Add rspec metadata flag to blacklist an example group from mutation testing

lib/mutant/integration/rspec.rb

@@ -114,7 +114,9 @@ module Mutant
       # @api private
       #
       def all_examples
-        @world.example_groups.flat_map(&:descendants).flat_map(&:examples)
+        @world.example_groups.flat_map(&:descendants).flat_map(&:examples).select do |example|
+          example.metadata.fetch(:mutant, true)
+        end
       end
 
       # Filter examples

spec/integration/mutant/corpus_spec.rb

@@ -1,4 +1,4 @@
-RSpec.describe 'Mutant on ruby corpus' do
+RSpec.describe 'Mutant on ruby corpus', mutant: false do
 
   before do
     skip 'Corpus test is deactivated on < 2.1' if RUBY_VERSION < '2.1'

spec/integration/mutant/null_spec.rb

@@ -1,4 +1,4 @@
-RSpec.describe 'null integration' do
+RSpec.describe 'null integration', mutant: false do
 
   let(:base_cmd) { 'bundle exec mutant -I lib --require test_app "TestApp*"' }
 

spec/integration/mutant/rspec_spec.rb

@@ -1,4 +1,4 @@
-RSpec.describe 'rspec integration' do
+RSpec.describe 'rspec integration', mutant: false do
 
   let(:base_cmd) { 'bundle exec mutant -I lib --require test_app --use rspec' }
 

spec/integration/mutant/test_mutator_handles_types_spec.rb

@@ -1,4 +1,4 @@
-RSpec.describe do
+RSpec.describe 'AST type coverage', mutant: false do
 
   specify 'mutant should not crash for any node parser can generate' do
     Mutant::AST::Types::ALL.each do |type|

spec/integration/mutant/zombie_spec.rb

@@ -1,4 +1,4 @@
-RSpec.describe 'as a zombie' do
+RSpec.describe 'as a zombie', mutant: false do
   specify 'it allows to create zombie from mutant' do
     expect { Mutant.zombify }.to change { defined?(Zombie) }.from(nil).to('constant')
     expect(Zombie.constants).to include(:Mutant)