Replace the hardcoded if/elif in Export.exec() with a dict registry.
Built-in formats (text, json, junit, html) are registered as lazy
loaders; missing optional deps (junit_xml, lxml) print a clear message
with a pip install hint instead of raising. Entry-points
(group "testium.exporters") are discovered at import time — installed
plugins are auto-detected with no extra config.
An unknown or unavailable format prints an info line and skips the
export; the test run is not interrupted.
Validation:
- New testium-fake-exporter package under test/validation/fake_exporter/
installed automatically by scripts/build_env.sh on venv creation.
It registers fake_format via entry-points and exports the tests
table to CSV — a real, useful exporter that exercises the plugin
contract end-to-end (entry-point discovery, dispatch, SQLite query).
- New dedicated items/report_plugin/ test exercises both the
unknown-format skip path and the fake_format plugin path, with a
py_func check (file_check.py) on the produced CSV. Runs once per
validation suite.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
