Module: Getto::InitializeWith

Defined in:
lib/getto/initialize_with.rb,
lib/getto/initialize_with/version.rb

Constant Summary collapse

VERSION = 
"1.0.5"

Class Method Summary collapse

Class Method Details

.included(m) ⇒ Object 



3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
 
# File 'lib/getto/initialize_with.rb', line 3

def self.included(m)
  m.singleton_class.class_eval do
    define_method :initialize_with do |*names,**specs|
      define_method :initialize do |**hash|
        names.each do |name|
          raise ArgumentError, "argument missing: #{name}" unless hash.has_key?(name)
          instance_variable_set :"@#{name}", hash.delete(name)
        end

        specs.each do |name,spec|
          raise ArgumentError, "argument missing: #{name}" unless hash.has_key?(name)

          entry = hash.delete(name)

          case
          when spec.is_a?(Class)
            unless entry.is_a?(spec)
              raise ArgumentError, "argument type error: #{name} is not a #{spec}"
            end
          when spec.respond_to?(:each)
            spec.each do |method|
              unless entry.respond_to?(method)
                raise ArgumentError, "argument type error: #{name} is not respond_to #{method}"
              end
            end
          else
            # :nocov:
            raise ArgumentError, "invalid spec: #{spec}"
            # :nocov:
          end

          instance_variable_set :"@#{name}", entry
        end

        raise ArgumentError, "unknown argument: #{hash.keys.join(",")}" unless hash.empty?

        self
      end

      attr_reader(*(names + specs.keys))
    end
  end
end