Testing - React Native SDK

Clean Up Tests

When testing the Realm React Native SDK, you must close realms with Realm.close() after you're done with them to prevent memory leaks.

You should also delete the realm file with Realm.deleteFile() during clean up to keep your tests idempotent.

The below example uses the Jest testing framework. It uses Jest's built-in beforeEach() and afterEach() hooks for test set up and tear down, respectively.

const config = {
  schema: [Car],
  path: "testing.realm",
};
let realm;
beforeEach(async () => {
  realm = await Realm.open(config);
});
afterEach(() => {
  if (!realm.isClosed) {
    realm.close();
  }
  if (config) {
    Realm.deleteFile(config);
  }
});
test("Close a Realm", async () => {
  expect(realm.isClosed).toBe(false);
  realm.close();
  expect(realm.isClosed).toBe(true);
});