Add JamesDSP playback controls and verification harness

frontend/jamesdsp-app.test.js

@@ -2,8 +2,18 @@ const { test } = require('node:test');
 const assert = require('node:assert/strict');
 const { readFileSync } = require('node:fs');
 const { join } = require('node:path');
+const vm = require('node:vm');
 
 const app = readFileSync(join(__dirname, 'app.js'), 'utf8');
+const views = readFileSync(join(__dirname, 'views-core.js'), 'utf8');
+
+function parsePreset(text) {
+  const declaration = views.match(/function parseJamesDspPreset\(text\) \{[\s\S]*?\n\}/)?.[0];
+  assert.ok(declaration, 'preset parser is present');
+  const context = vm.createContext({});
+  vm.runInContext(`${declaration}; globalThis.parse = parseJamesDspPreset;`, context);
+  return context.parse(text);
+}
 
 test('the persisted engine is Standard by default and upgrades missing JamesDSP settings safely', () => {
   assert.match(app, /jamesDsp: \{ enabled: false, preset: 'flat', params: \{\} \}/);
@@ -27,4 +37,23 @@ test('EQ creates no second context or element source and passes Standard fallbac
   assert.match(app, /standardInput: st\.filters\[0\]/);
   assert.match(app, /dspController\.setLevelDb\(st\.levelDb\)/);
   assert.match(app, /if \(data\.settings\.jamesDsp\?\.enabled\) \{[\s\S]{0,450}startDsp\(\)/);
+  assert.match(app, /request !== dspRequest \|\| !data\.settings\.jamesDsp\?\.enabled/);
+});
+
+test('Playback settings expose persisted presets, bands, safe import/export, IR, and A/B bypass', () => {
+  assert.match(views, /sel\('setSoundEngine'/);
+  assert.match(views, /sel\('setDspPreset'/);
+  for (const id of ['setDspCompressor', 'dspPresetImportBtn', 'dspPresetExportBtn', 'dspResetBtn', 'dspIrFile']) assert.ok(views.includes(`id="${id}"`), id);
+  assert.match(views, /\[25, 40, 63, 100, 160, 250, 400, 630, 1000, 1600, 2500, 4000, 6300, 10000, 16000\]/);
+  assert.match(views, /imported\?\.texts/);
+  assert.doesNotMatch(views, /liveprog|ddc|arbitrary/);
+  assert.match(app, /Bypass JamesDSP/);
+  assert.match(app, /toggleDspBypass/);
+});
+
+test('preset import validates ranges and excludes text-effect parameters', () => {
+  assert.deepEqual(JSON.parse(JSON.stringify(parsePreset(JSON.stringify({ version: 1, preset: 'warm', params: { 'eq.band0': 3, 'bass.enabled': 1 } })))), { preset: 'warm', params: { 'eq.band0': 3, 'bass.enabled': 1 } });
+  assert.throws(() => parsePreset({ version: 1, preset: 'flat', params: { 'liveprog.enabled': 1 } }), /text effects are disabled|Unsupported preset setting/);
+  assert.throws(() => parsePreset({ version: 1, params: { 'eq.band0': 50 } }), /Unsupported preset setting/);
+  assert.throws(() => parsePreset({ version: 1, texts: { effect: 'unsafe' }, params: {} }), /text effects are disabled/);
 });