yak(behavior-tests-editorial-liveviews-microprints-editor-dashboard-llh3): behavior tests: editorial LiveViews (microprints, editor dashboard)

app/test/support/microprints_case.ex

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+defmodule FirehoseWeb.MicroprintsCase do
+  @moduledoc """
+  Helpers for driving the `/microprints` LiveView.
+
+  Both `FirehoseWeb.MicroprintsLiveTest` and `FirehoseWeb.SourceViewerTest` walk
+  the same page through the same two controls (the per-card Expand/Collapse
+  button and the microprint rects), so the mechanics live here instead of being
+  re-implemented in each test module.
+
+  A plain module, imported by the tests, rather than a `use`-able case template:
+  the LiveView tests own their own setup and only share these three actions.
+  """
+
+  import Phoenix.LiveViewTest
+
+  @doc """
+  Clicks the Expand control of the card for `path` and returns the render.
+  """
+  def expand_file(view, path) do
+    view
+    |> element(~s(button[phx-value-path="#{path}"]), "Expand")
+    |> render_click()
+  end
+
+  @doc """
+  Clicks the Collapse control of the card for `path` and returns the render.
+  """
+  def collapse_file(view, path) do
+    view
+    |> element(~s(button[phx-value-path="#{path}"]), "Collapse")
+    |> render_click()
+  end
+
+  @doc """
+  Clicks a single line of a microprint, highlighting it in the source viewer.
+
+  The microprint renders several rect segments per line, so `element/3` cannot
+  pick one; the `highlight_line` event is dispatched directly instead.
+  """
+  def click_microprint_rect(view, path, line) do
+    render_click(view, "highlight_line", %{"line" => Integer.to_string(line), "path" => path})
+  end
+end