close #1

Author: MarioRuiz

README.md

@@ -428,6 +428,17 @@ StringPattern.optimistic = true
 #>SAAERfixedtext988
 ```
 
+#### block_list
+
+To specify which words will be avoided from the results
+
+```ruby
+StringPattern.block_list = ['example', 'wrong', 'ugly']
+StringPattern.block_list_enabled = true
+"2-20:Tn".gen #>AAñ34Ef99éNOP
+```
+
+
 ## Contributing
 
 Bug reports and pull requests are welcome on GitHub at https://github.com/marioruiz/string_pattern.

lib/string/pattern/generate.rb

@@ -568,6 +568,16 @@ def StringPattern.generate(pattern, expected_errors: [], **synonyms)
           good_result = true
         end
       end
+      if @block_list_enabled
+        if @block_list.is_a?(Array)
+          @block_list.each do |bl|
+            if string.match?(/#{bl}/i)
+              good_result = false
+              break
+            end
+          end
+        end
+      end
     end until good_result or tries > 10000
     unless good_result
       puts "Not possible to generate the string on StringPattern.generate: #{pattern.inspect}, expected_errors: #{expected_errors.inspect}"

lib/string_pattern.rb

@@ -25,9 +25,13 @@
 #             In case using regular expressions the maximum when using * or + for repetitions
 # word_separator: (String, default: '_')
 #             When generating words using symbol types 'w' or 'p' the character to separate the english or spanish words.
+# block_list: (Array, default: empty)
+#             Array of words to be avoided from resultant strings.
+# block_list_enabled: (TrueFalse, default: false)
+#             If true block_list will be take in consideration
 class StringPattern
   class << self
-    attr_accessor :national_chars, :optimistic, :dont_repeat, :cache, :cache_values, :default_infinite, :word_separator
+    attr_accessor :national_chars, :optimistic, :dont_repeat, :cache, :cache_values, :default_infinite, :word_separator, :block_list, :block_list_enabled
   end
   @national_chars = (("a".."z").to_a + ("A".."Z").to_a).join
   @optimistic = true
@@ -36,6 +40,8 @@ class << self
   @dont_repeat = false
   @default_infinite = 10
   @word_separator = "_"
+  @block_list_enabled = false
+  @block_list = []
   NUMBER_SET = ("0".."9").to_a
   SPECIAL_SET = [" ", "~", "!", "@", "#", "$", "%", "^", "&", "*", "(", ")", "-", "_", "+", "=", "{", "}", "[", "]", "'", ";", ":", "?", ">", "<", "`", "|", "/", '"']
   ALPHA_SET_LOWER = ("a".."z").to_a
@@ -56,4 +62,5 @@ def self.national_chars=(par)
     @cache = Hash.new()
     @national_chars = par
   end
+
 end

spec/string/pattern/generate_spec.rb

@@ -479,6 +479,26 @@
       expect(regexp.gen.match?(regexp)).to eq true
     end
 
+    describe "block_list" do
+      before(:all) do
+        StringPattern.block_list = []
+        StringPattern.block_list_enabled = false
+      end
+
+      after(:each) do
+        StringPattern.block_list = []
+        StringPattern.block_list_enabled = false
+      end
+
+      it "doesn't return any of block list" do
+        StringPattern.block_list_enabled = true
+        StringPattern.block_list = ('a'..'x').to_a
+        5.times do 
+          expect("2:L".gen).to match(/^[yz]{2}$/i)
+        end
+      end
+    end
+
 
   end
 end