[sdn_tests]: Adding inband sw interface dual switch test to pins_onda…

…tra. (sonic-net#12946)

* [sdn_tests]: Adding Installation test to pins_ondatra.

* [sdn_tests]: Adding inband sw interface dual switch test to pins_ondatra.

sdn_tests/pins_ondatra/tests/inband_sw_interface_dual_switch_test.go

@@ -0,0 +1,107 @@
+package inband_sw_interface_dual_switch_test
+
+import (
+	"net"
+	"testing"
+	"time"
+
+	"github.com/google/gopacket"
+	"github.com/google/gopacket/layers"
+	"github.com/openconfig/ondatra"
+	"github.com/openconfig/ondatra/gnmi"
+	"github.com/openconfig/ondatra/gnmi/oc"
+	"github.com/sonic-net/sonic-mgmt/sdn_tests/pins_ondatra/infrastructure/binding/pinsbind"
+	"github.com/sonic-net/sonic-mgmt/sdn_tests/pins_ondatra/infrastructure/testhelper/testhelper"
+)
+
+// These are the counters we track in these tests.
+type counters struct {
+	inPkts    uint64
+	outPkts   uint64
+	inOctets  uint64
+	outOctets uint64
+}
+
+var (
+	inbandSwIntfName           = "Loopback0"
+	interfaceIndex             = uint32(0)
+	configuredIPv4Path         = "6.7.8.9"
+	configuredIPv4PrefixLength = uint8(32)
+	configuredIPv6Path         = "3000::2"
+	configuredIPv6PrefixLength = uint8(128)
+	calledMockConfigPush       = false
+)
+
+// readCounters reads all the counters via GNMI and returns a counters struct.
+func readCounters(t *testing.T, dut *ondatra.DUTDevice, intf string) *counters {
+	t.Helper()
+	cntStruct := gnmi.Get(t, dut, gnmi.OC().Interface(intf).Counters().State())
+	return &counters{
+		inPkts:    cntStruct.GetInPkts(),
+		outPkts:   cntStruct.GetOutPkts(),
+		inOctets:  cntStruct.GetInOctets(),
+		outOctets: cntStruct.GetOutOctets(),
+	}
+}
+
+// showCountersDelta shows debug info after an unexpected change in counters.
+func showCountersDelta(t *testing.T, before *counters, after *counters, expect *counters) {
+	t.Helper()
+
+	for _, s := range []struct {
+		desc                  string
+		before, after, expect uint64
+	}{
+		{"in-pkts", before.inPkts, after.inPkts, expect.inPkts},
+		{"out-pkts", before.outPkts, after.outPkts, expect.outPkts},
+		{"in-octets", before.inOctets, after.inOctets, expect.inOctets},
+		{"out-octets", before.outOctets, after.outOctets, expect.outOctets},
+	} {
+		if s.before != s.after || s.expect != s.before {
+			t.Logf("%v %d -> %d expected %d (%+d)", s.desc, s.before, s.after, s.expect, s.after-s.before)
+		}
+	}
+}
+
+func mockConfigPush(t *testing.T) {
+	// Performs a mock config push by setting up the loopback0 interface database
+	// entries and the IPv4 and IPv6 addresses expected to be configured.
+	// TODO: Remove calls to this function once the helper function
+	// to perform a default config during setup is available.  See b/188927677.
+
+	if calledMockConfigPush {
+		return
+	}
+
+	// Create the loopback0 interface.
+	t.Logf("Config push for %v", inbandSwIntfName)
+	dut := ondatra.DUT(t, "DUT")
+	d := &oc.Root{}
+
+	newIface := d.GetOrCreateInterface(inbandSwIntfName)
+	newIface.Name = &inbandSwIntfName
+	newIface.Type = oc.IETFInterfaces_InterfaceType_softwareLoopback
+	gnmi.Replace(t, dut, gnmi.OC().Interface(inbandSwIntfName).Config(), newIface)
+
+	iface := d.GetOrCreateInterface(inbandSwIntfName).GetOrCreateSubinterface(interfaceIndex)
+
+	// Seed an IPv4 address for the loopback0 interface.
+	t.Logf("Config push for %v/%v", configuredIPv4Path, configuredIPv4PrefixLength)
+	newV4 := iface.GetOrCreateIpv4().GetOrCreateAddress(configuredIPv4Path)
+	newV4.Ip = &configuredIPv4Path
+	newV4.PrefixLength = &configuredIPv4PrefixLength
+	gnmi.Replace(t, dut, gnmi.OC().Interface(inbandSwIntfName).Subinterface(interfaceIndex).Ipv4().Address(configuredIPv4Path).Config(), newV4)
+
+	gnmi.Await(t, dut, gnmi.OC().Interface(inbandSwIntfName).Subinterface(interfaceIndex).Ipv4().Address(configuredIPv4Path).Ip().State(), 5*time.Second, configuredIPv4Path)
+
+	// Seed an IPv6 address for the loopback0 interface.
+	t.Logf("Config push for %v/%v", configuredIPv6Path, configuredIPv6PrefixLength)
+	newV6 := iface.GetOrCreateIpv6().GetOrCreateAddress(configuredIPv6Path)
+	newV6.Ip = &configuredIPv6Path
+	newV6.PrefixLength = &configuredIPv6PrefixLength
+	gnmi.Replace(t, dut, gnmi.OC().Interface(inbandSwIntfName).Subinterface(interfaceIndex).Ipv6().Address(configuredIPv6Path).Config(), newV6)
+
+	gnmi.Await(t, dut, gnmi.OC().Interface(inbandSwIntfName).Subinterface(interfaceIndex).Ipv6().Address(configuredIPv6Path).Ip().State(), 5*time.Second, configuredIPv6Path)
+
+	calledMockConfigPush = true
+}