diff options
Diffstat (limited to 'dom/heapsnapshot/tests/unit/test_HeapSnapshot_describeNode_01.js')
-rw-r--r-- | dom/heapsnapshot/tests/unit/test_HeapSnapshot_describeNode_01.js | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/dom/heapsnapshot/tests/unit/test_HeapSnapshot_describeNode_01.js b/dom/heapsnapshot/tests/unit/test_HeapSnapshot_describeNode_01.js new file mode 100644 index 000000000..d79cb5a7b --- /dev/null +++ b/dom/heapsnapshot/tests/unit/test_HeapSnapshot_describeNode_01.js @@ -0,0 +1,42 @@ +/* Any copyright is dedicated to the Public Domain. + http://creativecommons.org/publicdomain/zero/1.0/ */ + +// Test that we can describe nodes with a breakdown. + +function run_test() { + const path = saveNewHeapSnapshot(); + const snapshot = ChromeUtils.readHeapSnapshot(path); + ok(snapshot.describeNode); + equal(typeof snapshot.describeNode, "function"); + + const dt = snapshot.computeDominatorTree(); + + let threw = false; + try { + snapshot.describeNode(undefined, dt.root); + } catch (_) { + threw = true; + } + ok(threw, "Should require a breakdown"); + + const breakdown = { + by: "coarseType", + objects: { by: "objectClass" }, + scripts: { by: "internalType" }, + strings: { by: "internalType" }, + other: { by: "internalType" } + }; + + threw = false; + try { + snapshot.describeNode(breakdown, 0); + } catch (_) { + threw = true; + } + ok(threw, "Should throw when given an invalid node id"); + + const description = snapshot.describeNode(breakdown, dt.root); + ok(description); + ok(description.other); + ok(description.other["JS::ubi::RootList"]); +} |