1 files changed, 186 insertions, 0 deletions
diff --git a/spec/lib/gitlab/ci/cron_parser_spec.rb b/spec/lib/gitlab/ci/cron_parser_spec.rb
new file mode 100644
index 00000000000..809fda11879
--- /dev/null
+++ b/spec/lib/gitlab/ci/cron_parser_spec.rb
@@ -0,0 +1,186 @@
+require 'spec_helper'
+
+describe Gitlab::Ci::CronParser do
+  shared_examples_for "returns time in the future" do
+    it { is_expected.to be > Time.now }
+  end
+
+  describe '#next_time_from' do
+    subject { described_class.new(cron, cron_timezone).next_time_from(Time.now) }
+
+    context 'when cron and cron_timezone are valid' do
+      context 'when specific time' do
+        let(:cron) { '3 4 5 6 *' }
+        let(:cron_timezone) { 'UTC' }
+
+        it_behaves_like "returns time in the future"
+
+        it 'returns exact time' do
+          expect(subject.min).to eq(3)
+          expect(subject.hour).to eq(4)
+          expect(subject.day).to eq(5)
+          expect(subject.month).to eq(6)
+        end
+      end
+
+      context 'when specific day of week' do
+        let(:cron) { '* * * * 0' }
+        let(:cron_timezone) { 'UTC' }
+
+        it_behaves_like "returns time in the future"
+
+        it 'returns exact day of week' do
+          expect(subject.wday).to eq(0)
+        end
+      end
+
+      context 'when slash used' do
+        let(:cron) { '*/10 */6 */10 */10 *' }
+        let(:cron_timezone) { 'UTC' }
+
+        it_behaves_like "returns time in the future"
+
+        it 'returns specific time' do
+          expect(subject.min).to be_in([0, 10, 20, 30, 40, 50])
+          expect(subject.hour).to be_in([0, 6, 12, 18])
+          expect(subject.day).to be_in([1, 11, 21, 31])
+          expect(subject.month).to be_in([1, 11])
+        end
+      end
+
+      context 'when range used' do
+        let(:cron) { '0,20,40 * 1-5 * *' }
+        let(:cron_timezone) { 'UTC' }
+
+        it_behaves_like "returns time in the future"
+
+        it 'returns specific time' do
+          expect(subject.min).to be_in([0, 20, 40])
+          expect(subject.day).to be_in((1..5).to_a)
+        end
+      end
+
+      context 'when cron_timezone is TZInfo format' do
+        before do
+          allow(Time).to receive(:zone)
+            .and_return(ActiveSupport::TimeZone['UTC'])
+        end
+
+        let(:hour_in_utc) do
+          ActiveSupport::TimeZone[cron_timezone]
+            .now.change(hour: 0).in_time_zone('UTC').hour
+        end
+
+        context 'when cron_timezone is US/Pacific' do
+          let(:cron) { '* 0 * * *' }
+          let(:cron_timezone) { 'US/Pacific' }
+
+          it_behaves_like "returns time in the future"
+
+          it 'converts time in server time zone' do
+            expect(subject.hour).to eq(hour_in_utc)
+          end
+        end
+      end
+
+      context 'when cron_timezone is ActiveSupport::TimeZone format' do
+        before do
+          allow(Time).to receive(:zone)
+            .and_return(ActiveSupport::TimeZone['UTC'])
+        end
+
+        let(:hour_in_utc) do
+          ActiveSupport::TimeZone[cron_timezone]
+            .now.change(hour: 0).in_time_zone('UTC').hour
+        end
+
+        context 'when cron_timezone is Berlin' do
+          let(:cron) { '* 0 * * *' }
+          let(:cron_timezone) { 'Berlin' }
+
+          it_behaves_like "returns time in the future"
+
+          it 'converts time in server time zone' do
+            expect(subject.hour).to eq(hour_in_utc)
+          end
+        end
+
+        context 'when cron_timezone is Eastern Time (US & Canada)' do
+          let(:cron) { '* 0 * * *' }
+          let(:cron_timezone) { 'Eastern Time (US & Canada)' }
+
+          it_behaves_like "returns time in the future"
+
+          it 'converts time in server time zone' do
+            expect(subject.hour).to eq(hour_in_utc)
+          end
+        end
+      end
+    end
+
+    context 'when cron and cron_timezone are invalid' do
+      let(:cron) { 'invalid_cron' }
+      let(:cron_timezone) { 'invalid_cron_timezone' }
+
+      it { is_expected.to be_nil }
+    end
+
+    context 'when cron syntax is quoted' do
+      let(:cron) { "'0 * * * *'" }
+      let(:cron_timezone) { 'UTC' }
+
+      it { expect(subject).to be_nil }
+    end
+
+    context 'when cron syntax is rufus-scheduler syntax' do
+      let(:cron) { 'every 3h' }
+      let(:cron_timezone) { 'UTC' }
+
+      it { expect(subject).to be_nil }
+    end
+  end
+
+  describe '#cron_valid?' do
+    subject { described_class.new(cron, Gitlab::Ci::CronParser::VALID_SYNTAX_SAMPLE_TIME_ZONE).cron_valid? }
+
+    context 'when cron is valid' do
+      let(:cron) { '* * * * *' }
+
+      it { is_expected.to eq(true) }
+    end
+
+    context 'when cron is invalid' do
+      let(:cron) { '*********' }
+
+      it { is_expected.to eq(false) }
+    end
+
+    context 'when cron syntax is quoted' do
+      let(:cron) { "'0 * * * *'" }
+
+      it { is_expected.to eq(false) }
+    end
+  end
+
+  describe '#cron_timezone_valid?' do
+    subject { described_class.new(Gitlab::Ci::CronParser::VALID_SYNTAX_SAMPLE_CRON, cron_timezone).cron_timezone_valid? }
+
+    context 'when cron is valid' do
+      let(:cron_timezone) { 'Europe/Istanbul' }
+
+      it { is_expected.to eq(true) }
+    end
+
+    context 'when cron is invalid' do
+      let(:cron_timezone) { 'Invalid-zone' }
+
+      it { is_expected.to eq(false) }
+    end
+
+    context 'when cron_timezone is ActiveSupport::TimeZone format' do
+      let(:cron_timezone) { 'Eastern Time (US & Canada)' }
+
+      it { is_expected.to eq(true) }
+    end
+  end
+end