pypict Test Case Generator (Claude Skill) — Installieren & Live-Demo

Warum nutzen

Hauptfunktionen

Pairwise/N-wise test generation
Constraint syntax (IF/THEN parameter rules)
Translates plain-English parameter descriptions into pict models
Outputs test cases as a table or as test code skeletons
Works with pytest, JUnit, etc.

Live-Demo

In der Praxis

pypict-claude-skill.replay ▶ bereit

0/0

Installieren

Wählen Sie Ihren Client

~/Library/Application Support/Claude/claude_desktop_config.json · Windows: %APPDATA%\Claude\claude_desktop_config.json

{
  "mcpServers": {
    "pypict-claude-skill": {
      "command": "git",
      "args": [
        "clone",
        "https://github.com/omkamal/pypict-claude-skill",
        "~/.claude/skills/pypict-claude-skill"
      ],
      "_inferred": true
    }
  }
}

Öffne Claude Desktop → Settings → Developer → Edit Config. Nach dem Speichern neu starten.

~/.cursor/mcp.json · .cursor/mcp.json

{
  "mcpServers": {
    "pypict-claude-skill": {
      "command": "git",
      "args": [
        "clone",
        "https://github.com/omkamal/pypict-claude-skill",
        "~/.claude/skills/pypict-claude-skill"
      ],
      "_inferred": true
    }
  }
}

Cursor nutzt das gleiche mcpServers-Schema wie Claude Desktop. Projektkonfiguration schlägt die globale.

VS Code → Cline → MCP Servers → Edit

{
  "mcpServers": {
    "pypict-claude-skill": {
      "command": "git",
      "args": [
        "clone",
        "https://github.com/omkamal/pypict-claude-skill",
        "~/.claude/skills/pypict-claude-skill"
      ],
      "_inferred": true
    }
  }
}

Klicken Sie auf das MCP-Servers-Symbol in der Cline-Seitenleiste, dann "Edit Configuration".

~/.codeium/windsurf/mcp_config.json

{
  "mcpServers": {
    "pypict-claude-skill": {
      "command": "git",
      "args": [
        "clone",
        "https://github.com/omkamal/pypict-claude-skill",
        "~/.claude/skills/pypict-claude-skill"
      ],
      "_inferred": true
    }
  }
}

Gleiche Struktur wie Claude Desktop. Windsurf neu starten zum Übernehmen.

~/.continue/config.json

{
  "mcpServers": [
    {
      "name": "pypict-claude-skill",
      "command": "git",
      "args": [
        "clone",
        "https://github.com/omkamal/pypict-claude-skill",
        "~/.claude/skills/pypict-claude-skill"
      ]
    }
  ]
}

Continue nutzt ein Array von Serverobjekten statt einer Map.

~/.config/zed/settings.json

{
  "context_servers": {
    "pypict-claude-skill": {
      "command": {
        "path": "git",
        "args": [
          "clone",
          "https://github.com/omkamal/pypict-claude-skill",
          "~/.claude/skills/pypict-claude-skill"
        ]
      }
    }
  }
}

In context_servers hinzufügen. Zed lädt beim Speichern neu.

claude mcp add pypict-claude-skill -- git clone https://github.com/omkamal/pypict-claude-skill ~/.claude/skills/pypict-claude-skill

Einzeiler. Prüfen mit claude mcp list. Entfernen mit claude mcp remove.

Anwendungsfälle

Praxisnahe Nutzung: pypict Test Case Generator

Cover a feature with combinatorial inputs without writing 64 tests

👤 QA + devs writing integration tests ⏱ ~15 min intermediate

Wann einsetzen: Feature has 4+ enum-ish parameters and exhaustive testing would explode.

Voraussetzungen

Server/skill installed and authenticated — See repo README

Ablauf

Model

Use pypict skill: model checkout with payment_method=[card, paypal, applepay], shipping=[standard, express, intl], discount=[none, code, member], currency=[USD, EUR].✓ Kopiert

→ Pict model + ~12 pairwise cases
Generate tests

Emit pytest tests from those cases against checkout().✓ Kopiert

→ pytest file with parametrize

Ergebnis: Real combinatorial coverage with ~12 cases instead of 81.

Fallstricke

Pairwise misses higher-order bugs (3-way interactions). For safety-critical paths, use 3-wise. — Pairwise misses higher-order bugs (3-way interactions). For safety-critical paths, use 3-wise.

Kosten & Limits

Was der Betrieb kostet

API-Kontingent: See provider docs for rate limits
Tokens pro Aufruf: Varies by tool
Kosten in €: See repo README for pricing details
Tipp: Cache tool results and avoid repeated identical calls.

Sicherheit

Rechte, Secrets, Reichweite

Credential-Speicherung: Use environment variables; never commit secrets

Datenabfluss: Tool calls go to the provider's API as documented

Fehlerbehebung

Häufige Fehler und Lösungen

pict binary not found

Install Microsoft's pict tool (or pypict bundles it). See pypict README.

Prüfen: pypict.exec_pict('test')

constraints rejected

pict constraint syntax is strict: IF [A] = "x" THEN [B] <> "y";. Use the skill's validator.

Prüfen: Run validator first

Alternativen

pypict Test Case Generator vs. andere

Alternative	Wann stattdessen	Kompromiss
Plain parametrize	Few parameters	No combinatorial benefit

Mehr

Ressourcen

📖 Offizielle README auf GitHub lesen

🐙 Offene Issues ansehen

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