Add test and codecov support to nuke build and CI workflow

Co-authored-by: ScarletKuro <19953225+ScarletKuro@users.noreply.github.com>

Author: Copilot

.github/workflows/continuous.yml

@@ -23,7 +23,7 @@ jobs:
     name: ubuntu-latest
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
         with:
           fetch-depth: 0
       - name: 'Cache: .nuke/temp, ~/.nuget/packages'
@@ -33,10 +33,21 @@ jobs:
             .nuke/temp
             ~/.nuget/packages
           key: ${{ runner.os }}-${{ hashFiles('**/global.json', '**/*.csproj', '**/Directory.Packages.props') }}
-      - name: 'Run: Compile, Pack'
-        run: ./build.cmd Compile Pack
+      - name: 'Run: Compile, Test, Pack'
+        run: ./build.cmd Compile Test Pack
+      - name: 'Upload coverage to Codecov'
+        uses: codecov/codecov-action@v5
+        with:
+          token: ${{ secrets.CODECOV_TOKEN }}
+          files: artifacts/coverage/*.xml
+          fail_ci_if_error: false
+      - name: 'Publish: coverage'
+        uses: actions/upload-artifact@v5
+        with:
+          name: coverage
+          path: artifacts/coverage
       - name: 'Publish: packages'
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@v5
         with:
           name: packages
           path: artifacts/packages

build/Build.cs

@@ -8,6 +8,7 @@
 using Nuke.Common.IO;
 using Nuke.Common.ProjectModel;
 using Nuke.Common.Tooling;
+using Nuke.Common.Tools.Coverlet;
 using Nuke.Common.Tools.DotNet;
 using Nuke.Common.Tools.GitHub;
 using Nuke.Common.Utilities.Collections;
@@ -22,7 +23,7 @@
     FetchDepth = 0,
     On = [GitHubActionsTrigger.Push],
     PublishArtifacts = true,
-    InvokedTargets = [nameof(Compile), nameof(Pack)])]
+    InvokedTargets = [nameof(Compile), nameof(Test), nameof(Pack)])]
 [GitHubActions(
     "release",
     GitHubActionsImage.UbuntuLatest,
@@ -59,6 +60,7 @@ class Build : NukeBuild
     AbsolutePath TestsDirectory => RootDirectory / "tests";
     AbsolutePath ArtifactsDirectory => RootDirectory / "artifacts";
     AbsolutePath PackagesDirectory => ArtifactsDirectory / "packages";
+    AbsolutePath CoverageDirectory => ArtifactsDirectory / "coverage";
 
     Target Clean => _ => _
             .Before(Restore)
@@ -104,16 +106,22 @@ class Build : NukeBuild
 
     Target Test => _ => _
         .DependsOn(Compile)
+        .Produces(CoverageDirectory / "*.xml")
         .Executes(() =>
         {
             var projects = Solution.GetAllProjects("*.Tests");
 
+            CoverageDirectory.CreateOrCleanDirectory();
+
             foreach (var project in projects)
             {
                 DotNetTest(_ => _
                     .SetProjectFile(project.Path)
                     .SetConfiguration(Configuration)
                     .EnableNoBuild()
+                    .EnableCollectCoverage()
+                    .SetCoverletOutputFormat(CoverletOutputFormat.cobertura)
+                    .SetCoverletOutput(CoverageDirectory / $"{project.Name}.xml")
                 );
             }
         });

src/Scarlet.System.Text.Json.DateTimeConverter.Tests/Scarlet.System.Text.Json.DateTimeConverter.Tests.csproj

@@ -14,6 +14,10 @@
       <PrivateAssets>all</PrivateAssets>
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
     </PackageReference>
+    <PackageReference Include="coverlet.msbuild" Version="6.0.4">
+      <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
+      <PrivateAssets>all</PrivateAssets>
+    </PackageReference>
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="18.0.1" />
     <PackageReference Include="xunit" Version="2.9.3" />
     <PackageReference Include="xunit.runner.visualstudio" Version="3.1.5">