test: fix drain E2E flakiness (#49)

Author: Arvindthiru

test/e2e/drain_tool_test.go

@@ -276,6 +276,26 @@ var _ = Describe("Drain is allowed on one cluster, blocked on others - ClusterRe
 		}
 	})
 
+	It("should ensure no resources exist on drained clusters", func() {
+		for _, cluster := range drainClusters {
+			resourceRemovedActual := workNamespaceRemovedFromClusterActual(cluster)
+			Eventually(resourceRemovedActual, eventuallyDuration, eventuallyInterval).Should(Succeed(), "Failed to check if resources doesn't exist on member cluster")
+		}
+	})
+
+	It("should update cluster resource placement status as expected", func() {
+		crpStatusUpdatedActual := crpStatusUpdatedActual(workResourceIdentifiers(), noDrainClusterNames, nil, "0")
+		Eventually(crpStatusUpdatedActual, eventuallyDuration, eventuallyInterval).Should(Succeed(), "Failed to update cluster resource placement status as expected")
+		Consistently(crpStatusUpdatedActual, consistentlyDuration, consistentlyInterval).Should(Succeed(), "Failed to update cluster resource placement status as expected")
+	})
+
+	It("should still place resources on the selected clusters which were not drained", func() {
+		for _, cluster := range noDrainClusters {
+			resourcePlacedActual := workNamespaceAndConfigMapPlacedOnClusterActual(cluster)
+			Eventually(resourcePlacedActual, eventuallyDuration, eventuallyInterval).Should(Succeed(), "Failed to place resources on the selected clusters")
+		}
+	})
+
 	It("remove drain evictions for member cluster 1", func() {
 		for _, eviction := range drainEvictions {
 			ensureCRPEvictionDeleted(eviction.Name)