feat: Add Jest configuration and tests for project and user handlers

tasker-server/tests/createTask.test.ts

@@ -0,0 +1,122 @@
+const mockPut = jest.fn();
+
+import { handler } from "../src/handlers/createTask";
+import { v4 as uuidv4 } from "uuid";
+
+jest.mock("@aws-sdk/lib-dynamodb", () => ({
+  DynamoDBDocument: {
+    from: jest.fn(() => ({
+      put: mockPut,
+    })),
+  },
+}));
+jest.mock("uuid", () => ({
+  v4: jest.fn(),
+}));
+
+describe("createTask handler", () => {
+  afterAll(() => {
+    jest.restoreAllMocks();
+  });
+
+  it("should create a new task and return 201 response", async () => {
+    const mockUUID = "mock-uuid";
+    (uuidv4 as jest.Mock).mockReturnValue(mockUUID);
+
+    const event = {
+      body: JSON.stringify({
+        title: "Test Task",
+        description: "This is a test task.",
+        status: "In Progress",
+        priority: "High",
+        tags: ["test", "jest"],
+        startDate: "2024-01-01",
+        dueDate: "2024-01-15",
+        points: 5,
+        projectId: "project_12345",
+        authorUserId: "user_abc",
+        assignedUserId: "user_xyz",
+      }),
+    };
+
+    mockPut.mockResolvedValue({});
+
+    const response = await handler(event);
+
+    expect(mockPut).toHaveBeenCalledWith({
+      TableName: "mock-task-table",
+      Item: {
+        category: "tasks",
+        taskId: `task_${mockUUID}`,
+        title: "Test Task",
+        description: "This is a test task.",
+        status: "In Progress",
+        priority: "High",
+        tags: ["test", "jest"],
+        startDate: "2024-01-01",
+        dueDate: "2024-01-15",
+        points: 5,
+        projectId: "project_12345",
+        authorUserId: "user_abc",
+        assignedUserId: "user_xyz",
+      },
+    });
+
+    expect(response).toEqual({
+      statusCode: 201,
+      headers: {
+        "Content-Type": "application/json",
+        "Access-Control-Allow-Origin": "*",
+      },
+      body: JSON.stringify({
+        category: "tasks",
+        taskId: `task_${mockUUID}`,
+        title: "Test Task",
+        description: "This is a test task.",
+        status: "In Progress",
+        priority: "High",
+        tags: ["test", "jest"],
+        startDate: "2024-01-01",
+        dueDate: "2024-01-15",
+        points: 5,
+        projectId: "project_12345",
+        authorUserId: "user_abc",
+        assignedUserId: "user_xyz",
+      }),
+    });
+  });
+
+  it("should return 500 response on error", async () => {
+    const event = {
+      body: JSON.stringify({
+        title: "Test Task",
+        description: "This is a test task.",
+        status: "In Progress",
+        priority: "High",
+        tags: ["test", "jest"],
+        startDate: "2024-01-01",
+        dueDate: "2024-01-15",
+        points: 5,
+        projectId: "project_12345",
+        authorUserId: "user_abc",
+        assignedUserId: "user_xyz",
+      }),
+    };
+
+    const mockError = new Error("DynamoDB error");
+    mockPut.mockRejectedValue(mockError);
+
+    const response = await handler(event);
+
+    expect(response).toEqual({
+      statusCode: 500,
+      headers: {
+        "Content-Type": "application/json",
+        "Access-Control-Allow-Origin": "*",
+      },
+      body: JSON.stringify({
+        message: `Error creating task: ${mockError.message}`,
+      }),
+    });
+  });
+});