1 files changed, 50 insertions, 0 deletions
diff --git a/spec/lib/gitlab/ci/config/loader_spec.rb b/spec/lib/gitlab/ci/config/loader_spec.rb
new file mode 100644
index 00000000000..2d44b1f60f1
--- /dev/null
+++ b/spec/lib/gitlab/ci/config/loader_spec.rb
@@ -0,0 +1,50 @@
+require 'spec_helper'
+
+describe Gitlab::Ci::Config::Loader do
+  let(:loader) { described_class.new(yml) }
+
+  context 'when yaml syntax is correct' do
+    let(:yml) { 'image: ruby:2.2' }
+
+    describe '#valid?' do
+      it 'returns true' do
+        expect(loader.valid?).to be true
+      end
+    end
+
+    describe '#load!' do
+      it 'returns a valid hash' do
+        expect(loader.load!).to eq(image: 'ruby:2.2')
+      end
+    end
+  end
+
+  context 'when yaml syntax is incorrect' do
+    let(:yml) { '// incorrect' }
+
+    describe '#valid?' do
+      it 'returns false' do
+        expect(loader.valid?).to be false
+      end
+    end
+
+    describe '#load!' do
+      it 'raises error' do
+        expect { loader.load! }.to raise_error(
+          Gitlab::Ci::Config::Loader::FormatError,
+          'Invalid configuration format'
+        )
+      end
+    end
+  end
+
+  context 'when yaml config is empty' do
+    let(:yml) { '' }
+
+    describe '#valid?' do
+      it 'returns false' do
+        expect(loader.valid?).to be false
+      end
+    end
+  end
+end