1 files changed, 38 insertions, 0 deletions
diff --git a/devtools/shared/tests/xpcshell/test_require_lazy.js b/devtools/shared/tests/xpcshell/test_require_lazy.js
new file mode 100644
index 0000000000..deba7e2128
--- /dev/null
+++ b/devtools/shared/tests/xpcshell/test_require_lazy.js
@@ -0,0 +1,38 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+"use strict";
+
+const { loader } = ChromeUtils.importESModule(
+  "resource://devtools/shared/loader/Loader.sys.mjs"
+);
+// Test devtools.lazyRequireGetter
+
+function run_test() {
+  const name = "asyncUtils";
+  const path = "devtools/shared/async-utils";
+  const o = {};
+  loader.lazyRequireGetter(o, name, path);
+  const asyncUtils = require(path);
+  // XXX: do_check_eq only works on primitive types, so we have this
+  // do_check_true of an equality expression.
+  Assert.ok(o.asyncUtils === asyncUtils);
+
+  // A non-main loader should get a new object via |lazyRequireGetter|, just
+  // as it would via a direct |require|.
+  const o2 = {};
+  const loader2 = new DevToolsLoader();
+
+  // We have to init the loader by loading any module before
+  // lazyRequireGetter is available
+  loader2.require("resource://devtools/shared/DevToolsUtils.js");
+
+  loader2.lazyRequireGetter(o2, name, path);
+  Assert.ok(o2.asyncUtils !== asyncUtils);
+
+  // A module required via a non-main loader that then uses |lazyRequireGetter|
+  // should also get the same object from that non-main loader.
+  const exposeLoader = loader2.require("xpcshell-test/exposeLoader");
+  const o3 = exposeLoader.exerciseLazyRequire(name, path);
+  Assert.ok(o3.asyncUtils === o2.asyncUtils);
+}