Add RubyFeatures#supports_taint?

Author: JonRowe

lib/rspec/support/ruby_features.rb

@@ -90,6 +90,15 @@ def supports_exception_cause?
         end
       end
 
+      if RUBY_VERSION.to_f >= 2.7
+        def supports_taint?
+          false
+        end
+      else
+        def supports_taint?
+          true
+        end
+      end
       ripper_requirements = [ComparableVersion.new(RUBY_VERSION) >= '1.9.2']
 
       ripper_requirements.push(false) if Ruby.rbx?

spec/rspec/support/ruby_features_spec.rb

@@ -95,6 +95,10 @@ module Support
         RubyFeatures.supports_rebinding_module_methods?
       end
 
+      specify "#supports_taint?" do
+        RubyFeatures.supports_taint?
+      end
+
       specify "#caller_locations_supported? exists" do
         RubyFeatures.caller_locations_supported?
         if Ruby.mri?