1 files changed, 70 insertions, 0 deletions
diff --git a/spec/lib/gitlab/ci/config/header/input_spec.rb b/spec/lib/gitlab/ci/config/header/input_spec.rb
new file mode 100644
index 00000000000..73b5b8f9497
--- /dev/null
+++ b/spec/lib/gitlab/ci/config/header/input_spec.rb
@@ -0,0 +1,70 @@
+# frozen_string_literal: true
+
+require 'spec_helper'
+
+RSpec.describe Gitlab::Ci::Config::Header::Input, feature_category: :pipeline_composition do
+  let(:factory) do
+    Gitlab::Config::Entry::Factory
+      .new(described_class)
+      .value(input_hash)
+      .with(key: input_name)
+  end
+
+  let(:input_name) { 'foo' }
+
+  subject(:config) { factory.create!.tap(&:compose!) }
+
+  shared_examples 'a valid input' do
+    let(:expected_hash) { input_hash }
+
+    it 'passes validations' do
+      expect(config).to be_valid
+      expect(config.errors).to be_empty
+    end
+
+    it 'returns the value' do
+      expect(config.value).to eq(expected_hash)
+    end
+  end
+
+  shared_examples 'an invalid input' do
+    let(:expected_hash) { input_hash }
+
+    it 'fails validations' do
+      expect(config).not_to be_valid
+      expect(config.errors).to eq(expected_errors)
+    end
+
+    it 'returns the value' do
+      expect(config.value).to eq(expected_hash)
+    end
+  end
+
+  context 'when has a default value' do
+    let(:input_hash) { { default: 'bar' } }
+
+    it_behaves_like 'a valid input'
+  end
+
+  context 'when is a required required input' do
+    let(:input_hash) { nil }
+
+    it_behaves_like 'a valid input'
+  end
+
+  context 'when contains unknown keywords' do
+    let(:input_hash) { { test: 123 } }
+    let(:expected_errors) { ['foo config contains unknown keys: test'] }
+
+    it_behaves_like 'an invalid input'
+  end
+
+  context 'when has invalid name' do
+    let(:input_name) { [123] }
+    let(:input_hash) { {} }
+
+    let(:expected_errors) { ['123 key must be an alphanumeric string'] }
+
+    it_behaves_like 'an invalid input'
+  end
+end