1 files changed, 20 insertions, 0 deletions
diff --git a/dom/base/test/browser_data_documents_aboutmemory.js b/dom/base/test/browser_data_documents_aboutmemory.js
new file mode 100644
index 0000000000..79bc64939d
--- /dev/null
+++ b/dom/base/test/browser_data_documents_aboutmemory.js
@@ -0,0 +1,20 @@
+add_task(async function () {
+  const doc = new DOMParser().parseFromString("<p>dadada</p>", "text/html");
+
+  let mgr = Cc["@mozilla.org/memory-reporter-manager;1"].getService(
+    Ci.nsIMemoryReporterManager
+  );
+
+  let amount = 0;
+  const handleReport = (aProcess, aPath, aKind, aUnits, aAmount) => {
+    const regex = new RegExp(".*/window-objects/.*/data-documents/.*");
+    if (regex.test(aPath)) {
+      amount += aAmount;
+    }
+  };
+
+  await new Promise(r =>
+    mgr.getReports(handleReport, null, r, null, /* anonymized = */ false)
+  );
+  Assert.greater(amount, 0, "Got data documents amount");
+});