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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 system.ex
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lib/system.ex 

defmodule Excessibility.System do

  @moduledoc """

  Default implementation for system commands.



  Opens files in the system's default browser. This is used during interactive

  diff resolution to show `.good.html` and `.bad.html` files side by side.



  ## Mocking for CI



  In CI environments, you typically want to mock this module to avoid

  opening browsers:



      # test/test_helper.exs

      Mox.defmock(Excessibility.SystemMock, for: Excessibility.SystemBehaviour)

      Application.put_env(:excessibility, :system_mod, Excessibility.SystemMock)



      # In tests

      stub(Excessibility.SystemMock, :open_with_system_cmd, fn _path -> :ok end)

  """

  @behaviour Excessibility.SystemBehaviour



  @doc """

  Opens a file in the system's default browser.



  Uses platform-appropriate commands:

  - macOS: `open`

  - Linux: `xdg-open`

  - Windows: `start`

  """

  @impl true

  def open_with_system_cmd(path) do

    cmd =

      case :os.type() do

        {:unix, :darwin} -> "open"

        {:unix, _} -> "xdg-open"

        {:win32, _} -> "start"

      end



    System.cmd(cmd, [path])

  end

end