Add specs for builder chain step that skipps pipelines

lib/gitlab/ci/pipeline/chain/skip.rb

@@ -24,7 +24,7 @@ module Gitlab
           def commit_message_skips_ci?
             return false unless @pipeline.git_commit_message
 
-            @skipped ||= @pipeline.git_commit_message =~ SKIP_PATTERN
+            @skipped ||= !!(@pipeline.git_commit_message =~ SKIP_PATTERN)
           end
         end
       end

spec/lib/gitlab/ci/pipeline/chain/skip_spec.rb

@@ -0,0 +1,85 @@
+require 'spec_helper'
+
+describe Gitlab::Ci::Pipeline::Chain::Skip do
+  set(:project) { create(:project) }
+  set(:user) { create(:user) }
+  set(:pipeline) { create(:ci_pipeline, project: project) }
+
+  let(:command) do
+    double('command', project: project,
+                      current_user: user,
+                      ignore_skip_ci: false,
+                      save_incompleted: true)
+  end
+
+  let(:step) { described_class.new(pipeline, command) }
+
+  context 'when pipeline has been skipped by a user' do
+    before do
+      allow(pipeline).to receive(:git_commit_message)
+        .and_return('commit message [ci skip]')
+
+      step.perform!
+    end
+
+    it 'should break the chain' do
+      expect(step.break?).to be true
+    end
+
+    it 'skips the pipeline' do
+      expect(pipeline.reload).to be_skipped
+    end
+  end
+
+  context 'when pipeline has not been skipped' do
+    before do
+      step.perform!
+    end
+
+    it 'should not break the chain' do
+      expect(step.break?).to be false
+    end
+
+    it 'should not skip a pipeline chain' do
+      expect(pipeline.reload).not_to be_skipped
+    end
+  end
+
+  context 'when [ci skip] should be ignored' do
+    let(:command) do
+      double('command', project: project,
+                        current_user: user,
+                        ignore_skip_ci: true)
+    end
+
+    it 'does not break the chain' do
+      step.perform!
+
+      expect(step.break?).to be false
+    end
+  end
+
+  context 'when pipeline should be skipped but not persisted' do
+    let(:command) do
+      double('command', project: project,
+                        current_user: user,
+                        ignore_skip_ci: false,
+                        save_incompleted: false)
+    end
+
+    before do
+      allow(pipeline).to receive(:git_commit_message)
+        .and_return('commit message [ci skip]')
+
+      step.perform!
+    end
+
+    it 'breaks the chain' do
+      expect(step.break?).to be true
+    end
+
+    it 'does not skip pipeline' do
+      expect(pipeline.reload).not_to be_skipped
+    end
+  end
+end