Created random generator

Author: mwhelan

.gitignore

@@ -9,4 +9,6 @@ _ReSharper.*
 *~
 *.log
 packages
-*.DotSettings
+*.DotSettings
+*.ncrunchproject
+*.ncrunchsolution

NTestDataBuilder.Tests/DataSources/Generators/RandomGeneratorTests.cs

@@ -0,0 +1,41 @@
+using System;
+using NTestDataBuilder.DataSources.Generators;
+using Shouldly;
+using Xunit;
+using Xunit.Extensions;
+
+namespace NTestDataBuilder.Tests.DataSources.Generators
+{
+    public class RandomGeneratorTests
+    {
+        [Fact]
+        public void WhenGeneratingRandomIntegers_ThenShouldAlwaysGenerateIntegerBetweenMinAndMaxValue()
+        {
+            var random = new Random();
+            for (int i = 0; i < 10; i++)
+            {
+                int minimumValue = random.Next(0,10);
+                int maximumValue = random.Next(20,30);
+                var sut = new RandomGenerator(minimumValue, maximumValue);
+
+                var result = sut.Generate();
+
+                result.ShouldBeGreaterThanOrEqualTo(minimumValue);
+                result.ShouldBeLessThanOrEqualTo(maximumValue);
+            }
+        }
+
+        [Theory,
+        InlineData(0,0),
+        InlineData(0,-1),
+        InlineData(-1,-2),
+        InlineData(5,4),
+        InlineData(5,5)]
+        public void WhenCreatingRandomGenerator_minimumValueMustBeLessThanMaximumValue(int minValue, int maxValue)
+        {
+            Action factory = () => new RandomGenerator(minValue, maxValue);
+            Should.Throw<ArgumentException>(factory)
+                .Message.ShouldBe(string.Format("minValue must be less than maxValue"));
+        }
+    }
+}

NTestDataBuilder.Tests/NTestDataBuilder.Tests.csproj

@@ -47,8 +47,12 @@
     <Reference Include="xunit">
       <HintPath>..\packages\xunit.1.9.2\lib\net20\xunit.dll</HintPath>
     </Reference>
+    <Reference Include="xunit.extensions">
+      <HintPath>..\packages\xunit.extensions.1.9.2\lib\net20\xunit.extensions.dll</HintPath>
+    </Reference>
   </ItemGroup>
   <ItemGroup>
+    <Compile Include="DataSources\Generators\RandomGeneratorTests.cs" />
     <Compile Include="EquivalenceClasses\StringEquivalenceClassesTests.cs" />
     <Compile Include="AsProxyTests.cs" />
     <Compile Include="BuildListTests.cs" />

NTestDataBuilder.Tests/packages.config

@@ -4,4 +4,5 @@
   <package id="NSubstitute" version="1.7.2.0" targetFramework="net40" />
   <package id="Shouldly" version="2.2.0" targetFramework="net40" />
   <package id="xunit" version="1.9.2" targetFramework="net40" />
+  <package id="xunit.extensions" version="1.9.2" targetFramework="net40" />
 </packages>

NTestDataBuilder/DataSources/Generators/IGenerator.cs

@@ -0,0 +1,7 @@
+namespace NTestDataBuilder.DataSources.Generators
+{
+    public interface IGenerator
+    {
+        int Generate();
+    }
+}

NTestDataBuilder/DataSources/Generators/RandomGenerator.cs

@@ -0,0 +1,27 @@
+using System;
+
+namespace NTestDataBuilder.DataSources.Generators
+{
+    public class RandomGenerator : IGenerator
+    {
+        private readonly Random _random;
+        private readonly int _minValue;
+        private readonly int _maxValue;
+
+        public RandomGenerator(int minValue, int maxValue)
+        {
+            if (minValue >= maxValue)
+            {
+                throw new ArgumentException("minValue must be less than maxValue");
+            }
+            _minValue = minValue;
+            _maxValue = maxValue;
+            _random = new Random();
+        }
+
+        public int Generate()
+        {
+            return _random.Next(_minValue, _maxValue);
+        }
+    }
+}

NTestDataBuilder/NTestDataBuilder.csproj

@@ -52,6 +52,9 @@
   </ItemGroup>
   <ItemGroup>
     <Compile Include="AnonymousValueFixture.cs" />
+    <Compile Include="DataSources\Generators\IGenerator.cs" />
+    <Compile Include="DataSources\Generators\RandomGenerator.cs" />
+    <Compile Include="DataSources\Generators\SequentialGenerator.cs" />
     <Compile Include="EquivalenceClasses\StringEquivalenceClasses.cs" />
     <Compile Include="IAnonymousValueSupplier.cs" />
     <Compile Include="Lists\ListBuilder.cs" />
@@ -68,6 +71,7 @@
     <None Include="NTestDataBuilder.nuspec" />
     <None Include="packages.config" />
   </ItemGroup>
+  <ItemGroup />
   <Import Project="$(MSBuildToolsPath)\Microsoft.CSharp.targets" />
   <!-- To modify your build process, add your task inside one of the targets below and uncomment it. 
        Other similar extension points exist, see Microsoft.Common.targets.