add task service tests

Author: ColtonRandall

src/test/java/com/taskmanagerapi/TaskServiceTest.java

@@ -0,0 +1,118 @@
+package com.taskmanagerapi;
+
+import com.taskmanagerapi.dto.TaskResponse;
+import com.taskmanagerapi.exception.TaskNotFoundException;
+import com.taskmanagerapi.model.Task;
+import com.taskmanagerapi.model.TaskStatus;
+import com.taskmanagerapi.repository.TaskRepository;
+import com.taskmanagerapi.service.TaskService;
+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.util.List;
+import java.util.Optional;
+
+import static org.junit.jupiter.api.Assertions.*;
+import static org.mockito.Mockito.*;
+
+@ExtendWith(MockitoExtension.class)
+class TaskServiceTest {
+
+    @Mock
+    private TaskRepository taskRepository;
+
+    @InjectMocks
+    private TaskService taskService;
+
+    @Test
+    void addTask_returnsTaskResponse() {
+        Task task = new Task("Buy groceries", "Milk, eggs, bread");
+        when(taskRepository.save(any(Task.class))).thenReturn(task);
+
+        TaskResponse response = taskService.addTask("Buy groceries", "Milk, eggs, bread");
+
+        assertEquals("Buy groceries", response.getName());
+        assertEquals(TaskStatus.CREATED, response.getStatus());
+    }
+
+    @Test
+    void getTask_returnsTaskResponse_whenFound() {
+        Task task = new Task("Buy groceries", "Milk, eggs, bread");
+        when(taskRepository.findById(task.getId())).thenReturn(Optional.of(task));
+
+        TaskResponse response = taskService.getTask(task.getId());
+
+        assertEquals(task.getId(), response.getId());
+    }
+
+    @Test
+    void getTask_throwsTaskNotFoundException_whenNotFound() {
+        when(taskRepository.findById("bad-id")).thenReturn(Optional.empty());
+
+        assertThrows(TaskNotFoundException.class, () -> taskService.getTask("bad-id"));
+    }
+
+    @Test
+    void getAllTasks_returnsListOfTaskResponses() {
+        List<Task> tasks = List.of(
+                new Task("Task one", "Description one"),
+                new Task("Task two", "Description two")
+        );
+        when(taskRepository.findAll()).thenReturn(tasks);
+
+        List<TaskResponse> responses = taskService.getAllTasks();
+
+        assertEquals(2, responses.size());
+    }
+
+    @Test
+    void completeTask_setsStatusToDone() {
+        Task task = new Task("Buy groceries", "Milk, eggs, bread");
+        when(taskRepository.findById(task.getId())).thenReturn(Optional.of(task));
+
+        TaskResponse response = taskService.completeTask(task.getId());
+
+        assertEquals(TaskStatus.DONE, response.getStatus());
+    }
+
+    @Test
+    void deleteTask_setsStatusToDeleted() {
+        Task task = new Task("Buy groceries", "Milk, eggs, bread");
+        when(taskRepository.findById(task.getId())).thenReturn(Optional.of(task));
+
+        TaskResponse response = taskService.deleteTask(task.getId());
+
+        assertEquals(TaskStatus.DELETED, response.getStatus());
+    }
+
+    @Test
+    void undoDelete_setsStatusToCreated() {
+        Task task = new Task("Buy groceries", "Milk, eggs, bread");
+        task.setStatus(TaskStatus.DELETED);
+        when(taskRepository.findById(task.getId())).thenReturn(Optional.of(task));
+
+        TaskResponse response = taskService.undoDelete(task.getId());
+
+        assertEquals(TaskStatus.CREATED, response.getStatus());
+    }
+
+    @Test
+    void searchTaskByName_returnsTaskResponse_whenFound() {
+        Task task = new Task("Buy groceries", "Milk, eggs, bread");
+        when(taskRepository.findTaskByName("Buy groceries")).thenReturn(Optional.of(task));
+
+        TaskResponse response = taskService.searchTaskByName("Buy groceries");
+
+        assertEquals("Buy groceries", response.getName());
+    }
+
+    @Test
+    void searchTaskByName_throwsTaskNotFoundException_whenNotFound() {
+        when(taskRepository.findTaskByName("unknown")).thenReturn(Optional.empty());
+
+        assertThrows(TaskNotFoundException.class, () -> taskService.searchTaskByName("unknown"));
+    }
+}