# frozen_string_literal: true

require 'spec_helper'

describe Mongo::Operation::Aggregate do
  let(:options) do
    {}
  end

  let(:selector) do
    { aggregate: TEST_COLL,
      pipeline: [], }
  end
  let(:spec) do
    { selector: selector,
      options: options,
      db_name: SpecConfig.instance.test_db }
  end
  let(:op) { described_class.new(spec) }

  let(:context) { Mongo::Operation::Context.new }

  describe '#initialize' do
    context 'spec' do
      it 'sets the spec' do
        expect(op.spec).to be(spec)
      end
    end
  end

  describe '#==' do
    context 'when two ops have different specs' do
      let(:other_selector) do
        { aggregate: 'another_test_coll',
          pipeline: [], }
      end
      let(:other_spec) do
        { selector: other_selector,
          options: options,
          db_name: SpecConfig.instance.test_db,  }
      end
      let(:other) { described_class.new(other_spec) }

      it 'returns false' do
        expect(op).not_to eq(other)
      end
    end
  end

  describe '#execute' do
    context 'when the aggregation fails' do
      let(:selector) do
        { aggregate: TEST_COLL,
          pipeline: [ { '$invalid' => 'operator' } ], }
      end

      it 'raises an exception' do
        expect do
          op.execute(authorized_primary, context: context)
        end.to raise_error(Mongo::Error::OperationFailure)
      end
    end
  end
end
