prometeu-studio/discussion/workflow/plans/PLN-0091-variable-glyph-palette-tests-fixtures-and-final-validation.md

id	ticket	title	status	created	completed	ref_decisions	tags
PLN-0091	variable-tile-bank-palette-serialization	Variable Glyph Palette Tests, Fixtures, and Final Validation	open	2026-07-14		DEC-0038	tests fixtures validation glyph-bank palette-serialization

Objective

Update tests and fixtures to prove Studio/packer emit runtime-conforming variable glyph palette payloads and contain no stale fixed-padding assumptions.

Background

DEC-0038 requires downstream fixture coverage for palette_count = 1, an intermediate count, and palette_count = 64, plus producer validation for metadata/payload mismatch. Earlier tests still assert palette_count = 64, 4096-byte palette blocks, and fixed glyph payload sizes.

Scope

Included

• Update packer unit tests and integration-style workspace tests.
• Update packer fixture asset.json files and expected runtime payload checks.
• Update Studio tests only where Studio projections or UI logic expose effective palette count.
• Run focused and broad validation.

Excluded

• Runtime repository tests.
• New feature design.
• Palette remapping behavior.

Execution Steps

Step 1 - Update packer parser and metadata tests

What: Prove effective palette_count validation.

How: Add tests for palette_count = 1, intermediate counts, 64, duplicate/sparse direct identity behavior, and rejection above 64.

File(s):

• prometeu-packer/prometeu-packer-v1/src/test/java/p/packer/services/PackerAssetDeclarationParserTest.java
• prometeu-packer/prometeu-packer-v1/src/test/java/p/packer/repositories/PackerGlyphBankWalkerTest.java

Step 2 - Update payload and asset table tests

What: Prove variable payload lengths and size formulas.

How: Replace fixed 4096-byte expectations with palette_count * 16 * 4. Assert size, decoded_size, payload offsets, and RGBA bytes for several counts.

File(s):

• prometeu-packer/prometeu-packer-v1/src/test/java/p/packer/services/FileSystemPackerWorkspaceServiceTest.java
• prometeu-packer/prometeu-packer-v1/src/test/java/p/packer/repositories/PackerRuntimeAssetMaterializerTest.java
• prometeu-packer/prometeu-packer-v1/src/test/java/p/packer/services/PackerRuntimePatchServiceTest.java
• prometeu-packer/prometeu-packer-v1/src/test/java/p/packer/services/PackerRuntimeRegistryTest.java

Step 3 - Update fixtures

What: Replace stale fixed-padding fixtures.

How: Regenerate or edit packer test fixtures so at least one glyph bank uses palette_count = 1, one uses an intermediate count, and one uses 64. Fixtures with fixed 64 padding are valid only when metadata says palette_count = 64.

File(s):

• prometeu-packer/prometeu-packer-v1/src/test/resources/fixtures/**/asset.json
• Related binary or generated expected payload fixtures under packer test resources.

Step 4 - Update Studio tests

What: Cover Studio-facing projection changes.

How: Adjust tests only where Studio surfaces effective palette counts or metadata. Keep color rendering assertions focused on rgba8888.

File(s):

• prometeu-studio/src/test/java/p/studio/workspaces/assets/details/**

Step 5 - Run validation and residue scans

What: Prove no normal-path fixed-padding residue remains.

How: Run relevant Gradle tests and search normal specs/code/tests/fixtures for stale palette_count = 64, 4096, fixed 64 * 16 * 4, GLYPH/indexed_v2, and sparse remapping language. Classify any remaining match as historical, max-bound, or a bug.

File(s):

• docs/specs/packer/**
• docs/specs/studio/**
• prometeu-packer/**
• prometeu-studio/**

Test Requirements

Unit Tests

• Packer parser, walker, materializer, details/read, and workspace service tests pass.
• Studio asset details tests pass where touched.

Integration Tests

• Packer workspace build/materialization tests pass.
• Repository build or narrow Studio/packer build validation passes.

Manual Verification

• Residue scan finds no normal-path fixed-padding contract text or code.
• discussion validate passes.

Acceptance Criteria

• Tests cover palette_count = 1, an intermediate count, and 64.
• Tests cover variable size and decoded_size.
• Tests cover emitted palette byte length and RGBA order.
• Tests cover metadata/payload mismatch rejection or producer validation.
• Fixtures no longer rely on fixed 64-palette padding unless count is 64.
• Validation commands pass.
• Residue scan results are clean or explicitly classified.

Dependencies

• Depends on PLN-0087, PLN-0088, PLN-0089, and PLN-0090.

Risks

• Generated project fixtures may require regeneration rather than manual edits.
• Broad residue scans may include historical discussions; scope final checks to active specs, code, tests, and fixtures.