.domain.Pageable;
 import org.springframework.stereotype.Service;
 import org.springframework.transaction.annotation.Transactional;
 import se.urmo.hemhub.domain.*;
+import se.urmo.hemhub.dto.ProjectTaskDtos.TaskFilter;
 import se.urmo.hemhub.repo.*;
 
 import java.time.LocalDate;
 import java.util.*;
 import java.util.function.Consumer;
 
+import static org.springframework.data.jpa.domain.Specification.where;
+import static se.urmo.hemhub.repo.TaskSpecifications.*;
+
 @Service
 @RequiredArgsConstructor
 public class ProjectTaskService {
@@ -42,16 +48,16 @@ public class ProjectTaskService {
     }
 
     @Transactional(readOnly = true)
-    public List<Project> listProjects(UUID householdId, String requesterSub) {
+    public Page<Project> listProjects(UUID householdId, String requesterSub, Pageable pageable) {
         ensureMember(householdId, requesterSub);
-        return projects.findByHouseholdId(householdId);
+        return projects.findByHouseholdId(householdId, pageable);
     }
 
     @Transactional
     public void deleteProject(UUID projectId, String requesterSub) {
         var p = projects.findById(projectId).orElseThrow();
         ensureOwner(p.getHousehold().getId(), requesterSub);
-        projects.delete(p); // cascades tasks for that project
+        projects.delete(p);
     }
 
     // -------- Tasks (project-scoped) --------
@@ -66,10 +72,18 @@ public class ProjectTaskService {
     }
 
     @Transactional(readOnly = true)
-    public List<Task> listTasks(UUID projectId, String requesterSub) {
+    public Page<Task> listTasks(UUID projectId, String requesterSub, TaskFilter filter, Pageable pageable) {
         var p = projects.findById(projectId).orElseThrow();
         ensureMember(p.getHousehold().getId(), requesterSub);
-        return tasks.findByProjectId(projectId);
+
+        var spec = where(inProject(projectId));
+        if (filter != null) {
+            if (filter.status() != null) spec = spec.and(withStatus(Task.Status.valueOf(filter.status())));
+            if (filter.priority() != null) spec = spec.and(withPriority(Task.Priority.valueOf(filter.priority())));
+            if (filter.dueFrom() != null) spec = spec.and(dueFrom(filter.dueFrom()));
+            if (filter.dueTo() != null) spec = spec.and(dueTo(filter.dueTo()));
+        }
+        return tasks.findAll(spec, pageable);
     }
 
     // -------- Tasks (household-scoped, no project) --------
@@ -85,9 +99,19 @@ public class ProjectTaskService {
     }
 
     @Transactional(readOnly = true)
-    public List<Task> listHouseholdTasks(UUID householdId, String requesterSub) {
+    public Page<Task> listHouseholdTasks(UUID householdId, String requesterSub, TaskFilter filter, Pageable pageable) {
         ensureMember(householdId, requesterSub);
-        return tasks.findByHouseholdIdAndProjectIsNull(householdId);
+
+        var spec = where(inHousehold(householdId));
+        // limit to non-project tasks? No—design choice: include both unless filter requires "projectless only".
+        // If you want ONLY household-level tasks (no project), add spec = spec.and((r,q,cb)->cb.isNull(r.get("project")));
+        if (filter != null) {
+            if (filter.status() != null) spec = spec.and(withStatus(Task.Status.valueOf(filter.status())));
+            if (filter.priority() != null) spec = spec.and(withPriority(Task.Priority.valueOf(filter.priority())));
+            if (filter.dueFrom() != null) spec = spec.and(dueFrom(filter.dueFrom()));
+            if (filter.dueTo() != null) spec = spec.and(dueTo(filter.dueTo()));
+        }
+        return tasks.findAll(spec, pageable);
     }
 
     // -------- Common updates --------
@@ -100,9 +124,10 @@ public class ProjectTaskService {
         return tasks.save(t);
     }
 
+    // -------- Iteration 4 helper --------
     @Transactional(readOnly = true)
-    public java.util.List<Task> tasksDueTomorrowForUser(String userSub) {
-        var tomorrow = LocalDate.now(java.time.Clock.systemDefaultZone()).plusDays(1);
-        return tasks.findDueByDateForUser(tomorrow, Task.Status.DONE, userSub);
+    public java.util.List<se.urmo.hemhub.domain.Task> tasksDueTomorrowForUser(String userSub) {
+        var tomorrow = java.time.LocalDate.now(java.time.Clock.systemDefaultZone()).plusDays(1);
+        return tasks.findDueByDateForUser(tomorrow, se.urmo.hemhub.domain.Task.Status.DONE, userSub);
     }
 }

src/main/java/se/urmo/hemhub/web/ErrorHandling.java

@@ -0,0 +1,86 @@
+package se.urmo.hemhub.web;
+
+import jakarta.servlet.http.HttpServletRequest;
+import jakarta.validation.ConstraintViolationException;
+import org.springframework.dao.DataIntegrityViolationException;
+import org.springframework.http.HttpStatus;
+import org.springframework.http.converter.HttpMessageNotReadableException;
+import org.springframework.security.access.AccessDeniedException;
+import org.springframework.web.HttpMediaTypeNotSupportedException;
+import org.springframework.web.HttpRequestMethodNotSupportedException;
+import org.springframework.web.bind.MethodArgumentNotValidException;
+import org.springframework.web.bind.annotation.*;
+
+import java.time.Instant;
+import java.util.Map;
+import java.util.NoSuchElementException;
+
+@RestControllerAdvice
+public class ErrorHandling {
+
+    record ErrorResponse(Instant timestamp, int status, String error, String message, String path, Map<String,Object> details){}
+
+    private ErrorResponse resp(HttpStatus s, String message, String path, Map<String,Object> details) {
+        return new ErrorResponse(Instant.now(), s.value(), s.getReasonPhrase(), message, path, details);
+    }
+
+    @ExceptionHandler(MethodArgumentNotValidException.class)
+    @ResponseStatus(HttpStatus.BAD_REQUEST)
+    ErrorResponse handleValidation(MethodArgumentNotValidException ex, HttpServletRequest req) {
+        var fieldErrors = ex.getBindingResult().getFieldErrors().stream()
+                .collect(java.util.stream.Collectors.toMap(
+                        fe -> fe.getField(),
+                        fe -> fe.getDefaultMessage() != null ? fe.getDefaultMessage() : "Invalid value",
+                        (a,b) -> a));
+        return resp(HttpStatus.BAD_REQUEST, "Validation failed", req.getRequestURI(), Map.of("fields", fieldErrors));
+    }
+
+    @ExceptionHandler(ConstraintViolationException.class)
+    @ResponseStatus(HttpStatus.BAD_REQUEST)
+    ErrorResponse handleConstraintViolation(ConstraintViolationException ex, HttpServletRequest req) {
+        var errs = ex.getConstraintViolations().stream()
+                .collect(java.util.stream.Collectors.toMap(
+                        v -> v.getPropertyPath().toString(),
+                        v -> v.getMessage(),
+                        (a,b)->a));
+        return resp(HttpStatus.BAD_REQUEST, "Validation failed", req.getRequestURI(), Map.of("violations", errs));
+    }
+
+    @ExceptionHandler({ HttpMessageNotReadableException.class })
+    @ResponseStatus(HttpStatus.BAD_REQUEST)
+    ErrorResponse handleBadBody(Exception ex, HttpServletRequest req) {
+        return resp(HttpStatus.BAD_REQUEST, "Malformed request body", req.getRequestURI(), Map.of());
+    }
+
+    @ExceptionHandler(NoSuchElementException.class)
+    @ResponseStatus(HttpStatus.NOT_FOUND)
+    ErrorResponse handleNotFound(NoSuchElementException ex, HttpServletRequest req) {
+        return resp(HttpStatus.NOT_FOUND, "Not found", req.getRequestURI(), Map.of());
+    }
+
+    @ExceptionHandler({ SecurityException.class, AccessDeniedException.class })
+    @ResponseStatus(HttpStatus.FORBIDDEN)
+    ErrorResponse handleForbidden(Exception ex, HttpServletRequest req) {
+        return resp(HttpStatus.FORBIDDEN, "Forbidden", req.getRequestURI(), Map.of());
+    }
+
+    @ExceptionHandler(DataIntegrityViolationException.class)
+    @ResponseStatus(HttpStatus.CONFLICT)
+    ErrorResponse handleConflict(DataIntegrityViolationException ex, HttpServletRequest req) {
+        return resp(HttpStatus.CONFLICT, "Conflict", req.getRequestURI(), Map.of());
+    }
+
+    @ExceptionHandler({ HttpRequestMethodNotSupportedException.class, HttpMediaTypeNotSupportedException.class })
+    @ResponseStatus(HttpStatus.METHOD_NOT_ALLOWED)
+    ErrorResponse handleMethod(Exception ex, HttpServletRequest req) {
+        return resp(HttpStatus.METHOD_NOT_ALLOWED, "Method not allowed", req.getRequestURI(), Map.of());
+    }
+
+    // Fallback (kept last)
+    @ExceptionHandler(Exception.class)
+    @ResponseStatus(HttpStatus.INTERNAL_SERVER_ERROR)
+    ErrorResponse handleOther(Exception ex, HttpServletRequest req) {
+        return resp(HttpStatus.INTERNAL_SERVER_ERROR, "Internal server error", req.getRequestURI(),
+                Map.of("hint","Check server logs"));
+    }
+}

src/main/java/se/urmo/hemhub/web/ProjectTaskController.java

@@ -2,6 +2,8 @@ package se.urmo.hemhub.web;
 
 import jakarta.validation.Valid;
 import lombok.RequiredArgsConstructor;
+import org.springframework.data.domain.Page;
+import org.springframework.data.domain.Pageable;
 import org.springframework.web.bind.annotation.*;
 import org.springframework.security.core.Authentication;
 import org.springframework.security.oauth2.jwt.Jwt;
@@ -9,6 +11,7 @@ import se.urmo.hemhub.domain.Task;
 import se.urmo.hemhub.dto.ProjectTaskDtos.*;
 import se.urmo.hemhub.service.ProjectTaskService;
 
+import java.time.LocalDate;
 import java.util.*;
 import static java.util.stream.Collectors.toList;
 
@@ -29,10 +32,9 @@ public class ProjectTaskController {
     }
 
     @GetMapping("/households/{householdId}/projects")
-    public List<ProjectResponse> listProjects(@PathVariable UUID householdId, Authentication auth) {
-        return svc.listProjects(householdId, sub(auth)).stream()
-                .map(p -> new ProjectResponse(p.getId(), p.getName(), p.getDescription()))
-                .collect(toList());
+    public Page<ProjectResponse> listProjects(@PathVariable UUID householdId, Authentication auth, Pageable pageable) {
+        return svc.listProjects(householdId, sub(auth), pageable)
+                .map(p -> new ProjectResponse(p.getId(), p.getName(), p.getDescription()));
     }
 
     @DeleteMapping("/projects/{projectId}")
@@ -54,8 +56,15 @@ public class ProjectTaskController {
     }
 
     @GetMapping("/projects/{projectId}/tasks")
-    public List<TaskResponse> listTasks(@PathVariable UUID projectId, Authentication auth) {
-        return svc.listTasks(projectId, sub(auth)).stream().map(this::toDto).collect(toList());
+    public Page<TaskResponse> listTasks(@PathVariable UUID projectId,
+                                        @RequestParam(required = false) String status,
+                                        @RequestParam(required = false) String priority,
+                                        @RequestParam(required = false) LocalDate dueFrom,
+                                        @RequestParam(required = false) LocalDate dueTo,
+                                        Authentication auth,
+                                        Pageable pageable) {
+        var filter = new TaskFilter(status, priority, dueFrom, dueTo);
+        return svc.listTasks(projectId, sub(auth), filter, pageable).map(this::toDto);
     }
 
     // -------- Tasks (household-scoped) --------
@@ -74,8 +83,15 @@ public class ProjectTaskController {
     }
 
     @GetMapping("/households/{householdId}/tasks")
-    public List<TaskResponse> listHouseholdTasks(@PathVariable UUID householdId, Authentication auth) {
-        return svc.listHouseholdTasks(householdId, sub(auth)).stream().map(this::toDto).collect(toList());
+    public Page<TaskResponse> listHouseholdTasks(@PathVariable UUID householdId,
+                                                 @RequestParam(required = false) String status,
+                                                 @RequestParam(required = false) String priority,
+                                                 @RequestParam(required = false) LocalDate dueFrom,
+                                                 @RequestParam(required = false) LocalDate dueTo,
+                                                 Authentication auth,
+                                                 Pageable pageable) {
+        var filter = new TaskFilter(status, priority, dueFrom, dueTo);
+        return svc.listHouseholdTasks(householdId, sub(auth), filter, pageable).map(this::toDto);
     }
 
     // -------- Task update (common) --------
@@ -95,17 +111,15 @@ public class ProjectTaskController {
         return toDto(t);
     }
 
+    // -------- Iteration 4 utility --------
+
+    @GetMapping("/tasks/due/tomorrow")
+    public List<TaskResponse> tasksDueTomorrow(Authentication auth) {
+        return svc.tasksDueTomorrowForUser(sub(auth)).stream().map(this::toDto).toList();
+    }
+
     private TaskResponse toDto(Task t) {
         return new TaskResponse(t.getId(), t.getTitle(), t.getDescription(),
                 t.getPriority().name(), t.getStatus().name(), t.getDueDate(), t.getAssigneeSub());
     }
-
-    @GetMapping("/tasks/due/tomorrow")
-    public List<TaskResponse> tasksDueTomorrow(Authentication auth) {
-        var todayPlus1 = java.time.LocalDate.now();
-        // Service method not required; use repository through a lightweight orchestrator or reuse a new service
-        // To keep controllers thin, we’ll delegate to svc via a tiny method (add this method in ProjectTaskService if you prefer).
-        var list = svc.tasksDueTomorrowForUser(sub(auth));
-        return list.stream().map(this::toDto).toList();
-    }
 }

src/test/http/hemhub-api.http

@@ -113,6 +113,37 @@ Authorization: Bearer {{token}}
 GET http://localhost:8080/api/v1/households/{{householdId}}/tasks
 Authorization: Bearer {{token}}
 
+### 15a) Prepare a {{tomorrow}} variable (YYYY-MM-DD)
+GET http://localhost:8080/public/info
+
+> {%
+    const d = new Date();
+    d.setDate(d.getDate() + 1);
+    const tomorrow = d.toISOString().slice(0,10);
+    client.global.set("tomorrow", tomorrow);
+%}
+
+### 15b) Capture latest household task id (if not already set)
+GET http://localhost:8080/api/v1/households/{{householdId}}/tasks?size=1&sort=createdAt,desc
+Authorization: Bearer {{token}}
+
+> {%
+    if (!client.global.get("taskId")) {
+        const id = response.body?.content?.length ? response.body.content[0].id : null;
+        if (id) client.global.set("taskId", id);
+    }
+%}
+
+### 15c) Set that task's dueDate to {{tomorrow}}
+PATCH http://localhost:8080/api/v1/tasks/{{taskId}}
+Content-Type: application/json
+Authorization: Bearer {{token}}
+
+{
+  "dueDate": "{{tomorrow}}"
+}
+
+
 ### 16) My tasks due tomorrow
 GET http://localhost:8080/api/v1/tasks/due/tomorrow
 Authorization: Bearer {{token}}

src/test/java/se/urmo/hemhub/integration/PagingAndFilteringIT.java

@@ -0,0 +1,101 @@
+package se.urmo.hemhub.integration;
+
+import com.jayway.jsonpath.JsonPath;
+import org.junit.jupiter.api.Test;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.autoconfigure.web.servlet.AutoConfigureMockMvc;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.http.MediaType;
+import org.springframework.test.context.ActiveProfiles;
+import org.springframework.test.web.servlet.MockMvc;
+
+import java.time.LocalDate;
+
+import static org.hamcrest.Matchers.*;
+import static org.springframework.security.test.web.servlet.request.SecurityMockMvcRequestPostProcessors.jwt;
+import static org.springframework.test.web.servlet.request.MockMvcRequestBuilders.*;
+import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.*;
+
+@SpringBootTest
+@AutoConfigureMockMvc
+@ActiveProfiles("test")
+class PagingAndFilteringIT {
+
+    @Autowired MockMvc mvc;
+
+    @Test
+    void list_tasks_supports_filters_and_pagination() throws Exception {
+        var user = jwt().jwt(j -> {
+            j.subject("sub-owner");
+            j.claim("email","o@ex.com");
+            j.claim("preferred_username","owner");
+        });
+
+        // 1) Household
+        var hh = mvc.perform(post("/api/v1/households").with(user)
+                        .contentType(MediaType.APPLICATION_JSON)
+                        .content("{\"name\":\"H1\"}"))
+                .andExpect(status().isOk())
+                .andReturn();
+        var householdId = JsonPath.read(hh.getResponse().getContentAsString(), "$.id");
+
+        // 2) Project (owner-only)
+        var pr = mvc.perform(post("/api/v1/projects").with(user)
+                        .contentType(MediaType.APPLICATION_JSON)
+                        .content("{\"householdId\":\"" + householdId + "\",\"name\":\"Sovrum\"}"))
+                .andExpect(status().isOk())
+                .andReturn();
+        var projectId = JsonPath.read(pr.getResponse().getContentAsString(), "$.id");
+
+        // 3) Create several tasks (mixed status/priority/due dates)
+        var tomorrow = LocalDate.now().plusDays(1);
+        var nextWeek = LocalDate.now().plusDays(7);
+
+        // Project tasks
+        mvc.perform(post("/api/v1/tasks").with(user)
+                        .contentType(MediaType.APPLICATION_JSON)
+                        .content("{\"projectId\":\""+projectId+"\",\"title\":\"A\",\"priority\":\"HIGH\",\"status\":\"OPEN\",\"dueDate\":\""+tomorrow+"\"}"))
+                .andExpect(status().isOk());
+        mvc.perform(post("/api/v1/tasks").with(user)
+                        .contentType(MediaType.APPLICATION_JSON)
+                        .content("{\"projectId\":\""+projectId+"\",\"title\":\"B\",\"priority\":\"LOW\",\"status\":\"DONE\",\"dueDate\":\""+nextWeek+"\"}"))
+                .andExpect(status().isOk());
+        mvc.perform(post("/api/v1/tasks").with(user)
+                        .contentType(MediaType.APPLICATION_JSON)
+                        .content("{\"projectId\":\""+projectId+"\",\"title\":\"C\",\"priority\":\"HIGH\",\"status\":\"IN_PROGRESS\",\"dueDate\":\""+nextWeek+"\"}"))
+                .andExpect(status().isOk());
+
+        // Household tasks (no project)
+        mvc.perform(post("/api/v1/households/"+householdId+"/tasks").with(user)
+                        .contentType(MediaType.APPLICATION_JSON)
+                        .content("{\"title\":\"D\",\"priority\":\"HIGH\",\"status\":\"OPEN\",\"dueDate\":\""+nextWeek+"\"}"))
+                .andExpect(status().isOk());
+        mvc.perform(post("/api/v1/households/"+householdId+"/tasks").with(user)
+                        .contentType(MediaType.APPLICATION_JSON)
+                        .content("{\"title\":\"E\",\"priority\":\"MEDIUM\",\"status\":\"OPEN\"}"))
+                .andExpect(status().isOk());
+
+        // 4) Filter: project tasks with priority=HIGH and dueTo=nextWeek, paged size=1
+        mvc.perform(get("/api/v1/projects/"+projectId+"/tasks")
+                        .with(user)
+                        .param("priority","HIGH")
+                        .param("dueTo", nextWeek.toString())
+                        .param("page","0")
+                        .param("size","1")
+                        .param("sort","title,asc"))
+                .andExpect(status().isOk())
+                .andExpect(jsonPath("$.content", hasSize(1)))
+                .andExpect(jsonPath("$.content[0].title", anyOf(is("A"), is("C"))))
+                .andExpect(jsonPath("$.totalElements", is(2))) // A and C match HIGH and due<=nextWeek
+                .andExpect(jsonPath("$.totalPages", is(2)));
+
+        // 5) Household tasks filtered: status=OPEN (should include D and E)
+        mvc.perform(get("/api/v1/households/"+householdId+"/tasks")
+                        .with(user)
+                        .param("status","OPEN")
+                        .param("sort","title,asc"))
+                .andExpect(status().isOk())
+                .andExpect(jsonPath("$.content[*].title", everyItem(anyOf(is("D"), is("E"), is("A")))))
+                .andExpect(jsonPath("$.content", hasSize(greaterThanOrEqualTo(2))));
+    }
+}

src/test/java/se/urmo/hemhub/integration/ProjectTaskControllerIT.java

@@ -2,9 +2,9 @@ package se.urmo.hemhub.integration;
 
 import com.jayway.jsonpath.JsonPath;
 import org.junit.jupiter.api.Test;
+import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.boot.test.autoconfigure.web.servlet.AutoConfigureMockMvc;
 import org.springframework.boot.test.context.SpringBootTest;
-import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.test.context.ActiveProfiles;
 import org.springframework.test.web.servlet.MockMvc;
 
@@ -36,30 +36,32 @@ class ProjectTaskControllerIT {
         // Create project
         var pRes = mvc.perform(post("/api/v1/projects").with(owner)
                         .contentType("application/json").content("{\"householdId\":\""+householdId+"\",\"name\":\"Sovrumsrenovering\"}"))
-                .andExpect(status().isOk()).andExpect(jsonPath("$.id").exists()).andReturn();
-        var projectId = com.jayway.jsonpath.JsonPath.read(pRes.getResponse().getContentAsString(), "$.id");
+                .andExpect(status().isOk())
+                .andExpect(jsonPath("$.id").exists())
+                .andReturn();
+        var projectId = JsonPath.read(pRes.getResponse().getContentAsString(), "$.id");
 
-        // List projects (should contain one)
+        // List projects (paged; expect first item name)
         mvc.perform(get("/api/v1/households/"+householdId+"/projects").with(owner))
                 .andExpect(status().isOk())
-                .andExpect(jsonPath("$[0].name").value("Sovrumsrenovering"));
+                .andExpect(jsonPath("$.content[0].name").value("Sovrumsrenovering"));
 
-        // Create a task
+        // Create a task (project-scoped)
         mvc.perform(post("/api/v1/tasks").with(owner)
                         .contentType("application/json")
                         .content("{\"projectId\":\""+projectId+"\",\"title\":\"Damsug soffan\",\"priority\":\"LOW\"}"))
                 .andExpect(status().isOk())
                 .andExpect(jsonPath("$.title").value("Damsug soffan"));
 
-        // List tasks
+        // List tasks (paged; expect first item priority)
         mvc.perform(get("/api/v1/projects/"+projectId+"/tasks").with(owner))
                 .andExpect(status().isOk())
-                .andExpect(jsonPath("$[0].priority").value("LOW"));
+                .andExpect(jsonPath("$.content[0].priority").value("LOW"));
 
-        // Update task status
-        var list = mvc.perform(get("/api/v1/projects/"+projectId+"/tasks").with(owner))
+        // Update task status → fetch list to get taskId from page content
+        var listJson = mvc.perform(get("/api/v1/projects/"+projectId+"/tasks").with(owner))
                 .andReturn().getResponse().getContentAsString();
-        var taskId = com.jayway.jsonpath.JsonPath.read(list, "$[0].id");
+        var taskId = JsonPath.read(listJson, "$.content[0].id");
 
         mvc.perform(patch("/api/v1/tasks/"+taskId).with(owner)
                         .contentType("application/json")

src/test/java/se/urmo/hemhub/integration/ValidationAndErrorHandlingIT.java

@@ -0,0 +1,85 @@
+package se.urmo.hemhub.integration;
+
+import com.jayway.jsonpath.JsonPath;
+import org.junit.jupiter.api.Test;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.autoconfigure.web.servlet.AutoConfigureMockMvc;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.http.MediaType;
+import org.springframework.test.context.ActiveProfiles;
+import org.springframework.test.web.servlet.MockMvc;
+
+import static org.springframework.security.test.web.servlet.request.SecurityMockMvcRequestPostProcessors.jwt;
+import static org.springframework.test.web.servlet.request.MockMvcRequestBuilders.*;
+import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.*;
+
+@SpringBootTest
+@AutoConfigureMockMvc
+@ActiveProfiles("test")
+class ValidationAndErrorHandlingIT {
+
+    @Autowired MockMvc mvc;
+
+    @Test
+    void create_household_task_without_title_returns_400_with_field_error() throws Exception {
+        var user = jwt().jwt(j -> {
+            j.subject("sub-user");
+            j.claim("email","user@example.com");
+            j.claim("preferred_username","user");
+        });
+
+        // Create household
+        var hh = mvc.perform(post("/api/v1/households").with(user)
+                        .contentType(MediaType.APPLICATION_JSON)
+                        .content("{\"name\":\"Test Household\"}"))
+                .andExpect(status().isOk())
+                .andReturn();
+        var householdId = JsonPath.read(hh.getResponse().getContentAsString(), "$.id");
+
+        // Try to create a household-level task with missing required 'title'
+        mvc.perform(post("/api/v1/households/" + householdId + "/tasks").with(user)
+                        .contentType(MediaType.APPLICATION_JSON)
+                        .content("{\"priority\":\"HIGH\"}"))
+                .andExpect(status().isBadRequest())
+                .andExpect(content().contentTypeCompatibleWith(MediaType.APPLICATION_JSON))
+                // Global error envelope
+                .andExpect(jsonPath("$.status").value(400))
+                .andExpect(jsonPath("$.message").value("Validation failed"))
+                .andExpect(jsonPath("$.path").value("/api/v1/households/" + householdId + "/tasks"))
+                // Field details from @RestControllerAdvice
+                .andExpect(jsonPath("$.details.fields.title").value("title is required"));
+    }
+
+    @Test
+    void update_task_with_invalid_enum_returns_400_with_message() throws Exception {
+        var user = jwt().jwt(j -> {
+            j.subject("sub-user2");
+            j.claim("email","u2@example.com");
+            j.claim("preferred_username","u2");
+        });
+
+        // Create household
+        var hh = mvc.perform(post("/api/v1/households").with(user)
+                        .contentType(MediaType.APPLICATION_JSON)
+                        .content("{\"name\":\"H2\"}"))
+                .andExpect(status().isOk())
+                .andReturn();
+        var householdId = JsonPath.read(hh.getResponse().getContentAsString(), "$.id");
+
+        // Create a valid household task
+        var tRes = mvc.perform(post("/api/v1/households/" + householdId + "/tasks").with(user)
+                        .contentType(MediaType.APPLICATION_JSON)
+                        .content("{\"title\":\"Valid task\"}"))
+                .andExpect(status().isOk())
+                .andReturn();
+        var taskId = JsonPath.read(tRes.getResponse().getContentAsString(), "$.id");
+
+        // Patch with an invalid status enum → should 400 (handled by @ControllerAdvice malformed body or enum conversion)
+        mvc.perform(patch("/api/v1/tasks/" + taskId).with(user)
+                        .contentType(MediaType.APPLICATION_JSON)
+                        .content("{\"status\":\"INVALID_ENUM\"}"))
+                .andExpect(status().isBadRequest())
+                .andExpect(jsonPath("$.status").value(400))
+                .andExpect(jsonPath("$.message").exists());
+    }
+}