[dmccoystephenson]

Summary

• A characterization test, test_draw_text_leaves_the_surface_visible_around_the_glyphs, is added. It pins that drawText paints only the glyphs: the rest of the rendered text's rectangle keeps whatever was already on the surface.
• This behavior was previously unguarded. Every existing text test (including the drawButton label tests, whose ink filter excludes black) draws onto a black background, where rendering with an opaque black background looks identical. drawButton relies on the transparent background to show its label over colorBox.
• The test draws a . (which inks only the bottom of its line) onto a green surface and requires the top row of the centered text rectangle to stay green.
• No production code is changed.

Test plan

• python3 -m pytest -q → 64 passed (63 before).
• python3 -m py_compile src/main/python/preponderous/graphik/graphik.py succeeds.
• Sensitivity confirmed empirically: with drawText temporarily changed to myFont.render(text, True, color, (0, 0, 0)), only the new test fails (1 failed, 63 passed); with the change reverted, all 64 pass.

Triage notes (skipped issues)

This cycle was a Stage B (unit-test expansion) cycle, because every open issue is gated:

• release: publish.yml's wheel smoke test never imports Graphik, so a wheel missing graphik.py would still publish #46 and ci: test.yml's header comment claims it runs on every push, but pushes outside main are only covered via pull_request #39 need changes under .github/workflows/, which is excluded from autonomous change.
• release: version tags are pushed without the 'v' prefix publish.yml requires, so no release has ever been published #34 needs a maintainer to push a correctly-prefixed release tag.
• packaging: the empty preponderous/__init__.py ships a regular package, which will collide with any future preponderous.* distribution #40 depends on a maintainer decision about the preponderous.* namespace convention across sibling projects.

This PR description was drafted during a Gardener session (https://github.com/Stephenson-Software/gardener).

🤖 Generated with Claude Code

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drafted by Claude on behalf of Daniel Stephenson

[dmccoystephenson]

Self-review rubric (performed inline; no independent reviewer is configured — --add-reviewer Copilot failed to resolve):

• Scope: PASS — the diff touches only src/test/python/preponderous/graphik/test_graphik.py (+27 lines, one new test function); no production code, docs, or version files changed.
• Tests-new: PASS (n/a) — no new public method was added.
• Tests-fix (sensitivity, empirical): PASS — with drawText temporarily rendering with an opaque (0, 0, 0) background, the new test failed and the other 63 passed; with it reverted, 64 passed. The 63 passing confirms the behavior had no existing guard.
• Sibling structure: PASS — the test follows the neighboring drawText tests: it uses the _make_graphik/_rgb helpers, explains its rationale in a leading comment, and includes the "drawText left the surface untouched" sanity assertion.
• Sibling renames: PASS (n/a) — nothing was renamed.
• Docs: PASS — README and docstrings make no claim about the text background, so no doc row changes. Documenting the transparent background in the drawText docstring could be considered separately.
• Issue resolution: PASS (n/a) — no Closes reference. This is a Stage B cycle because every open issue (release: version tags are pushed without the 'v' prefix publish.yml requires, so no release has ever been published #34, ci: test.yml's header comment claims it runs on every push, but pushes outside main are only covered via pull_request #39, packaging: the empty preponderous/__init__.py ships a regular package, which will collide with any future preponderous.* distribution #40, release: publish.yml's wheel smoke test never imports Graphik, so a wheel missing graphik.py would still publish #46) is gated on workflow edits or maintainer decisions.
• Manual validation: PASS — Compile and test is green on 3.9–3.13 for this head, and python3 -m pytest -q passed locally (64 tests).
• camelCase / Backward-compat / No new deps: PASS — no public surface or imports changed. The local names (textRectangle) mirror drawText's own naming.
• Headless: PASS — the test runs under the conftest's dummy SDL drivers and needs no display.
• Version sync: PASS (n/a) — no version string changed.

Judgment note: src/test/python/preponderous/graphik/test_graphik.py:596 — the expected rectangle is rebuilt from a separate pygame.font.Font("freesansbold.ttf", size) instead of being read from Graphik's cache, so the test hard-codes the font file drawText uses. If the font ever changes, the rectangle could drift. Since . inks only the bottom of its line, a small drift would still leave the top row free of glyph pixels, so this was accepted.

This review comment was drafted during a Gardener session (https://github.com/Stephenson-Software/gardener).

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drafted by Claude on behalf of Daniel Stephenson