Latest #testing Threads 
Tired of waiting for slow Ecto sandbox tests ?
At work, we have 45,000 tests - taking 12 minutes on a fast laptop and ~45 minutes of ela...
New
Wallabidi is a concurrent browser testing for Elixir. You write a test once and it runs on the cheapest driver that supports it — from an...
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Skuld started out as a limited exploratory project, and then it snowballed…
Most Elixir apps have a layer of orchestration code bridging...
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Łukasz wrote a great article, 'guiding not ruling’ the way of writing tests. I agree with everything, short of his attitude to mocks. The...
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I wanted to write down some of the main guides I use when writing Elixir tests, so I have summarised them in blogpost.
Furthermore, I th...
New
Episode 301 of Thinking Elixir. News includes Phoenix LiveDebugger hitting v1.0 with an interactive tour to go along with it, LiveStash v...
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Hello there.
I’m wondering if people have any tips for doing TDD with Elixir.
I am specifically wondering if it is possible to configur...
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Thanks to Brian @bglusman who provided a very valuable PR to this library, I am to introduce the mutation-testing library for BEAM langua...
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Perhaps oddly, this is the first time I’ve hit this situation in Elixir: I would like to test that a function has only been called once. ...
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<?xml version="1.0"?>
<!DOCTYPE tsung SYSTEM "tsung-1.0.dtd">
<tsung loglevel="warning" version="1.0">
<clients...
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This Week's Trending
This Month's Trending
Hi,
I am happy to release the Repatch library for mocking and patching implementation in tests and anywhere else. It brings new possibili...
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We just published PaperTiger, a mock Stripe server we built to solve real pain points in our test suite.
The Problem
Testing Stripe int...
New
Wallabidi is a concurrent browser testing for Elixir. You write a test once and it runs on the cheapest driver that supports it — from an...
New
Tired of waiting for slow Ecto sandbox tests ?
At work, we have 45,000 tests - taking 12 minutes on a fast laptop and ~45 minutes of ela...
New
This Year's Trending
Title says all!
Is it possible to manually mark tests as incomplete or skipped in ExUnit, in the middle of a test case?
New
Hi again ppl,
I really like the idea of test my private functions, mainly after read this article of @pragdave, but the library that he...
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Testcontainers
Testcontainers is an Elixir library that supports ExUnit tests, providing lightweight, throwaway instances of common datab...
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PhoenixTest provides a unified way of writing feature tests – regardless of whether you’re testing LiveView pages or static pages.
It al...
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Efx is a library to define and test side effects declaratively. It is basically a very focused mocking framework, reducing implementation...
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I’m currently in the process of taking over a very large codebase in my new job and already did my first simple changes within a day ago ...
New
I'm using Wallaby (0.17.0) for acceptance tests with phantomjs (2.1.1), and the latest Elixir (1.4.5) and Erlang (20). I've written a few...
New
Hi everyone,
I’m curious how people in the Elixir community are approaching evaluation frameworks for AI applications, whether you’re us...
New
Claude Code Plugin for Elixir: Custom Skills and Hooks for Better Code
Quality
I’ve been experimenting with Claude Code for Elixir devel...
New
SeedFactory - a toolkit for test data generation
GitHub | docs | Hex.pm
The main idea of SeedFactory is to generate test data by calling...
New
I wanted to write down some of the main guides I use when writing Elixir tests, so I have summarised them in blogpost.
Furthermore, I th...
New
Background
I have an umbrella project, where I run mix test from the root.
In one of the apps, I am mocking the File module using the Mo...
New
Hey, Elixir Forum. I’m excited to introduce LiveCapture, a storybook-like library for Phoenix LiveView components.
I like having stories...
New
I think scala testing libraries has an operator for tests that checks some condition eventuallt evaluates to true (with an implicit timeo...
New
Thanks to Brian @bglusman who provided a very valuable PR to this library, I am to introduce the mutation-testing library for BEAM langua...
New
Last Three Year's Trending
Hi! May someone helps me, please!
I have two apps into an umbrella project: the first one is Database, which manages queries, and the se...
New
I have this code in my controller
def create(conn, %{"order" => order_params}) do
order_params = get_params(conn, order_params...
New
I have a seed.exs and I want to use it before mix test to seed db and then use that data inside tests. How do I do that?
New
Should it be safe to use Application put/get env in multiple tests ? Assuming I "clean" the env at the setup of each tests, is it possibl...
New
I’m working on a multiple-choice quiz application that uses LiveView for its interface. The questions are randomly selected from a larger...
New
:wave: Hi there,
I’ve been working on a Test-Driven Development with Phoenix book. It teaches TDD and BDD by building a chat app from th...
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I’m trying to test a Phoenix phx-click event which, after being clicked, adds a flash message to the socket of a Live view: put_flash (),...
New
Hello, all!
I’m curious if anyone has ideas/experience around the best ways to go about testing live view components. Obviously you can ...
New
Hi,
I cannot figure out how to test some LiveComponents simulating the actual events that would be sent by the user.
In my case, the Li...
New
I’m writing some tests and I want to build a “common language” for writing test tags. I’m using this post to document my findings as I le...
New
I’m still in a learning phase regarding testing in Elixir, and yesterday I was trying to understand the common patterns to mock built-in ...
New
Hi there,
I’ve recently added end-to-end testing to my phoenix application. I quickly tried setting up hound but then ended up using wal...
New
I’d like to announce Mneme, a snapshot testing tool I’ve been working on.
Docs
Hex
GitH...
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I have a LiveView page that returns a list of students names and ids sorted in a table.
In test,
{:ok, index, html} = live(conn, Routes...
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TL;DR: library to conveniently spawn throwaway docker containers for your integration/functional tests. Not stable yet. Written by an Eli...
New
Trending Over Three Years
I have an umbrella app.
Some of the apps inside depend on other apps in the umbrella, unsurprisingly.
I'm writing a test for one of t...
New
ExUnit now has describe blocks which is a welcome addition coming from RSpec. In the docs, it states that nested hierarchies of describe ...
New
Background
Let’s assume I have a typical GenServer that receives messages as requests, does some operation in a DB and returns responses....
New
Background
I have a test suite and I need to know the coverage of the project.
I have played around with mix test --cover but I find the...
New
Using Guardian for register/login.
I am getting this error when I try to log in:
[info] Sent 401 in 819ms
[error] #PID<0.440.0> r...
New
Theres a new tool for acceptance testing called Wallaby, I was wondering if anyone has experience with it. I was specifically wondering h...
New
This is a bit of a “strange” question but please bare with me; I expect it will be useful/insightful to others learning Elixir/Phoenix wa...
New
Given these two maps:
map1 = %{a: 1}
map2 = %{a:1, b: 2}
This works fine:
%{a: 1} = map2
But these do not:
iex> ^map1 = map2
*...
New
In order to update a last_seen field when a User leaves their UserChannel, I am starting a GenServer, on join, that monitors the User's U...
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Hi, I'm in need to test that some process (in my particular case, it's a Phoenix channel) receives some message from another process (via...
New
Hello there!
I have a mix task which grabs some data from a remote API, collects it into a file (a biggish xml), then sucks it in as a ...
New
Background
I have a test file with several describe blocks, each one with a custom setup block, like the following:
defmodule MyAppTest ...
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Hello
I’m opening this thread to ask some questions about testing practices when dealing with values set at compile time. I’m working w...
New
I can see Logger outputs from my test scripts, but when I add Logger statements into the tested application, these won't show during the ...
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Is it possible to write a script file that launches the Elixir console, and then compiling files and finally execute a function from a co...
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