const test=require('node:test'),assert=require('node:assert/strict');
const {leadingGlyph}=require('./glass-controls.js');
test('glass icon substitution preserves leading whitespace and remaining labels',()=>{
 assert.deepEqual(leadingGlyph('  ⬇ Save'),{kind:'save',original:'  ⬇',rest:' Save'});
 assert.deepEqual(leadingGlyph('⚙️ Settings'),{kind:'settings',original:'⚙️',rest:' Settings'});
 assert.equal(leadingGlyph('A song with 🔍 in its title'),null);
 assert.equal(leadingGlyph('Clear all'),null);
 assert.equal(leadingGlyph('⏸').kind,'pause');
});