1 files changed, 41 insertions, 0 deletions
diff --git a/spec/lib/gitlab/ci/config/node/null_spec.rb b/spec/lib/gitlab/ci/config/node/null_spec.rb
new file mode 100644
index 00000000000..1ab5478dcfa
--- /dev/null
+++ b/spec/lib/gitlab/ci/config/node/null_spec.rb
@@ -0,0 +1,41 @@
+require 'spec_helper'
+
+describe Gitlab::Ci::Config::Node::Null do
+  let(:null) { described_class.new(nil) }
+
+  describe '#leaf?' do
+    it 'is leaf node' do
+      expect(null).to be_leaf
+    end
+  end
+
+  describe '#valid?' do
+    it 'is always valid' do
+      expect(null).to be_valid
+    end
+  end
+
+  describe '#errors' do
+    it 'is does not contain errors' do
+      expect(null.errors).to be_empty
+    end
+  end
+
+  describe '#value' do
+    it 'returns nil' do
+      expect(null.value).to eq nil
+    end
+  end
+
+  describe '#relevant?' do
+    it 'is not relevant' do
+      expect(null.relevant?).to eq false
+    end
+  end
+
+  describe '#specified?' do
+    it 'is not defined' do
+      expect(null.specified?).to eq false
+    end
+  end
+end