Comprehensive Front-End UI Component Testing Checklist

Web front‑end page testing commonly focuses on basic controls; understanding typical controls and their testing methods is essential to avoid missing test cases. Based on daily work, the following testing scenarios for various controls are summarized.

Tree Control

1. Different icons represent each hierarchy level; the lowest node has no expand/collapse sign.

2. Provide "collapse all" and "expand all" functions.

3. If needed, offer search and right‑click functions with appropriate prompts.

4. Content refreshes correctly when expanded.

5. The number of displayed items matches the database.

Line Chart

1. Chart dimensions meet expectations.

2. For charts with a time axis, verify the interval is as expected.

3. When a day has no data but other days do, ensure the chart displays correctly.

4. Different curves are distinguished by color.

5. Hovering over a curve shows the data point.

6. Changing the time range updates the chart data automatically and correctly.

7. Real‑time line charts display live data accurately.

Donut Chart

1. Percentage values display correctly.

2. The central numeric label displays fully without truncation.

3. Non‑zero percentages match expected proportions.

4. Colors of multiple items correspond to their legends.

5. Verify display for 100% and 0% cases.

6. Hovering shows a tooltip with the correct value.

7. Selecting different time ranges updates the chart content correctly.

Tree Diagram

1. Expand/collapse works correctly.

2. Multi‑level expansion shows a scrollbar when content exceeds one screen.

3. All levels can be fully expanded and displayed properly.

4. Display when there is no data.

5. Display differences between single‑level and multi‑level trees.

6. Changing the time range updates the diagram data correctly.

Map

1. Data blocks match stored data.

2. Hover tooltip displays correct information.

3. Changing the time range updates the map data correctly.

4. Map regions correspond to table data.

5. Color representation for regions with no data.

Bar Chart

1. Display when data is empty.

2. Large differences between bar values (e.g., 1000 vs 1) are displayed correctly.

3. Bar range segmentation matches expectations.

4. Hover tooltip shows correct content.

5. Changing the time range updates the chart data correctly.

File Upload/Download

Upload:

1. Correct file type and size; upload succeeds; UI feedback is correct.

2. Oversized files: check processing speed and progress bar.

3. Upload empty file.

4. Upload extremely large file and verify handling.

5. Incorrect file type shows proper error message.

6. Upload a file that is currently in use.

7. Manual file name entry works, handling both existing and non‑existing paths.

8. Multiple successive uploads only keep the last selected file.

9. Excel files: verify column count, data types, empty rows, duplicate fields, etc.

Download:

1. Right‑click download works.

2. Tool‑based download saves file correctly.

3. Files without required tools show appropriate prompts.

4. In‑page preview displays correctly and looks good.

5. Download count is recorded.

6. Files with restricted permissions can be downloaded when allowed.

Image Upload/Download

1. Validate allowed and disallowed image types.

2. Validate image size and empty file handling.

3. Upload a correct image successfully.

4. Upload an image that is currently open; ensure success.

5. Manual entry of existing and non‑existing image URLs is validated.

6. After successful upload, thumbnail displays correctly; on failure, proper error message appears.

7. Re‑uploading overwrites previous image as expected.

8. Uploading the same image multiple times prompts duplicate warning.

9. Large image upload response time is acceptable.

10. Downloaded image size and type are correct.

11. Downloaded image opens without issues.

URL Checks

1. URL domain consistency.

2. URL length limits.

3. Modifying GET parameters still allows successful fetch.

4. URL links navigate to the intended page.

5. Security‑related URLs verify correct HTTP/HTTPS usage.

6. URL interactions (click, right‑click, direct entry) are all handled properly.

7. Invalid URLs display user‑friendly error pages.

8. System‑generated URL parameters are correct and encrypted if needed.

IP Input Fields

1. Correctly formatted IP addresses are accepted.

2. Incorrectly formatted IPs are rejected.

3. Number of IP entries matches expectations.

4. Duplicate IP entries are handled appropriately.

5. Non‑numeric characters are rejected.

6. Wildcard "*" is supported for any octet.