dwyl/learn-elixir

Testing Phoenix Controller rendering

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#186 opened on Oct 26, 2022

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Description

Hi there!

I have a basic controller "welcome" that does: render(conn, "index.html", profile: profile) There are some assigns to render

I want to write a test that demonstrates that the rendering is correct

if I do:

conn = get(conn, "/welcome")
assert html_response(conn, 200) =~"hi"

Since some template assigns are present in the template, my test says that a key is not present.

Using Plug.Conn.assign(conn, :profile, %{k: v}) is ineffective.

Does anyone know how to do this? The doc is void on this or didn't find where.

Contributor guide

Tech stack
elixir
Domain
backendtesting
Issue type
documentation
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
2
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
1-3 hours
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
stale
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
clear
Prerequisites
Elixir basicsPhoenix frameworkExUnit testing
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
65
Research direction
Investigate the Phoenix.ConnTest documentation to understand how assigns are passed in tests. Look at the controller's index action to see which assigns are required. Adjust the test setup to properly assign the :profile key, possibly by using conn = get(conn, "/welcome", profile: %{...}) or using assign before the request. If the issue persists, examine the template to ensure assigns are correctly referenced.