Test the Complete Application

This final lesson is about proving the pieces work together. Do not rewrite the project just because a test fails. Identify the smallest responsible piece, fix it, and rerun the affected test.

1. Test core generation

Generate several passwords and verify:

the value changes when Generate is pressed
the value length matches the slider
selected character categories are represented
selecting no categories still produces a valid password
a short length never causes a crash

If a test fails, inspect the console and trace the values through generatePassword().

2. Test strength and copy

Create passwords with different lengths and category counts. Confirm the strength bars, label, and badge respond.

Copy the current password and confirm the clipboard contains the exact displayed value. Then copy a historical value to verify the same reusable function works there.

3. Test history and persistence

Generate at least six passwords. Confirm only five newest unique values remain. Reload and confirm they return. Use Clear All, reload again, and confirm the list stays empty.

4. Test theme and Tips

Switch themes, reload, and confirm the preference remains. Open Tips, close it with the button, open it again, and close it with Escape.

5. Test Dice Mode

Press Dice Mode several times. Confirm the settings can change, a password is generated immediately, and the resulting password still follows the selected configuration.

6. Perform one uninterrupted regression pass

Run this complete workflow without refreshing until the end:

Change the length.
Change character options.
Generate.
Check strength.
Copy the password.
Generate more values.
Copy one from history.
Switch theme.
Open and close Tips.
Use Dice Mode.
Clear history.
Reload the page.

If a later feature breaks an earlier one, fix the smallest responsible piece and repeat that checkpoint.

Browser checks

Open the developer console and look for uncaught errors. Also resize the browser to a narrow width and confirm the prepared responsive interface still behaves correctly while all JavaScript controls remain usable.

Final checkpoint

SecureGen is complete when the major controls work together without console errors, history survives a reload until cleared, theme state persists, Dice Mode reuses the main generator, and the core generation rules hold across different settings.

You have completed the project by building and verifying each behavior incrementally rather than copying a finished application in one step.