filter_spec.rb

require "rails_helper"

describe Filter do
  let(:filter) { Filter.new(User) }

  it "can be initialized" do
    expect(filter).to be_a(Filter)
  end

  it "has no rows by default" do
    expect(filter.rows).to be_empty
  end

  describe "#result" do
    let(:results) { filter.results }

    let!(:chris){ create(:user, first_name: "Chris") }
    let!(:trish){ create(:user, first_name: "Trish") }
    let!(:james){ create(:user, first_name: "James") }

    context "given no rows" do
      it "returns all results" do
        expect(results.count).to eql(3)
        expect(results).to include(chris, trish, james)
      end
    end

    context "given a single row" do
      context "and a single column" do
        before do
          filter.add_row({first_name: {eq: "Chris"}})
        end

        it "returns the result" do
          expect(results).to eq([chris])
        end
      end
    end
  end
end