const { setDatabaseContents, CONTENTS } = TestHelpers.database;

describe('database()', () => {
  beforeEach(() => setDatabaseContents());

  describe('ref.set()', () => {
    it('returns a promise', async () => {
      const ref = firebase.database().ref('tests/types/number');
      const returnValue = ref.set(CONTENTS.DEFAULT.number);
      returnValue.should.be.Promise();

      const value = await returnValue;
      (value === null).should.be.true();
    });

    it('changes value', async () => {
      await Promise.all(
        Object.keys(CONTENTS.DEFAULT).map(async dataRef => {
          const previousValue = bridge.contextify(CONTENTS.DEFAULT[dataRef]);

          const ref = firebase.database().ref(`tests/types/${dataRef}`);

          const snapshot = await ref.once('value');
          snapshot.val().should.eql(previousValue);

          const newValue = bridge.contextify(CONTENTS.NEW[dataRef]);

          await ref.set(newValue);

          const snapshot2 = await ref.once('value');
          snapshot2.val().should.eql(newValue);
        })
      );
    });

    it('can unset values', async () => {
      await Promise.all(
        Object.keys(CONTENTS.DEFAULT).map(async dataRef => {
          const previousValue = bridge.contextify(CONTENTS.DEFAULT[dataRef]);
          const ref = firebase.database().ref(`tests/types/${dataRef}`);

          const snapshot = await ref.once('value');
          snapshot.val().should.eql(previousValue);

          await ref.set(null);
          const snapshot2 = await ref.once('value');
          (snapshot2.val() === null).should.be.true();
        })
      );
    });
  });
});