Add test only runner

Gemfile

@@ -4,4 +4,6 @@ source 'https://rubygems.org'
 
 gemspec name: 'mutant'
 
+gem 'rspec-core', path: '../rspec-core'
+
 eval_gemfile 'Gemfile.shared'

Gemfile.lock

@@ -1,3 +1,9 @@
+PATH
+  remote: ../rspec-core
+  specs:
+    rspec-core (3.12.1)
+      rspec-support (~> 3.12.0)
+
 PATH
   remote: .
   specs:
@@ -33,8 +39,6 @@ GEM
       rspec-core (~> 3.12.0)
       rspec-expectations (~> 3.12.0)
       rspec-mocks (~> 3.12.0)
-    rspec-core (3.12.2)
-      rspec-support (~> 3.12.0)
     rspec-expectations (3.12.3)
       diff-lcs (>= 1.2.0, < 2.0)
       rspec-support (~> 3.12.0)
@@ -74,7 +78,7 @@ DEPENDENCIES
   mutant-license!
   parallel (~> 1.3)
   rspec (~> 3.10)
-  rspec-core (~> 3.10)
+  rspec-core!
   rspec-its (~> 1.3.0)
   rubocop (~> 1.7)
 

docs/configuration.md

@@ -89,6 +89,7 @@ integration:
   # Below shows an example configuring rspec to use a static seed from the config file.
   arguments:
   - --fail-fast # rspec integration default, keep this when specifying manual options!
+  - --force-color # rspec integration default, keep this if colored output is not an issue for you
   - --seed # option
   - '0' # option value, needs to be a string.
   - spec # rspec integration default, tell rspec integration where to find specs

lib/mutant.rb

@@ -204,6 +204,8 @@ module Mutant
     require 'mutant/expression/namespace'
     require 'mutant/expression/parser'
     require 'mutant/test'
+    require 'mutant/test/runner'
+    require 'mutant/test/runner/sink'
     require 'mutant/timer'
     require 'mutant/integration'
     require 'mutant/integration/null'
@@ -243,6 +245,7 @@ module Mutant
     require 'mutant/reporter/cli/printer/mutation_result'
     require 'mutant/reporter/cli/printer/status_progressive'
     require 'mutant/reporter/cli/printer/subject_result'
+    require 'mutant/reporter/cli/printer/test'
     require 'mutant/reporter/cli/format'
     require 'mutant/repository'
     require 'mutant/repository/diff'

lib/mutant/bootstrap.rb

@@ -29,8 +29,6 @@ module Bootstrap
     # @param [Env] env
     #
     # @return [Either<String, Env>]
-    #
-    # rubocop:disable Metrics/MethodLength
     def self.call(env)
       env.record(:bootstrap) do
         env = load_hooks(env)
@@ -47,6 +45,31 @@ def self.call(env)
           selected_subjects.flat_map(&:mutations)
         end
 
+        setup_integration(
+          env:               env,
+          mutations:         mutations,
+          selected_subjects: selected_subjects
+        )
+      end
+    end
+
+    # Run test only bootstrap
+    #
+    # @param [Env] env
+    #
+    # @return [Either<String, Env>]
+    def self.call_test(env)
+      env.record(:bootstrap) do
+        setup_integration(
+          env:               load_hooks(env),
+          mutations:         [],
+          selected_subjects: []
+        )
+      end
+    end
+
+    def self.setup_integration(env:, mutations:, selected_subjects:)
+      env.record(__method__) do
         Integration.setup(env).fmap do |integration|
           env.with(
             integration: integration,
@@ -57,7 +80,6 @@ def self.call(env)
         end
       end
     end
-    # rubocop:enable Metrics/MethodLength
 
     def self.load_hooks(env)
       env.record(__method__) do

lib/mutant/cli/command/environment/test.rb

@@ -8,6 +8,16 @@ class Test < self
           NAME              = 'test'
           SHORT_DESCRIPTION = 'test subcommands'
 
+        private
+
+          def bootstrap
+            env = Env.empty(world, @config)
+
+            env
+              .record(:config) { Config.load(cli_config: @config, world: world) }
+              .bind { |config| Bootstrap.call_test(env.with(config: config)) }
+          end
+
           class List < self
             NAME              = 'list'
             SHORT_DESCRIPTION = 'List tests detected in the environment'
@@ -28,7 +38,19 @@ def list_tests(env)
             end
           end
 
-          SUBCOMMANDS = [List].freeze
+          class Run < self
+            NAME              = 'run'
+            SHORT_DESCRIPTION = 'Run tests'
+            SUBCOMMANDS       = EMPTY_ARRAY
+
+          private
+
+            def action
+              bootstrap.bind(&Mutant::Test::Runner.method(:call))
+            end
+          end
+
+          SUBCOMMANDS = [List, Run].freeze
         end # Test
       end # Environment
     end # Command

lib/mutant/integration.rb

@@ -4,7 +4,11 @@ module Mutant
 
   # Abstract base class mutant test framework integrations
   class Integration
-    include AbstractType, Adamantium, Anima.new(:arguments, :expression_parser, :world)
+    include AbstractType, Adamantium, Anima.new(
+      :arguments,
+      :expression_parser,
+      :world
+    )
 
     LOAD_MESSAGE = <<~'MESSAGE'
       Unable to load integration mutant-%<integration_name>s:

lib/mutant/integration/rspec.rb

@@ -24,7 +24,7 @@ class Rspec < self
       ALL_EXPRESSION       = Expression::Namespace::Recursive.new(scope_name: nil)
       EXPRESSION_CANDIDATE = /\A([^ ]+)(?: )?/.freeze
       EXIT_SUCCESS         = 0
-      DEFAULT_CLI_OPTIONS  = %w[--fail-fast spec].freeze
+      DEFAULT_CLI_OPTIONS  = %w[--fail-fast --force-color spec].freeze
       TEST_ID_FORMAT       = 'rspec:%<index>d:%<location>s/%<description>s'
 
       private_constant(*constants(false))
@@ -42,7 +42,7 @@ def initialize(*)
       #
       # @return [self]
       def setup
-        @runner.setup($stderr, $stdout)
+        @runner.setup(world.stderr, world.stdout)
         example_group_map
         reset_examples
         self
@@ -55,6 +55,7 @@ def setup
       #
       # @return [Result::Test]
       def call(tests)
+        reset_examples
         setup_examples(tests.map(&all_tests_index))
         start = timer.now
         passed = @runner.run_specs(@rspec_world.ordered_example_groups).equal?(EXIT_SUCCESS)

lib/mutant/reporter/cli.rb

@@ -28,6 +28,16 @@ def start(env)
         self
       end
 
+      # Report test start
+      #
+      # @param [Env] env
+      #
+      # @return [self]
+      def test_start(env)
+        write(format.test_start(env))
+        self
+      end
+
       # Report progress object
       #
       # @param [Parallel::Status] status
@@ -38,6 +48,14 @@ def progress(status)
         self
       end
 
+      # Report progress object
+      #
+      # @return [self]
+      def test_progress(status)
+        write(format.test_progress(status))
+        self
+      end
+
       # Report delay in seconds
       #
       # @return [Float]
@@ -65,6 +83,16 @@ def report(env)
         self
       end
 
+      # Report env
+      #
+      # @param [Result::Env] env
+      #
+      # @return [self]
+      def test_report(env)
+        Printer::Test::EnvResult.call(output: output, object: env)
+        self
+      end
+
     private
 
       def write(frame)

lib/mutant/reporter/cli/format.rb

@@ -18,11 +18,14 @@ class Format
 
         # Progress representation
         #
-        # @param [Runner::Status] status
-        #
         # @return [String]
         abstract_method :progress
 
+        # Progress representation
+        #
+        # @return [String]
+        abstract_method :test_progress
+
         # Report delay in seconds
         #
         # @return [Float]
@@ -69,13 +72,27 @@ def start(env)
             format(Printer::Env, env)
           end
 
+          # Test start representation
+          #
+          # @return [String]
+          def test_start(env)
+            format(Printer::Test::Env, env)
+          end
+
           # Progress representation
           #
           # @return [String]
           def progress(status)
             format(Printer::StatusProgressive, status)
           end
 
+          # Progress representation
+          #
+          # @return [String]
+          def test_progress(status)
+            format(Printer::Test::StatusProgressive, status)
+          end
+
         private
 
           def new_buffer