[VOL-4420] Add support for POTS UNI ports to bbsim

Change-Id: Ibb817ced6086c3ef3001f338d98513101ce64c1c
diff --git a/internal/bbsim/devices/pots_port_test.go b/internal/bbsim/devices/pots_port_test.go
new file mode 100644
index 0000000..6a23b76
--- /dev/null
+++ b/internal/bbsim/devices/pots_port_test.go
@@ -0,0 +1,73 @@
+/*
+ * Copyright 2018-present Open Networking Foundation
+
+ * 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 devices
+
+import (
+	"testing"
+
+	bbsimTypes "github.com/opencord/bbsim/internal/bbsim/types"
+	"github.com/stretchr/testify/assert"
+)
+
+func createTestPots() (*PotsPort, error) {
+	onu := &Onu{
+		ID:           0,
+		SerialNumber: NewSN(1, 1, 1),
+		PonPortID:    0,
+		Channel:      make(chan bbsimTypes.Message),
+	}
+
+	pots, err := NewPotsPort(1, onu)
+
+	return pots, err
+}
+
+func Test_Pots_Create(t *testing.T) {
+	pots, err := createTestPots()
+
+	assert.Nil(t, err)
+	assert.NotNil(t, pots)
+
+	// check initial operational state
+	assert.Equal(t, pots.OperState.Current(), PotsStateDown)
+}
+
+func Test_Pots_OperationalState(t *testing.T) {
+	pots, _ := createTestPots()
+
+	assert.Equal(t, pots.OperState.Current(), PotsStateDown)
+
+	go func() {
+		//When it will be enabled
+		msg, ok := <-pots.Onu.Channel
+		assert.True(t, ok)
+		assert.Equal(t, uint8(0), msg.Data.(bbsimTypes.UniStatusAlarmMessage).AdminState)
+
+		//When it will be disabled
+		msg, ok = <-pots.Onu.Channel
+		assert.True(t, ok)
+		assert.Equal(t, uint8(1), msg.Data.(bbsimTypes.UniStatusAlarmMessage).AdminState)
+	}()
+
+	err := pots.Enable()
+	assert.Nil(t, err)
+	assert.Equal(t, PotsStateUp, pots.OperState.Current())
+
+	err = pots.Disable()
+	assert.Nil(t, err)
+	assert.Equal(t, PotsStateDown, pots.OperState.Current())
+}