157 lines
4.2 KiB
Ruby
157 lines
4.2 KiB
Ruby
# typed: false
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# frozen_string_literal: true
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require "spec_helper"
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RSpec.describe "loading optimizations" do
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context "cars table" do
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before do
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Car.create!(name: "Toyota Camry", fuel_type: "gasoline", engine_size: 2.0)
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Car.create!(name: "Toyota Prius", fuel_type: "hybrid", engine_size: 1.5)
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Car.create!(
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name: "Toyota Corolla",
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fuel_type: "electric",
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engine_size: 1.8
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)
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end
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shared_examples "queries only the aux table" do
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it "queries only the aux table" do
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expect(@queries.length).to eq(1)
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expect(@queries.first).not_to include("JOIN")
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expect(@queries.first).to match(/\bvehicles_car_aux\b/)
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expect(@queries.first).not_to match(/\bvehicles\b/)
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end
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end
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shared_examples "queries both tables" do
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it "queries both tables" do
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expect(@queries.length).to eq(1)
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expect(@queries.first).to include("JOIN")
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expect(@queries.first).to match(/\bvehicles\b/)
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expect(@queries.first).to match(/\bvehicles_car_aux\b/)
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end
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end
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describe "pluck" do
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context "aux columns are referenced" do
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before do
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@queries =
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SpecHelper.capture_queries do
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expect(Car.pluck(:fuel_type)).to eq(%w[gasoline hybrid electric])
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end
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end
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it_behaves_like "queries only the aux table"
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end
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context "aux columns are chained on a where clause" do
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before do
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@queries =
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SpecHelper.capture_queries do
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expect(Car.where(engine_size: 1.4..1.9).pluck(:fuel_type)).to eq(
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%w[hybrid electric]
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)
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end
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end
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it_behaves_like "queries only the aux table"
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it "applies the BETWEEN clause" do
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expect(@queries.first).to include("BETWEEN")
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end
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end
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context "main table columns are referenced" do
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before do
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@queries =
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SpecHelper.capture_queries do
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expect(Car.where(name: "Toyota Camry").pluck(:fuel_type)).to eq(
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%w[gasoline]
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)
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end
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end
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it_behaves_like "queries both tables"
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end
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context "main table columns are chained on a where clause" do
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before do
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@queries =
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SpecHelper.capture_queries do
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expect(Car.where(name: "Toyota Camry").pluck(:fuel_type)).to eq(
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%w[gasoline]
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)
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end
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end
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it_behaves_like "queries both tables"
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end
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context "multiple columns" do
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before do
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@queries =
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SpecHelper.capture_queries do
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expect(Car.pluck(:fuel_type, :engine_size)).to eq(
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[["gasoline", 2.0], ["hybrid", 1.5], ["electric", 1.8]]
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)
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end
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end
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it_behaves_like "queries only the aux table"
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end
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end
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describe "maximum" do
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context "aux columns are referenced" do
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before do
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@queries =
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SpecHelper.capture_queries do
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expect(Car.maximum(:engine_size)).to eq(2.0)
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end
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end
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it_behaves_like "queries only the aux table"
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end
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context "aux columns are chained on a where clause" do
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before do
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@queries =
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SpecHelper.capture_queries do
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expect(
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Car.where(engine_size: 1.4..1.9).maximum(:engine_size)
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).to eq(1.8)
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end
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end
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it_behaves_like "queries only the aux table"
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end
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context "main table columns are referenced" do
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before do
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@queries =
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SpecHelper.capture_queries do
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expect(
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Car.where(name: "Toyota Camry").maximum(:engine_size)
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).to eq(2.0)
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end
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end
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it_behaves_like "queries both tables"
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end
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context "main table columns are chained on a where clause" do
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before do
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@queries =
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SpecHelper.capture_queries do
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expect(
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Car.where(name: "Toyota Camry").maximum(:engine_size)
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).to eq(2.0)
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end
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end
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it_behaves_like "queries both tables"
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end
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end
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end
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end
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