Testing

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Fude.Test reads what a chart shows in Phoenix.LiveViewTest, from what the server sent the browser: no browser needed.

import Fude.Test

test "shows the revenue of each region", %{conn: conn} do
  {:ok, view, _html} = live(conn, ~p"/sales")

  assert kind(view, "revenue") == "bar"
  assert series(view, "revenue") == ["Online", "Retail"]
  assert [%{"Region" => "North", "Revenue" => 120, "Channel" => "Online"} | _] = data(view, "revenue")
end

Reading

  • chart(view, id) - all that the server sent: kind, scales, layers.
  • kind(view, id), title(view, id), description(view, id).
  • series(view, id) - the names of the series (the colors), in order.
  • data(view, id) - a map for each mark, by the titles of the columns, as the chart's table has them: categories by their names, times as Date or DateTime.
  • value(view, id) - the number of a number, trend, gauge or progress.
  • error(view, id) - why the chart does not draw, or nil.

Streaming

Fude.Live.append/5 pushes an event; assert it with assert_push_event(view, "fude:append", %{id: "load"}).