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

tasker-server/tests/updateTaskStatus.test.ts

@@ -0,0 +1,120 @@
+const mockUpdate = jest.fn();
+
+import { handler } from "../src/handlers/updateTaskStatus"; // Adjust the path as needed
+
+jest.mock("@aws-sdk/lib-dynamodb", () => ({
+  DynamoDBDocument: {
+    from: jest.fn(() => ({
+      update: mockUpdate,
+    })),
+  },
+}));
+
+describe("updateTaskStatus handler", () => {
+  afterAll(() => {
+    jest.restoreAllMocks();
+  });
+
+  it("should update the task status and return the updated task", async () => {
+    const mockUpdatedTask = {
+      category: "tasks",
+      taskId: "task_123",
+      status: "Completed",
+    };
+
+    mockUpdate.mockResolvedValue({
+      Attributes: mockUpdatedTask,
+    });
+
+    const event = {
+      pathParameters: { taskId: "task_123" },
+      body: JSON.stringify({ status: "Completed" }),
+    };
+
+    const response = await handler(event);
+
+    expect(mockUpdate).toHaveBeenCalledWith({
+      TableName: "mock-task-table",
+      Key: {
+        category: "tasks",
+        taskId: "task_123",
+      },
+      UpdateExpression: "set #status = :status",
+      ExpressionAttributeNames: {
+        "#status": "status",
+      },
+      ExpressionAttributeValues: {
+        ":status": "Completed",
+      },
+      ReturnValues: "ALL_NEW",
+    });
+
+    expect(response).toEqual({
+      statusCode: 200,
+      headers: {
+        "Content-Type": "application/json",
+        "Access-Control-Allow-Origin": "*",
+      },
+      body: JSON.stringify(mockUpdatedTask),
+    });
+  });
+
+  it("should return a 500 response if the update fails", async () => {
+    const mockError = new Error("DynamoDB update error");
+    mockUpdate.mockRejectedValue(mockError);
+
+    const event = {
+      pathParameters: { taskId: "task_123" },
+      body: JSON.stringify({ status: "Completed" }),
+    };
+
+    const response = await handler(event);
+
+    expect(mockUpdate).toHaveBeenCalledWith({
+      TableName: "mock-task-table",
+      Key: {
+        category: "tasks",
+        taskId: "task_123",
+      },
+      UpdateExpression: "set #status = :status",
+      ExpressionAttributeNames: {
+        "#status": "status",
+      },
+      ExpressionAttributeValues: {
+        ":status": "Completed",
+      },
+      ReturnValues: "ALL_NEW",
+    });
+
+    expect(response).toEqual({
+      statusCode: 500,
+      headers: {
+        "Content-Type": "application/json",
+        "Access-Control-Allow-Origin": "*",
+      },
+      body: JSON.stringify({
+        message: `Error updating task: ${mockError.message}`,
+      }),
+    });
+  });
+
+  it("should handle invalid input gracefully", async () => {
+    const event = {
+      pathParameters: { taskId: "task_123" },
+      body: JSON.stringify({}),
+    };
+
+    const response = await handler(event);
+
+    expect(response).toEqual({
+      statusCode: 500,
+      headers: {
+        "Content-Type": "application/json",
+        "Access-Control-Allow-Origin": "*",
+      },
+      body: JSON.stringify({
+        message: `Error updating task: DynamoDB update error`,
+      }),
+    });
+  });
+});