Added unit tests for Guard,

Author: grokys

src/UnitTests/GitHub.Extensions/GuardTests.cs

@@ -0,0 +1,121 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using GitHub.Extensions;
+using Xunit;
+
+namespace UnitTests.GitHub.Extensions
+{
+    public class GuardTests
+    {
+        public class TheArgumentNotNullMethod : TestBaseClass
+        {
+            [Fact]
+            public void ShouldNotThrow()
+            {
+                Guard.ArgumentNotNull(new object(), "name");
+            }
+
+            [Fact]
+            public void ShouldThrow()
+            {
+                Assert.Throws<ArgumentNullException>(() => Guard.ArgumentNotNull(null, "name"));
+            }
+        }
+
+        public class TheArgumentNonNegativeMethod : TestBaseClass
+        {
+            [Fact]
+            public void ShouldNotThrowFor0()
+            {
+                Guard.ArgumentNonNegative(0, "name");
+            }
+
+            [Fact]
+            public void ShouldNotThrowFor1()
+            {
+                Guard.ArgumentNonNegative(1, "name");
+            }
+
+            [Fact]
+            public void ShouldThrowForMinus1()
+            {
+                Assert.Throws<ArgumentException>(() => Guard.ArgumentNonNegative(-1, "name"));
+            }
+        }
+
+        public class TheArgumentNotEmptyStringMethod : TestBaseClass
+        {
+            [Fact]
+            public void ShouldNotThrowForString()
+            {
+                Guard.ArgumentNotEmptyString("string", "name");
+            }
+
+            [Fact]
+            public void ShouldThrowForEmptyString()
+            {
+                Assert.Throws<ArgumentException>(() => Guard.ArgumentNotEmptyString("", "name"));
+            }
+
+            [Fact]
+            public void ShouldThrowForNull()
+            {
+                Assert.Throws<ArgumentException>(() => Guard.ArgumentNotEmptyString(null, "name"));
+            }
+        }
+
+        public class TheArgumentInRangeMethod : TestBaseClass
+        {
+            [Fact]
+            public void ShouldNotThrowForGreaterThanMinimum()
+            {
+                Guard.ArgumentInRange(12, 10, "name");
+            }
+
+            [Fact]
+            public void ShouldNotThrowForEqualToMinimumNoMaximum()
+            {
+                Guard.ArgumentInRange(10, 10, "name");
+            }
+
+            [Fact]
+            public void ShouldNotThrowForEqualToMinimumWithMaximum()
+            {
+                Guard.ArgumentInRange(10, 10, 20, "name");
+            }
+
+            [Fact]
+            public void ShouldNotThrowForEqualToMaximum()
+            {
+                Guard.ArgumentInRange(20, 10, 20, "name");
+            }
+
+            [Fact]
+            public void ShouldNotThrowForBetweenMinimumAndMaximum()
+            {
+                Guard.ArgumentInRange(12, 10, 20, "name");
+            }
+
+            [Fact]
+            public void ShouldThrowForLessThanMinimumNoMaximum()
+            {
+                Assert.Throws<ArgumentOutOfRangeException>(() => Guard.ArgumentInRange(2, 10, "name"));
+            }
+
+            [Fact]
+            public void ShouldThrowForLessThanMinimumWithMaximum()
+            {
+                Assert.Throws<ArgumentOutOfRangeException>(() => Guard.ArgumentInRange(2, 10, 20, "name"));
+            }
+
+            [Fact]
+            public void ShouldThrowForGreaterThanMaximum()
+            {
+                Assert.Throws<ArgumentOutOfRangeException>(() => Guard.ArgumentInRange(22, 10, 20, "name"));
+            }
+        }
+    }
+}

src/UnitTests/UnitTests.csproj

@@ -181,6 +181,7 @@
     <Compile Include="GitHub.Exports\GitServiceTests.cs" />
     <None Include="GitHub.Exports\VSServicesTests.cs" />
     <Compile Include="GitHub.Exports\SimpleRepositoryModelTests.cs" />
+    <Compile Include="GitHub.Extensions\GuardTests.cs" />
     <Compile Include="GitHub.Extensions\UriExtensionTests.cs" />
     <Compile Include="GitHub.Primitives\UriStringTests.cs" />
     <Compile Include="GitHub.UI\Converters.cs" />