Add compatibility tests for UnitsNet.Serialization.JsonNet (#425)

* Create another test project to run UnitsNet JSON serialization tests on the latest UnitsNet libraries in Nuget

The new test project is `UnitsNet.Serialization.JsonNet.CompatibilityTests`.

UnitsNetJsonConverterTests.cs is added as a link.
`    <Compile Include="..\UnitsNet.Serialization.JsonNet.Tests\UnitsNetJsonConverterTests.cs" Link="UnitsNetJsonConverterTests.cs" />`

The project runs the serialization tests on the latest version of the UnitsNet.Serialization.JsonNet library in Nuget.

`<PackageReference Include="UnitsNet.Serialization.JsonNet" Version="*" />`

* Added xUnit DotNetCliToolReference

* Force compatibility tests to use branch's UnitsNet code

see #423 (comment)

Compatibility test must use JSON Nuget and branch's UnitsNet code

* Added compatibility tests project to Start-Tests script function

Author: gojanpaolo

Build/build-functions.psm1

@@ -58,7 +58,8 @@ function Start-Build([boolean] $skipUWP = $false) {
 function Start-Tests {
   $projectPaths = @(
     "UnitsNet.Tests\UnitsNet.Tests.NetCore.csproj",
-    "UnitsNet.Serialization.JsonNet.Tests\UnitsNet.Serialization.JsonNet.Tests.NetCore.csproj"
+    "UnitsNet.Serialization.JsonNet.Tests\UnitsNet.Serialization.JsonNet.Tests.NetCore.csproj",
+    "UnitsNet.Serialization.JsonNet.CompatibilityTests\UnitsNet.Serialization.JsonNet.CompatibilityTests.NetCore.csproj"
     )
 
   # Parent dir must exist before xunit tries to write files to it
@@ -121,4 +122,4 @@ function Compress-ArtifactsAsZip {
   write-host -foreground blue "Zip artifacts...END`n"
 }
 
-export-modulemember -function Start-NugetRestore, Remove-ArtifactsDir, Update-GeneratedCode, Start-Build, Start-SignedBuild, Start-Tests, Start-PackNugets, Compress-ArtifactsAsZip
+export-modulemember -function Start-NugetRestore, Remove-ArtifactsDir, Update-GeneratedCode, Start-Build, Start-SignedBuild, Start-Tests, Start-PackNugets, Compress-ArtifactsAsZip

UnitsNet.Serialization.JsonNet.CompatibilityTests/UnitsNet.Serialization.JsonNet.CompatibilityTests.csproj

@@ -0,0 +1,33 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <TargetFrameworks>netcoreapp1.1</TargetFrameworks>
+    <RootNamespace>UnitsNet.Serialization.JsonNet.CompatibilityTests</RootNamespace>
+    <OutputPath>..\Artifacts\$(MSBuildProjectName)</OutputPath>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <Compile Remove="obj\**" />
+    <EmbeddedResource Remove="obj\**" />
+    <None Remove="obj\**" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <Compile Include="..\UnitsNet.Serialization.JsonNet.Tests\UnitsNetJsonConverterTests.cs" Link="UnitsNetJsonConverterTests.cs" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <!--Get the latest released version of UnitsNet.Serialization.JsonNet in Nuget-->
+    <PackageReference Include="UnitsNet.Serialization.JsonNet" Version="*" />
+    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="15.3.0" />
+    <PackageReference Include="xunit" Version="2.3.0-beta4-build3742" />
+    <PackageReference Include="xunit.runner.visualstudio" Version="2.3.0-beta4-build3742" />
+		<DotNetCliToolReference Include="dotnet-xunit" Version="2.3.0-beta2-build3683" />
+  </ItemGroup>
+	
+	<ItemGroup>
+		<!--Reference the UnitsNet project to test the UnitsNet.Serialization.JsonNet Nuget with
+        the latest UnitsNet code to catch backwards compatibility issues. -->
+		<ProjectReference Include="..\UnitsNet\UnitsNet.NetStandard10.csproj" />
+	</ItemGroup>
+</Project>

UnitsNet.sln

@@ -15,6 +15,8 @@ Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "UnitsNet.Serialization.Json
 EndProject
 Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "UnitsNet.Tests", "UnitsNet.Tests\UnitsNet.Tests.csproj", "{0E3B7567-5DF2-44BD-88DB-CCF050D3F943}"
 EndProject
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "UnitsNet.Serialization.JsonNet.CompatibilityTests", "UnitsNet.Serialization.JsonNet.CompatibilityTests\UnitsNet.Serialization.JsonNet.CompatibilityTests.csproj", "{21F2FFAC-BF39-487F-9ADE-37100162F955}"
+EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|Any CPU = Debug|Any CPU
@@ -123,6 +125,22 @@ Global
 		{0E3B7567-5DF2-44BD-88DB-CCF050D3F943}.Release|x64.Build.0 = Release|Any CPU
 		{0E3B7567-5DF2-44BD-88DB-CCF050D3F943}.Release|x86.ActiveCfg = Release|Any CPU
 		{0E3B7567-5DF2-44BD-88DB-CCF050D3F943}.Release|x86.Build.0 = Release|Any CPU
+		{21F2FFAC-BF39-487F-9ADE-37100162F955}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{21F2FFAC-BF39-487F-9ADE-37100162F955}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{21F2FFAC-BF39-487F-9ADE-37100162F955}.Debug|ARM.ActiveCfg = Debug|Any CPU
+		{21F2FFAC-BF39-487F-9ADE-37100162F955}.Debug|ARM.Build.0 = Debug|Any CPU
+		{21F2FFAC-BF39-487F-9ADE-37100162F955}.Debug|x64.ActiveCfg = Debug|Any CPU
+		{21F2FFAC-BF39-487F-9ADE-37100162F955}.Debug|x64.Build.0 = Debug|Any CPU
+		{21F2FFAC-BF39-487F-9ADE-37100162F955}.Debug|x86.ActiveCfg = Debug|Any CPU
+		{21F2FFAC-BF39-487F-9ADE-37100162F955}.Debug|x86.Build.0 = Debug|Any CPU
+		{21F2FFAC-BF39-487F-9ADE-37100162F955}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{21F2FFAC-BF39-487F-9ADE-37100162F955}.Release|Any CPU.Build.0 = Release|Any CPU
+		{21F2FFAC-BF39-487F-9ADE-37100162F955}.Release|ARM.ActiveCfg = Release|Any CPU
+		{21F2FFAC-BF39-487F-9ADE-37100162F955}.Release|ARM.Build.0 = Release|Any CPU
+		{21F2FFAC-BF39-487F-9ADE-37100162F955}.Release|x64.ActiveCfg = Release|Any CPU
+		{21F2FFAC-BF39-487F-9ADE-37100162F955}.Release|x64.Build.0 = Release|Any CPU
+		{21F2FFAC-BF39-487F-9ADE-37100162F955}.Release|x86.ActiveCfg = Release|Any CPU
+		{21F2FFAC-BF39-487F-9ADE-37100162F955}.Release|x86.Build.0 = Release|Any CPU
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE