add binary number faker (#2166)

faker-ruby · Mar 11, 2021 · 9f52ee9 · 9f52ee9
1 parent 9ebe104
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diff --git a/doc/default/number.md b/doc/default/number.md
@@ -27,6 +27,9 @@ Faker::Number.normal(mean: 50, standard_deviation: 3.5) #=> 47.14669604069156
 # Keyword arguments: digits
 Faker::Number.hexadecimal(digits: 3) #=> "e74"
 
+# Keyword arguments: digits
+Faker::Number.binary(digits: 4) #=> "1010"
+
 # Boundary numbers are inclusive
 # Keyword arguments: from, to
 Faker::Number.between(from: 1, to: 10) #=> 7

diff --git a/lib/faker/default/number.rb b/lib/faker/default/number.rb
@@ -139,6 +139,21 @@ def hexadecimal(legacy_digits = NOT_GIVEN, digits: 6)
         hex
       end
 
+      # Produces a number in binary format.
+      #
+      # @param digits [Integer] Number of digits to generate the binary as string
+      # @return [String]
+      #
+      # @example
+      #   Faker::Number.binary(digits: 4) #=> "1001"
+      #
+      # @faker.version next
+      def binary(digits: 4)
+        bin = ''
+        digits.times { bin += rand(2).to_s(2) }
+        bin
+      end
+
       ##
       # Produces a float given a mean and standard deviation.
       #

diff --git a/test/faker/default/test_faker_number.rb b/test/faker/default/test_faker_number.rb
@@ -128,4 +128,10 @@ def test_hexadecimal
     assert @tester.hexadecimal(digits: 4).match(/[0-9a-f]{4}/)
     assert @tester.hexadecimal(digits: 7).match(/[0-9a-f]{7}/)
   end
+
+  def test_binary
+    assert @tester.binary(digits: 4).match(/^[0-1]{4}$/)
+    assert @tester.binary(digits: 8).match(/^[0-1]{8}$/)
+    assert @tester.binary.match(/^[0-1]{4}$/)
+  end
 end