April 2016
Intermediate to advanced
222 pages
4h 30m
English
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Using let and context
This scenario is very common, and inevitably will make the test harder to read, increasing the potential for misunderstanding the intent, which in turn will increase the likelihood of mistakes being made when the test or related code is changed. Before we see how to improve the test, we will learn about the let helper:
describe AddressValidator do let(:address) { {street: "123 Any Street", city: "Anytown"} } it "valid? returns false for incomplete address" do expect(AddressValidator.valid?(address)).to eq(false) end it "missing_parts returns an array of missing required parts" do expect( AddressValidator.missing_parts(address) ).to eq([:region, :postal_code, :country]) end context "invalid characters in value" do let(:address){ ...Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.