1 files changed, 18 insertions, 0 deletions
diff --git a/spec/lib/gitlab/ci/input/arguments/unknown_spec.rb b/spec/lib/gitlab/ci/input/arguments/unknown_spec.rb
new file mode 100644
index 00000000000..1270423ac72
--- /dev/null
+++ b/spec/lib/gitlab/ci/input/arguments/unknown_spec.rb
@@ -0,0 +1,18 @@
+# frozen_string_literal: true
+
+require 'fast_spec_helper'
+
+RSpec.describe Gitlab::Ci::Input::Arguments::Unknown, feature_category: :pipeline_composition do
+  it 'raises an error when someone tries to evaluate the value' do
+    argument = described_class.new(:website, nil, 'https://example.gitlab.com')
+
+    expect(argument).not_to be_valid
+    expect { argument.to_value }.to raise_error ArgumentError
+  end
+
+  describe '.matches?' do
+    it 'always matches' do
+      expect(described_class.matches?('abc')).to be true
+    end
+  end
+end