Files
elixir-koans/lib/display.ex

100 lines
2.5 KiB
Elixir

defmodule Display do
alias IO.ANSI
@no_value :ex_unit_no_meaningful_value
@progress_bar_length 30
def invalid_koan(koan, modules) do
koans_names = module_names(modules)
IO.puts("Did not find koan #{name(koan)} in " <> koans_names )
end
defp module_names(modules) do
modules
|> Enum.map(&Atom.to_string/1)
|> Enum.map(&name/1)
|> Enum.join(", ")
|> Colours.red
end
defp name("Elixir." <> module), do: module
defp name(module), do: name(Atom.to_string(module))
def show_failure(failure, module, name) do
IO.puts(format(failure, module, name))
end
def format(failure, module, name) do
"""
Now meditate upon #{format_module(module)}
#{progress_bar(Tracker.summarize)}
----------------------------------------
#{name}
#{format_failure(failure)}
"""
end
def progress_bar(%{current: current, total: total}) do
arrow = caluculate_progress(current, total) |> build_arrow
"|" <> String.ljust(arrow, @progress_bar_length) <> "| #{current} of #{total}"
end
defp caluculate_progress(current, total) do
round( (current/total) * @progress_bar_length)
end
defp build_arrow(0), do: ""
defp build_arrow(length) do
String.duplicate("=", length-1) <> ">"
end
def show_compile_error(error) do
IO.puts("")
format_error(error) |> IO.puts
end
def congratulate do
IO.puts(Colours.green("\nYou have learned much. You must find your own path now."))
end
def clear_screen do
if Options.clear_screen? do
IO.puts(ANSI.clear)
IO.puts(ANSI.home)
end
end
defp format_failure(%{error: %ExUnit.AssertionError{expr: @no_value, message: message}, file: file, line: line}) do
"""
#{Colours.cyan("Assertion failed in #{file}:#{line}")}
#{Colours.red(message)}
"""
end
defp format_failure(%{error: %ExUnit.AssertionError{expr: expr}, file: file, line: line}) do
format_assertion_error(expr, file, line)
end
defp format_failure(%{error: error, file: file, line: line}) do
"""
#{Colours.cyan("Error in #{file}:#{line}")}
#{format_error(error)}
"""
end
defp format_assertion_error(error, file, line) do
"""
#{Colours.cyan("Assertion failed in #{file}:#{line}")}
#{Colours.red(Macro.to_string(error))}
"""
end
defp format_error(error) do
trace = System.stacktrace |> Enum.take(2)
Colours.red(Exception.format(:error, error, trace))
end
defp format_module(module) do
Module.split(module) |> List.last
end
end