Method: Enumerator#results!

Defined in:
lib/mini_sanity/results.rb

#results!(&block) ⇒ Enumerable

Iterates the Enumerator with a given block, and checks that the result is an Enumerable that has one or more elements. Raises an exception if this check fails. Otherwise, returns the Enumerable result.

Examples:

[1, 2, 3].select.results!(&:odd?)  # == [1, 3]
[2, 4, 6].select.results!(&:odd?)  # raises exception

Returns:

  • (Enumerable)

Raises:

  • (ArgumentError) —

    if no block is provided

  • (MiniSanity::Error) —

    if iterating does not result in an Enumerable, or if the resulting Enumerable has no elements



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# File 'lib/mini_sanity/results.rb', line 21

def results!(&block)
  raise ArgumentError, "Enumerator#results! requires a block" unless block

  results = self.each(&block)

  if !results.is_a?(Enumerable)
    raise MiniSanity::Error.new("Result from Enumerator with block is not an Enumerable", {
      "Enumerator" => self.inspect,
      "Block" => MiniSanity::Error.describe_block(&block),
      "Result" => results.inspect,
    })
  elsif !results.any?{ true }
    raise MiniSanity::Error.new("No results from Enumerator with block", {
      "Enumerator" => self.inspect,
      "Block" => MiniSanity::Error.describe_block(&block),
    })
  end

  results
end