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RSpec Rails Spickzettel

Ein Schnellreferenz-Leitfaden für rspec-rails: Model-Specs, Request-Specs, System-Specs, Route-Specs und Datenbanktransaktionen.

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rspec-rails integriert das RSpec-Testframework in Ruby on Rails.

Installation & Einrichtung

Zum Gemfile hinzufügen:

group :development, :test do
  gem 'rspec-rails', '~> 6.1.0'
end

Spec-Verzeichnisse initialisieren:

bin/rails generate rspec:install

Model-Specs (spec/models/)

require 'rails_helper'

RSpec.describe User, type: :model do
  it "is valid with valid attributes" do
    user = User.new(name: "Alice", email: "[email protected]")
    expect(user).to be_valid
  end

  it "is invalid without an email" do
    user = User.new(name: "Alice", email: nil)
    expect(user).not_to be_valid
    expect(user.errors[:email]).to include("can't be blank")
  end
end

Request-Specs (spec/requests/)

Request-Specs testen vollständige HTTP-Anfragezyklen:

require 'rails_helper'

RSpec.describe "Articles API", type: :request do
  describe "GET /articles" do
    it "returns HTTP success and lists articles" do
      get "/articles", headers: { "Accept" => "application/json" }

      expect(response).to have_http_status(:ok)
      json = JSON.parse(response.body)
      expect(json).to be_an(Array)
    end
  end
end

System-Specs mit Capybara

require 'rails_helper'

RSpec.describe "User Login", type: :system do
  before do
    driven_by(:selenium_chrome_headless)
  end

  it "allows user to sign in" do
    visit login_path
    fill_in "Email", with: "[email protected]"
    fill_in "Password", with: "secret123"
    click_button "Sign in"

    expect(page).to have_content("Welcome back!")
  end
end

Referenzen

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