Final Integration & Testing

WeatherNow is nearly complete. The final module is where you stop adding isolated features and verify that the entire application works as one connected experience.

You will trace the complete flow from a user’s action to the API request, state updates, rendered weather data, forecast, units, and visual theme. Then you will test the important real-world cases: valid and invalid city searches, loading states, API errors, location permissions, unit changes, saved preferences, and different weather conditions.

This module is also where you look for regressions. A feature that worked when you built it can break when another part of the application changes, so the final lessons deliberately revisit the major workflows before you call the project finished.

What to expect:

• Review the complete WeatherNow data flow.
• Test city search from start to finish.
• Test browser geolocation.
• Test Celsius/Fahrenheit switching and persistence.
• Test dynamic weather themes and effects.
• Exercise error and edge cases.
• Complete a final end-to-end test of the application.

When these checks pass, you will have taken the prepared WeatherNow interface all the way to a functioning React weather application powered by live data.