Enum Bang setter (#82)

Add a bang method to set enum values

Author: dkam

README.md

@@ -109,8 +109,10 @@ enum = Kredis.enum "myenum", values: %w[ one two three ], default: "one"
 true == enum.one?               # => GET myenum
 enum.value = "two"              # => SET myenum "two"
 "two" == enum.value             # => GET myenum
+enum.three!                     # => SET myenum "three"
+"three" == enum.value           # => GET myenum
 enum.value = "four"
-"two" == enum.value             # => GET myenum
+"three" == enum.value           # => GET myenum
 enum.reset                      # => DEL myenum
 "one" == enum.value             # => GET myenum
 

lib/kredis/types/enum.rb

@@ -28,6 +28,7 @@ def reset
     def define_predicates_for_values
       values.each do |defined_value|
         define_singleton_method("#{defined_value}?") { value == defined_value }
+        define_singleton_method("#{defined_value}!") { self.value = defined_value }
       end
     end
 end

test/types/enum_test.rb

@@ -14,6 +14,11 @@ class EnumTest < ActiveSupport::TestCase
     assert @enum.two?
 
     assert_not @enum.three?
+
+    @enum.three!
+    assert @enum.three?
+
+    assert_not @enum.two?
   end
 
   test "validated value" do