Firestore security rules are set up and tested in the Firebase console. Begin by navigating to the Firestore Database section, then click on “Rules”. Here you can write your custom rules using a syntax similar to JavaScript. Rules should be structured around matching path patterns with wildcard expressions, followed by allowing or denying read/write operations based on conditions.
For testing, use the built-in simulator within the Firebase console. This allows you to simulate reads, writes, and deletes under different authentication states without affecting live data. Alternatively, for more complex tests, utilize the local emulator suite provided by Firebase CLI.
To ensure robustness, consider edge cases and potential vulnerabilities when writing and testing your rules. Regularly review and update them as your application evolves.
