Add shell plugin model tests

test/shell.d/emojis-test.sh

@@ -0,0 +1,47 @@
+#!/bin/bash
+
+set -euo pipefail
+
+source "$(cd -- "$(dirname -- "${BASH_SOURCE[0]}")" && pwd)/base-test.sh"
+
+run_node_test <<'JS'
+const fs = require('fs')
+const emojis = requireFromRoot('shell/plugins/emojis/EmojiSearch.js')
+
+const raw = fs.readFileSync(path.join(root, 'shell/plugins/emojis/emojis.json'), 'utf8')
+const data = emojis.parseEmojis(raw)
+
+assert(data.length > 1000, 'emoji dataset parses')
+assertDeepEqual(emojis.parseEmojis('{'), [], 'invalid emoji JSON parses as empty list')
+assertDeepEqual(emojis.parseEmojis('{"e":"nope"}'), [], 'non-array emoji JSON parses as empty list')
+
+const fixture = [
+  { e: 'a', k: 'grinning face smile happy' },
+  { e: 'b', k: 'face with tears of joy joy tears' },
+  { e: 'c', k: 'flag: united states us america' }
+]
+
+assertDeepEqual(
+  emojis.filterEmojis(fixture, '  JOY  ').map(item => item.e),
+  ['b'],
+  'emoji filtering trims and lowercases query'
+)
+
+assertDeepEqual(
+  emojis.filterEmojis(fixture, '', 2).map(item => item.e),
+  ['a', 'b'],
+  'emoji filtering honors result limit'
+)
+
+assertDeepEqual(
+  emojis.filterEmojis(fixture, '', 0),
+  [],
+  'emoji filtering supports zero result limit'
+)
+
+assertEqual(
+  emojis.filterEmojis(data, 'face with tears')[0].e,
+  '\u{1F602}',
+  'emoji filtering finds face with tears of joy'
+)
+JS