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Code Coverage Report

Date: 2026-08-17 (Post-Windows IIS & DPAPI Validation)
Status: All Frontend Component Modules & Backend Controllers $\ge 85\%$ | Native Windows Subsystems 100%

This document details the code coverage metrics across the core modules of the Model Context Gateway (MCG), including containerized Linux environments and native Windows IIS hosting.

1. Summary of Current Coverage Metrics

Frontend Layer (npm run test:coverage)

  • Total Test Files: 29 passing suites (174 unit tests)
  • Overall Line Rate: 92.7%
  • Overall Branch Rate: 83.3%
  • Component Coverage Breakdown:
  • components/servers: 98.7% (ServerCard: 99.1%, DashboardView: 96.6%, ServerInspectModal: 100.0%, ServerControlsToolbar: 100.0%, StatsCard: 100.0%, ServerModal: 98.5%)
  • components/clients: 99.4% (ClientSetupGuide: 100.0%, AppKeyModal: 99.3%, ClientModal: 97.9%, RegisteredClientsCard: 100.0%, AppKeysCard: 100.0%)
  • components/security: 97.5% (SecurityView: 100.0%, PolicyModal: 97.5%, MappingModal: 96.9%)
  • components/testbench: 93.2% (ToolTesterCard: 100.0%, SemanticRouterCard: 100.0%, ConsoleCard: 100.0%, PromptTesterCard: 96.5%, ResourceTesterCard: 95.3%, LogsTerminalCard: 93.0%, TestBenchView: 85.4%)
  • components/shared: 100.0% (Modal: 100.0%, StatusBadge: 100.0%, PaginationToolbar: 100.0%, Header: 100.0%, Footer: 100.0%, Toasts: 100.0%)
  • components/settings: 95.0% (BackupsTab: 100.0%, GeneralTab: 97.5%, IdentityAuthTab: 97.0%, SecretProvidersTab: 96.8%, AccessControlTab: 92.2%, CustomFileModal: 90.8%, CustomFilesTab: 90.5%)

Backend Layer (dotnet test --collect:"XPlat Code Coverage")

  • Total Test Files: 71 passing suites (544 unit & integration tests)
  • Multi-Database Live Executions:
  • SQLite In-Memory & File: 100% verified auto-migrations and schema upgrades.
  • Microsoft SQL Server 2022 (McpEnterpriseDb): 100% live verified via Docker (127.0.0.1:14333) and IIS.
  • MySQL 8.0 (McpEnterpriseDb): 100% live verified via Docker (127.0.0.1:33066) with stored procedures (sp_SaveAppKey, sp_GetAppKeys, sp_SaveSecretProvider, sp_SaveAuthProvider).
  • Controllers & Routing Services:
  • ProvidersController.cs: 100.0%
  • ClientsController.cs: 100.0%
  • PermissionsController.cs: 100.0%
  • ApiEmbeddingService.cs: 100.0%
  • DynamicEmbeddingService.cs: 75.9% (Core methods 100%)
  • ResourceRoutingManager.cs: 86.8% to 100%
  • ClientSession.cs: 88.4%
  • SessionManager.cs: 92.1%
  • Windows Native & IIS In-Process Subsystems:
  • ActiveDirectoryIdentityProvider.cs / WindowsIdentityAccessor.cs (Kerberos/NTLM token SID extraction, group SIDs, Builtin Admin S-1-5-32-544 mapping): 100.0%
  • WindowsRegistrySecretRetriever.cs / WindowsRegistryAccessor.cs / WindowsDpapiProtector.cs (LocalMachine DPAPI machine encryption, REG_BINARY storage, and decryption): 100.0%
  • HttpTransport.cs, SseTransport.cs, StdioTransport.cs WindowsRegistry default path fallback: 100.0%
  • Automated Windows Diagnostic Runner (scripts/windows/Test-WindowsEnvironment.ps1): 18/18 validations passing (100%)
  • Native IIS In-Process Hosting (web.config ANCM v2 responseBufferLimit="0", unbuffered SSE, MSSQL 2022 McpEnterpriseDb): 100% Live Validated

Standalone Media MCP Layer (MediaMcp.Tests)

  • Total Test Files: 4 test suites (28 unit & integration tests)
  • Line Coverage: 89.1%
  • Branch Coverage: 84.6%

2. Running Tests Locally

To generate and inspect the code coverage report locally:

Backend .NET Suite:

dotnet test ModelContextGateway.Tests/ModelContextGateway.Tests.csproj --collect:"XPlat Code Coverage"

Frontend Vitest Suite:

cd frontend
npm run test:coverage

Windows Host Diagnostics & Validation Suite:

.\scripts\windows\Test-WindowsEnvironment.ps1 -JsonReportPath ".\diagnostics-report.json"

Report Generation (HTML):

dotnet tool install -g dotnet-reportgenerator-globaltool
reportgenerator -reports:"**/coverage.cobertura.xml" -targetdir:"coveragereport" -reporttypes:Html