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  1. class ApiEndpoint
  2.   attr_reader :fields
  3.  
  4.   module FieldDispatcher
  5.     def method_missing(method, *args)
  6.       setter = method.to_s.end_with?('=')
  7.  
  8.       if setter
  9.         field = method[0..-2]
  10.       else
  11.         field = method
  12.       end
  13.  
  14.       expanded_path = "#{@root}#{field}"
  15.  
  16.       if fields.has_key? expanded_path
  17.         if setter
  18.           fields[expanded_path] = args.first
  19.         else
  20.           fields[expanded_path]
  21.         end
  22.       elsif fields.keys.any? { |key| key.start_with? "#{expanded_path}." }
  23.         ApiIntermediate.new(endpoint, "#{expanded_path}.")
  24.       else
  25.         super
  26.       end
  27.     end
  28.   end
  29.  
  30.   class ApiIntermediate
  31.     attr_reader :endpoint
  32.  
  33.     def initialize(endpoint, root)
  34.       @endpoint, @root = endpoint, root
  35.     end
  36.  
  37.     def fields
  38.       @endpoint.fields
  39.     end
  40.  
  41.     include FieldDispatcher
  42.   end
  43.  
  44.   def initialize(fields={})
  45.     @fields = fields
  46.     @root   = ""
  47.   end
  48.  
  49.   include FieldDispatcher
  50.  
  51.   protected
  52.  
  53.   def endpoint
  54.     self
  55.   end
  56. end
  57.  
  58. require 'minitest/autorun'
  59.  
  60. class TestApiEndpoint < MiniTest::Unit::TestCase
  61.   def setup
  62.     @api = ApiEndpoint.new({
  63.       'foo'     => 'bar',
  64.       'jp.hoge' => 'fuga',
  65.       'jp.piyo' => 'piyo',
  66.       'jp.legacy.ruby' => '1.6.5'
  67.     })
  68.   end
  69.  
  70.   def test_plain
  71.     assert_equal 'bar', @api.foo
  72.     assert_raises NoMethodError do
  73.       @api.foobar
  74.     end
  75.   end
  76.  
  77.   def test_nested
  78.     assert_equal 'fuga', @api.jp.hoge
  79.     assert_equal 'piyo', @api.jp.piyo
  80.     assert_raises NoMethodError do
  81.       @api.jp.foobar
  82.     end
  83.   end
  84.  
  85.   def test_deeply_nested
  86.     assert_equal '1.6.5', @api.jp.legacy.ruby
  87.     assert_raises NoMethodError do
  88.       @api.jp.legacy.foobar
  89.     end
  90.   end
  91.  
  92.   def test_set
  93.     assert_raises NoMethodError do
  94.       @api.quick = true
  95.     end
  96.  
  97.     @api.foo = "baz"
  98.     assert_equal "baz", @api.fields['foo']
  99.  
  100.     @api.jp.hoge = 'not actually'
  101.     assert_equal 'not actually', @api.fields['jp.hoge']
  102.   end
  103. end
Success #stdin #stdout 0.02s 5504KB
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Standard input is empty
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Loaded suite prog
Started
....
Finished in 0.001065 seconds.

4 tests, 10 assertions, 0 failures, 0 errors, 0 skips

Test run options: --seed 47898
https://ideone.com/5wzZSS
language:
Ruby (ruby 2.5.5)
created:
11 years ago
visibility:
public

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