1 files changed, 28 insertions, 0 deletions
diff --git a/devtools/client/memory/test/unit/test_action-toggle-inverted.js b/devtools/client/memory/test/unit/test_action-toggle-inverted.js
new file mode 100644
index 000000000..665e5d822
--- /dev/null
+++ b/devtools/client/memory/test/unit/test_action-toggle-inverted.js
@@ -0,0 +1,28 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+"use strict";
+
+// Test toggling the top level inversion state of the tree.
+
+const { censusDisplays } = require("devtools/client/memory/constants");
+const { setCensusDisplay } = require("devtools/client/memory/actions/census-display");
+
+function run_test() {
+  run_next_test();
+}
+
+add_task(function* () {
+  let store = Store();
+  const { getState, dispatch } = store;
+
+  dispatch(setCensusDisplay(censusDisplays.allocationStack));
+  equal(getState().censusDisplay.inverted, false,
+        "not inverted initially");
+
+  dispatch(setCensusDisplay(censusDisplays.invertedAllocationStack));
+  equal(getState().censusDisplay.inverted, true, "now inverted after toggling");
+
+  dispatch(setCensusDisplay(censusDisplays.allocationStack));
+  equal(getState().censusDisplay.inverted, false,
+        "not inverted again after toggling again");
+});