Rename task

Author: ErikSchierboom

.gitignore

@@ -4,3 +4,5 @@
 
 bin/
 obj/
+
+*.DotSettings.user

src/Exercism.Tests/Class1.cs

@@ -0,0 +1,17 @@
+using System;
+
+namespace Exercism.Tests
+{
+    [AttributeUsage(AttributeTargets.Method, AllowMultiple = true, Inherited = false)]
+    public class TaskAttribute : Attribute
+    {
+        public int Number { get; }
+
+        public TaskAttribute(int number)
+        {
+            if (number <= 0) throw new ArgumentOutOfRangeException(nameof(number), number, "Number must be greater than zero");
+            
+            Number = number;
+        }
+    }
+}

src/Exercism.Tests/TaskAttribute.cs

@@ -19,4 +19,8 @@
     </PackageReference>
   </ItemGroup>
 
+  <ItemGroup>
+    <ProjectReference Include="..\..\src\Exercism.Tests\Exercism.Tests.csproj" />
+  </ItemGroup>
+
 </Project>

tests/Exercism.Tests.Tests/Exercism.Tests.Tests.csproj

@@ -0,0 +1,38 @@
+using System;
+using Xunit;
+
+namespace Exercism.Tests.Tests
+{
+    public class TaskAttributeTests
+    {
+        [Fact]
+        public void AllowsOneDeclaration()
+        {
+            [Task(1)]
+            string TestMethod() => "One";
+        }
+        
+        [Fact]
+        public void AllowsMultipleDeclarations()
+        {
+            [Task(1), Task(2), Task(3)]
+            string TestMethod() => "One, Two, Three";
+        }
+        
+        [Fact]
+        public void ThrowsArgumentOutOfRangeExceptionWhenNumberIsZero()
+        {
+            Assert.Throws<ArgumentOutOfRangeException>(() => new TaskAttribute(0));
+        }
+        
+        [Theory]
+        [InlineData(-1)]
+        [InlineData(-2)]
+        [InlineData(-82)]
+        [InlineData(-123_832_991)]
+        public void ThrowsArgumentOutOfRangeExceptionWhenNumberIsNegative(int number)
+        {
+            Assert.Throws<ArgumentOutOfRangeException>(() => new TaskAttribute(number));
+        }
+    }
+}