react-native-firebase/bridge/e2e/database/snapshot.e2e.js

const { setDatabaseContents } = TestHelpers.database;

// TODO use testRunId in refs to prevent multiple test instances interfering with each other
describe('database()', () => {
  describe('Snapshot', () => {
    before(() => setDatabaseContents());

    it('should provide a functioning val() method', async () => {
      const snapshot = await firebase
        .database()
        .ref('tests/types/array')
        .once('value');

      snapshot.val.should.be.a.Function();
      snapshot.val().should.eql(bridge.Array([0, 1, 2, 3, 4, 5, 6, 7, 8, 9]));
    });

    it('should provide a functioning child() method', async () => {
      const snapshot = await firebase
        .database()
        .ref('tests/types/array')
        .once('value');

      snapshot.child('0').val.should.be.a.Function();
      snapshot
        .child('0')
        .val()
        .should.equal(0);
      snapshot.child('0').key.should.be.a.String();
      snapshot.child('0').key.should.equal('0');
    });

    // TODO refactor
    it('should provide a functioning hasChild() method', async () => {
      const snapshot = await firebase
        .database()
        .ref('tests/types/object')
        .once('value');

      snapshot.hasChild.should.be.a.Function();
      snapshot.hasChild('foo').should.equal(true);
      snapshot.hasChild('baz').should.equal(false);
    });

    it('should provide a functioning hasChildren() method', async () => {
      const snapshot = await firebase
        .database()
        .ref('tests/types/object')
        .once('value');

      snapshot.hasChildren.should.be.a.Function();
      snapshot.hasChildren().should.equal(true);
      snapshot
        .child('foo')
        .hasChildren()
        .should.equal(false);
    });

    it('should provide a functioning exists() method', async () => {
      const snapshot = await firebase
        .database()
        .ref('tests/types/object/baz/daz')
        .once('value');

      snapshot.exists.should.be.a.Function();
      snapshot.exists().should.equal(false);
    });

    it('should provide a functioning getPriority() method', async () => {
      const ref = firebase.database().ref('tests/priority');
      const snapshot = await ref.once('value');
      snapshot.getPriority.should.be.a.Function();
      snapshot.getPriority().should.equal(666);
      snapshot.val().should.eql(bridge.Object({ foo: 'bar' }));
    });

    it('should provide a functioning forEach() method', async () => {
      const snapshot = await firebase
        .database()
        .ref('tests/types/array')
        .once('value');

      let total = 0;
      snapshot.forEach.should.be.a.Function();
      snapshot.forEach(childSnapshot => {
        const val = childSnapshot.val();
        total += val;
        return val === 3; // stop iteration after key 3
      });

      total.should.equal(6); // 0 + 1 + 2 + 3 = 6
    });

    it('should provide a key property', async () => {
      const snapshot = await firebase
        .database()
        .ref('tests/types/array')
        .once('value');

      snapshot.key.should.be.a.String();
      snapshot.key.should.equal('array');
    });
  });
});