tdd - Is there an rspec test for exact length of an attribute? -


i'm trying test length of zip code attribute ensure 5 characters long. right i'm testing make sure not blank , short 4 characters , long 6 characters.

is there way test being 5 characters? far i've found nothing online or in rspec book.

if you're testing validation on activerecord model, recommend trying out shoulda-matchers. provides bunch of useful rspec extensions useful rails. write simple 1 line spec zip code attribute:

describe address   { should ensure_length_of(:zip_code).is_equal_to(5).with_message(/invalid/) } end

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