Add basic test

RhSolutions.AddIn/RhSolutions.AddIn.csproj

@@ -13,10 +13,11 @@
   </PropertyGroup>
   <ItemGroup>
     <PackageReference Include="ExcelDna.AddIn" Version="1.6.0" />
+    <PackageReference Include="ExcelDna.Integration" Version="1.6.0" />
     <PackageReference Include="ExcelDna.IntelliSense" Version="1.6.0" />
-    <PackageReference Include="ExcelDna.Interop" Version="15.0.0" />
+    <PackageReference Include="ExcelDna.Interop" Version="15.0.1" />
     <PackageReference Include="Microsoft.CSharp" Version="4.7.0" />
-    <PackageReference Include="Newtonsoft.Json" Version="13.0.2" />
+    <PackageReference Include="Newtonsoft.Json" Version="13.0.3" />
     <PackageReference Include="RhSolutions.Sku" Version="0.1.1" />
     <PackageReference Include="System.Net.Http" Version="4.3.4" />
   </ItemGroup>

RhSolutions.Tests/RhSolutions.Tests.csproj

@@ -0,0 +1,14 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <TargetFramework>net6.0-windows</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+    <OutputType>Library</OutputType>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="ExcelDna.Testing" Version="1.6.0" />
+  </ItemGroup>
+
+</Project>

RhSolutions.Tests/Tests.cs

@@ -0,0 +1,38 @@
+namespace RhSolutions.Tests
+{
+    [ExcelTestSettings(AddIn = @"..\..\..\..\RhSolutions.AddIn\bin\Debug\net6.0-windows\RhSolutions-AddIn")]
+    public class CalculationTests : IDisposable
+    {
+        Workbook _testWorkbook;
+
+        public CalculationTests()
+        {
+            // Get hold of the Excel Application object and create a workbook
+            _testWorkbook = Util.Application.Workbooks.Add();
+        }
+
+        public void Dispose()
+        {
+            // Clean up our workbook without saving changes
+            _testWorkbook.Close(SaveChanges: false);
+        }
+
+        [ExcelFact]
+        public void NumbersAddCorrectly()
+        {
+            // We'll just do our test on the first sheet
+            var ws = _testWorkbook.Sheets[1];
+
+            // Write two numbers to the active sheet, and a formula that adds them, together
+            ws.Range["A1"].Value = 2.0;
+            ws.Range["A2"].Value = 3.0;
+            ws.Range["A3"].Formula = "= A1 + A2";
+
+            // Read back the value from the cell with the formula
+            var result = ws.Range["A3"].Value;
+
+            // Check that we have the expected result
+            Assert.Equal(5.0, result);
+        }
+    }
+}

RhSolutions.Tests/Usings.cs

@@ -0,0 +1,3 @@
+global using Xunit;
+global using Microsoft.Office.Interop.Excel;
+global using ExcelDna.Testing;

RhSolutions.sln

@@ -3,7 +3,9 @@ Microsoft Visual Studio Solution File, Format Version 12.00
 # Visual Studio Version 17
 VisualStudioVersion = 17.0.32112.339
 MinimumVisualStudioVersion = 10.0.40219.1
-Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "RhSolutions", "src\RhSolutions.csproj", "{18A2FF67-0E46-4A86-B872-29F2B3F23ADF}"
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "RhSolutions.AddIn", "RhSolutions.AddIn\RhSolutions.AddIn.csproj", "{18A2FF67-0E46-4A86-B872-29F2B3F23ADF}"
+EndProject
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "RhSolutions.Tests", "RhSolutions.Tests\RhSolutions.Tests.csproj", "{6EECCDDB-741C-404A-874F-BB8656265162}"
 EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
@@ -15,6 +17,10 @@ Global
 		{18A2FF67-0E46-4A86-B872-29F2B3F23ADF}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{18A2FF67-0E46-4A86-B872-29F2B3F23ADF}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{18A2FF67-0E46-4A86-B872-29F2B3F23ADF}.Release|Any CPU.Build.0 = Release|Any CPU
+		{6EECCDDB-741C-404A-874F-BB8656265162}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{6EECCDDB-741C-404A-874F-BB8656265162}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{6EECCDDB-741C-404A-874F-BB8656265162}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{6EECCDDB-741C-404A-874F-BB8656265162}.Release|Any CPU.Build.0 = Release|Any CPU
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE