# Gen Test

> Generate a pytest test following project conventions Use when this capability is needed.

- Skill: `tomevault-io/gen-test-3` (Agent Skill, multi-file: 2 files)
- Install (CLI): `npx skillmds@latest add tomevault-io/gen-test-3`
- Raw SKILL.md: https://api.skillmd.com/api/skills/tomevault-io/gen-test-3/raw
- Safety review: pending (external: skill-scanner PASS, skillspector PASS)
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Coding & Dev Tools
- Author: tomevault-io (https://skillmd.com/u/tomevault-io)
- Updated: 2026-09-17
- Page: https://skillmd.com/skills/tomevault-io/gen-test-3

---


# Generate Test

Create pytest tests following happy-simulator project conventions.

## Project Test Patterns

### Timing
- Use `ConstantArrivalTimeProvider` for deterministic timing in tests
- Use `Instant.from_seconds()` for time values
- Use `Instant.Epoch` for time zero, `Instant.Infinity` for auto-termination

### File Organization
- Unit tests go in `tests/unit/`
- Integration tests go in `tests/integration/`
- File naming: `test_<feature>.py`
- Function naming: `test_<scenario>()`

### Common Imports

```python
import pytest
from happysimulator import Simulation, Event, Instant
from happysimulator.load import Source, ConstantArrivalTimeProvider
```

### Example Test Structure

```python
def test_example_scenario():
    """Test description explaining what behavior is verified."""
    # Arrange
    sim = Simulation(end_time=Instant.from_seconds(10))

    # Act
    sim.run()

    # Assert
    assert expected_condition
```

## Instructions

1. Ask what functionality needs testing if not specified
2. Determine if this is a unit test or integration test
3. Generate test following the patterns above
4. Run the test with `pytest tests/<path> -q` to verify it passes

---
> Converted and distributed by [TomeVault](https://tomevault.io/claim/adamfilli) — claim your Tome and manage your conversions.
<!-- tomevault:4.0:skill_md:2026-04-11 -->