Let's look again at the AddressValidator module we introduced in Chapter 1, Exploring Testability from Unit Tests to Behavior-Driven Development, so we can understand its structure better. We'll also use some basic RSpec features to improve the tests. Let's look at the spec code:
require 'rspec'
require_relative 'address_validator'
describe AddressValidator do
it "returns false for incomplete address" do
address = { street: "123 Any Street", city: "Anytown" }
expect(
AddressValidator.valid?(address)
).to eq(false)
end
it "missing_parts returns an array of missing required parts" do
address = { street: "123 Any Street", city: "Anytown" }
expect(
AddressValidator.missing_parts(address)
).to eq([:region, :postal_code, :country])
end
endWe defined a local variable address in each example. This is fine for simple, one-off values. We could get the same functionality shared across multiple tests with a local function defined...