🎃 #HackTober - add tests for bitcoin prices 🎃

Interfaces/IWebClient.cs

@@ -0,0 +1,21 @@
+using System;
+using System.Collections.Generic;
+using System.Text;
+
+namespace UtilityBelt.Interfaces
+{
+  public interface IWebClient : IDisposable
+  {
+    // Required methods (subset of `System.Net.WebClient` methods).
+    byte[] DownloadData(Uri address);
+
+    byte[] UploadData(Uri address, byte[] data);
+
+    string DownloadString(string address);
+  }
+
+  public interface IWebClientFactory
+  {
+    IWebClient Create();
+  }
+}

Models/SystemWebClient.cs

@@ -0,0 +1,30 @@
+using System;
+using System.Collections.Generic;
+using System.Net;
+using System.Text;
+using UtilityBelt.Interfaces;
+
+namespace UtilityBelt.Models
+{
+  /// <summary>
+  /// System web client.
+  /// </summary>
+  public class SystemWebClient : WebClient, IWebClient
+  {
+  }
+
+  /// <summary>
+  /// System web client factory.
+  /// </summary>
+  public class SystemWebClientFactory : IWebClientFactory
+  {
+    #region IWebClientFactory implementation
+
+    public IWebClient Create()
+    {
+      return new SystemWebClient();
+    }
+
+    #endregion IWebClientFactory implementation
+  }
+}

Tests/UtilityBeltxUnitTests/BitcoinPricesTests.cs

@@ -0,0 +1,77 @@
+using Microsoft.VisualStudio.TestTools.UnitTesting;
+using Moq;
+using System;
+using System.Net;
+using System.Text.Json;
+using UtilityBelt;
+using UtilityBelt.Interfaces;
+using UtilityBelt.Models;
+using UtilityBelt.Utilities;
+using Xunit;
+
+namespace UtilityBeltxUnitTests
+{
+  public class BitCoinPricesTests
+  {
+    private readonly Mock<IWebClient> webClient = new Mock<IWebClient>();
+
+    public BitCoinPricesTests()
+    {
+      var mockBitCoinResult = getBitCoinPrice();
+      var jsonresult = JsonSerializer.Serialize(mockBitCoinResult);
+      this.webClient.Setup(x => x.DownloadString(It.IsAny<string>())).Returns(jsonresult);
+    }
+
+    [Fact]
+    public void BitCoinPricesReturnsPrice()
+    {
+      var bitCoinClient = new TestableBitcoinPrices(webClient.Object);
+      bitCoinClient.Run();
+      this.webClient.Verify(x => x.DownloadString(It.IsAny<string>()), Times.Once);
+    }
+
+    [Fact]
+    public void BitCoinPricesDoesNotThrowsIfNoResult()
+    {
+      this.webClient.Setup(x => x.DownloadString(It.IsAny<string>())).Returns("");
+
+      var bitCoinClient = new TestableBitcoinPrices(webClient.Object);
+      bitCoinClient.Run();
+      this.webClient.Verify(x => x.DownloadString(It.IsAny<string>()), Times.Once);
+    }
+
+    private BitcoinPrice getBitCoinPrice()
+    {
+      var mockBitCoinTime = new BitcoinTime();
+      mockBitCoinTime.Updated = "Just now";
+
+      var mockbitCoinBpi = new BitcoinBpi()
+      {
+        USD = new Currency()
+        {
+          Rate = "1000"
+        }
+      };
+
+      var mockBitCoinPrice = new BitcoinPrice
+      {
+        Bpi = mockbitCoinBpi,
+        Time = mockBitCoinTime
+      };
+
+      return mockBitCoinPrice;
+    }
+
+    private class TestableBitcoinPrices : BitcoinPrices
+    {
+      public IWebClient webClient { get; set; }
+
+      public TestableBitcoinPrices(IWebClient webClient) : base()
+      {
+        this.webClient = webClient;
+      }
+
+      protected override IWebClient GetWebClient() => this.webClient;
+    }
+  }
+}

Tests/UtilityBeltxUnitTests/UtilityBeltxUnitTests.csproj

@@ -11,6 +11,7 @@
     <PackageReference Include="AutoFixture.AutoMoq" Version="4.14.0" />
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="16.7.1" />
     <PackageReference Include="Moq" Version="4.14.6" />
+    <PackageReference Include="MSTest.TestFramework" Version="2.1.2" />
     <PackageReference Include="xunit" Version="2.4.1" />
     <PackageReference Include="xunit.runner.visualstudio" Version="2.4.3">
       <PrivateAssets>all</PrivateAssets>

Utilities/BitcoinPrices.cs

@@ -2,15 +2,17 @@
 using System;
 using System.Collections.Generic;
 using System.Composition;
+using System.Linq.Expressions;
 using System.Net;
 using System.Text;
 using System.Text.Json;
+using UtilityBelt.Interfaces;
 using UtilityBelt.Models;
 
 namespace UtilityBelt.Utilities
 {
   [Export(typeof(IUtility))]
-  internal class BitcoinPrices : IUtility
+  public class BitcoinPrices : IUtility
   {
     public IList<string> Commands => new List<string> { "bitcoin", "bitcoin price" };
 
@@ -24,16 +26,29 @@ public void Run()
     {
       string content = string.Empty;
       string bitUrl = "https://api.coindesk.com/v1/bpi/currentprice.json";
-      using (var wc = new WebClient())
+      BitcoinPrice bitFact = new BitcoinPrice();
+      using (var wc = GetWebClient())
       {
         content = wc.DownloadString(bitUrl);
       }
-      BitcoinPrice bitFact = JsonSerializer.Deserialize<BitcoinPrice>(content);
-      Console.WriteLine();
+      try { 
+        bitFact = JsonSerializer.Deserialize<BitcoinPrice>(content);
+      }
+      catch{
+        Console.WriteLine("Got no result or couldn't convert to bitcoin pricing");
+      }
+
       Console.ForegroundColor = ConsoleColor.Yellow;
-      Console.WriteLine("As Of - " + bitFact.Time.Updated);
-      Console.WriteLine("USD - $ " + bitFact.Bpi.USD.Rate);
+      Console.WriteLine(bitFact?.Disclaimer);
+      Console.WriteLine("As Of - " + bitFact?.Time?.Updated);
+      Console.WriteLine("USD - $ " + bitFact?.Bpi?.USD?.Rate);
       Console.WriteLine();
     }
+
+    protected virtual IWebClient GetWebClient()
+    {
+      var factory = new SystemWebClientFactory();
+      return factory.Create();
+    }
   }
 }