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excessibility

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Library for accessibility snapshot testing in Phoenix applications using axe-core and Playwright.

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excessibility lib telemetry_capture enrichers duration.ex
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lib/telemetry_capture/enrichers/duration.ex 

defmodule Excessibility.TelemetryCapture.Enrichers.Duration do

  @moduledoc """

  Enriches timeline events with duration information.



  Extracts:

  - Event duration from telemetry measurements



  ## Usage



  Runs automatically during timeline building. Adds event_duration_ms

  to each timeline event.



  ## Example Output



      %{

        sequence: 3,

        event: "handle_event:filter",

        event_duration_ms: 45

      }

  """



  @behaviour Excessibility.TelemetryCapture.Enricher



  def name, do: :duration



  def enrich(_assigns, opts) do

    measurements = Keyword.get(opts, :measurements, %{})

    duration_ms = extract_duration_ms(measurements)



    %{

      event_duration_ms: duration_ms

    }

  end



  defp extract_duration_ms(nil), do: nil



  defp extract_duration_ms(%{duration: duration}) when is_integer(duration) do

    # Phoenix telemetry uses native time units

    # Convert to milliseconds and round

    System.convert_time_unit(duration, :native, :millisecond)

  end



  defp extract_duration_ms(_), do: nil

end