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BDD testing framework for Elixir inspired by RSpec.
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lib/espec/assertions/be.ex
defmodule ESpec.Assertions.Be do
@moduledoc """
Defines 'be' assertion.
it do: expect(2).to be :>, 1
"""
use ESpec.Assertions.Interface
alias ESpec.DatesTimes.Comparator
defp match(subject, [op, val, [{granularity, delta}]]) do
actual_delta =
subject
|> Comparator.diff(val, granularity)
|> abs()
result = apply(Kernel, op, [subject, val]) && apply(Kernel, op, [actual_delta, delta])
{result, {granularity, actual_delta}}
end
defp match(subject, [op, val, {granularity, delta}]) do
actual_delta =
subject
|> Comparator.diff(val, granularity)
|> abs()
result = apply(Kernel, op, [subject, val]) && apply(Kernel, op, [actual_delta, delta])
{result, {granularity, actual_delta}}
end
defp match(%Date{} = subject, [op, %Date{} = val]), do: match_date_times(subject, [op, val])
defp match(%Time{} = subject, [op, %Time{} = val]), do: match_date_times(subject, [op, val])
defp match(%DateTime{} = subject, [op, %DateTime{} = val]),
do: match_date_times(subject, [op, val])
defp match(%NaiveDateTime{} = subject, [op, %NaiveDateTime{} = val]),
do: match_date_times(subject, [op, val])
defp match(subject, [op, val]) do
result = apply(Kernel, op, [subject, val])
{result, result}
end
defp match_date_times(subject, [op, val]) do
delta = subject |> Comparator.diff(val, :microsecond)
result = apply(Kernel, op, [delta, 0])
{result, result}
end
defp success_message(subject, [op, val, [{granularity, delta}]], _result, positive) do
to = if positive, do: "is true", else: "is false"
"`#{inspect(subject)} #{op} #{inspect(val)}` #{to} with delta `[#{granularity}: #{delta}]`."
end
defp success_message(subject, [op, val, {granularity, delta}], _result, positive) do
to = if positive, do: "is true", else: "is false"
"`#{inspect(subject)} #{op} #{inspect(val)}` #{to} with delta `{:#{granularity}, #{delta}}`."
end
defp success_message(subject, [op, val], _result, positive) do
to = if positive, do: "is true", else: "is false"
"`#{inspect(subject)} #{op} #{inspect(val)}` #{to}."
end
defp error_message(
subject,
[op, val, [{granularity, delta}]],
{actual_granularity, actual_delta},
positive
) do
"Expected `#{inspect(subject)} #{op} #{inspect(val)}` to be `#{positive}` but got `#{!positive}` with delta `[#{granularity}: #{delta}]`. The actual delta is [#{actual_granularity}: #{actual_delta}], with an inclusive boundary."
end
defp error_message(
subject,
[op, val, {granularity, delta}],
{actual_granularity, actual_delta},
positive
) do
"Expected `#{inspect(subject)} #{op} #{inspect(val)}` to be `#{positive}` but got `#{!positive}` with delta `{:#{granularity}, #{delta}}`. The actual delta is {:#{actual_granularity}, #{actual_delta}}, with an inclusive boundary."
end
defp error_message(subject, [op, val], _result, positive) do
"Expected `#{inspect(subject)} #{op} #{inspect(val)}` to be `#{positive}` but got `#{!positive}`."
end
end