1 files changed, 47 insertions, 0 deletions
diff --git a/devtools/client/memory/test/browser/browser_memory_percents_01.js b/devtools/client/memory/test/browser/browser_memory_percents_01.js
new file mode 100644
index 000000000..c3ed37530
--- /dev/null
+++ b/devtools/client/memory/test/browser/browser_memory_percents_01.js
@@ -0,0 +1,47 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+// Sanity test that we calculate percentages in the tree.
+
+"use strict";
+
+const { takeSnapshotAndCensus } = require("devtools/client/memory/actions/snapshot");
+const { viewState } = require("devtools/client/memory/constants");
+const { changeView } = require("devtools/client/memory/actions/view");
+
+const TEST_URL = "http://example.com/browser/devtools/client/memory/test/browser/doc_steady_allocation.html";
+
+function checkCells(cells) {
+  ok(cells.length > 1, "Should have found some");
+  // Ignore the first header cell.
+  for (let cell of cells.slice(1)) {
+    const percent = cell.querySelector(".heap-tree-percent");
+    ok(percent, "should have a percent cell");
+    ok(percent.textContent.match(/^\d?\d%$/), "should be of the form nn% or n%");
+  }
+}
+
+this.test = makeMemoryTest(TEST_URL, function* ({ tab, panel }) {
+  const heapWorker = panel.panelWin.gHeapAnalysesClient;
+  const front = panel.panelWin.gFront;
+  const { getState, dispatch } = panel.panelWin.gStore;
+  const doc = panel.panelWin.document;
+
+  dispatch(changeView(viewState.CENSUS));
+
+  yield dispatch(takeSnapshotAndCensus(front, heapWorker));
+  is(getState().censusDisplay.breakdown.by, "coarseType",
+     "Should be using coarse type breakdown");
+
+  const bytesCells = [...doc.querySelectorAll(".heap-tree-item-bytes")];
+  checkCells(bytesCells);
+
+  const totalBytesCells = [...doc.querySelectorAll(".heap-tree-item-total-bytes")];
+  checkCells(totalBytesCells);
+
+  const countCells = [...doc.querySelectorAll(".heap-tree-item-count")];
+  checkCells(countCells);
+
+  const totalCountCells = [...doc.querySelectorAll(".heap-tree-item-total-count")];
+  checkCells(totalCountCells);
+});