feat: implement standalone closed page navigation and add related tests

web/components/kefu/close-navigation.test.mjs

@@ -0,0 +1,29 @@
+import assert from "node:assert/strict"
+import test from "node:test"
+import ts from "typescript"
+import { readFile } from "node:fs/promises"
+import vm from "node:vm"
+
+async function loadCloseNavigation() {
+  const source = await readFile(new URL("./close-navigation.ts", import.meta.url), "utf8")
+  const compiled = ts.transpileModule(source, {
+    compilerOptions: {
+      target: ts.ScriptTarget.ES2017,
+      module: ts.ModuleKind.CommonJS,
+    },
+    fileName: "close-navigation.ts",
+  })
+  const sandbox = {
+    exports: {},
+    module: { exports: {} },
+  }
+  sandbox.exports = sandbox.module.exports
+  vm.runInNewContext(compiled.outputText, sandbox)
+  return sandbox.module.exports
+}
+
+test("standalone close navigates to the non-bootstrapping closed page", async () => {
+  const { getStandaloneClosedUrl } = await loadCloseNavigation()
+
+  assert.equal(getStandaloneClosedUrl(), "/kefu/closed")
+})