1 files changed, 15 insertions, 1 deletions
diff --git a/tools/amount-field-unit-test.js b/tools/amount-field-unit-test.js
index b984064..596969d 100644
--- a/tools/amount-field-unit-test.js
+++ b/tools/amount-field-unit-test.js
@@ -2,6 +2,8 @@
 // showing: in fiat that is money to the cent, floored so a filled-in maximum
 // never parses back to more sats than were offered — not a BTC figure under a
 // CAD label (2026-10-08: Max on an ark recipient filled 0.00004978 'CAD').
+// Switching the unit with an amount already typed into the send form converts
+// it (2026-10-23): the same money in the new unit, round-tripping exactly.
 // Run: bun tools/amount-field-unit-test.js
 import assert from 'node:assert/strict';
 import puppeteer from './puppeteer.js';
@@ -9,7 +11,7 @@ import puppeteer from './puppeteer.js';
 const bundle = await Bun.build({ entrypoints: ['src/app.js'], target: 'browser', minify: true,
   plugins: [{ name: 'amount-field-test', setup(build) {
     build.onLoad({ filter: /src\/app\.js$/ }, async ({ path }) => ({ loader: 'js', contents: await Bun.file(path).text() + `
-window.amtApp = { ctx, toggleUnit, get unit() { return unit; } };
+window.amtApp = { ctx, ui, toggleUnit, get unit() { return unit; } };
 ` }));
     build.onLoad({ filter: /src\/video-compress\.js$/ }, () => ({ loader: 'js', contents: 'export async function compressVideo(f) { return f; }' }));
   } }] });
@@ -37,6 +39,13 @@ try {
     while (amtApp.unit !== 'sats') amtApp.toggleUnit();
     out.sats = ctx.amountField(62212);
     amtApp.toggleUnit(); out.btc = ctx.amountField(62212);
+    // typed into the send form, then the unit toggled around the ring
+    while (amtApp.unit !== 'sats') amtApp.toggleUnit();
+    const rs = amtApp.ui.send.recipients;
+    rs[0].amount = '62212'; rs.push({ address: '', amount: '93.318' }, { address: '', amount: '' }, { address: '', amount: 'abc' });
+    out.ring = [];
+    for (let i = 0; i < 3; i++) { amtApp.toggleUnit(); out.ring.push([amtApp.unit, ...rs.map((r) => r.amount)]); }
+    rs.splice(1);
     return out;
   });
   console.log(r);
@@ -46,6 +55,11 @@ try {
   assert.equal(r.typed, 62207, 'the same money typed as something else parses as typed');
   assert.equal(r.sats, '62212');
   assert.equal(r.btc, '0.00062212');
+  assert.deepEqual(r.ring, [
+    ['btc', '0.00062212', '0.00000093', '', 'abc'],
+    ['fiat', '93.31', '0.13', '', 'abc'],
+    ['sats', '62212', '93', '', 'abc'],
+  ], 'a typed amount follows the unit around the ring and comes back exact; blanks and junk are left alone');
   assert.deepEqual(errors, []);
   console.log('✅ amount fills follow the display unit');
 } finally { await browser.close(); server.stop(true); }