Add vs test case for swss warm restart port state sync up.

Signed-off-by: Jipan Yang <jipan.yang@alibaba-inc.com>

tests/test_warm_reboot.py

@@ -55,4 +55,77 @@ def test_swss_warm_restore(dvs):
         else:
             assert False
 
+def test_swss_port_state_syncup(dvs):
+    # syncd warm start with temp view not supported yet
+    if dvs.tmpview == True:
+        return
+
+    dvs.runcmd("/usr/bin/stop_swss.sh")
+    time.sleep(3)
+    dvs.runcmd("mv /var/log/swss/sairedis.rec /var/log/swss/sairedis.rec.b")
+
+    dvs.runcmd("ifconfig Ethernet0 10.0.0.0/31 up")
+    dvs.runcmd("ifconfig Ethernet4 10.0.0.2/31 up")
+    dvs.runcmd("ifconfig Ethernet8 10.0.0.4/31 up")
+
+    dvs.runcmd("arp -s 10.0.0.1 00:00:00:00:00:01")
+    dvs.runcmd("arp -s 10.0.0.3 00:00:00:00:00:02")
+    dvs.runcmd("arp -s 10.0.0.5 00:00:00:00:00:03")
+
+    dvs.servers[0].runcmd("ip link set down dev eth0") == 0
+    dvs.servers[1].runcmd("ip link set down dev eth0") == 0
+    dvs.servers[2].runcmd("ip link set down dev eth0") == 0
+    dvs.servers[2].runcmd("ip link set up dev eth0") == 0
+
+    time.sleep(1)
+    dvs.runcmd("/usr/bin/start_swss.sh")
+    time.sleep(10)
+
+    db = swsscommon.DBConnector(0, dvs.redis_sock, 0)
+
+    warmtbl = swsscommon.Table(db, "WARM_START_TABLE")
+
+    keys = warmtbl.getKeys()
+    print(keys)
+
+    (status, fvs) = warmtbl.get("vlanmgrd")
+    assert status == True
+    for fv in fvs:
+        if fv[0] == "restart_count":
+            assert fv[1] == "2"
+        else:
+            assert False
+
+    (status, fvs) = warmtbl.get("portsyncd")
+    assert status == True
+    for fv in fvs:
+        if fv[0] == "restart_count":
+            assert fv[1] == "2"
+        else:
+            assert False
+
+    (status, fvs) = warmtbl.get("orchagent")
+    assert status == True
+    for fv in fvs:
+        if fv[0] == "restart_count":
+            assert fv[1] == "2"
+        else:
+            assert False
+
+    tbl = swsscommon.Table(db, "PORT_TABLE")
+
+    for i in [0, 1, 2]:
+        (status, fvs) = tbl.get("Ethernet%d" % (i * 4))
+        assert status == True
+
+        oper_status = "unknown"
+
+        for v in fvs:
+            if v[0] == "oper_status":
+                oper_status = v[1]
+                break
+        if i == 2:
+            assert oper_status == "up"
+        else:
+            assert oper_status == "down"