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pi_mcps/.roo/skills-mcp-builder/mcp-test-suite/SKILL.md
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pplate 87e0b9359e feat(roo): add Patrick-persona custom modes, skills, and mode-specific rules
Add 4 new custom modes with BigMind guidance:
- rules-bigmind/: Introspective Patrick mode (BigMind development)
- rules-homelab/: Tinkerer Patrick mode (TrueNAS, Docker, infra)
- rules-mcp-builder/: Craftsman Patrick mode (pi_mcps MCP servers)
- rules-paisy/: Professional Patrick mode (ADP Germany payroll)

Add reusable skills:
- skills/assessment-first/: structured assessment.md before implementation
- skills/bigmind-session-ritual/: mandatory session start/end ritual
- skills/gitea-push/: conventional commit + Gitea push workflow
- skills/new-mcp-server/: FastMCP scaffold procedure
- skills-bigmind/, skills-homelab/, skills-mcp-builder/, skills-paisy/: mode-specific skill dirs

Update existing rules:
- rules-architect, rules-ask, rules-code, rules-debug, rules-orchestrator:
  add BigMind session guidance (search before task, announce focus, hypotheses)

Add plans/MODES_AND_SKILLS_PLAN.md: full architecture document
2026-04-04 09:52:08 +02:00

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---
name: mcp-test-suite
description: Generates a comprehensive mock-based pytest test suite for a FastMCP server in pi_mcps. Use this skill when adding test coverage to a new or existing MCP server — produces conftest.py and test_server.py with 100% tool coverage and proper mock isolation.
---
# MCP Test Suite
## When to use
- New MCP server needs a test suite
- Existing server has missing coverage
- Adding new tools to an existing server
## When NOT to use
- Non-MCP Python code (use standard pytest patterns)
- Integration tests that actually hit external APIs (mock instead)
## Inputs required
- **Server name** — `mcp-{name}`
- **Tool list** — each tool's name, parameters, and return type
- **External dependencies** — HTTP clients, SDKs, env vars
## Workflow
### Step 1 — Write `tests/conftest.py`
```python
import sys
from pathlib import Path
import pytest
# Make src/ importable
sys.path.insert(0, str(Path(__file__).parent.parent / "src"))
@pytest.fixture
def mock_env(monkeypatch):
"""Set required environment variables."""
monkeypatch.setenv("API_KEY", "test-key")
monkeypatch.setenv("API_URL", "https://test.example.com")
```
### Step 2 — Write `tests/test_server.py`
Structure per tool:
```python
import pytest
from unittest.mock import patch, MagicMock
from server import tool_name # import directly from server module
class TestToolName:
def test_happy_path(self, mock_env):
with patch("server.httpx.get") as mock_get:
mock_get.return_value = MagicMock(
status_code=200,
json=lambda: {"key": "value"}
)
result = tool_name("test-param")
assert "expected" in result
def test_error_handling(self, mock_env):
with patch("server.httpx.get") as mock_get:
mock_get.side_effect = Exception("Connection refused")
result = tool_name("test-param")
assert "error" in result.lower()
def test_empty_input(self, mock_env):
# edge case — empty string, None, etc.
result = tool_name("")
assert result is not None
```
### Step 3 — Coverage checklist
For each tool, cover:
- [ ] Happy path with expected response
- [ ] Network/API error (exception raised)
- [ ] Empty or invalid input
- [ ] Edge case specific to the tool's logic
### Step 4 — Run and verify
```bash
cd mcp/{name}
uv run pytest tests/ -v --tb=short
```
Expected: all tests pass, no warnings about missing coverage
### Step 5 — Store result in BigMind
```
memory_store_fact("codebase", "mcp-{name} test suite: N tests, all passing. Coverage: happy path + error + edge cases per tool.")
```
## Troubleshooting
- **ImportError on `from server import ...`:** Check `conftest.py` sys.path insert
- **Mock not intercepting:** Patch the name as used in server.py, not the library's own namespace
-`patch("server.httpx.get")` — patches where it's used
-`patch("httpx.get")` — patches library origin (may not intercept)
- **Env var not set in test:** Add to `mock_env` fixture in conftest.py