From ce638ea496672bcd17ec5e6205f77dc62b054c43 Mon Sep 17 00:00:00 2001
From: ishan tyagi <ishan.tyagi@sap.com>
Date: Fri, 13 Jan 2023 18:10:14 +0530
Subject: [PATCH] Added unit tests.

---
 pkg/snapshot/snapshotter/snapshotter_test.go | 88 ++++++++++++++++++++
 1 file changed, 88 insertions(+)

diff --git a/pkg/snapshot/snapshotter/snapshotter_test.go b/pkg/snapshot/snapshotter/snapshotter_test.go
index 5545d9f8b..73c1fee3b 100644
--- a/pkg/snapshot/snapshotter/snapshotter_test.go
+++ b/pkg/snapshot/snapshotter/snapshotter_test.go
@@ -334,6 +334,94 @@ var _ = Describe("Snapshotter", func() {
 				})
 			})
 		})
+	})
+
+	Describe("Scenarios to take full-snapshot during startup", func() {
+		var (
+			ssr         *Snapshotter
+			currentMin  int
+			currentHour int
+		)
+		BeforeEach(func() {
+			currentHour = time.Now().Hour()
+			currentMin = time.Now().Minute()
+			snapstoreConfig = &brtypes.SnapstoreConfig{Container: path.Join(outputDir, "default.bkp")}
+			store, err = snapstore.GetSnapstore(snapstoreConfig)
+			Expect(err).ShouldNot(HaveOccurred())
+		})
+		Context("Previous full snapshot was taken more than 24hrs before, so FullSnapshot missed", func() {
+			It("should return true", func() {
+				snapshotterConfig := &brtypes.SnapshotterConfig{
+					FullSnapshotSchedule: fmt.Sprintf("%d %d * * *", (currentMin+1)%60, (currentHour+2)%24),
+				}
+
+				ssr, err = NewSnapshotter(logger, snapshotterConfig, store, etcdConnectionConfig, compressionConfig, healthConfig, snapstoreConfig)
+				Expect(err).ShouldNot(HaveOccurred())
+
+				// Previous full snapshot was taken 2 days before
+				ssr.PrevFullSnapshot = &brtypes.Snapshot{
+					CreatedOn: time.Date(time.Now().Year(), time.Now().Month(), time.Now().Day()-2, currentHour, currentMin, 0, 0, time.Local),
+				}
+				isFullSnapMissed := ssr.IsScheduledFullSnapshotMissed()
+				Expect(isFullSnapMissed).Should(BeTrue())
+			})
+		})
+
+		Context("Previous full snapshot was taken exactly at scheduled snapshot time, no FullSnapshot missed", func() {
+			It("should return false", func() {
+				snapshotterConfig := &brtypes.SnapshotterConfig{
+					FullSnapshotSchedule: fmt.Sprintf("%d %d * * *", (currentMin+1)%60, (currentHour+2)%24),
+				}
+
+				ssr, err = NewSnapshotter(logger, snapshotterConfig, store, etcdConnectionConfig, compressionConfig, healthConfig, snapstoreConfig)
+				Expect(err).ShouldNot(HaveOccurred())
+
+				// Previous full snapshot was taken 1 days before at exactly at scheduled time
+				ssr.PrevFullSnapshot = &brtypes.Snapshot{
+					CreatedOn: time.Date(time.Now().Year(), time.Now().Month(), time.Now().Day()-1, (currentHour+2)%24, (currentMin+1)%60, 0, 0, time.Local),
+				}
+				isFullSnapMissed := ssr.IsScheduledFullSnapshotMissed()
+				Expect(isFullSnapMissed).Should(BeFalse())
+			})
+		})
+
+		Context("Previous snapshot was taken within 24hrs and not gonna missed schedule fullsnapshot", func() {
+			It("should return false", func() {
+				scheduleHour := (currentHour + 4) % 24
+				snapshotterConfig := &brtypes.SnapshotterConfig{
+					FullSnapshotSchedule: fmt.Sprintf("%d %d * * *", currentMin, scheduleHour),
+				}
+
+				ssr, err = NewSnapshotter(logger, snapshotterConfig, store, etcdConnectionConfig, compressionConfig, healthConfig, snapstoreConfig)
+				Expect(err).ShouldNot(HaveOccurred())
+
+				// Previous full snapshot was taken 4hrs 10 mins before startup
+				ssr.PrevFullSnapshot = &brtypes.Snapshot{
+					CreatedOn: time.Date(time.Now().Year(), time.Now().Month(), time.Now().Day(), (currentHour-4)%24, (currentMin-10)%60, 0, 0, time.Local),
+				}
+				isFullSnapMissed := ssr.IsScheduledFullSnapshotMissed()
+				Expect(isFullSnapMissed).Should(BeFalse())
+			})
+		})
+
+		Context("Previous snapshot was taken within 24hrs and gonna miss 24hrs of schedule fullsnapshot window", func() {
+			It("should return true", func() {
+				scheduleHour := (currentHour + 8) % 24
+				snapshotterConfig := &brtypes.SnapshotterConfig{
+					FullSnapshotSchedule: fmt.Sprintf("%d %d * * *", currentMin, scheduleHour),
+				}
+
+				ssr, err = NewSnapshotter(logger, snapshotterConfig, store, etcdConnectionConfig, compressionConfig, healthConfig, snapstoreConfig)
+				Expect(err).ShouldNot(HaveOccurred())
+
+				// Previous full snapshot was taken 18hrs(<24hrs) before startup
+				ssr.PrevFullSnapshot = &brtypes.Snapshot{
+					CreatedOn: time.Date(time.Now().Year(), time.Now().Month(), time.Now().Day(), (currentHour-18)%24, (currentMin)%60, 0, 0, time.Local),
+				}
+				isFullSnapMissed := ssr.IsScheduledFullSnapshotMissed()
+				Expect(isFullSnapMissed).Should(BeTrue())
+			})
+		})
 
 		Context("##GarbageCollector", func() {
 			var (