Table-Driven Testing

Transcript

1. Table-Driven Testing
2. a.k.a Data-Driven Testing Keyword-Driven Testing
3. Table de conditions
4. Cucumber
5. Scenario Outline: eating! Given there are <start> cucumbers! When I eat <eat> cucumbers! Then I should have <left> cucumbers! ! Examples:! | start | eat | left |! | 12 | 5 | 7 |! | 20 | 5 | 15 |!
6. Validations • Utilisation de matchers : it { should validate_presence_of(:title) } • Tests individuels pour chaque validation • Tests avec des factories
7. it "should have valid factory" do! FactoryGirl.build(:user).should be_valid! end! ! it "should require a name" do! FactoryGirl.build(:user, name: "").should_not be_valid! end
8. En création ? mis à jour ? Autre action spéciale ?
9. describe User do! describe ".create" do! it "persists a user with valid attributes" do! user = User.create(name: "Jane")! ! expect(user).to be_persisted! end! ! it "does not persist if attributes are not valid" do! user = User.create! ! expect(user).not_to be_persisted! expect(user.errors[:name]).to include("can't be blank")! end! end! end!
10. C’est mieux mais il manque des données
11. describe User do! describe ".create" do! def invalid_examples! [! { attributes: FactoryGirl.attributes_for(:user, name: ""), errors: { name: ["can't be blank"] } },! { attributes: FactoryGirl.attributes_for(:user, email: "janeATicloudDOTcom"), errors: { email: ["is invalid."] } }! ]! end! ! it "persists a user with valid attributes" do! user = User.create(FactoryGirl.attributes_for(:user))! ! expect(user).to be_persisted! end! ! it "does not persist if attributes are not valid" do! invalid_examples.each do |example|! user = User.create(example[:attributes])! ! expect(user).not_to be_persisted! expect(user.errors).to eq(example[:errors])! end! end! end! end!
12. Conditions de création dans un seul bloc
13. Parfait pour tester des petits objets/services
14. Très efficace pour des tests d’ingrétation d’APIs
15. Conclusion • Clarté • Maintenabilité • Force à faire des méthodes simples… • …et des vrais tests • Utilisable dans n’importe quel langage
16. • http://solnic.eu/2014/01/06/tdd-and-activerecord-in- rails.html • https://code.google.com/p/go-wiki/wiki/ TableDrivenTests • http://dave.cheney.net/2013/06/09/writing-table- driven-tests-in-go
17. @nmerouze http://merouze.me nicolas@merouze.me