Merge pull request #504 from mbj/feature/sequence-reporter

Add sequence reporter

config/flay.yml

@@ -1,3 +1,3 @@
 ---
 threshold: 18
-total_score: 1169
+total_score: 1175

lib/mutant.rb

@@ -168,6 +168,7 @@ require 'mutant/runner/sink'
 require 'mutant/result'
 require 'mutant/reporter'
 require 'mutant/reporter/null'
+require 'mutant/reporter/sequence'
 require 'mutant/reporter/cli'
 require 'mutant/reporter/cli/printer'
 require 'mutant/reporter/cli/printer/config'

lib/mutant/reporter/sequence.rb

@@ -0,0 +1,22 @@
+module Mutant
+  class Reporter
+    class Sequence < self
+      include Concord.new(:reporters)
+
+      %i[warn progress report start].each do |name|
+        define_method(name) do |value|
+          reporters.each do |reporter|
+            reporter.public_send(name, value)
+          end
+
+          self
+        end
+      end
+
+      def delay
+        reporters.map(&:delay).min
+      end
+
+    end # Sequence
+  end # Reporter
+end # Mutant

spec/unit/mutant/reporter/null_spec.rb

@@ -2,21 +2,11 @@ RSpec.describe Mutant::Reporter::Null do
   let(:object) { described_class.new     }
   let(:value)  { instance_double(Object) }
 
-  describe '#report' do
-    subject { object.report(value) }
+  %i[progress report start warn].each do |name|
+    describe "##{name}" do
+      subject { object.public_send(name, value) }
 
-    it_should_behave_like 'a command method'
-  end
-
-  describe '#warn' do
-    subject { object.warn(value) }
-
-    it_should_behave_like 'a command method'
-  end
-
-  describe '#progress' do
-    subject { object.progress(value) }
-
-    it_should_behave_like 'a command method'
+      it_should_behave_like 'a command method'
+    end
   end
 end

spec/unit/mutant/reporter/sequence_spec.rb

@@ -0,0 +1,29 @@
+RSpec.describe Mutant::Reporter::Sequence do
+  let(:object)     { described_class.new([reporter_a, reporter_b]) }
+  let(:value)      { instance_double(Object)                       }
+  let(:reporter_a) { instance_double(Mutant::Reporter, delay: 1.0) }
+  let(:reporter_b) { instance_double(Mutant::Reporter, delay: 2.0) }
+
+  %i[report progress warn start].each do |name|
+    describe "##{name}" do
+      subject { object.public_send(name, value) }
+
+      before do
+        [reporter_a, reporter_b].each do |receiver|
+          expect(receiver).to receive(name)
+            .ordered
+            .with(value)
+            .and_return(receiver)
+        end
+      end
+
+      it_should_behave_like 'a command method'
+    end
+  end
+
+  describe '#delay' do
+    it 'returns the lowest value' do
+      expect(object.delay).to eql(1.0)
+    end
+  end
+end