Refactor and move things around to improve in YAGNI perspective

lib/system_check/base_executor.rb

-module SystemCheck
-  # @attr_reader [Array<BaseCheck>] checks classes of corresponding checks to be executed in the same order
-  # @attr_reader [String] component name of the component relative to the checks being executed
-  class BaseExecutor
-    attr_reader :checks
-    attr_reader :component
-
-    # @param [String] component name of the component relative to the checks being executed
-    def initialize(component)
-      raise ArgumentError unless component.is_a? String
-
-      @component = component
-      @checks = Set.new
-    end
-
-    # Add a check to be executed
-    #
-    # @param [BaseCheck] check class
-    def <<(check)
-      raise ArgumentError unless check < BaseCheck
-      @checks << check
-    end
-  end
-end

lib/system_check/simple_executor.rb

@@ -4,7 +4,29 @@ module SystemCheck
   #
   # There is no concurrency level and the output is progressively
   # printed into the STDOUT
-  class SimpleExecutor < BaseExecutor
+  #
+  # @attr_reader [Array<BaseCheck>] checks classes of corresponding checks to be executed in the same order
+  # @attr_reader [String] component name of the component relative to the checks being executed
+  class SimpleExecutor
+    attr_reader :checks
+    attr_reader :component
+
+    # @param [String] component name of the component relative to the checks being executed
+    def initialize(component)
+      raise ArgumentError unless component.is_a? String
+
+      @component = component
+      @checks = Set.new
+    end
+
+    # Add a check to be executed
+    #
+    # @param [BaseCheck] check class
+    def <<(check)
+      raise ArgumentError unless check < BaseCheck
+      @checks << check
+    end
+
     # Executes defined checks in the specified order and outputs confirmation or error information
     def execute
       start_checking(component)

spec/lib/system_check/base_executor_spec.rb

-require 'spec_helper'
-
-describe SystemCheck::BaseExecutor, lib: true do
-  class SimpleCheck < SystemCheck::BaseCheck
-    def check?
-      true
-    end
-  end
-
-  class OtherCheck < SystemCheck::BaseCheck
-    def check?
-      false
-    end
-  end
-
-  subject { described_class.new('Test') }
-
-  describe '#component' do
-    it 'returns stored component name' do
-      expect(subject.component).to eq('Test')
-    end
-  end
-
-  describe '#checks' do
-    before do
-      subject << SimpleCheck
-    end
-
-    it 'returns a set of classes' do
-      expect(subject.checks).to include(SimpleCheck)
-    end
-  end
-
-  describe '#<<' do
-    before do
-      subject << SimpleCheck
-    end
-
-    it 'appends a new check to the Set' do
-      subject << OtherCheck
-      stored_checks = subject.checks.to_a
-
-      expect(stored_checks.first).to eq(SimpleCheck)
-      expect(stored_checks.last).to eq(OtherCheck)
-    end
-
-    it 'inserts unique itens only' do
-      subject << SimpleCheck
-
-      expect(subject.checks.size).to eq(1)
-    end
-  end
-end

spec/lib/system_check/simple_executor_spec.rb

@@ -75,6 +75,42 @@ describe SystemCheck::SimpleExecutor, lib: true do
     end
   end
 
+  describe '#component' do
+    it 'returns stored component name' do
+      expect(subject.component).to eq('Test')
+    end
+  end
+
+  describe '#checks' do
+    before do
+      subject << SimpleCheck
+    end
+
+    it 'returns a set of classes' do
+      expect(subject.checks).to include(SimpleCheck)
+    end
+  end
+
+  describe '#<<' do
+    before do
+      subject << SimpleCheck
+    end
+
+    it 'appends a new check to the Set' do
+      subject << OtherCheck
+      stored_checks = subject.checks.to_a
+
+      expect(stored_checks.first).to eq(SimpleCheck)
+      expect(stored_checks.last).to eq(OtherCheck)
+    end
+
+    it 'inserts unique itens only' do
+      subject << SimpleCheck
+
+      expect(subject.checks.size).to eq(1)
+    end
+  end
+
   subject { described_class.new('Test') }
 
   describe '#execute' do
@@ -120,6 +156,7 @@ describe SystemCheck::SimpleExecutor, lib: true do
       context 'when check implements #repair!' do
         it 'executes #repair!' do
           expect_any_instance_of(RepairCheck).to receive(:repair!)
+
           subject.run_check(RepairCheck)
         end
 
@@ -127,6 +164,7 @@ describe SystemCheck::SimpleExecutor, lib: true do
           it 'does not execute #show_error' do
             expect_any_instance_of(RepairCheck).to receive(:repair!).and_call_original
             expect_any_instance_of(RepairCheck).not_to receive(:show_error)
+
             subject.run_check(RepairCheck)
           end
         end
@@ -135,6 +173,7 @@ describe SystemCheck::SimpleExecutor, lib: true do
           it 'does not execute #show_error' do
             expect_any_instance_of(RepairCheck).to receive(:repair!) { false }
             expect_any_instance_of(RepairCheck).to receive(:show_error)
+
             subject.run_check(RepairCheck)
           end
         end
@@ -144,6 +183,7 @@ describe SystemCheck::SimpleExecutor, lib: true do
     context 'when check implements skip?' do
       it 'executes #skip? method' do
         expect_any_instance_of(SkipCheck).to receive(:skip?).and_call_original
+
         subject.run_check(SkipCheck)
       end
 
@@ -153,6 +193,7 @@ describe SystemCheck::SimpleExecutor, lib: true do
 
       it 'does not execute #check when #skip? is true' do
         expect_any_instance_of(SkipCheck).not_to receive(:check?)
+
         subject.run_check(SkipCheck)
       end
     end
@@ -160,17 +201,20 @@ describe SystemCheck::SimpleExecutor, lib: true do
     context 'when implements a #multi_check' do
       it 'executes #multi_check method' do
         expect_any_instance_of(MultiCheck).to receive(:multi_check)
+
         subject.run_check(MultiCheck)
       end
 
       it 'does not execute #check method' do
         expect_any_instance_of(MultiCheck).not_to receive(:check)
+
         subject.run_check(MultiCheck)
       end
 
       context 'when check implements #skip?' do
         it 'executes #skip? method' do
           expect_any_instance_of(SkipMultiCheck).to receive(:skip?).and_call_original
+
           subject.run_check(SkipMultiCheck)
         end
       end

spec/lib/system_check_spec.rb

@@ -2,14 +2,6 @@ require 'spec_helper'
 require 'rake_helper'
 
 describe SystemCheck, lib: true do
-  subject { SystemCheck }
-
-  before do
-    silence_output
-  end
-
-  describe '.run' do
-    context 'custom matcher' do
   class SimpleCheck < SystemCheck::BaseCheck
     def check?
       true
@@ -22,19 +14,23 @@ describe SystemCheck, lib: true do
     end
   end
 
+  before do
+    silence_output
+  end
+
+  describe '.run' do
     subject { SystemCheck }
 
     it 'detects execution of SimpleCheck' do
       is_expected.to execute_check(SimpleCheck)
 
-        SystemCheck.run('Test', [SimpleCheck])
+      subject.run('Test', [SimpleCheck])
     end
 
     it 'detects exclusion of OtherCheck in execution' do
       is_expected.not_to execute_check(OtherCheck)
 
-        SystemCheck.run('Test', [SimpleCheck])
-      end
+      subject.run('Test', [SimpleCheck])
     end
   end
 end

spec/support/matchers/execute_check.rb

@@ -14,6 +14,10 @@ RSpec::Matchers.define :execute_check do |expected|
   end
 
   failure_message do |actual|
-    return 'This matcher must be used with SystemCheck' unless actual == SystemCheck
+    'This matcher must be used with SystemCheck' unless actual == SystemCheck
+  end
+
+  failure_message_when_negated do |actual|
+    'This matcher must be used with SystemCheck' unless actual == SystemCheck
   end
 end