1 files changed, 47 insertions, 0 deletions
diff --git a/spec/validators/cron_validator_spec.rb b/spec/validators/cron_validator_spec.rb
new file mode 100644
index 00000000000..d6605610402
--- /dev/null
+++ b/spec/validators/cron_validator_spec.rb
@@ -0,0 +1,47 @@
+# frozen_string_literal: true
+
+require 'spec_helper'
+
+describe CronValidator do
+  subject do
+    Class.new do
+      include ActiveModel::Model
+      include ActiveModel::Validations
+      attr_accessor :cron
+      validates :cron, cron: true
+
+      def cron_timezone
+        'UTC'
+      end
+    end.new
+  end
+
+  it 'validates valid crontab' do
+    subject.cron = '0 23 * * 5'
+
+    expect(subject.valid?).to be_truthy
+  end
+
+  it 'validates invalid crontab' do
+    subject.cron = 'not a cron'
+
+    expect(subject.valid?).to be_falsy
+  end
+
+  context 'cron field is not whitelisted' do
+    subject do
+      Class.new do
+        include ActiveModel::Model
+        include ActiveModel::Validations
+        attr_accessor :cron_partytime
+        validates :cron_partytime, cron: true
+      end.new
+    end
+
+    it 'raises an error' do
+      subject.cron_partytime = '0 23 * * 5'
+
+      expect { subject.valid? }.to raise_error(StandardError, "Non-whitelisted attribute")
+    end
+  end
+end