1 files changed, 72 insertions, 0 deletions
diff --git a/devtools/client/memory/test/unit/test_utils-get-snapshot-totals.js b/devtools/client/memory/test/unit/test_utils-get-snapshot-totals.js
new file mode 100644
index 000000000..c4560fb07
--- /dev/null
+++ b/devtools/client/memory/test/unit/test_utils-get-snapshot-totals.js
@@ -0,0 +1,72 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+"use strict";
+
+/**
+ * Tests that we use the correct snapshot aggregate value
+ * in `utils.getSnapshotTotals(snapshot)`
+ */
+
+const { censusDisplays, snapshotState: states, viewState, censusState } = require("devtools/client/memory/constants");
+const { getSnapshotTotals } = require("devtools/client/memory/utils");
+const { takeSnapshotAndCensus } = require("devtools/client/memory/actions/snapshot");
+const { setCensusDisplayAndRefresh } = require("devtools/client/memory/actions/census-display");
+const { changeView } = require("devtools/client/memory/actions/view");
+
+function run_test() {
+  run_next_test();
+}
+
+add_task(function* () {
+  let front = new StubbedMemoryFront();
+  let heapWorker = new HeapAnalysesClient();
+  yield front.attach();
+  let store = Store();
+  let { getState, dispatch } = store;
+
+  dispatch(changeView(viewState.CENSUS));
+
+  yield dispatch(setCensusDisplayAndRefresh(heapWorker,
+                                            censusDisplays.allocationStack));
+
+  dispatch(takeSnapshotAndCensus(front, heapWorker));
+  yield waitUntilCensusState(store, s => s.census, [censusState.SAVED]);
+
+  ok(!getState().snapshots[0].census.display.inverted, "Snapshot is not inverted");
+
+  let census = getState().snapshots[0].census;
+  let result = aggregate(census.report);
+  let totalBytes = result.bytes;
+  let totalCount = result.count;
+
+  ok(totalBytes > 0, "counted up bytes in the census");
+  ok(totalCount > 0, "counted up count in the census");
+
+  result = getSnapshotTotals(getState().snapshots[0].census);
+  equal(totalBytes, result.bytes, "getSnapshotTotals reuslted in correct bytes");
+  equal(totalCount, result.count, "getSnapshotTotals reuslted in correct count");
+
+  dispatch(setCensusDisplayAndRefresh(heapWorker,
+                                      censusDisplays.invertedAllocationStack));
+
+  yield waitUntilCensusState(store, s => s.census, [censusState.SAVING]);
+  yield waitUntilCensusState(store, s => s.census, [censusState.SAVED]);
+  ok(getState().snapshots[0].census.display.inverted, "Snapshot is inverted");
+
+  result = getSnapshotTotals(getState().snapshots[0].census);
+  equal(totalBytes, result.bytes,
+        "getSnapshotTotals reuslted in correct bytes when inverted");
+  equal(totalCount, result.count,
+        "getSnapshotTotals reuslted in correct count when inverted");
+});
+
+function aggregate(report) {
+  let totalBytes = report.bytes;
+  let totalCount = report.count;
+  for (let child of (report.children || [])) {
+    let { bytes, count } = aggregate(child);
+    totalBytes += bytes;
+    totalCount += count;
+  }
+  return { bytes: totalBytes, count: totalCount };
+}