1 files changed, 186 insertions, 0 deletions
diff --git a/devtools/client/memory/test/xpcshell/test_action-set-display-and-refresh-01.js b/devtools/client/memory/test/xpcshell/test_action-set-display-and-refresh-01.js
new file mode 100644
index 0000000000..6f1332c339
--- /dev/null
+++ b/devtools/client/memory/test/xpcshell/test_action-set-display-and-refresh-01.js
@@ -0,0 +1,186 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+"use strict";
+
+/**
+ * Tests the task creator `setCensusDisplayAndRefreshAndRefresh()` for display
+ * changing. We test this rather than `setCensusDisplayAndRefresh` directly, as
+ * we use the refresh action in the app itself composed from
+ * `setCensusDisplayAndRefresh`.
+ */
+
+const {
+  censusDisplays,
+  censusState,
+  viewState,
+} = require("resource://devtools/client/memory/constants.js");
+const {
+  setCensusDisplayAndRefresh,
+} = require("resource://devtools/client/memory/actions/census-display.js");
+const {
+  takeSnapshotAndCensus,
+  selectSnapshotAndRefresh,
+} = require("resource://devtools/client/memory/actions/snapshot.js");
+const {
+  changeView,
+} = require("resource://devtools/client/memory/actions/view.js");
+
+// We test setting an invalid display, which triggers an assertion failure.
+EXPECTED_DTU_ASSERT_FAILURE_COUNT = 1;
+
+add_task(async function () {
+  const front = new StubbedMemoryFront();
+  const heapWorker = new HeapAnalysesClient();
+  await front.attach();
+  const store = Store();
+  const { getState, dispatch } = store;
+
+  dispatch(changeView(viewState.CENSUS));
+
+  // Test default display with no snapshots
+  equal(
+    getState().censusDisplay.breakdown.by,
+    "coarseType",
+    "default coarseType display selected at start."
+  );
+  dispatch(
+    setCensusDisplayAndRefresh(heapWorker, censusDisplays.allocationStack)
+  );
+  equal(
+    getState().censusDisplay.breakdown.by,
+    "allocationStack",
+    "display changed with no snapshots"
+  );
+
+  // Test invalid displays
+  Assert.strictEqual(
+    getState().errors.length,
+    0,
+    "No error actions in the queue."
+  );
+  dispatch(setCensusDisplayAndRefresh(heapWorker, {}));
+  await waitUntilState(store, () => getState().errors.length === 1);
+  ok(true, "Emits an error action when passing in an invalid display object");
+
+  equal(
+    getState().censusDisplay.breakdown.by,
+    "allocationStack",
+    "current display unchanged when passing invalid display"
+  );
+
+  // Test new snapshots
+  dispatch(takeSnapshotAndCensus(front, heapWorker));
+  await waitUntilCensusState(store, snapshot => snapshot.census, [
+    censusState.SAVED,
+  ]);
+
+  equal(
+    getState().snapshots[0].census.display,
+    censusDisplays.allocationStack,
+    "New snapshot's census uses correct display"
+  );
+
+  // Updates when changing display during `SAVING`
+  dispatch(takeSnapshotAndCensus(front, heapWorker));
+  await waitUntilCensusState(store, snapshot => snapshot.census, [
+    censusState.SAVED,
+    censusState.SAVING,
+  ]);
+  dispatch(setCensusDisplayAndRefresh(heapWorker, censusDisplays.coarseType));
+  await waitUntilCensusState(store, snapshot => snapshot.census, [
+    censusState.SAVED,
+    censusState.SAVED,
+  ]);
+  equal(
+    getState().snapshots[1].census.display,
+    censusDisplays.coarseType,
+    "Changing display while saving a snapshot results " +
+      "in a census using the new display"
+  );
+
+  // Updates when changing display during `SAVING_CENSUS`
+  dispatch(takeSnapshotAndCensus(front, heapWorker));
+  await waitUntilCensusState(store, snapshot => snapshot.census, [
+    censusState.SAVED,
+    censusState.SAVED,
+    censusState.SAVING,
+  ]);
+  dispatch(
+    setCensusDisplayAndRefresh(heapWorker, censusDisplays.allocationStack)
+  );
+  await waitUntilCensusState(store, snapshot => snapshot.census, [
+    censusState.SAVED,
+    censusState.SAVED,
+    censusState.SAVED,
+  ]);
+  equal(
+    getState().snapshots[2].census.display,
+    censusDisplays.allocationStack,
+    "Display can be changed while saving census, stores updated display in snapshot"
+  );
+
+  // Updates census on currently selected snapshot when changing display
+  ok(getState().snapshots[2].selected, "Third snapshot currently selected");
+  dispatch(setCensusDisplayAndRefresh(heapWorker, censusDisplays.coarseType));
+  await waitUntilState(
+    store,
+    state => state.snapshots[2].census.state === censusState.SAVING
+  );
+  await waitUntilState(
+    store,
+    state => state.snapshots[2].census.state === censusState.SAVED
+  );
+  equal(
+    getState().snapshots[2].census.display,
+    censusDisplays.coarseType,
+    "Snapshot census updated when changing displays " +
+      "after already generating one census"
+  );
+
+  dispatch(
+    setCensusDisplayAndRefresh(heapWorker, censusDisplays.allocationStack)
+  );
+  await waitUntilState(
+    store,
+    state => state.snapshots[2].census.state === censusState.SAVED
+  );
+  equal(
+    getState().snapshots[2].census.display,
+    censusDisplays.allocationStack,
+    "Snapshot census updated when changing displays " +
+      "after already generating one census"
+  );
+
+  // Does not update unselected censuses.
+  ok(!getState().snapshots[1].selected, "Second snapshot selected currently");
+  equal(
+    getState().snapshots[1].census.display,
+    censusDisplays.coarseType,
+    "Second snapshot using `coarseType` display still and " +
+      "not yet updated to correct display"
+  );
+
+  // Updates to current display when switching to stale snapshot.
+  dispatch(selectSnapshotAndRefresh(heapWorker, getState().snapshots[1].id));
+  await waitUntilCensusState(store, snapshot => snapshot.census, [
+    censusState.SAVED,
+    censusState.SAVING,
+    censusState.SAVED,
+  ]);
+  await waitUntilCensusState(store, snapshot => snapshot.census, [
+    censusState.SAVED,
+    censusState.SAVED,
+    censusState.SAVED,
+  ]);
+
+  ok(getState().snapshots[1].selected, "Second snapshot selected currently");
+  equal(
+    getState().snapshots[1].census.display,
+    censusDisplays.allocationStack,
+    "Second snapshot using `allocationStack` display and updated to correct display"
+  );
+
+  heapWorker.destroy();
+  await front.detach();
+});