Files
elixir-koans/lib/display/failure.ex
2016-12-23 08:29:04 -06:00

52 lines
1.4 KiB
Elixir

defmodule Display.Failure do
alias Display.Paint
@no_value :ex_unit_no_meaningful_value
def format_failure(%{error: %ExUnit.AssertionError{expr: @no_value, message: message}, file: file, line: line}) do
"""
#{Paint.cyan("Assertion failed in #{file}:#{line}")}
#{Paint.red(message)}
"""
end
def format_failure(%{error: %ExUnit.AssertionError{expr: expr} = error, file: file, line: line}) do
"""
#{Paint.cyan("Assertion failed in #{file}:#{line}")}
#{Paint.red(Macro.to_string(expr))}
"""
|> format_inequality(error)
end
def format_failure(%{error: error, file: file, line: line}) do
"""
#{Paint.cyan("Error in #{file}:#{line}")}
#{format_error(error)}
"""
end
defp format_inequality(message, %{left: @no_value, right: @no_value}) do
message
end
defp format_inequality(message, %{left: @no_value, right: match_value}) do
"""
#{message}
value does not match: #{match_value |> inspect |> Paint.yellow}
"""
end
defp format_inequality(message, %{left: left, right: right}) do
"""
#{message}
left: #{left |> inspect |> Paint.yellow}
right: #{right |> inspect |> Paint.yellow}
"""
end
defp format_error(error) do
trace = System.stacktrace |> Enum.take(2)
Paint.red(Exception.format(:error, error, trace))
end
def show_compile_error(error) do
format_error(error)
end
end