Internship Report > Hands-on Lab > Test Results & Experimentation

Test Results & Experimentation

We conducted real-world testing to verify the correctness and performance of the entire deployed infrastructure solution, including private DNS routing through VPC Endpoints, S3 access control, DynamoDB/SQS integration, CloudWatch monitoring, and the overall application behavior running on the EC2/ALB backend.

Web Application Experience Video

The video below demonstrates the full workflow of the Web application on the deployed infrastructure: DNS routing to S3 through a private endpoint, exporting/downloading monthly transaction reports via S3, the Nova Money AI assistant with chat history stored on DynamoDB, asynchronous transaction processing through SQS, and the CloudWatch monitoring dashboard.

Mobile Testing

Real Request Testing

Access the domain botdevgroup.me to confirm the DNS record resolves correctly and the Money Manager homepage loads successfully through the deployed ALB/EC2 infrastructure.

**Figure 25. Money Manager homepage loading successfully via botdevgroup.me domain**

Send a test message to the Nova Money AI assistant to verify the chat flow works correctly and returns relevant suggestions.

**Figure 26. Testing conversation with the Nova Money AI assistant**

After chatting, run a Scan query on the chat_messages table in the DynamoDB Console to confirm all 6 messages from the test session (role: user/assistant) were recorded correctly, proving the chat history flow through DynamoDB is working as expected.

**Figure 27. DynamoDB chat_messages table scan results confirming chat history was saved**

Perform the “Export Excel” action on the Report page to test the asynchronous processing flow (EC2 API pushes job to SQS -> Worker processes -> Lambda generates file -> saves to S3). The browser successfully receives and downloads the file report-2026-6-59ffa92d.xlsx.

**Figure 28. Excel report file exported and downloaded successfully after SQS + Lambda processing**

Open the downloaded Excel file to verify the data: the content matches exactly with the “Monthly salary” transaction (5,000,000 VND, dated 30/06/2026) entered in the system.

**Figure 29. Exported Excel content matches the transaction data in the system**

Log & Metric Monitoring via CloudWatch

In the CloudWatch Console, the EC2ErrorAlarm (based on the Metric Filter reading error logs from the Log Group /aws/ec2/moneymanager-app) is in normal monitoring state.

**Figure 30. CloudWatch Alarms list, EC2ErrorAlarm is being monitored**

View the detailed metric chart for EC2ErrorCount over the last 3 hours: the alarm threshold is configured as “EC2ErrorCount >= 1 in 1 datapoint / 5 minutes”. The alarm shows Insufficient data because the application logs during the test period did not generate any error lines (no datapoint to evaluate), confirming the Metric Filter and Alarm are configured and working correctly, ready to transition to ALARM state and send SNS notifications as soon as actual errors are logged.

**Figure 31. Detailed EC2ErrorCount metric chart of the EC2ErrorAlarm**

Mobile Application Testing

Using the same dataset and backend tested above, the Mobile application (React Native Expo) is tested directly on device to confirm all core business flows work consistently with the Web version.

Experience it here: https://mobile.botdevgroup.me/

Mobile Dashboard overview showing balance, income/expense and financial chart for June 2026 — **Figure 32. Mobile Dashboard overview showing balance, income/expense and financial chart**

**Figure 33. Mobile Add Category screen for classifying income/expense transactions**

**Figure 34. Mobile Expense History screen with overview chart and add transaction button**

**Figure 35. Mobile Income History screen with corresponding overview chart**

**Figure 36. Mobile Transaction Calendar screen marking days with expense activity**

**Figure 37. Mobile Budget screen for setting spending limits by category and month**

Mobile Forecast screen showing next month's spending forecast compared to historical average — **Figure 38. Mobile Forecast screen showing next month’s spending forecast compared to historical average**

**Figure 39. Mobile chat screen with Nova Money AI assistant**

**Figure 40. Mobile Account screen showing user information and financial management options**

**Figure 41. Mobile Settings screen with notification options and logout**

Test the Excel report export feature on Mobile: on the Income History screen, select the “All” time period and export file income_report_all_months.xlsx, the system correctly displays the app selection dialog to open/share the file.

**Figure 42. Mobile income report export screen with income_report_all_months.xlsx file**

Similarly, on the Expense History screen, select the “This month” time period and export file expense_report_7_2026.xlsx, confirming the expense report export flow on Mobile works correctly.

**Figure 43. Mobile expense report export screen with expense_report_7_2026.xlsx file**

Result: the Dashboard, Categories, Income/Expense History, Calendar, Budget, Forecast, Nova Money AI assistant, and Account screens on Mobile all display and sync data correctly with the shared backend deployed on AWS.

Expected Results

All of the above test flows (DNS routing through VPC Endpoint, AI chat + DynamoDB history storage, asynchronous report export via SQS/Lambda/S3, log/metric monitoring via CloudWatch, and all core Mobile business screens) produced correct results as designed, confirming that the infrastructure deployed in section 5.3 operates stably end-to-end on both Web and Mobile platforms.