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interface.ex
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interface.ex
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defmodule ESpec.Assertions.Interface do
@moduledoc """
Defines the assertion interface.
There are 3 functions that 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
def assert(subject, data, positive, stacktrace) do
case match(subject, data) do
{false, result} when positive ->
raise_error(subject, data, result, positive, stacktrace)
{true, result} when not positive ->
raise_error(subject, data, result, positive, stacktrace)
{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, stacktrace \\ nil) do
e = error_message(subject, data, result, positive)
{message, extra} =
case e do
{_, _} -> e
_ -> {e, nil}
end
raise ESpec.AssertionError,
subject: subject,
data: data,
result: result,
assertion: __MODULE__,
message: message,
extra: extra,
stacktrace: stacktrace
end
end
end
end