What if things are not :ok?

[iamvery]

Problem

Currently the LiveView helpers assume in nearly all cases that the value piped along follows the form {conn, {:ok, view, html}}. This does not account for other cases such as {:error, {:redirect, ...}} and {:error, {:live_redirect, ...}}.

(Potential) Solution

Provide additional function heads to handle alternative scenarios. At this time, it's unclear to when what such scenarios may be, so we should first identify use cases and then figure out how to adapt the library to solve those problems.

[iamvery]

Here's one test I found in a real project:

test "redirects", %{conn: conn} do
  {:error, {:redirect, _}} = live(conn, Routes.dashboard_index_path(@endpoint, :index, @tenant))
end

I can imagine perhaps having a new function to model this as an assertion rather than a match:

test "redirects", %{conn: conn} do
  start(conn, Routes.dashboard_index_path(@endpoint, :index, @tenant))
  |> assert_redirection()
end

My question is: Would such a condition be terminal or might there be other scenarios where the pipeline continues?

[iamvery]

Here's another:

test "it redirects to URL", %{conn: conn} do
  to = "/streams/1"

  {:error, {:live_redirect, %{to: ^to}}} =
    conn
    |> log_in_user(:admin, @project)
    |> live("/the-chosen/streams/#{ls.id}/data")
end

Might become:

test "it redirects to URL", %{conn: conn} do
  conn
  |> log_in_user(:admin, @project)
  |> start("/the-chosen/streams/#{ls.id}/data")
  |> assert_redirection(to: "/streams/1")
end