1 files changed, 94 insertions, 0 deletions
diff --git a/spec/lib/gitlab/ci/config/entry/product/parallel_spec.rb b/spec/lib/gitlab/ci/config/entry/product/parallel_spec.rb
new file mode 100644
index 00000000000..bc09e20d748
--- /dev/null
+++ b/spec/lib/gitlab/ci/config/entry/product/parallel_spec.rb
@@ -0,0 +1,94 @@
+# frozen_string_literal: true
+
+require 'fast_spec_helper'
+require_dependency 'active_model'
+
+RSpec.describe ::Gitlab::Ci::Config::Entry::Product::Parallel do
+  subject(:parallel) { described_class.new(config) }
+
+  context 'with invalid config' do
+    shared_examples 'invalid config' do |error_message|
+      describe '#valid?' do
+        it { is_expected.not_to be_valid }
+      end
+
+      describe '#errors' do
+        it 'returns error about invalid type' do
+          expect(parallel.errors).to match(a_collection_including(error_message))
+        end
+      end
+    end
+
+    context 'when it is not a numeric value' do
+      let(:config) { true }
+
+      it_behaves_like 'invalid config', /should be an integer or a hash/
+    end
+
+    context 'when it is lower than two' do
+      let(:config) { 1 }
+
+      it_behaves_like 'invalid config', /must be greater than or equal to 2/
+    end
+
+    context 'when it is bigger than 50' do
+      let(:config) { 51 }
+
+      it_behaves_like 'invalid config', /must be less than or equal to 50/
+    end
+
+    context 'when it is not an integer' do
+      let(:config) { 1.5 }
+
+      it_behaves_like 'invalid config', /must be an integer/
+    end
+
+    context 'with empty hash config' do
+      let(:config) { {} }
+
+      it_behaves_like 'invalid config', /matrix builds config missing required keys: matrix/
+    end
+  end
+
+  context 'with numeric config' do
+    context 'when job is specified' do
+      let(:config) { 2 }
+
+      describe '#valid?' do
+        it { is_expected.to be_valid }
+      end
+
+      describe '#value' do
+        it 'returns job needs configuration' do
+          expect(parallel.value).to match(number: config)
+        end
+      end
+    end
+  end
+
+  context 'with matrix builds config' do
+    context 'when matrix is specified' do
+      let(:config) do
+        {
+          matrix: [
+            { PROVIDER: 'aws', STACK: %w[monitoring app1 app2] },
+            { PROVIDER: 'gcp', STACK: %w[data processing] }
+          ]
+        }
+      end
+
+      describe '#valid?' do
+        it { is_expected.to be_valid }
+      end
+
+      describe '#value' do
+        it 'returns job needs configuration' do
+          expect(parallel.value).to match(matrix: [
+            { PROVIDER: 'aws', STACK: %w[monitoring app1 app2] },
+            { PROVIDER: 'gcp', STACK: %w[data processing] }
+          ])
+        end
+      end
+    end
+  end
+end