Improve the unit test coverage for portcache

Signed-off-by: Pulkit Jain <jainpu@vmware.com>

pkg/agent/nodeportlocal/portcache/port_table_test.go

@@ -22,12 +22,11 @@ import (
 	"time"
 
 	"github.com/golang/mock/gomock"
+	"k8s.io/client-go/tools/cache"
 
 	portcachetesting "antrea.io/antrea/pkg/agent/nodeportlocal/portcache/testing"
 	"antrea.io/antrea/pkg/agent/nodeportlocal/rules"
 	rulestesting "antrea.io/antrea/pkg/agent/nodeportlocal/rules/testing"
-
-	"k8s.io/client-go/tools/cache"
 )
 
 const (

pkg/agent/nodeportlocal/portcache/port_table_windows_test.go

@@ -0,0 +1,109 @@
+//go:build windows
+// +build windows
+
+// Copyright 2022 Antrea Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package portcache
+
+import (
+	"testing"
+	"time"
+
+	"github.com/golang/mock/gomock"
+
+	portcachetesting "antrea.io/antrea/pkg/agent/nodeportlocal/portcache/testing"
+	"antrea.io/antrea/pkg/agent/nodeportlocal/rules"
+	rulestesting "antrea.io/antrea/pkg/agent/nodeportlocal/rules/testing"
+
+	"k8s.io/client-go/tools/cache"
+)
+
+const (
+	startPort = 61000
+	endPort   = 65000
+)
+
+func newPortTable(mockIPTables rules.PodPortRules, mockPortOpener LocalPortOpener) *PortTable {
+	return &PortTable{
+		PortTableCache: cache.NewIndexer(GetPortTableKey, cache.Indexers{
+			NodePortIndex:    NodePortIndexFunc,
+			PodEndpointIndex: PodEndpointIndexFunc,
+			PodIPIndex:       PodIPIndexFunc,
+		}),
+		StartPort:       startPort,
+		EndPort:         endPort,
+		PortSearchStart: startPort,
+		PodPortRules:    mockIPTables,
+		LocalPortOpener: mockPortOpener,
+	}
+}
+
+func TestRestoreRules(t *testing.T) {
+	mockCtrl := gomock.NewController(t)
+	defer mockCtrl.Finish()
+	mockIPTables := rulestesting.NewMockPodPortRules(mockCtrl)
+	mockPortOpener := portcachetesting.NewMockLocalPortOpener(mockCtrl)
+	portTable := newPortTable(mockIPTables, mockPortOpener)
+	podIP := "10.0.0.1"
+	nodePort1 := startPort
+	nodePort2 := startPort + 1
+	allNPLPorts := []rules.PodNodePort{
+		{
+			NodePort: nodePort1,
+			PodPort:  1001,
+			PodIP:    podIP,
+			Protocol: "tcp",
+		},
+		{
+			NodePort: nodePort1,
+			PodPort:  1001,
+			PodIP:    podIP,
+			Protocol: "udp",
+		},
+		{
+			NodePort: nodePort2,
+			PodPort:  1002,
+			PodIP:    podIP,
+			Protocol: "udp",
+		},
+	}
+
+	mockIPTables.EXPECT().AddRule(nodePort1, podIP, 1001, "tcp")
+	mockIPTables.EXPECT().AddRule(nodePort1, podIP, 1001, "udp")
+	mockIPTables.EXPECT().AddRule(nodePort2, podIP, 1002, "udp")
+
+	syncedCh := make(chan struct{})
+	const timeout = 1 * time.Second
+	portTable.RestoreRules(allNPLPorts, syncedCh)
+	select {
+	case <-syncedCh:
+		break
+	case <-time.After(timeout):
+		// this will not kill the goroutine created by RestoreRules,
+		// which should be acceptable.
+		t.Fatalf("Rule restoration not complete after %v", timeout)
+	}
+}
+
+func TestDeleteRule(t *testing.T) {
+	mockCtrl := gomock.NewController(t)
+	defer mockCtrl.Finish()
+	mockIPTables := rulestesting.NewMockPodPortRules(mockCtrl)
+	mockPortOpener := portcachetesting.NewMockLocalPortOpener(mockCtrl)
+	portTable := newPortTable(mockIPTables, mockPortOpener)
+	podIP := "10.0.0.1"
+
+	portTable.DeleteRule(podIP, 1001, "tcp")
+}