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OpenFrontIO/tests/client
Evan b85d1fc372 Fix alt-view coloring teammates as enemies in team games (#4247)
## Problem

In team games, alternate view (space-hold) colored teammates' units red
(enemy color) instead of yellow (ally color). Teammates' territory
borders had the same problem.

## Root cause

`buildRelationMatrix()` in
`src/client/render/frame/derive/RelationMatrix.ts` already supports an
optional `teams` map that marks same-team pairs as `RELATION_FRIENDLY`,
but the call site in `GameView.populateFrame()` never passed it (the
companion `buildTeamMap` helper was dead code). Only explicit alliances
were marked friendly, so a teammate without a formal alliance read as
neutral — and the alt-view unit palette maps neutral to the enemy color.

## Fix

- `GameView` now tracks a `smallID → team` map, populated when each
`PlayerView` is first created (team is a static field, so once per
player is enough).
- The map is passed through to `buildRelationMatrix()`, which feeds both
the `AffiliationPalette` (unit colors) and `BorderComputePass` (border
colors).

## Testing

- New regression test in `tests/client/view/GameView.test.ts`: same-team
players are `RELATION_FRIENDLY` in `frame.relationMatrix`, cross-team
players stay neutral.
- All 36 GameView tests pass; typecheck clean.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-authored-by: Claude Fable 5 <noreply@anthropic.com>
2026-06-12 15:05:37 -07:00
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