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

tasker-server/tests/createProject.test.ts

@@ -0,0 +1,94 @@
+const mockPut = jest.fn();
+
+import { handler } from "../src/handlers/createProject";
+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("handler", () => {
+  afterAll(() => {
+    jest.restoreAllMocks();
+  });
+
+  it("should create a new project and return 201 response", async () => {
+    const mockUUID = "mock-uuid";
+    (uuidv4 as jest.Mock).mockReturnValue(mockUUID);
+
+    const event = {
+      body: JSON.stringify({
+        name: "Test Project",
+        description: "This is a test project.",
+        startDate: "2024-01-01",
+        endDate: "2024-12-31",
+      }),
+    };
+
+    mockPut.mockResolvedValue({});
+
+    const response = await handler(event);
+
+    expect(mockPut).toHaveBeenCalledWith({
+      TableName: "mock-project-table",
+      Item: {
+        category: "projects",
+        projectId: `project_${mockUUID}`,
+        name: "Test Project",
+        description: "This is a test project.",
+        startDate: "2024-01-01",
+        endDate: "2024-12-31",
+      },
+    });
+
+    expect(response).toEqual({
+      statusCode: 201,
+      headers: {
+        "Content-Type": "application/json",
+        "Access-Control-Allow-Origin": "*",
+      },
+      body: JSON.stringify({
+        category: "projects",
+        projectId: `project_${mockUUID}`,
+        name: "Test Project",
+        description: "This is a test project.",
+        startDate: "2024-01-01",
+        endDate: "2024-12-31",
+      }),
+    });
+  });
+
+  it("should return 500 response on error", async () => {
+    const event = {
+      body: JSON.stringify({
+        name: "Test Project",
+        description: "This is a test project.",
+        startDate: "2024-01-01",
+        endDate: "2024-12-31",
+      }),
+    };
+
+    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 project: ${mockError.message}`,
+      }),
+    });
+  });
+});