| RSpec.shared_examples_for "interface checker" do | |
| def diff_for(array_1, array_2) | |
| (array_1 - array_2) + (array_2 - array_1) | |
| end | |
| def arities_for(object) | |
| object.public_methods.map do |m| | |
| arity = object.method(m).arity | |
| [m, arity == -1 ? anything : arity] | |
| end |
| RSpec.shared_examples_for "check interface against canonical" do |canonical_interface, classes_to_check| | |
| classes_to_check.each do |class_to_check| | |
| example "#{class_to_check} conforms to the required interface", :aggregate_failures do | |
| interface_methods = canonical_interface.public_instance_methods(false) | |
| methods_to_check = class_to_check.public_instance_methods(false) | |
| diff = interface_methods - methods_to_check | |
| expect(diff).to be_empty, (<<~MESSAGE).split("\n").join(" ") | |
| Expected #{class_to_check} to be polymorphic with |
| [user] | |
| name = … | |
| email = … | |
| signingkey = |
Ideas are cheap. Make a prototype, sketch a CLI session, draw a wireframe. Discuss around concrete examples, not hand-waving abstractions. Don't say you did something, provide a URL that proves it.
Nothing is real until it's being used by a real user. This doesn't mean you make a prototype in the morning and blog about it in the evening. It means you find one person you believe your product will help and try to get them to use it.