Add additional assertions to existing tests

Ensure that the addAggregation function works correctly with an additional assertion check.

Author: danieljbruce

test/query.ts

@@ -69,7 +69,11 @@ describe('Query', () => {
  const aggregate2 = new AggregateQuery(query)
  .count('total')
  .count('total2');
+ const aggregate3 = new AggregateQuery(query)
+ .addAggregation(firstAggregation)
+ .addAggregation(secondAggregation);
  assert.deepStrictEqual(aggregate.aggregations, aggregate2.aggregations);
+ assert.deepStrictEqual(aggregate.aggregations, aggregate3.aggregations);
  assert.deepStrictEqual(aggregate.aggregations, [
  firstAggregation,
  secondAggregation,