April 2024
Beginner to intermediate
224 pages
5h 7m
English
Content preview from From Ruby to Elixir
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Test an Ecto Query
It’s simple to test code that uses database queries. We need to use a special test case that’s provided to us by the Phoenix generator. This includes transactional test cases, which means that our test database is cleaned up after each test.
We’ll test the ContactStore module because it has functions for retrieving and writing data. We will skip SmsMessageStore because it has many more functions. But the book’s provided code (phone_app folder) has tests for the entire application.
Create test/phone_app/conversations/query/contact_store_test.exs and add the following code:
| 1: | defmodule PhoneApp.Conversations.Query.ContactStoreTest do |
| - | use PhoneApp.DataCase, ... |
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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.