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  1. # coding: utf-8
  2. require 'minitest/autorun'
  3.  
  4. F=
  5.  
  6. ->s{r=[1.0]
  7. s.lines.map{|l|
  8. n=[i=0.0]*(r.size+1)
  9. l.scan(/\S/).map{|e|a,b=e>?/?e>?]?[0.5]*2:[0,1]:[1,0]
  10. z=r[i]
  11. n[i]+=z*a
  12. n[i+=1]+=z*b}
  13. r=n}
  14. r}
  15.  
  16. describe '#F' do
  17.   def test_0_levels
  18.     assert_equal [1.0], F['']
  19.   end
  20.  
  21.   def test_1_level
  22.     assert_equal [0.5, 0.5], F['^']
  23.     assert_equal [1.0, 0.0], F['/']
  24.     assert_equal [0.0, 1.0], F['\\']
  25.   end
  26.  
  27.   def test_2_levels
  28.     assert_equal [0.5, 0.5, 0.0], F['
  29.  /
  30. ^ ^
  31.       '.strip]
  32.   end
  33.  
  34.   def test_3_levels
  35.     assert_equal [0.125, 0.375, 0.375, 0.125], F['
  36.   ^
  37.  ^ ^
  38. ^ ^ ^
  39.       '.strip]
  40.  
  41.     assert_equal [0.0, 0.0, 0.0, 1.0], F['
  42.   \
  43.  / \
  44. / / \
  45.       '.strip]
  46.   end
  47.  
  48.   def test_4_levels
  49.     assert_equal [0.0, 0.1875, 0.5625, 0.125, 0.125], F['
  50.    ^
  51.   \ ^
  52.  ^ ^ \
  53. \ ^ / ^
  54.       '.strip]
  55.   end
  56.  
  57.   def test_7_levels
  58.     assert_equal [0.0, 0.09375, 0.28125, 0.4375, 0.1875, 0.0, 0.0, 0.0], F['
  59.       ^
  60.      / ^
  61.     ^ ^ /
  62.    / \ / \
  63.   ^ ^ / ^ \
  64.  ^ \ ^ \ / ^
  65. \ ^ ^ ^ \ ^ /
  66.       '.strip]
  67.   end
  68.  
  69. end
Success #stdin #stdout 0.05s 8528KB
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Standard input is empty
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Run options: --seed 52762

# Running tests:

......

Finished tests in 0.001213s, 4945.6270 tests/s, 7418.4404 assertions/s.

6 tests, 9 assertions, 0 failures, 0 errors, 0 skips
https://ideone.com/kmsZMe
language:
Ruby (ruby 2.5.5)
created:
8 years ago
visibility:
public

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