1 files changed, 57 insertions, 0 deletions
diff --git a/devtools/shared/heapsnapshot/tests/xpcshell/test_HeapAnalyses_takeCensus_07.js b/devtools/shared/heapsnapshot/tests/xpcshell/test_HeapAnalyses_takeCensus_07.js
new file mode 100644
index 0000000000..3f603122d3
--- /dev/null
+++ b/devtools/shared/heapsnapshot/tests/xpcshell/test_HeapAnalyses_takeCensus_07.js
@@ -0,0 +1,57 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+"use strict";
+
+// Test that the HeapAnalyses{Client,Worker} can take censuses and return
+// an inverted CensusTreeNode.
+
+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 },
+  },
+  domNode: {
+    by: "descriptiveType",
+    then: { by: "count", count: true, bytes: true },
+  },
+};
+
+add_task(async function () {
+  const client = new HeapAnalysesClient();
+
+  const snapshotFilePath = saveNewHeapSnapshot();
+  await client.readHeapSnapshot(snapshotFilePath);
+  ok(true, "Should have read the heap snapshot");
+
+  const { report } = await client.takeCensus(snapshotFilePath, {
+    breakdown: BREAKDOWN,
+  });
+
+  const { report: treeNode } = await client.takeCensus(
+    snapshotFilePath,
+    {
+      breakdown: BREAKDOWN,
+    },
+    {
+      asInvertedTreeNode: true,
+    }
+  );
+
+  compareCensusViewData(BREAKDOWN, report, treeNode, { invert: true });
+
+  client.destroy();
+});