1 files changed, 92 insertions, 0 deletions
diff --git a/devtools/client/shared/test/browser_graphs-10b.js b/devtools/client/shared/test/browser_graphs-10b.js
new file mode 100644
index 0000000000..dff87a90e7
--- /dev/null
+++ b/devtools/client/shared/test/browser_graphs-10b.js
@@ -0,0 +1,92 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+"use strict";
+
+// Tests that graphs aren't refreshed when the owner window resizes but
+// the graph dimensions stay the same.
+
+const TEST_DATA = [
+  { delta: 112, value: 48 },
+  { delta: 213, value: 59 },
+  { delta: 313, value: 60 },
+  { delta: 413, value: 59 },
+  { delta: 530, value: 59 },
+  { delta: 646, value: 58 },
+  { delta: 747, value: 60 },
+  { delta: 863, value: 48 },
+  { delta: 980, value: 37 },
+  { delta: 1097, value: 30 },
+  { delta: 1213, value: 29 },
+  { delta: 1330, value: 23 },
+  { delta: 1430, value: 10 },
+  { delta: 1534, value: 17 },
+  { delta: 1645, value: 20 },
+  { delta: 1746, value: 22 },
+  { delta: 1846, value: 39 },
+  { delta: 1963, value: 26 },
+  { delta: 2080, value: 27 },
+  { delta: 2197, value: 35 },
+  { delta: 2312, value: 47 },
+  { delta: 2412, value: 53 },
+  { delta: 2514, value: 60 },
+  { delta: 2630, value: 37 },
+  { delta: 2730, value: 36 },
+  { delta: 2830, value: 37 },
+  { delta: 2946, value: 36 },
+  { delta: 3046, value: 40 },
+  { delta: 3163, value: 47 },
+  { delta: 3280, value: 41 },
+  { delta: 3380, value: 35 },
+  { delta: 3480, value: 27 },
+  { delta: 3580, value: 39 },
+  { delta: 3680, value: 42 },
+  { delta: 3780, value: 49 },
+  { delta: 3880, value: 55 },
+  { delta: 3980, value: 60 },
+  { delta: 4080, value: 60 },
+  { delta: 4180, value: 60 },
+];
+const LineGraphWidget = require("devtools/client/shared/widgets/LineGraphWidget");
+
+add_task(async function() {
+  await addTab("about:blank");
+  await performTest();
+  gBrowser.removeCurrentTab();
+});
+
+async function performTest() {
+  const { host, doc } = await createHost("window");
+  doc.body.setAttribute(
+    "style",
+    "position: fixed; width: 100%; height: 100%; margin: 0;"
+  );
+
+  const graph = new LineGraphWidget(doc.body, "fps");
+  graph.fixedWidth = 200;
+  graph.fixedHeight = 100;
+  await graph.once("ready");
+
+  let refreshCount = 0;
+  let refreshCancelledCount = 0;
+  graph.on("refresh", () => refreshCount++);
+  graph.on("refresh-cancelled", () => refreshCancelledCount++);
+
+  await testGraph(host, graph);
+
+  is(refreshCount, 0, "The graph shouldn't have been refreshed at all.");
+  is(refreshCancelledCount, 2, "The graph should've had 2 refresh attempts.");
+
+  await graph.destroy();
+  host.destroy();
+}
+
+async function testGraph(host, graph) {
+  graph.setData(TEST_DATA);
+
+  host._window.resizeBy(-100, -100);
+  await graph.once("refresh-cancelled");
+
+  host._window.resizeBy(100, 100);
+  await graph.once("refresh-cancelled");
+}