Promote did_you_mean to default gem

At the moment, there are some problems with regard to bundler + did_you_mean because of did_you_mean being a bundled gem. Since the vendored version of thor inside bundler and ruby itself explicitly requires did_you_mean, it can become difficult to load it when using Bundler.setup. See this issue: https://github.com/yuki24/did_you_mean/issues/117#issuecomment-482733159 for more details.

1 files changed, 89 insertions, 0 deletions

diff --git a/test/did_you_mean/tree_spell/human_typo.rb b/test/did_you_mean/tree_spell/human_typo.rb
new file mode 100644
index 0000000000..302d4d6902
--- /dev/null
+++ b/test/did_you_mean/tree_spell/human_typo.rb
@@ -0,0 +1,89 @@
+# module for classes needed to test TreeSpellChecker
+module TreeSpell
+  require_relative 'change_word'
+  # Simulate an error prone human typist
+  # see doc/human_typo_api.md for the api description
+  class HumanTypo
+    def initialize(input, lambda: 0.05)
+      @input = input
+      check_input
+      @len = input.length
+      @lambda = lambda
+    end
+
+    def call
+      @word = input.dup
+      i_place = initialize_i_place
+      loop do
+        action = action_type
+        @word = make_change action, i_place
+        @len = word.length
+        i_place += exponential
+        break if i_place >= len
+      end
+      word
+    end
+
+    private
+
+    attr_accessor :input, :word, :len, :lambda
+
+    def initialize_i_place
+      i_place = nil
+      loop do
+        i_place = exponential
+        break if i_place < len
+      end
+      i_place
+    end
+
+    def exponential
+      (rand / (lambda / 2)).to_i
+    end
+
+    def rand_char
+      popular_chars =  alphabetic_characters + special_characters
+      n = popular_chars.length
+      popular_chars[rand(n)]
+    end
+
+    def alphabetic_characters
+      ('a'..'z').to_a.join + ('A'..'Z').to_a.join
+    end
+
+    def special_characters
+      '?<>,.!`+=-_":;@#$%^&*()'
+    end
+
+    def toss
+      return +1 if rand >= 0.5
+      -1
+    end
+
+    def action_type
+      [:insert, :transpose, :delete, :substitute][rand(4)]
+    end
+
+    def make_change(action, i_place)
+      cw = ChangeWord.new(word)
+      case action
+      when :delete
+        cw.deletion(i_place)
+      when :insert
+        cw.insertion(i_place, rand_char)
+      when :substitute
+        cw.substitution(i_place, rand_char)
+      when :transpose
+        cw.transposition(i_place, toss)
+      end
+    end
+
+    def check_input
+      fail check_input_message if input.nil? || input.length < 5
+    end
+
+    def check_input_message
+      "input length must be greater than 5 characters: #{input}"
+    end
+  end
+end