Add unit tests and code coverage for MCP Server

.github/workflows/dotnet-ci.yml

@@ -0,0 +1,73 @@
+name: .NET CI with Code Coverage
+
+on:
+  push:
+    branches: [ "main" ]
+  pull_request:
+    branches: [ "main" ]
+
+jobs:
+  build-and-test:
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      checks: write
+
+    steps:
+    - uses: actions/checkout@v4
+
+    - name: Setup .NET
+      uses: actions/setup-dotnet@v4
+      with:
+        dotnet-version: 9.0.x
+
+    - name: Restore dependencies
+      run: dotnet restore
+
+    - name: Build
+      run: dotnet build --no-restore --configuration Release
+
+    - name: Test
+      run: dotnet test --no-build --configuration Release --verbosity normal --collect:"XPlat Code Coverage" --results-directory ./TestResults
+
+    - name: Upload coverage reports to Codecov
+      uses: codecov/codecov-action@v5
+      with:
+        directory: ./TestResults
+        fail_ci_if_error: false
+        verbose: true
+      env:
+        CODECOV_TOKEN: ${{ secrets.CODECOV_TOKEN }}
+
+    - name: Generate Coverage Report
+      uses: danielpalme/ReportGenerator-GitHub-Action@5.4.2
+      with:
+        reports: 'TestResults/**/coverage.cobertura.xml'
+        targetdir: 'TestResults/CoverageReport'
+        reporttypes: 'Html;TextSummary;Cobertura;Badges'
+
+    - name: Display Coverage Summary
+      run: |
+        echo "## Code Coverage Summary" >> $GITHUB_STEP_SUMMARY
+        echo "" >> $GITHUB_STEP_SUMMARY
+        cat TestResults/CoverageReport/Summary.txt >> $GITHUB_STEP_SUMMARY
+
+    - name: Upload Coverage Report as Artifact
+      uses: actions/upload-artifact@v4
+      if: always()
+      with:
+        name: coverage-report
+        path: TestResults/CoverageReport
+        retention-days: 30
+
+    - name: Check Coverage Threshold
+      run: |
+        COVERAGE=$(grep -oP 'Line coverage: \K[0-9.]+' TestResults/CoverageReport/Summary.txt)
+        echo "Current coverage: $COVERAGE%"
+        THRESHOLD=70.0
+        if (( $(echo "$COVERAGE < $THRESHOLD" | bc -l) )); then
+          echo "❌ Coverage ($COVERAGE%) is below threshold ($THRESHOLD%)"
+          exit 1
+        else
+          echo "✅ Coverage ($COVERAGE%) meets threshold ($THRESHOLD%)"
+        fi

.gitignore

@@ -55,6 +55,9 @@ Generated\ Files/
 [Bb]uild[Ll]og.*
 *.trx
 
+# Code Coverage Results
+TestResults/
+
 # NUnit
 *.VisualState.xml
 TestResult.xml

AbeckDev.DbTimetable.Mcp.Test/AbeckDev.DbTimetable.Mcp.Test.csproj

@@ -0,0 +1,34 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <TargetFramework>net9.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+
+    <IsPackable>false</IsPackable>
+    <IsTestProject>true</IsTestProject>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="coverlet.collector" Version="6.0.4">
+      <PrivateAssets>all</PrivateAssets>
+      <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
+    </PackageReference>
+    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="18.0.0" />
+    <PackageReference Include="Moq" Version="4.20.72" />
+    <PackageReference Include="xunit" Version="2.9.3" />
+    <PackageReference Include="xunit.runner.visualstudio" Version="3.1.5">
+      <PrivateAssets>all</PrivateAssets>
+      <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
+    </PackageReference>
+  </ItemGroup>
+
+  <ItemGroup>
+    <Using Include="Xunit" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <ProjectReference Include="..\AbeckDev.DbTimetable.Mcp\AbeckDev.DbTimetable.Mcp.csproj" />
+  </ItemGroup>
+
+</Project>

AbeckDev.DbTimetable.Mcp.Test/ConfigurationTests.cs

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+using AbeckDev.DbTimetable.Mcp.Models;
+
+namespace AbeckDev.DbTimetable.Mcp.Test;
+
+public class ConfigurationTests
+{
+    [Fact]
+    public void Configuration_SectionName_HasCorrectValue()
+    {
+        // Arrange & Act & Assert
+        Assert.Equal("DeutscheBahnApi", Configuration.SectionName);
+    }
+
+    [Fact]
+    public void Configuration_DefaultValues_AreCorrect()
+    {
+        // Arrange & Act
+        var config = new Configuration();
+
+        // Assert
+        Assert.Equal("https://apis.deutschebahn.com/db-api-marketplace/apis/timetables/v1/", config.BaseUrl);
+        Assert.Equal(string.Empty, config.ClientId);
+        Assert.Equal(string.Empty, config.ApiKey);
+    }
+
+    [Fact]
+    public void Configuration_Properties_CanBeSet()
+    {
+        // Arrange
+        var config = new Configuration();
+        var expectedBaseUrl = "https://test.api.com/";
+        var expectedClientId = "test-client-id";
+        var expectedApiKey = "test-api-key";
+
+        // Act
+        config.BaseUrl = expectedBaseUrl;
+        config.ClientId = expectedClientId;
+        config.ApiKey = expectedApiKey;
+
+        // Assert
+        Assert.Equal(expectedBaseUrl, config.BaseUrl);
+        Assert.Equal(expectedClientId, config.ClientId);
+        Assert.Equal(expectedApiKey, config.ApiKey);
+    }
+}