fix #272 fix error on concentrator list

src/AzureIoTHub.Portal.Server.Tests/Controllers/v1.0/LoRaWAN/LoRaWANConcentratorsControllerTest.cs

@@ -0,0 +1,134 @@
+using Azure;
+using Azure.Data.Tables;
+using AzureIoTHub.Portal.Server.Controllers.V10.LoRaWAN;
+using AzureIoTHub.Portal.Server.Factories;
+using AzureIoTHub.Portal.Server.Managers;
+using AzureIoTHub.Portal.Server.Mappers;
+using AzureIoTHub.Portal.Server.Services;
+using AzureIoTHub.Portal.Shared.Models.V10.Device;
+using AzureIoTHub.Portal.Shared.Models.V10.LoRaWAN.Concentrator;
+using AzureIoTHub.Portal.Shared.Models.V10.LoRaWAN.LoRaDevice;
+using AzureIoTHub.Portal.Shared.Models.V10.LoRaWAN.LoRaDeviceModel;
+using Microsoft.AspNetCore.Mvc;
+using Microsoft.Azure.Devices;
+using Microsoft.Azure.Devices.Shared;
+using Microsoft.Extensions.Logging;
+using Moq;
+using NUnit.Framework;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Net;
+using System.Net.Http;
+using System.Threading;
+using System.Threading.Tasks;
+namespace AzureIoTHub.Portal.Server.Tests.Controllers.v10.LoRaWAN
+{
+    [TestFixture]
+    public class LoRaWANConcentratorsControllerTest
+    {
+        private MockRepository mockRepository;
+
+        private Mock<ILogger<LoRaWANConcentratorsController>> mockLogger;
+        private Mock<IDeviceService> mockDeviceService;
+        private Mock<IRouterConfigManager> mockRouterConfigManager;
+        private Mock<IConcentratorTwinMapper> mockConcentratorTwinMapper;
+
+        [SetUp]
+        public void SetUp()
+        {
+            this.mockRepository = new MockRepository(MockBehavior.Strict);
+            this.mockLogger = this.mockRepository.Create<ILogger<LoRaWANConcentratorsController>>();
+            this.mockDeviceService = this.mockRepository.Create<IDeviceService>();
+            this.mockRouterConfigManager = this.mockRepository.Create<IRouterConfigManager>();
+            this.mockConcentratorTwinMapper = this.mockRepository.Create<IConcentratorTwinMapper>();
+        }
+
+        private LoRaWANConcentratorsController CreateLoRaWANConcentratorsController()
+        {
+            return new LoRaWANConcentratorsController(
+                this.mockLogger.Object,
+                this.mockDeviceService.Object,
+                this.mockRouterConfigManager.Object,
+                this.mockConcentratorTwinMapper.Object);
+        }
+
+        [Test]
+        public async Task GetAllDeviceConcentrator_With_deviceType_Should_return_not_empty_list()
+        {
+            // Arrange
+            var concentratorsController = CreateLoRaWANConcentratorsController();
+            int count = 100;
+            TwinCollection twinCollection = new TwinCollection();
+            twinCollection["deviceType"] = "LoRa Concentrator";
+
+            this.mockDeviceService.Setup(c => c.GetAllDevice(
+                    It.Is<string>(x => x == "LoRa Concentrator"),
+                    It.Is<string>(x => string.IsNullOrEmpty(x))))
+                .ReturnsAsync(Enumerable.Range(0, 100).Select(x => new Twin
+                {
+                    DeviceId = x.ToString(),
+                    Tags = twinCollection
+                }));
+
+            this.mockConcentratorTwinMapper.Setup(c => c.CreateDeviceDetails(It.IsAny<Twin>()))
+                .Returns<Twin>(x => new Concentrator
+                {
+                    DeviceId = x.DeviceId
+                });
+
+            // Act
+            var response = await concentratorsController.GetAllDeviceConcentrator().ConfigureAwait(false);
+
+            // Assert
+            Assert.IsNotNull(response.Result);
+            Assert.IsAssignableFrom<OkObjectResult>(response.Result);
+            var okObjectResult = response.Result as ObjectResult;
+
+            Assert.IsNotNull(okObjectResult);
+            Assert.AreEqual(200, okObjectResult.StatusCode);
+            Assert.IsNotNull(okObjectResult.Value);
+            var deviceList = okObjectResult.Value as IEnumerable<Concentrator>;
+
+            Assert.IsNotNull(deviceList);
+            Assert.AreEqual(count, deviceList.Count());
+
+            this.mockRepository.VerifyAll();
+        }
+
+        [Test]
+        public async Task GetAllDeviceConcentrator_With_no_deviceType_Should_return_empty_list()
+        {
+            // Arrange
+            var concentratorsController = CreateLoRaWANConcentratorsController();
+            int count = 100;
+            TwinCollection twinCollection = new TwinCollection();
+
+            this.mockDeviceService.Setup(c => c.GetAllDevice(
+                    It.Is<string>(x => x == "LoRa Concentrator"),
+                    It.Is<string>(x => string.IsNullOrEmpty(x))))
+                .ReturnsAsync(Enumerable.Range(0, 0).Select(x => new Twin
+                {
+                    DeviceId = x.ToString()
+                }));
+
+            // Act
+            var response = await concentratorsController.GetAllDeviceConcentrator().ConfigureAwait(false);
+
+            // Assert
+            Assert.IsNotNull(response.Result);
+            Assert.IsAssignableFrom<OkObjectResult>(response.Result);
+            var okObjectResult = response.Result as ObjectResult;
+
+            Assert.IsNotNull(okObjectResult);
+            Assert.AreEqual(200, okObjectResult.StatusCode);
+            // Assert.IsNull(okObjectResult.Value);
+            var deviceList = okObjectResult.Value as IEnumerable<Concentrator>;
+
+            Assert.IsNull(deviceList);
+            // Assert.IsFalse(deviceList.Any());
+
+            this.mockRepository.VerifyAll();
+        }
+    }
+}

src/AzureIoTHub.Portal/Server/Controllers/v1.0/LoRaWAN/LoRaWANConcentratorsController.cs

@@ -74,9 +74,16 @@ public async Task<ActionResult<IEnumerable<Concentrator>>> GetAllDeviceConcentra
             // Gets all the twins from this devices
             var items = await this.devicesService.GetAllDevice(filterDeviceType: "LoRa Concentrator");
 
-            var result = items.Select(this.concentratorTwinMapper.CreateDeviceDetails);
+            if (items.Any())
+            {
+                var result = items.Select(this.concentratorTwinMapper.CreateDeviceDetails);
 
-            return this.Ok(result);
+                return this.Ok(result);
+            }
+            else
+            {
+                return this.Ok(items);
+            }
         }
 
         /// <summary>