let(:segment) { create(:segment) }

let!(:rule1) do
  Rule.create!(segment: segment, filter_key: 'generic',
               attr_name: 'first_name', operator: '=', values: ['john'])
end

let!(:rule2) do
  Rule.create!(segment: segment, filter_key: 'generic',
               attr_name: 'orders_count', operator: '>=', values: ['3'])
end

let(:actual_query) { segment.customers.to_sql }
let(:expected_query) do
  Customer
    .where('first_name = john')
    .where('orders_count >= 3')
    .to_sql
end

it 'applies all the rules scopes to customer' do
  expect(actual_query).to eq(expected_query)
end

expected: "SELECT "customers".* FROM "customers" WHERE (orders_count >= '3') AND (first_name = 'john')"

    got: "SELECT "customers".* FROM "customers" WHERE (first_name = 'john') AND (orders_count >= '3')"
 (compared using ==)