1 files changed, 111 insertions, 0 deletions
diff --git a/spec/requests/api/lint_spec.rb b/spec/requests/api/lint_spec.rb
index 6b5a4b6436a..3892df273bd 100644
--- a/spec/requests/api/lint_spec.rb
+++ b/spec/requests/api/lint_spec.rb
@@ -75,4 +75,115 @@ RSpec.describe API::Lint do
       end
     end
   end
+
+  describe 'GET /projects/:id/ci/lint' do
+    subject(:ci_lint) { get api("/projects/#{project.id}/ci/lint", api_user), params: { dry_run: dry_run } }
+
+    let_it_be(:api_user) { create(:user) }
+    let(:project) { create(:project, :repository) }
+    let(:dry_run) { nil }
+
+    RSpec.shared_examples 'valid config' do
+      it 'passes validation' do
+        ci_lint
+
+        included_config = YAML.safe_load(included_content, [Symbol])
+        root_config = YAML.safe_load(yaml_content, [Symbol])
+        expected_yaml = included_config.merge(root_config).except(:include).to_yaml
+
+        expect(response).to have_gitlab_http_status(:ok)
+        expect(json_response).to be_an Hash
+        expect(json_response['merged_yaml']).to eq(expected_yaml)
+        expect(json_response['valid']).to eq(true)
+        expect(json_response['errors']).to eq([])
+      end
+    end
+
+    RSpec.shared_examples 'invalid config' do
+      it 'responds with errors about invalid configuration' do
+        ci_lint
+
+        expect(response).to have_gitlab_http_status(:ok)
+        expect(json_response['merged_yaml']).to eq(yaml_content)
+        expect(json_response['valid']).to eq(false)
+        expect(json_response['errors']).to eq(['jobs config should contain at least one visible job'])
+      end
+    end
+
+    context 'when unauthenticated' do
+      it 'returns authentication error' do
+        ci_lint
+
+        expect(response).to have_gitlab_http_status(:not_found)
+      end
+    end
+
+    context 'when authenticated as project member' do
+      before do
+        project.add_developer(api_user)
+      end
+
+      context 'with valid .gitlab-ci.yml content' do
+        let(:yaml_content) do
+          { include: { local: 'another-gitlab-ci.yml' }, test: { stage: 'test', script: 'echo 1' } }.to_yaml
+        end
+
+        let(:included_content) do
+          { another_test: { stage: 'test', script: 'echo 1' } }.to_yaml
+        end
+
+        before do
+          project.repository.create_file(
+            project.creator,
+            '.gitlab-ci.yml',
+            yaml_content,
+            message: 'Automatically created .gitlab-ci.yml',
+            branch_name: 'master'
+          )
+
+          project.repository.create_file(
+            project.creator,
+            'another-gitlab-ci.yml',
+            included_content,
+            message: 'Automatically created another-gitlab-ci.yml',
+            branch_name: 'master'
+          )
+        end
+
+        context 'when running as dry run' do
+          let(:dry_run) { true }
+
+          it_behaves_like 'valid config'
+        end
+
+        context 'when running static validation' do
+          let(:dry_run) { false }
+
+          it_behaves_like 'valid config'
+        end
+      end
+
+      context 'with invalid .gitlab-ci.yml content' do
+        let(:yaml_content) do
+          { image: 'ruby:2.7', services: ['postgres'] }.to_yaml
+        end
+
+        before do
+          stub_ci_pipeline_yaml_file(yaml_content)
+        end
+
+        context 'when running as dry run' do
+          let(:dry_run) { true }
+
+          it_behaves_like 'invalid config'
+        end
+
+        context 'when running static validation' do
+          let(:dry_run) { false }
+
+          it_behaves_like 'invalid config'
+        end
+      end
+    end
+  end
 end