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

tasker-server/tests/getUserTasks.test.ts

@@ -0,0 +1,120 @@
+const mockQueryTasks = jest.fn();
+
+import { handler } from "../src/handlers/getUserTasks";
+import { queryTasks } from "@/lib/util";
+
+jest.mock("@/lib/util", () => ({
+  queryTasks: mockQueryTasks,
+}));
+
+describe("getUserTasks handler", () => {
+  afterAll(() => {
+    jest.restoreAllMocks();
+  });
+
+  it("should retrieve tasks authored and assigned to the user and return a 200 response", async () => {
+    const mockAuthorTasks = [
+      { taskId: "task_1", title: "Authored Task 1" },
+      { taskId: "task_2", title: "Authored Task 2" },
+    ];
+    const mockAssigneeTasks = [
+      { taskId: "task_2", title: "Authored Task 2" }, // Duplicate task
+      { taskId: "task_3", title: "Assigned Task 3" },
+    ];
+
+    const mockUniqueTasks = [
+      { taskId: "task_1", title: "Authored Task 1" },
+      { taskId: "task_2", title: "Authored Task 2" },
+      { taskId: "task_3", title: "Assigned Task 3" },
+    ];
+
+    mockQueryTasks
+      .mockResolvedValueOnce(mockAuthorTasks)
+      .mockResolvedValueOnce(mockAssigneeTasks);
+
+    const event = {
+      pathParameters: { userId: "user_123" },
+    };
+
+    const response = await handler(event);
+
+    expect(queryTasks).toHaveBeenCalledWith(
+      "user_123",
+      "GSI-author-user-id",
+      "authorUserId"
+    );
+    expect(queryTasks).toHaveBeenCalledWith(
+      "user_123",
+      "GSI-assigned-user-id",
+      "assignedUserId"
+    );
+
+    expect(response).toEqual({
+      statusCode: 200,
+      headers: {
+        "Content-Type": "application/json",
+        "Access-Control-Allow-Origin": "*",
+      },
+      body: JSON.stringify(mockUniqueTasks),
+    });
+  });
+
+  it("should return a 500 response if queryTasks fails", async () => {
+    const mockError = new Error("Query failed");
+
+    mockQueryTasks.mockRejectedValueOnce(mockError);
+
+    const event = {
+      pathParameters: { userId: "user_123" },
+    };
+
+    const response = await handler(event);
+
+    expect(queryTasks).toHaveBeenCalledWith(
+      "user_123",
+      "GSI-author-user-id",
+      "authorUserId"
+    );
+
+    expect(response).toEqual({
+      statusCode: 500,
+      headers: {
+        "Content-Type": "application/json",
+        "Access-Control-Allow-Origin": "*",
+      },
+      body: JSON.stringify({
+        message: `Error retrieving tasks for user: ${mockError.message}`,
+      }),
+    });
+  });
+
+  it("should handle empty author and assignee tasks gracefully", async () => {
+    mockQueryTasks.mockResolvedValueOnce([]).mockResolvedValueOnce([]);
+
+    const event = {
+      pathParameters: { userId: "user_123" },
+    };
+
+    const response = await handler(event);
+
+    expect(queryTasks).toHaveBeenCalledWith(
+      "user_123",
+      "GSI-author-user-id",
+      "authorUserId"
+    );
+    expect(queryTasks).toHaveBeenCalledWith(
+      "user_123",
+      "GSI-assigned-user-id",
+      "assignedUserId"
+    );
+
+    expect(response).toEqual({
+      statusCode: 200,
+      headers: {
+        "Content-Type": "application/json",
+        "Access-Control-Allow-Origin": "*",
+      },
+      body: JSON.stringify([]),
+    });
+  });
+});