module Assertable

# File lib/assertable.rb, line 18
def assert(value_to_check, message = nil)
  return if value_to_check

  message ||= "Expected #{value_to_check.inspect} to be truthy."
  raise Assertion, message
end

# File lib/assertable.rb, line 25
def assert_equal(expected_value, actual_value, message = nil)
  if expected_value.nil?
    raise BadAssertionChoice, 'Use assert_nil when expecting nil'
  end
  return if expected_value == actual_value

  message ||= [
    "Expected: #{expected_value.inspect}",
    "Actual: #{actual_value.inspect}"
  ].join("\n")
  raise Assertion, message
end

# File lib/assertable.rb, line 38
def assert_includes(ok_values, value, message = nil)
  unless ok_values.is_a? Array
    raise BadAssertionChoice, 'Use assert_equal if checking equality'
  end
  return if ok_values.include? value

  message ||= [
    value,
    'is not included in',
    ok_values.map(&:to_s).join(',')
  ].join ' '
  raise Assertion, message
end

# File lib/assertable.rb, line 52
def assert_kind_of(klass, object, message = nil)
  return if object.is_a?(klass)

  message ||= "Expected #{object.inspect} to be a #{klass}. But it was not."
  raise Assertion, message
end

# File lib/assertable.rb, line 59
def assert_nil(value_to_check, message = nil)
  return if value_to_check.nil?

  message ||= "Expected #{value_to_check.inspect} to be nil."
  raise Assertion, message
end

# File lib/assertable.rb, line 11
def assert_send(method_name)
  assert(
    send(method_name),
    "Expected :#{method_name} to not be falsy, but it was."
  )
end

# File lib/assertable.rb, line 66
def refute(value_to_check, message = nil)
  return unless value_to_check

  message ||= "Expected #{value_to_check.inspect} to be falsy."
  raise Assertion, message
end

# File lib/assertable.rb, line 73
def refute_equal(expected_value, actual_value, message = nil)
  return unless expected_value == actual_value

  message ||= [
    "Expected #{actual_value.inspect} to not be equal to",
    "#{expected_value.inspect}."
  ].join(' ')
  raise Assertion, message
end