1 files changed, 37 insertions, 0 deletions
diff --git a/spec/lib/gitlab/ci/build/rules/rule/clause_spec.rb b/spec/lib/gitlab/ci/build/rules/rule/clause_spec.rb
new file mode 100644
index 00000000000..faede7a361f
--- /dev/null
+++ b/spec/lib/gitlab/ci/build/rules/rule/clause_spec.rb
@@ -0,0 +1,37 @@
+# frozen_string_literal: true
+
+require 'spec_helper'
+
+RSpec.describe Gitlab::Ci::Build::Rules::Rule::Clause do
+  describe '.fabricate' do
+    using RSpec::Parameterized::TableSyntax
+
+    let(:value) { 'some value' }
+
+    subject { described_class.fabricate(type, value) }
+
+    context 'when type is valid' do
+      where(:type, :result) do
+        'changes' | Gitlab::Ci::Build::Rules::Rule::Clause::Changes
+        'exists'  | Gitlab::Ci::Build::Rules::Rule::Clause::Exists
+        'if'      | Gitlab::Ci::Build::Rules::Rule::Clause::If
+      end
+
+      with_them do
+        it { is_expected.to be_instance_of(result) }
+      end
+    end
+
+    context 'when type is invalid' do
+      let(:type) { 'when' }
+
+      it { is_expected.to be_nil }
+
+      context "when type is 'variables'" do
+        let(:type) { 'variables' }
+
+        it { is_expected.to be_nil }
+      end
+    end
+  end
+end