Add support to numericality: :other_than

lib/shoulda/matchers/active_model/numericality_matchers/comparison_matcher.rb

@@ -9,7 +9,8 @@ class ComparisonMatcher < ValidationMatcher
             :>= => :greater_than_or_equal_to,
             :< => :less_than,
             :<= => :less_than_or_equal_to,
-            :== => :equal_to
+            :== => :equal_to,
+            :!= => :other_than
           }
 
           def initialize(numericality_matcher, value, operator)
@@ -125,6 +126,8 @@ def assertions
               [true, false, false]
             when :<=
               [true, true, false]
+            when :!=
+              [true, false, true]
             end
           end
 
@@ -146,6 +149,7 @@ def comparison_expectation
               when :== then "equal to"
               when :< then "less than"
               when :<= then "less than or equal to"
+              when :!= then "other than"
             end
           end
         end

lib/shoulda/matchers/active_model/validate_numericality_of_matcher.rb

@@ -395,6 +395,11 @@ def is_less_than_or_equal_to(value)
           self
         end
 
+        def is_other_than(value)
+          prepare_submatcher(comparison_matcher_for(value, :!=).for(@attribute))
+          self
+        end
+
         def with_message(message)
           @expects_custom_validation_message = true
           @expected_message = message

spec/unit/shoulda/matchers/active_model/validate_numericality_of_matcher_spec.rb

@@ -39,6 +39,13 @@ def all_qualifiers
           validation_name: :equal_to,
           validation_value: 1,
         },
+        {
+          category: :comparison,
+          name: :is_other_than,
+          argument: 1,
+          validation_name: :other_than,
+          validation_value: 1,
+        },
         {
           category: :cardinality,
           name: :odd,