Skip on older Rubies

spec/rspec/matchers/dsl_spec.rb

@@ -354,9 +354,17 @@ def new_matcher(name, *expected, &block)
             (to_match <= five) || greater_than_ceiling(to_match) && not_divisible_by_divisor?(to_match)
           end
 
-          chain :and_smaller_than do |ceiling, inclusive: false|
-            @ceiling = ceiling
-            @ceiling_inclusive = inclusive
+          if RSpec::Support::RubyFeatures.kw_args_supported?
+            binding.eval(<<-CODE, __FILE__, __LINE__)
+              chain :and_smaller_than do |ceiling, inclusive: false|
+                @ceiling = ceiling
+                @ceiling_inclusive = inclusive
+              end
+            CODE
+          else
+            chain :and_smaller_than do |ceiling|
+              @ceiling = ceiling
+            end
           end
 
           chain :and_divisible_by do |divisor|
@@ -365,10 +373,16 @@ def new_matcher(name, *expected, &block)
 
         private
 
-          def smaller_than_ceiling?(to_match)
-            if @ceiling_inclusive
-              to_match <= @ceiling
-            else
+          if RSpec::Support::RubyFeatures.kw_args_supported?
+            def smaller_than_ceiling?(to_match)
+              if @ceiling_inclusive
+                to_match <= @ceiling
+              else
+                to_match < @ceiling
+              end
+            end
+          else
+            def smaller_than_ceiling?(to_match)
               to_match < @ceiling
             end
           end
@@ -427,7 +441,7 @@ def not_divisible_by_divisor?(to_match)
               fail_with 'expected 21 not to be bigger than 5 and smaller than 29 and divisible by 3'
           end
 
-          it "allows passing keyword args to chain block" do
+          it "allows passing keyword args to chain block", skip: !RSpec::Support::RubyFeatures.kw_args_supported? do
             match = matcher.and_smaller_than(10, inclusive: true).and_divisible_by(1)
             expect(10).to match
           end