jheapsandClaude Opus 5
fc866597eb
A straddle is a blind raise put out before the cards by the player left of the
big blind, for twice it. Home games run them constantly, and the tool had no
idea they existed — so a dealer's only way through was to deal the hand and have
the straddler "raise" to $4, which gets the money right and the other two rules
wrong.
There are three at once:
- the amount doubles as it goes left, and re-straddles carry on doubling;
- first to act is left of the *straddler*, not left of the big blind, and the
straddler keeps the option when it comes back round even if nobody raised;
- the minimum raise is twice the straddle. Measured off the big blind
underneath it, a $2/$4 game prices the next raise at $6, and every player at
the table will argue — correctly.
Tap Straddle on the deal prompt and the tool posts it, puts the right player on
the clock and prices the raise. The seat wears an STR badge for the hand, read
off what the deal actually posted rather than off the count, so the badge can't
outlive the chips it stands for. It's a one-hand decision, like posting in, and
it clears when the button moves.
The control sits on the deal row rather than a line of its own: measured at
390x844, its own line cost 44px of felt on every deal prompt, straddle or no
straddle, and this bar is docked over the seats. Three buttons across a 360px
phone want to wrap, which made the bar 64px taller and put the bottom seat three
fifths behind it — this layout deliberately doesn't shrink the felt to suit, so
the deal button is given a 7rem floor instead, which keeps the row to one line
and the cost to nothing.
20 new tests, checked by breaking each of the three rules on purpose first: the
wrong first-to-act, the minimum measured off the big blind, and a flat rather
than doubling chain each fail a different one.
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.