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BDD testing framework for Elixir inspired by RSpec.
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lib/espec/assertions/enum_string/have_count.ex
defmodule ESpec.Assertions.EnumString.HaveCount do
@moduledoc """
Defines 'have_count' assertion.
it do: expect(enum).to have_count(value)
it do: expect(string).to have_count(value)
"""
use ESpec.Assertions.Interface
defp match(enum, val) when is_binary(enum) do
result = String.length(enum)
{result == val, result}
end
defp match(enum, val) do
result = Enum.count(enum)
{result == val, result}
end
defp success_message(enum, val, _result, positive) do
to = if positive, do: "has", else: "doesn't have"
"`#{inspect enum}` #{to} `#{val}` elements."
end
defp error_message(enum, val, result, positive) do
to = if positive, do: "to", else: "not to"
"Expected `#{inspect enum}` #{to} have `#{val}` elements but it has `#{result}`."
end
end