Add HandleBars Random functionality (#230 #219)

Add HandleBars Random functionality (#219)

WireMock.Net Solution.sln.DotSettings

@@ -10,5 +10,6 @@
 	<s:String x:Key="/Default/CodeStyle/Naming/CSharpNaming/Abbreviations/=XUA/@EntryIndexedValue">XUA</s:String>
 	<s:Boolean x:Key="/Default/UserDictionary/Words/=funcs/@EntryIndexedValue">True</s:Boolean>
 	<s:Boolean x:Key="/Default/UserDictionary/Words/=Heyenrath/@EntryIndexedValue">True</s:Boolean>
+	<s:Boolean x:Key="/Default/UserDictionary/Words/=randomizer/@EntryIndexedValue">True</s:Boolean>
 	<s:Boolean x:Key="/Default/UserDictionary/Words/=Stef/@EntryIndexedValue">True</s:Boolean>
 </wpf:ResourceDictionary>

examples/WireMock.Net.Console.Net452.Classic/MainApp.cs

@@ -395,6 +395,13 @@ namespace WireMock.Net.ConsoleApplication
                     })
                 );
 
+            server
+                .Given(Request.Create().WithPath("/random"))
+                .RespondWith(Response.Create()
+                    .WithBody("Text:{{Random Type=\"Text\" Min=8 Max=20}}\r\nDateTime:{{Random Type=\"DateTime\"}}\r\nGuid:{{Random Type=\"Guid\" Uppercase=true}}")
+                    .WithTransformer()
+                );
+
             System.Console.WriteLine("Press any key to stop the server");
             System.Console.ReadKey();
             server.Stop();

src/WireMock.Net/Transformers/HandleBarsHelpers.cs

@@ -9,6 +9,8 @@
             HandleBarsJsonPath.Register();
 
             HandleBarsLinq.Register();
+
+            HandleBarsRandom.Register();
         }
     }
 }

src/WireMock.Net/Transformers/HandleBarsRandom.cs

@@ -0,0 +1,44 @@
+using System.Collections.Generic;
+using HandlebarsDotNet;
+using RandomDataGenerator.FieldOptions;
+using RandomDataGenerator.Randomizers;
+using WireMock.Validation;
+
+namespace WireMock.Transformers
+{
+    internal static class HandleBarsRandom
+    {
+        public static void Register()
+        {
+            Handlebars.RegisterHelper("Random", (writer, context, arguments) =>
+            {
+                var fieldOptions = GetFieldOptionsFromArguments(arguments);
+
+                dynamic randomizer = RandomizerFactory.GetRandomizerAsDynamic(fieldOptions);
+                if (randomizer.GetType().GetMethod("GenerateAsString") != null)
+                {
+                    string valueAsString = randomizer.GenerateAsString();
+                    writer.WriteSafeString(valueAsString);
+                }
+                else
+                {
+                    object valueAsObject = randomizer.Generate();
+                    writer.WriteSafeString(valueAsObject);
+                }
+            });
+        }
+
+        private static FieldOptionsAbstract GetFieldOptionsFromArguments(object[] arguments)
+        {
+            Check.Condition(arguments, args => args.Length > 0, nameof(arguments));
+            Check.NotNull(arguments[0], "arguments[0]");
+
+            var properties = (Dictionary<string, object>)arguments[0];
+            string type = (string)properties["Type"];
+
+            properties.Remove("Type");
+
+            return FieldOptionsFactory.GetFieldOptions(type, properties);
+        }
+    }
+}

src/WireMock.Net/WireMock.Net.csproj

@@ -53,6 +53,7 @@
     <PackageReference Include="RestEase" Version="1.4.7" />
     <PackageReference Include="MimeKitLite" Version="2.0.7" />
     <PackageReference Include="System.Linq.Dynamic.Core" Version="1.0.9" />
+    <PackageReference Include="RandomDataGenerator.Net" Version="1.0.1" />
   </ItemGroup>
 
   <ItemGroup Condition=" '$(TargetFramework)' == 'net451' ">

test/WireMock.Net.Tests/ResponseBuilders/ResponseWithHandlebarsRandomTests.cs

@@ -0,0 +1,35 @@
+using System.Threading.Tasks;
+using NFluent;
+using WireMock.Models;
+using WireMock.ResponseBuilders;
+using Xunit;
+
+namespace WireMock.Net.Tests.ResponseBuilders
+{
+    public class ResponseWithHandlebarsRandomTests
+    {
+        private const string ClientIp = "::1";
+
+        [Fact]
+        public async Task Response_ProvideResponseAsync_Handlebars_Random()
+        {
+            // Assign
+            var request = new RequestMessage(new UrlDetails("http://localhost:1234"), "GET", ClientIp);
+
+            var response = Response.Create()
+                .WithBodyAsJson(new
+                {
+                    Text = "{{Random Type=\"Text\" Min=8 Max=20}}",
+                    DateTime = "{{Random Type=\"DateTime\"}}",
+                    Guid = "{{Random Type=\"Guid\" Uppercase=true}}"
+                })
+                .WithTransformer();
+
+            // Act
+            var responseMessage = await response.ProvideResponseAsync(request);
+
+            // assert
+            Check.That(responseMessage.BodyData).IsNotNull();
+        }
+    }
+}

test/WireMock.Net.Tests/ResponseBuilders/ResponseWithHandlebarsRegexTests.cs

@@ -1,4 +1,5 @@
 using System;
+using System.Threading.Tasks;
 using NFluent;
 using WireMock.Models;
 using WireMock.ResponseBuilders;
@@ -12,7 +13,7 @@ namespace WireMock.Net.Tests.ResponseBuilders
         private const string ClientIp = "::1";
 
         [Fact]
-        public async void Response_ProvideResponse_Handlebars_RegexMatch()
+        public async Task Response_ProvideResponseAsync_Handlebars_RegexMatch()
         {
             // Assign
             var body = new BodyData { BodyAsString = "abc", DetectedBodyType = BodyType.String };
@@ -31,7 +32,7 @@ namespace WireMock.Net.Tests.ResponseBuilders
         }
 
         [Fact]
-        public async void Response_ProvideResponse_Handlebars_RegexMatch_NoMatch()
+        public async Task Response_ProvideResponseAsync_Handlebars_RegexMatch_NoMatch()
         {
             // Assign
             var body = new BodyData { BodyAsString = "abc", DetectedBodyType = BodyType.String };
@@ -50,7 +51,7 @@ namespace WireMock.Net.Tests.ResponseBuilders
         }
 
         [Fact]
-        public async void Response_ProvideResponse_Handlebars_RegexMatch_NoMatch_WithDefaultValue()
+        public async Task Response_ProvideResponseAsync_Handlebars_RegexMatch_NoMatch_WithDefaultValue()
         {
             // Assign
             var body = new BodyData { BodyAsString = "abc", DetectedBodyType = BodyType.String };
@@ -69,7 +70,7 @@ namespace WireMock.Net.Tests.ResponseBuilders
         }
 
         [Fact]
-        public async void Response_ProvideResponse_Handlebars_RegexMatch2()
+        public async Task Response_ProvideResponseAsync_Handlebars_RegexMatch2()
         {
             // Assign
             var body = new BodyData { BodyAsString = "https://localhost:5000/", DetectedBodyType = BodyType.String };
@@ -88,7 +89,7 @@ namespace WireMock.Net.Tests.ResponseBuilders
         }
 
         [Fact]
-        public async void Response_ProvideResponse_Handlebars_RegexMatch2_NoMatch()
+        public async Task Response_ProvideResponseAsync_Handlebars_RegexMatch2_NoMatch()
         {
             // Assign
             var body = new BodyData { BodyAsString = "{{\\test", DetectedBodyType = BodyType.String };
@@ -107,7 +108,7 @@ namespace WireMock.Net.Tests.ResponseBuilders
         }
 
         [Fact]
-        public async void Response_ProvideResponse_Handlebars_RegexMatch2_NoMatch_WithDefaultValue()
+        public async Task Response_ProvideResponseAsync_Handlebars_RegexMatch2_NoMatch_WithDefaultValue()
         {
             // Assign
             var body = new BodyData { BodyAsString = "{{\\test", DetectedBodyType = BodyType.String };
@@ -126,7 +127,7 @@ namespace WireMock.Net.Tests.ResponseBuilders
         }
 
         [Fact]
-        public void Response_ProvideResponse_Handlebars_RegexMatch2_Throws()
+        public void Response_ProvideResponseAsync_Handlebars_RegexMatch2_Throws()
         {
             // Assign
             var body = new BodyData { BodyAsString = "{{\\test", DetectedBodyType = BodyType.String };