1 files changed, 60 insertions, 0 deletions
diff --git a/devtools/shared/heapsnapshot/tests/xpcshell/test_HeapAnalyses_deleteHeapSnapshot_03.js b/devtools/shared/heapsnapshot/tests/xpcshell/test_HeapAnalyses_deleteHeapSnapshot_03.js
new file mode 100644
index 0000000000..c84622f633
--- /dev/null
+++ b/devtools/shared/heapsnapshot/tests/xpcshell/test_HeapAnalyses_deleteHeapSnapshot_03.js
@@ -0,0 +1,60 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+"use strict";
+
+// Test other dominatorTrees can still be retrieved after deleting a snapshot
+
+const breakdown = {
+  by: "coarseType",
+  objects: { by: "count", count: true, bytes: true },
+  scripts: { by: "count", count: true, bytes: true },
+  strings: { by: "count", count: true, bytes: true },
+  other: { by: "count", count: true, bytes: true },
+  domNode: { by: "count", count: true, bytes: true },
+};
+
+async function createSnapshotAndDominatorTree(client) {
+  const snapshotFilePath = saveNewHeapSnapshot();
+  await client.readHeapSnapshot(snapshotFilePath);
+  const dominatorTreeId = await client.computeDominatorTree(snapshotFilePath);
+  return { dominatorTreeId, snapshotFilePath };
+}
+
+add_task(async function () {
+  const client = new HeapAnalysesClient();
+
+  const savedSnapshots = [
+    await createSnapshotAndDominatorTree(client),
+    await createSnapshotAndDominatorTree(client),
+    await createSnapshotAndDominatorTree(client),
+  ];
+  ok(true, "Create 3 snapshots and dominator trees");
+
+  await client.deleteHeapSnapshot(savedSnapshots[1].snapshotFilePath);
+  ok(true, "Snapshot deleted");
+
+  let tree = await client.getDominatorTree({
+    dominatorTreeId: savedSnapshots[0].dominatorTreeId,
+    breakdown,
+  });
+  ok(tree, "Should get a valid tree for first snapshot");
+
+  let threw = false;
+  try {
+    await client.getDominatorTree({
+      dominatorTreeId: savedSnapshots[1].dominatorTreeId,
+      breakdown,
+    });
+  } catch (_) {
+    threw = true;
+  }
+  ok(threw, "getDominatorTree on a deleted snapshot should throw an error");
+
+  tree = await client.getDominatorTree({
+    dominatorTreeId: savedSnapshots[2].dominatorTreeId,
+    breakdown,
+  });
+  ok(tree, "Should get a valid tree for third snapshot");
+
+  client.destroy();
+});