jheapsandClaude Opus 5
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"Ann - $135" is the answer to the arithmetic. The dealer's actual job at that moment
is working out that $135 is a black, a green and two reds, while four people watch
them do it.
The chip legend has known the denominations all along. It was only being used to read
chips *into* an amount -- counting a seat's stack -- and never to turn an amount back
into chips.
Final Payouts
Ann - $135
1x$100, 1x$25, 2x$5
Largest first, which is greedy and so not optimal for an arbitrary set of values. Poker
chips are not arbitrary: every real set is canonical -- each denomination divides the
next, 1/5/25/100/500 -- and greedy is exactly optimal on those. A dealer who invents a
3-and-7 chip set still gets a valid answer, possibly one chip longer than it needed to
be, which is a fair trade for not solving a knapsack in a modal.
Two cases where saying nothing is the right answer, and one where it is not.
A table with no chip legend gets the amount on its own -- it has not told us its
denominations, so there is no advice to give. But a legend that exists and cannot reach
the amount does say so: "$3 no chip covers" when the smallest chip is $5. Half a dollar
in a dollar-chip game is the dealer's problem to solve and they can only solve it if
they are told, so it is never rounded away.
12 tests (244 total): the breakdown adds up to the amount across eight amounts, cent
chips make cent amounts exactly, a jumbled legend still pays largest first, the colour
comes along for a future caller, and the two no-advice cases are told apart from the
cannot-reach one.
Driven through a real all-in hand at four sizes: $135 reads "1x$100, 1x$25, 2x$5" and
a tournament-sized $1,350 reads "2x$500, 3x$100, 2x$25", fitting without spill down to
360px. With the legend emptied the line disappears and the payout stands alone.
Contrast clean, no console errors.
Co-Authored-By: Claude Opus 5 <[email protected]>
Claude-Session: https://claude.ai/code/session_015bnp7xKUPFFSpwkYNFaPgb
Hold'em dealer tests
Unit tests for the money logic behind /Casino/TexasHoldem — the betting engine, the
side-pot calculator, the split calculator and the table state.
node --test tests/holdem/*.test.js
No install step, no package.json, no dependencies. The browser modules are plain
script-tag files that each end with a module.exports guard, so Node can require them
as-is; load.js puts them on globalThis under the same names they use to find each
other in the page, in the load order from TexasHoldem.cshtml.
What's covered
| File | Covers |
|---|---|
potCalculator.test.js |
Main and side pots, dead money, uncalled bets, odd-cent distribution |
betting.test.js |
Blinds, street completion, raises reopening the action, all-in run-outs |
state.test.js |
Button rotation, which seats post blinds, session standings |
splitCalculator.test.js |
Chopped pots, odd chips, unmakeable denominations |
invariants.test.js |
1000 randomised hands per property (see below) |
The layout audit
The unit tests above cover the money. uiAudit.js covers the thing you can only see
in a browser: whether a dealer can actually reach every control.
node tests/holdem/runUiAudit.js # needs Playwright and the site running
It checks WCAG AA contrast, touch target sizes, touch-action and tap highlights, that fields stay selectable and are large enough not to trigger iOS zoom, that nothing important is covered or off-screen with no way to scroll to it, that no grid column has collapsed to nothing, and that no text is painted outside its box. It runs over the table, all five overlays and Quick Split, at thirteen viewports from a 360px phone to a 1600px desktop and the same phones on their side.
Deliberately not in CI: the unit suite is dependency-free and runs in a second, while
this one needs a browser and a running site. Run it after any change that adds or
resizes a control. With no Playwright to hand, paste uiAudit.js into devtools and
call LayoutAudit.runAll().
The contrast check is built so it cannot report a false positive: backgrounds
composite through alpha, and where a gradient is involved every colour stop is tried
and the most flattering one used. A finding means the text fails even under the
reading most generous to it. Two earlier attempts at this got it wrong in both
directions — one read only background-color and scored text on a gradient against
nothing, the other treated low-alpha stops as opaque — so uiAudit.js is checked
against known-answer cases before it is believed.
Touch targets are measured by probing outward with elementFromPoint rather than by
reading the element box, because the box lies in both directions: a small control can
be padded out with a transparent ::after and respond well beyond its painted size,
and a checkbox inside a label is hit by tapping the label. The 44px rule is only
enforced where hover: none says there's no mouse.
It exists because these checks were being re-typed into a console every time something changed, and each time they only covered whatever had just been touched. That is how the standings table shipped with a player-name column zero pixels wide and kept it for two rounds.
Why the randomised suite exists
Every correctness bug found in this tool so far has been shape-dependent: blinds posted to empty chairs, the button skipping past players, heads-up acting out of order, an overbet announced as a side pot. None of them show up on a full six-handed table with equal stacks, which is the table anyone writes a fixed example for.
invariants.test.js deals a thousand hands across random seat counts, random empty
chairs, random stack depths and random dealer input, and checks the things a dealer
would notice being wrong:
- chips are never created or destroyed during play
- the pot breakdown plus the uncalled returns always equal the money that went in
- paying the pot out settles it to the cent
- once uncalled chips are handed back, nobody is still betting above the whole table
- the button and both blinds always land on players who are actually in the hand
The generator is seeded, so a failure reproduces from the seed printed in the message rather than being a flake to re-run.