1 files changed, 34 insertions, 0 deletions
diff --git a/testing/mochitest/tests/Harness_sanity/test_SpecialPowersSpawnChrome.html b/testing/mochitest/tests/Harness_sanity/test_SpecialPowersSpawnChrome.html
new file mode 100644
index 0000000000..0281a251a7
--- /dev/null
+++ b/testing/mochitest/tests/Harness_sanity/test_SpecialPowersSpawnChrome.html
@@ -0,0 +1,34 @@
+<!DOCTYPE HTML>
+<html>
+<head>
+  <title>Test for SpecialPowers.spawnChrome</title>
+  <script src="/tests/SimpleTest/SimpleTest.js"></script>
+  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
+</head>
+<body>
+
+<script>
+/* eslint-disable prettier/prettier */
+
+  add_task(async function() {
+    let { browsingContextId, innerWindowId } = await SpecialPowers.spawnChrome([12, { b: 42 }], (a, b) => {
+      Assert.equal(a, 12, "Arg 1");
+      Assert.equal(b.b, 42, "Arg 2");
+
+      Assert.equal(Services.appinfo.processType,
+                   Services.appinfo.PROCESS_TYPE_DEFAULT,
+                   "Task runs in correct process");
+
+      return {
+        browsingContextId: browsingContext.id,
+        innerWindowId: windowGlobalParent.innerWindowId,
+      };
+    });
+
+    let wgc = SpecialPowers.wrap(window).windowGlobalChild;
+    is(browsingContextId, wgc.browsingContext.id, "Correct browsing context id");
+    is(innerWindowId, wgc.innerWindowId, "Correct inner window id");
+  });
+</script>
+</body>
+</html>