1 files changed, 18 insertions, 0 deletions
diff --git a/tools/ts/tests/xpcom.test.js b/tools/ts/tests/xpcom.test.js
new file mode 100644
index 0000000000..bdea3e843e
--- /dev/null
+++ b/tools/ts/tests/xpcom.test.js
@@ -0,0 +1,18 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+/* eslint-env node, jest */
+"use strict";
+
+const fs = require("fs");
+const path = require("path");
+const { ts_link } = require("../build_xpcom.js");
+
+const test_dts = path.join(__dirname, "../fixtures/xpctest.d.ts");
+const dir = path.join(__dirname, "../../../xpcom/idl-parser/xpidl/fixtures/");
+const files = ["xpctest.d.json"];
+
+test("xpctest.d.json produces expected baseline d.ts", () => {
+  let dts = ts_link(dir, files).join("\n");
+  expect(dts).toEqual(fs.readFileSync(test_dts, "utf8"));
+});