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BDD testing framework for Elixir inspired by RSpec.
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lib/espec/assertions/interface.ex
defmodule ESpec.Assertions.Interface do
@moduledoc """
Defines the assertion interface.
There are 3 function should be defined in the 'assertion' module:
- `match/2`;
- `success_message/4`;
- `error_message/4`.
"""
defmacro __using__(_opts) do
quote do
def assert(subject, data, positive \\ true) do
case match(subject, data) do
{false, result} when positive -> raise_error(subject, data, result, positive)
{true, result} when not positive -> raise_error(subject, data, result, positive)
{true, result} when positive -> success_message(subject, data, result, positive)
{false, result} when not positive -> success_message(subject, data, result, positive)
end
end
defp raise_error(subject, data, result, positive) do
raise ESpec.AssertionError, subject: subject, data: data, result: result,
asserion: __MODULE__, message: error_message(subject, data, result, positive)
end
end
end
end