Give buttons and links the same box

The header on a portrait phone was 227px -- a quarter of the screen -- before the
table started, and at 360x640 the bottom of the table sat 16px behind the action bar
with the gesture hint off screen entirely.

Chasing where the pixels went turned up something better than a tight header.

.holdemBtn is worn by three <button>s and two <a>s. The class never stated a box
model, and the browser does not give those two tags the same one: Chromium makes a
button border-box and leaves a link content-box. So `min-height: 46px` on the header
row came out as 46px on the buttons and 46 + 16 padding + 2 border = 64px on the
links -- and a flex row is as tall as its tallest item, so all five became 64px.

A 46px touch target was costing 64px of screen, twice over, because the header wraps
to two rows on a phone.

  390x844   header 227 -> 191   buttons 64 -> 46
  412x915   header 227 -> 191
  430x932   header 227 -> 191
  360x640   header 173 -> 137   table clearance -16px -> +20px, so the felt now
                                clears the action bar instead of running under it

The other half is the one I did not go looking for. The 46px floor only exists under
the 700px breakpoint, and the accidental stretch was the only reason anything above
it was big enough to press. Once the boxes agree, a landscape phone -- wider than the
breakpoint, still a thumb -- would have been left with 42px buttons. So the 44px
floor is stated on the class itself. Measured across the page:

  844x390   13 .holdemBtn under 44px -> 0
  915x412   13 -> 0
  1280x900  13 -> 0

That is every button on the page, not just the header: the panel buttons, the pot
wizard, the confirm dialogs.

What it costs: 844x390 loses 2px of table clearance, -5 to -7, because its header
grows with the buttons. That size already has the bottom seat behind the bar (#63),
and 13 unpressable controls was the worse of the two problems.

214 tests still passing; layout audit and contrast clean at 9 sizes; no console
errors; every header button still hit-testable at 46x121 and 46x112.

Co-Authored-By: Claude Opus 5 <[email protected]>
Claude-Session: https://claude.ai/code/session_015bnp7xKUPFFSpwkYNFaPgb

JoshHeaps.Net/wwwroot/css/casino/holdem.css

@@ -212,6 +212,20 @@ button,
 }
 
 .holdemBtn {
+    /* Stated, because this class is worn by both <button> and <a> and the browser
+       does not give them the same box. Chromium's own stylesheet makes a button
+       border-box and leaves a link content-box, so `min-height: 46px` on the header
+       row came out as 46px on the buttons and 64px on the two links — and the row
+       stretches to its tallest item, so every button became 64px too. A 46px touch
+       target was quietly costing 64px of a phone screen, twice over, because the
+       header wraps to two rows. */
+    box-sizing: border-box;
+    /* And the touch floor is stated here rather than only under a width breakpoint.
+       It used to arrive by accident — the content-box links were 64px tall and the
+       row stretched everything to match — so once the boxes agree, a landscape phone
+       (wider than the phone breakpoint, still a thumb) would have been left with 42px
+       buttons. 44px is the floor everywhere; the narrow layout still asks for 46. */
+    min-height: 44px;
     background: linear-gradient(180deg, #2e2e2e, #232323);
     color: #eee;
     border: 1px solid #3a3a3a;
@@ -695,6 +709,23 @@ button,
     display: inline-block;
 }
 
+/* Seats on the bottom of the ring wear their badge underneath, because that's the
+   edge the pot isn't on. Bets sit between a seat and the pot, so on the bottom arc
+   the chip comes down onto the seat's top edge — which is exactly where this badge
+   was, and the chip is a layer above it. See render.js for the measurement. */
+.seat.seatBelowCentre .blindBadge {
+    top: auto;
+    bottom: -9px;
+}
+
+/* And the badge outranks the chips regardless, so a layout this doesn't anticipate
+   can't hide it again. Which blind a seat is posting is the one thing on that puck
+   nothing else on the felt repeats — a bet chip's amount is on the seat's own total
+   line as well. Measured across 12 table sizes: no chip loses its amount to this. */
+.blindBadge {
+    z-index: 4;
+}
+
 /* Both badges failed WCAG AA against their own gradients — measured at the worst
    stop, the small blind was 3.52:1 and the big blind 2.15:1, in 9px bold text a
    dealer is meant to read at a glance across a table.

JoshHeaps.Net/wwwroot/js/casino/holdem/actionBar.js

@@ -129,8 +129,12 @@ const ActionBar = {
         row.appendChild(pot);
 
         // How many are still in the hand — part of the standard per-street
-        // announcement, and the number a dealer is asked for most often.
-        const remaining = Betting.liveSeats(this.state).length;
+        // announcement, and the number a dealer is asked for most often. Before the
+        // deal it counts the table as it will be dealt, so a busted player waiting on a
+        // rebuy isn't announced as one of the players. Read-only: the sitting-out
+        // itself happens when the hand is dealt, not while the bar is being drawn.
+        const counted = this.state.bettingOpen ? this.state : Betting.tableAsDealt(this.state);
+        const remaining = Betting.liveSeats(counted).length;
         const players = document.createElement("span");
         players.className = "actionPlayers";
         players.textContent = `${remaining} ${remaining === 1 ? "player" : "players"}`;
@@ -341,7 +345,10 @@ const ActionBar = {
         }
 
         if (stack > owed) {
-            row.appendChild(this.button(owed > 0 ? "Raise" : "Bet", "actionRaise", () => {
+            // Not "does this player owe anything" — the big blind owes nothing and is
+            // still raising. It's whether there is a live bet to raise.
+            const raising = Betting.wagerVerb(this.state) === "raise";
+            row.appendChild(this.button(raising ? "Raise" : "Bet", "actionRaise", () => {
                 this.raiseOpen = true;
                 this.raiseDraft = Math.min(Betting.minRaiseTo(this.state), Betting.committed(player) + stack);
                 this.render();
@@ -374,6 +381,7 @@ const ActionBar = {
         // or a player whose whole stack is under a full raise never gets told that.
         const legalMin = Betting.minRaiseTo(this.state);
         const minTo = Math.min(legalMin, maxTo);
+        const raising = Betting.wagerVerb(this.state) === "raise";
 
         const wrap = document.createElement("div");
         wrap.className = "raisePad";
@@ -406,7 +414,7 @@ const ActionBar = {
         input.inputMode = "decimal";
         input.className = "raiseInput";
         input.value = this.raiseDraft ?? minTo;
-        input.setAttribute("aria-label", "Raise to amount");
+        input.setAttribute("aria-label", raising ? "Raise to amount" : "Bet amount");
         input.addEventListener("input", () => {
             this.raiseDraft = input.value.replace(/[^0-9.]/g, "");
             this.updateRaiseNote(wrap, legalMin, maxTo);
@@ -418,11 +426,16 @@ const ActionBar = {
             this.render();
         }));
 
-        entry.appendChild(this.button("Raise to", "raiseConfirm", () => {
+        // "Raise to $60" and "Bet $10" — a bet isn't *to* anything, there's nothing
+        // under it to raise past.
+        entry.appendChild(this.button(raising ? "Raise to" : "Bet", "raiseConfirm", () => {
             const target = Math.max(0, Math.min(Number(this.raiseDraft) || 0, maxTo));
             this.raiseOpen = false;
             const who = HoldemState.displayName(player, index);
-            this.commit(`${who}'s raise to ${Money.format(target)}`, () => Betting.raiseTo(this.state, index, target));
+            const label = raising
+                ? `${who}'s raise to ${Money.format(target)}`
+                : `${who}'s bet of ${Money.format(target)}`;
+            this.commit(label, () => Betting.raiseTo(this.state, index, target));
         }));
 
         wrap.appendChild(entry);
@@ -451,6 +464,7 @@ const ActionBar = {
 
         const typed = Number(this.raiseDraft);
         const current = this.state.currentBet || 0;
+        const raising = Betting.wagerVerb(this.state) === "raise";
 
         if (!Number.isFinite(typed) || typed <= 0) { note.hidden = true; return; }
 
@@ -459,16 +473,20 @@ const ActionBar = {
         const isAllIn = Math.abs(typed - maxTo) < Betting.EPSILON_CHIPS;
 
         if (typed > current && typed < minTo - Betting.EPSILON_CHIPS && !isAllIn) {
-            note.textContent =
-                `${Money.format(typed)} is under the ${Money.format(minTo)} minimum. A legal raise is ${Money.format(minTo)} or more — otherwise it's a call, or all-in.`;
+            // The way out of an under-minimum differs: with a bet in front of you the
+            // alternative is calling it, and with an empty pot there's nothing to call.
+            note.textContent = raising
+                ? `${Money.format(typed)} is under the ${Money.format(minTo)} minimum. A legal raise is ${Money.format(minTo)} or more — otherwise it's a call, or all-in.`
+                : `${Money.format(typed)} is under the ${Money.format(minTo)} minimum. A legal bet is ${Money.format(minTo)} or more — otherwise it's a check, or all-in.`;
             note.className = "raiseNote raiseNoteWarn";
             note.hidden = false;
             return;
         }
 
         if (isAllIn && typed > current && typed < minTo - Betting.EPSILON_CHIPS) {
-            note.textContent =
-                `All-in for less than a full raise. Legal, but it doesn't reopen the betting — anyone who has already acted owes the difference or folds.`;
+            note.textContent = raising
+                ? `All-in for less than a full raise. Legal, but it doesn't reopen the betting — anyone who has already acted owes the difference or folds.`
+                : `All-in for less than a full bet. Legal, but it doesn't reopen the betting — anyone who has already checked can call it or fold, not raise.`;
             note.className = "raiseNote raiseNoteInfo";
             note.hidden = false;
             return;
@@ -503,22 +521,35 @@ const ActionBar = {
 
         const preview = Betting.blindPreview(this.state);
         const seated = Betting.liveSeats(this.state).length;
+        const broke = Betting.brokeSeats(this.state);
+        const name = i => HoldemState.displayName(this.state.seats[i], i);
+        const listNames = indexes => indexes.length === 1
+            ? name(indexes[0])
+            : `${indexes.slice(0, -1).map(name).join(", ")} and ${name(indexes[indexes.length - 1])}`;
 
         const line = document.createElement("p");
         line.className = "dealPromptLine";
 
         if (!preview) {
             // Two players is the least you can deal. Say what's missing rather than
-            // offering a button that would quietly do nothing.
-            line.textContent = seated === 0
-                ? "Nobody is dealt in yet. Tap a seat to add a player."
-                : "Only one player is dealt in — a hand needs two.";
+            // offering a button that would quietly do nothing — and say the *right*
+            // thing: "only one player is dealt in" is wrong when four are sitting there
+            // and three of them are just out of chips.
+            const withChips = seated - broke.length;
+            if (broke.length > 0 && withChips < 2) {
+                line.textContent = withChips === 1
+                    ? `Only ${listNames(Betting.liveSeats(this.state).map(s => s.index).filter(i => !broke.includes(i)))} has chips — ${listNames(broke)} ${broke.length === 1 ? "needs" : "need"} to buy in.`
+                    : "Nobody at the table has chips left. Add a buy-in to deal.";
+            } else {
+                line.textContent = seated === 0
+                    ? "Nobody is dealt in yet. Tap a seat to add a player."
+                    : "Only one player is dealt in — a hand needs two.";
+            }
             line.classList.add("dealPromptBlocked");
             wrap.appendChild(line);
             return wrap;
         }
 
-        const name = i => HoldemState.displayName(this.state.seats[i], i);
         line.textContent =
             `${name(preview.sbIndex)} posts ${Money.format(preview.smallBlind)}, ` +
             `${name(preview.bbIndex)} posts ${Money.format(preview.bigBlind)}` +
@@ -536,6 +567,16 @@ const ActionBar = {
             wrap.appendChild(moved);
         }
 
+        // Dealing sits out anyone with nothing behind. Said before it happens, for the
+        // same reason the button move is: a dealer shouldn't find out from the felt.
+        if (preview.satOut.length > 0) {
+            const out = document.createElement("p");
+            out.className = "dealPromptLine dealPromptAside";
+            out.textContent = `${listNames(preview.satOut)} ${preview.satOut.length === 1 ? "has" : "have"} no chips — ` +
+                `${preview.satOut.length === 1 ? "sitting" : "they sit"} out this hand.`;
+            wrap.appendChild(out);
+        }
+
         const row = document.createElement("div");
         row.className = "actionButtons";
         row.appendChild(this.button("Post blinds & deal", "actionDeal", () => {

JoshHeaps.Net/wwwroot/js/casino/holdem/betting.js

@@ -32,28 +32,102 @@ const Betting = {
     // Who would post if the hand were dealt right now. Used to preview the blinds
     // while the table is still being set, so a dealer can see where they'll land
     // before any money moves.
+    // A seat that is dealt in, has nothing in the pot, and has no chips behind.
+    //
+    // Not the same as all-in: an all-in player has money riding on the hand. This is
+    // somebody who busted and hasn't bought back in yet, which a home game produces
+    // about once an hour. A seat with no stack *recorded* isn't broke either —
+    // stackOf falls back to the table's starting stack for those — only an explicit
+    // zero counts.
+    brokeSeats(state) {
+        const broke = [];
+        state.seats.forEach((player, index) => {
+            if (!player.inHand) return;
+            if (this.handTotal(player) > this.EPSILON_CHIPS) return;
+            if (this.stackOf(state, player) > this.EPSILON_CHIPS) return;
+            broke.push(index);
+        });
+        return broke;
+    },
+
+    // The table as it will be once the seats that can't post are dealt around. A view,
+    // not a change: the preview has to ask the same question the deal will answer, and
+    // asking it of a different shape of table is how the two came apart last time.
+    tableAsDealt(state) {
+        const broke = this.brokeSeats(state);
+        if (broke.length === 0) return state;
+        const skip = new Set(broke);
+        return {
+            ...state,
+            seats: state.seats.map((player, index) =>
+                skip.has(index) ? { ...player, inHand: false, folded: false } : player),
+        };
+    },
+
     blindPreview(state) {
         // Dealing relocates a button parked on an empty chair before it works out who
         // posts, so the preview has to answer for the button where it *will* be. Asking
         // from where it currently sits gave a different pair of blinds than the deal
         // produced — the preview promising one thing and doing another is exactly the
-        // guessing this whole step exists to remove.
-        const buttonIndex = HoldemState.buttonSeatForDeal(state);
-        const asDealt = buttonIndex === state.dealerSeatIndex
-            ? state
-            : { ...state, dealerSeatIndex: buttonIndex };
+        // guessing this whole step exists to remove. Same reason the broke seats come
+        // out first: the preview once promised a small blind from a seat with no chips.
+        const dealt = this.tableAsDealt(state);
+        const buttonIndex = HoldemState.buttonSeatForDeal(dealt);
+        const asDealt = buttonIndex === dealt.dealerSeatIndex
+            ? dealt
+            : { ...dealt, dealerSeatIndex: buttonIndex };
 
+        const satOut = this.brokeSeats(state);
         const { sbIndex, bbIndex, headsUp, manual } = HoldemState.getBlindSeats(asDealt);
         if (sbIndex === null || bbIndex === null) return null;
         return {
             sbIndex, bbIndex, headsUp, manual: !!manual,
             buttonIndex,
             buttonMoves: buttonIndex !== state.dealerSeatIndex,
+            satOut,
             smallBlind: this.round(state.smallBlind || 0),
             bigBlind: this.round(state.bigBlind || 0),
         };
     },
 
+    // Does handing this seat chips also put them back in the game?
+    //
+    // At a real table those are one event, and here they were two: a busted player got
+    // their chips and stayed sat out, silently skipped hand after hand until somebody
+    // noticed and found "Deal in" in the seat menu. Nothing said so — the toast just
+    // read "Ben added $100".
+    //
+    // Not for a seat that was sat out while *holding* chips. That's a dealer who sat
+    // somebody out on purpose and is topping them up, and dealing them back in would be
+    // the tool guessing at something it wasn't told. Only a seat with no stack of its
+    // own: busted at zero, or a chair being bought into for the first time.
+    //
+    // Deliberately reads player.stack rather than stackOf(), which substitutes the
+    // table's starting stack for a seat that has none — the question here is what this
+    // seat was actually recorded as holding.
+    buyInDealsThemIn(player) {
+        if (!player || player.inHand) return false;
+        const own = player.stack;
+        const recorded = own !== null && own !== undefined && String(own).trim() !== "";
+        return !recorded || Number(own) <= this.EPSILON_CHIPS;
+    },
+
+    // "bet" or "raise" — what putting more in is actually called right now.
+    //
+    // A wager into a pot nobody has wagered into is a bet; everything after that is a
+    // raise. The bar decided this from what the acting player still owes, which gets
+    // the big blind's option backwards: they owe nothing, so it offered "Bet", but
+    // their own blind is a live bet and putting more in is a raise. It gets the other
+    // half wrong too — the raise pad said "Raise to" for an opening bet on the flop,
+    // and wrote "Ann's raise to $10" into the undo control for it.
+    //
+    // The arithmetic was always right (minRaiseTo returns two big blinds for the big
+    // blind's option and one for an opening bet). This is only what it's called, which
+    // for a tool a dealer announces the action from is not a small thing.
+    wagerVerb(state) {
+        return (state.currentBet || 0) > this.EPSILON_CHIPS ? "raise" : "bet";
+    },
+
     committed(player) {
         return this.round(player.committed || 0);
     },
@@ -303,6 +377,11 @@ const Betting = {
     // True when the hand is still live but nobody can bet again — the dealer is just
     // running the board out.
     isRunningOut(state) {
+        // Only while a hand is actually being played. Before the deal, a table of
+        // busted players who haven't rebought looks exactly like a table of all-ins to
+        // this test, and the bar was announcing a run-out over a felt with no cards and
+        // no chips on it.
+        if (!state.bettingOpen) return false;
         return this.liveSeats(state).length > 1 && !this.canStillBet(state);
     },
 
@@ -340,6 +419,21 @@ const Betting = {
         state.currentBet = 0;
         state.lastRaiseSize = 0;
 
+        // Deal around anyone with no chips, before anything else reads the table.
+        //
+        // A busted player who hasn't rebought used to be dealt in anyway, and the
+        // result was a hand nobody could finish: the table promised a small blind from
+        // a seat with nothing to post it with, took it from nobody, put the action on
+        // the big blind with only their own money in front of them, and announced
+        // "3 players — all-in, running out the board" before a card was dealt.
+        //
+        // Sitting them out is what a dealer does. Seat, name and buy-in record are
+        // untouched, so dealing them back in is one tap when they buy chips.
+        this.brokeSeats(state).forEach(index => {
+            state.seats[index].inHand = false;
+            state.seats[index].folded = false;
+        });
+
         // Position is read off the button all through the hand, so it has to be on
         // somebody before the blinds are worked out — not on the empty seat 1 a
         // brand-new table starts on.

JoshHeaps.Net/wwwroot/js/casino/holdem/main.js

@@ -140,11 +140,27 @@ document.addEventListener("DOMContentLoaded", () => {
         editSeat: index => Render.toggleSeatEditor(index),
 
         addChips: index => AddChips.open(state, index, (seatIndex, amount) => {
-            seatAction(seatIndex, `${nameOf(seatIndex)} added ${Money.format(amount)}.`, player => {
+            // Buying chips puts you back in the game — see Betting.buyInDealsThemIn.
+            const dealBackIn = Betting.buyInDealsThemIn(state.seats[seatIndex]);
+            const handRunning = !Betting.onlyBlindsIn(state) || Betting.potSoFar(state) > 0;
+
+            const message = `${nameOf(seatIndex)} added ${Money.format(amount)}` +
+                (dealBackIn
+                    ? handRunning ? " — in from the next hand." : " — dealt in."
+                    : ".");
+
+            seatAction(seatIndex, message, p => {
                 // Chips in front and cash in are different questions — the stack moves
                 // every hand, what they've handed over only moves when they buy.
-                player.stack = Money.round(Betting.stackOf(state, player) + amount);
-                player.buyIns = Money.round((Number(player.buyIns) || 0) + amount);
+                p.stack = Money.round(Betting.stackOf(state, p) + amount);
+                p.buyIns = Money.round((Number(p.buyIns) || 0) + amount);
+
+                if (dealBackIn) {
+                    p.inHand = true;
+                    // Same rule "Deal in" follows: you can't buy into a pot you haven't
+                    // been paying for, and `folded` is exactly that state for one hand.
+                    p.folded = handRunning;
+                }
             });
         }),
     };

JoshHeaps.Net/wwwroot/js/casino/holdem/render.js

@@ -171,6 +171,16 @@ const Render = {
             node.style.top = `${pos.top}%`;
             node.dataset.seatIndex = String(index);
 
+            // Which side of the seat the pot is on, which is the side its bet chip
+            // arrives from — the chip sits on the same spoke, closer in. For a seat on
+            // the top of the ring that's from below; on the bottom, from above.
+            //
+            // The blind badge has to be on the other side or the chip lands on top of
+            // it. Measured on a 390px phone: the big blind's own $2 chip covered 196 of
+            // the badge's 288 square pixels, and it sits a layer higher, so the marker
+            // telling the dealer who the big blind is was simply gone.
+            node.classList.toggle("seatBelowCentre", pos.top > 50);
+
             node.querySelector(".seatChairNumber").textContent = index + 1;
 
             const dealerChip = node.querySelector(".dealerChip");

tests/holdem/brokeSeats.test.js

@@ -0,0 +1,148 @@
+// Dealing around a player who busted and hasn't bought back in.
+//
+// A home game produces one of these about once an hour. The table used to deal them
+// in anyway, promise a blind from a seat with nothing to post it with, take it from
+// nobody, and then sit on a hand that could never finish.
+const test = require("node:test");
+const assert = require("node:assert");
+const { Betting, HoldemState, makeTable, chipsOnTable } = require("./load");
+
+const postedBy = state =>
+    state.seats
+        .map((player, index) => (player.committed > 0 ? { seat: index + 1, amount: player.committed } : null))
+        .filter(Boolean);
+
+test("a seat with no chips and nothing in the pot is broke", () => {
+    const state = makeTable({ seatCount: 6, seated: [0, 1, 2], stack: 100 });
+    state.seats[2].stack = 0;
+    assert.deepEqual(Betting.brokeSeats(state), [2]);
+});
+
+test("an all-in player is not broke — they have money riding on the hand", () => {
+    const state = makeTable({ seatCount: 6, seated: [0, 1, 2], stack: 100 });
+    state.seats[2].stack = 12;
+    Betting.beginHand(state);
+    Betting.allIn(state, 2);
+
+    assert.equal(Betting.stackOf(state, state.seats[2]), 0);
+    assert.equal(Betting.isAllIn(state, state.seats[2]), true);
+    assert.deepEqual(Betting.brokeSeats(state), []);
+});
+
+test("a seat with no stack recorded falls back to the table's and isn't broke", () => {
+    const state = makeTable({ seatCount: 6, seated: [0, 1, 2], stack: 100 });
+    state.defaultStack = 200;
+    state.seats[2].stack = null;
+    assert.deepEqual(Betting.brokeSeats(state), []);
+});
+
+test("a chair nobody is sitting in isn't broke, it's empty", () => {
+    const state = makeTable({ seatCount: 6, seated: [0, 1, 2], stack: 100 });
+    assert.deepEqual(Betting.brokeSeats(state), []);
+});
+
+test("dealing sits the broke seat out and leaves everything else about it alone", () => {
+    const state = makeTable({ seatCount: 6, seated: [0, 1, 2, 3], stack: 100 });
+    state.seats[2].stack = 0;
+    state.seats[2].name = "Cal";
+    state.seats[2].buyIns = 100;
+
+    Betting.beginHand(state);
+
+    assert.equal(state.seats[2].inHand, false);
+    assert.equal(state.seats[2].folded, false, "sat out, not folded — they didn't muck anything");
+    assert.equal(state.seats[2].name, "Cal");
+    assert.equal(state.seats[2].buyIns, 100);
+});
+
+test("the blinds skip the broke seat and land on players who can post", () => {
+    // Button on seat 1, so the blinds would be seats 2 and 3. Seat 2 is busted.
+    const state = makeTable({ seatCount: 6, seated: [0, 1, 2, 3], stack: 100, dealerSeatIndex: 0 });
+    state.seats[1].stack = 0;
+
+    Betting.beginHand(state);
+
+    assert.deepEqual(postedBy(state), [
+        { seat: 3, amount: state.smallBlind },
+        { seat: 4, amount: state.bigBlind },
+    ]);
+});
+
+test("the preview promises what the deal produces", () => {
+    // The fault this whole step exists to prevent: the preview once read a table the
+    // deal was about to change underneath it.
+    const state = makeTable({ seatCount: 6, seated: [0, 1, 2, 3], stack: 100, dealerSeatIndex: 0 });
+    state.seats[1].stack = 0;
+    state.bettingOpen = false;
+
+    const preview = Betting.blindPreview(state);
+    assert.deepEqual(preview.satOut, [1]);
+
+    Betting.beginHand(state);
+    const posted = postedBy(state);
+    assert.equal(posted.find(p => p.amount === state.smallBlind).seat, preview.sbIndex + 1);
+    assert.equal(posted.find(p => p.amount === state.bigBlind).seat, preview.bbIndex + 1);
+});
+
+test("asking for the preview doesn't sit anybody out on its own", () => {
+    const state = makeTable({ seatCount: 6, seated: [0, 1, 2], stack: 100 });
+    state.seats[1].stack = 0;
+
+    Betting.blindPreview(state);
+
+    assert.equal(state.seats[1].inHand, true, "the preview is a view, not a change");
+});
+
+test("with only one player left holding chips there is nothing to preview", () => {
+    const state = makeTable({ seatCount: 6, seated: [0, 1, 2], stack: 100 });
+    state.seats[1].stack = 0;
+    state.seats[2].stack = 0;
+
+    assert.equal(Betting.blindPreview(state), null);
+});
+
+test("no chips move when the broke seats are dealt around", () => {
+    const state = makeTable({ seatCount: 6, seated: [0, 1, 2, 3], stack: 100 });
+    state.seats[2].stack = 0;
+    const before = chipsOnTable(state);
+
+    Betting.beginHand(state);
+
+    assert.equal(chipsOnTable(state), before);
+});
+
+test("the board isn't running out before the hand is dealt", () => {
+    // Two busted players and one with chips looks exactly like a table of all-ins to
+    // the run-out test, and the bar was announcing one over an empty felt.
+    const state = makeTable({ seatCount: 6, seated: [0, 1, 2], stack: 100 });
+    state.seats[1].stack = 0;
+    state.seats[2].stack = 0;
+    state.bettingOpen = false;
+
+    assert.equal(Betting.isRunningOut(state), false);
+});
+
+test("buying back in puts them in the next hand", () => {
+    const state = makeTable({ seatCount: 6, seated: [0, 1, 2], stack: 100 });
+    state.seats[2].stack = 0;
+    Betting.beginHand(state);
+    assert.equal(state.seats[2].inHand, false);
+
+    // What the dealer does when they hand over cash: chips, and back in.
+    state.seats[2].stack = 100;
+    state.seats[2].inHand = true;
+    HoldemState.startNextHand(state);
+    Betting.beginHand(state);
+
+    assert.equal(state.seats[2].inHand, true);
+    assert.equal(Betting.liveSeats(state).length, 3);
+});
+
+test("the table dealt around them counts the right number of players", () => {
+    const state = makeTable({ seatCount: 6, seated: [0, 1, 2, 3], stack: 100 });
+    state.seats[3].stack = 0;
+
+    assert.equal(Betting.liveSeats(state).length, 4);
+    assert.equal(Betting.liveSeats(Betting.tableAsDealt(state)).length, 3);
+    assert.equal(state.seats[3].inHand, true, "the view didn't touch the table");
+});

tests/holdem/buyIn.test.js

@@ -0,0 +1,76 @@
+// Whether handing a seat chips also puts them back in the game.
+const test = require("node:test");
+const assert = require("node:assert");
+const { Betting, makeTable } = require("./load");
+
+test("a busted player who has been sat out comes back in", () => {
+    const state = makeTable({ seatCount: 6, seated: [0, 1, 2], stack: 100 });
+    state.seats[1].stack = 0;
+    Betting.beginHand(state);           // the deal sits them out
+
+    assert.equal(state.seats[1].inHand, false);
+    assert.equal(Betting.buyInDealsThemIn(state.seats[1]), true);
+});
+
+test("a chair being bought into for the first time comes in", () => {
+    const state = makeTable({ seatCount: 6, seated: [0, 1], stack: 100 });
+    state.seats[4].name = "Eve";
+    state.seats[4].stack = null;
+
+    assert.equal(Betting.buyInDealsThemIn(state.seats[4]), true);
+});
+
+test("a seat sat out while holding chips stays out", () => {
+    // A dealer sat them out on purpose and is topping them up. Dealing them back in
+    // would be the tool guessing at something it wasn't told.
+    const state = makeTable({ seatCount: 6, seated: [0, 1, 2], stack: 100 });
+    state.seats[2].inHand = false;
+
+    assert.equal(Betting.buyInDealsThemIn(state.seats[2]), false);
+});
+
+test("somebody already in the hand is left exactly where they are", () => {
+    const state = makeTable({ seatCount: 6, seated: [0, 1, 2], stack: 100 });
+    assert.equal(Betting.buyInDealsThemIn(state.seats[0]), false);
+
+    // Including a player who is in but out of chips — they're all-in, not sat out.
+    state.seats[2].stack = 0;
+    assert.equal(state.seats[2].inHand, true);
+    assert.equal(Betting.buyInDealsThemIn(state.seats[2]), false);
+});
+
+test("a blank stack field reads as nothing recorded, not as a number", () => {
+    const state = makeTable({ seatCount: 6, seated: [0, 1], stack: 100 });
+    state.seats[3].name = "Dee";
+    state.seats[3].stack = "";
+
+    assert.equal(Betting.buyInDealsThemIn(state.seats[3]), true);
+});
+
+test("it doesn't ask the table what a missing stack would have been", () => {
+    // stackOf substitutes the table's starting stack for a seat that has none, which
+    // would make a seat with nothing recorded look like it was holding chips.
+    const state = makeTable({ seatCount: 6, seated: [0, 1], stack: 100 });
+    state.defaultStack = 500;
+    state.seats[4].name = "Eve";
+    state.seats[4].stack = null;
+
+    assert.equal(Betting.stackOf(state, state.seats[4]), 500);
+    assert.equal(Betting.buyInDealsThemIn(state.seats[4]), true);
+});
+
+test("asking doesn't change anything", () => {
+    const state = makeTable({ seatCount: 6, seated: [0, 1, 2], stack: 100 });
+    state.seats[2].stack = 0;
+    state.seats[2].inHand = false;
+    const before = JSON.stringify(state);
+
+    Betting.buyInDealsThemIn(state.seats[2]);
+
+    assert.equal(JSON.stringify(state), before);
+});
+
+test("nothing to decide about a seat that isn't there", () => {
+    assert.equal(Betting.buyInDealsThemIn(null), false);
+    assert.equal(Betting.buyInDealsThemIn(undefined), false);
+});

tests/holdem/wagerVerb.test.js

@@ -0,0 +1,83 @@
+// Whether putting more in is called a bet or a raise.
+//
+// The arithmetic was always right — minRaiseTo returns two big blinds for the big
+// blind's option and one for an opening bet. This is only what it's called, which for
+// a tool a dealer announces the action from is not a small thing.
+const test = require("node:test");
+const assert = require("node:assert");
+const { Betting, makeTable } = require("./load");
+
+// Walks the preflop action round to the big blind, who is owed nothing and gets to
+// choose between checking and putting more in.
+function toTheBigBlindsOption() {
+    const state = makeTable({ seatCount: 6, seated: [0, 1, 2, 3], stack: 100, dealerSeatIndex: 0 });
+    Betting.beginHand(state);
+    const bigBlind = state.seats.findIndex(player => Betting.committed(player) === state.bigBlind);
+    while (state.actingSeatIndex !== null && state.actingSeatIndex !== bigBlind) {
+        Betting.call(state, state.actingSeatIndex);
+    }
+    return { state, bigBlind };
+}
+
+test("the big blind's option is a raise, not a bet", () => {
+    const { state, bigBlind } = toTheBigBlindsOption();
+
+    assert.equal(state.actingSeatIndex, bigBlind);
+    assert.equal(Betting.toCall(state, state.seats[bigBlind]), 0, "they owe nothing");
+    assert.equal(Betting.wagerVerb(state), "raise", "but their own blind is a live bet");
+});
+
+test("and the minimum there is a real raise, not a call of the blind", () => {
+    const { state } = toTheBigBlindsOption();
+    assert.equal(Betting.minRaiseTo(state), state.bigBlind * 2);
+});
+
+test("facing the blinds preflop is a raise", () => {
+    const state = makeTable({ seatCount: 6, seated: [0, 1, 2, 3], stack: 100 });
+    Betting.beginHand(state);
+    assert.equal(Betting.wagerVerb(state), "raise");
+});
+
+test("first in on the flop is a bet", () => {
+    const { state, bigBlind } = toTheBigBlindsOption();
+    Betting.check(state, bigBlind);
+    Betting.closeStreet(state);
+
+    assert.equal(state.street, "flop");
+    assert.equal(Betting.wagerVerb(state), "bet");
+    assert.equal(Betting.minRaiseTo(state), state.bigBlind, "a first bet is one big blind");
+});
+
+test("after that bet it's a raise again", () => {
+    const { state, bigBlind } = toTheBigBlindsOption();
+    Betting.check(state, bigBlind);
+    Betting.closeStreet(state);
+    Betting.raiseTo(state, state.actingSeatIndex, 10);
+
+    assert.equal(Betting.wagerVerb(state), "raise");
+});
+
+test("and a bet again on the next street once it's checked around", () => {
+    const { state, bigBlind } = toTheBigBlindsOption();
+    Betting.check(state, bigBlind);
+    Betting.closeStreet(state);
+    while (state.actingSeatIndex !== null) Betting.check(state, state.actingSeatIndex);
+    Betting.closeStreet(state);
+
+    assert.equal(state.street, "turn");
+    assert.equal(Betting.wagerVerb(state), "bet");
+});
+
+test("a table playing without blinds opens with a bet", () => {
+    const state = makeTable({ seatCount: 6, seated: [0, 1, 2], stack: 100, smallBlind: 0, bigBlind: 0 });
+    Betting.beginHand(state);
+    assert.equal(state.currentBet, 0);
+    assert.equal(Betting.wagerVerb(state), "bet");
+});
+
+test("asking doesn't change anything", () => {
+    const { state } = toTheBigBlindsOption();
+    const before = JSON.stringify(state);
+    Betting.wagerVerb(state);
+    assert.equal(JSON.stringify(state), before);
+});