Questions & Help>Questions

Phoenix - test whether particular template was rendered / passed to render

/phoenix#testing#templates#unit-testing
silverdr

silverdr

Is there an easy method of testing whether a particular template was rendered / passed to render. The guides I read all say about matching output strings as testing method for views/templates. I am looking for a way to test if the expected template is rendered, without taking into account or even knowing what its content is. Suggestions appreciated.

12 comments
/phoenix#testing#templates#unit-testing
3236 12

Marked As Solved

kuroda

kuroda

@silverdr

How about using Phoenix.Controller.view_template/1?

defmodule MyAppWeb.PageControllerTest do
  use MyAppWeb.ConnCase, async: true

  test "index.html.eex was rendeded", %{conn: conn} do
    conn = get(conn, "/")
    assert Phoenix.Controller.view_template(conn) == "index.html"
  end
end
3
Post #11

Also Liked

derek-zhou

derek-zhou

Then you can abstract out the internal rules/conditions into a separate module and write unit test on it, right? If you don’t care about the template content why do you want to get the rendering involved in the unit test in the first place?

3
Post #5
silverdr

silverdr OP

Seems to work well, especially when combined with Phoenix.Controller.view_module(conn), which removes potential ambiguity with template naming.

2
Post #13
hauleth

hauleth

Why testing such implementation? I always test only results, as it doesn’t matter how that result was achieved internally.

1
Post #1

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