Show the desktop shell in Chinese under zh_CN

test/shell.d/shell-i18n-test.sh

@@ -0,0 +1,42 @@
+#!/bin/bash
+
+set -euo pipefail
+
+source "$(cd -- "$(dirname -- "${BASH_SOURCE[0]}")" && pwd)/base-test.sh"
+
+run_node_test <<'JS'
+const fs = require('fs')
+const vm = require('vm')
+
+const source = fs.readFileSync(path.join(root, 'shell/Commons/I18nZh.js'), 'utf8').replace('.pragma library', '')
+const context = {}
+vm.runInNewContext(source + '\nthis.table = table', context)
+const table = context.table
+
+const files = []
+const walk = dir => {
+  for (const entry of fs.readdirSync(dir, { withFileTypes: true })) {
+    const full = path.join(dir, entry.name)
+    if (entry.isDirectory()) walk(full)
+    else if (/\.(qml|js)$/.test(entry.name)) files.push(full)
+  }
+}
+walk(path.join(root, 'shell'))
+
+const missing = []
+let calls = 0
+for (const file of files) {
+  const text = fs.readFileSync(file, 'utf8')
+  for (const match of text.matchAll(/I18n\.tr\(\s*"((?:[^"\\]|\\.)*)"/g)) {
+    calls++
+    const key = JSON.parse('"' + match[1] + '"')
+    if (!(key in table)) missing.push(`${path.relative(root, file)}: ${key}`)
+  }
+}
+assert(calls > 300, 'the shell routes its text through I18n.tr', `found ${calls} calls`)
+assert(missing.length === 0, 'every I18n.tr text has a Chinese entry', missing.join('\n'))
+
+const placeholders = s => (s.match(/%\d/g) || []).sort().join(',')
+const mismatched = Object.keys(table).filter(key => placeholders(key) !== placeholders(table[key]))
+assert(mismatched.length === 0, 'every Chinese entry keeps its English placeholders', mismatched.join('\n'))
+JS