1 files changed, 31 insertions, 0 deletions
diff --git a/dom/heapsnapshot/tests/unit/test_HeapAnalyses_getDominatorTree_02.js b/dom/heapsnapshot/tests/unit/test_HeapAnalyses_getDominatorTree_02.js
new file mode 100644
index 000000000..fd29beece
--- /dev/null
+++ b/dom/heapsnapshot/tests/unit/test_HeapAnalyses_getDominatorTree_02.js
@@ -0,0 +1,31 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+// Test the HeapAnalyses{Client,Worker} "getDominatorTree" request with bad
+// dominator tree ids.
+
+function run_test() {
+  run_next_test();
+}
+
+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 },
+};
+
+add_task(function* () {
+  const client = new HeapAnalysesClient();
+
+  let threw = false;
+  try {
+    yield client.getDominatorTree({ dominatorTreeId: 42, breakdown });
+  } catch (_) {
+    threw = true;
+  }
+  ok(threw, "should throw when given a bad id");
+
+  client.destroy();
+});