1 files changed, 52 insertions, 0 deletions
diff --git a/dom/heapsnapshot/tests/unit/test_HeapAnalyses_takeCensus_07.js b/dom/heapsnapshot/tests/unit/test_HeapAnalyses_takeCensus_07.js
new file mode 100644
index 0000000000..986b3aaa80
--- /dev/null
+++ b/dom/heapsnapshot/tests/unit/test_HeapAnalyses_takeCensus_07.js
@@ -0,0 +1,52 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+// Test that the HeapAnalyses{Client,Worker} can take censuses and return
+// an inverted CensusTreeNode.
+
+function run_test() {
+  run_next_test();
+}
+
+const BREAKDOWN = {
+  by: "coarseType",
+  objects: {
+    by: "objectClass",
+    then: { by: "count", count: true, bytes: true },
+    other: { by: "count", count: true, bytes: true },
+  },
+  scripts: {
+    by: "internalType",
+    then: { by: "count", count: true, bytes: true },
+  },
+  strings: {
+    by: "internalType",
+    then: { by: "count", count: true, bytes: true },
+  },
+  other: {
+    by: "internalType",
+    then: { by: "count", count: true, bytes: true },
+  },
+};
+
+add_task(function* () {
+  const client = new HeapAnalysesClient();
+
+  const snapshotFilePath = saveNewHeapSnapshot();
+  yield client.readHeapSnapshot(snapshotFilePath);
+  ok(true, "Should have read the heap snapshot");
+
+  const { report } = yield client.takeCensus(snapshotFilePath, {
+    breakdown: BREAKDOWN
+  });
+
+  const { report: treeNode } = yield client.takeCensus(snapshotFilePath, {
+    breakdown: BREAKDOWN
+  }, {
+    asInvertedTreeNode: true
+  });
+
+  compareCensusViewData(BREAKDOWN, report, treeNode, { invert: true });
+
+  client.destroy();
+});