import FIREFOX_52_6_0esr_RELEASE from mozilla-esr52 hg repo

devtools/client/shared/test/browser_flame-graph-01.js

@@ -0,0 +1,61 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+"use strict";
+
+// Tests that flame graph widget works properly.
+
+const {FlameGraph} = require("devtools/client/shared/widgets/FlameGraph");
+
+add_task(function* () {
+  yield addTab("about:blank");
+  yield performTest();
+  gBrowser.removeCurrentTab();
+});
+
+function* performTest() {
+  let [host,, doc] = yield createHost();
+  doc.body.setAttribute("style",
+                        "position: fixed; width: 100%; height: 100%; margin: 0;");
+
+  let graph = new FlameGraph(doc.body);
+
+  let readyEventEmitted;
+  graph.once("ready", () => {
+    readyEventEmitted = true;
+  });
+
+  yield graph.ready();
+  ok(readyEventEmitted, "The 'ready' event should have been emitted");
+
+  testGraph(host, graph);
+
+  yield graph.destroy();
+  host.destroy();
+}
+
+function testGraph(host, graph) {
+  ok(graph._container.classList.contains("flame-graph-widget-container"),
+    "The correct graph container was created.");
+  ok(graph._canvas.classList.contains("flame-graph-widget-canvas"),
+    "The correct graph container was created.");
+
+  let bounds = host.frame.getBoundingClientRect();
+
+  is(graph.width, bounds.width * window.devicePixelRatio,
+    "The graph has the correct width.");
+  is(graph.height, bounds.height * window.devicePixelRatio,
+    "The graph has the correct height.");
+
+  ok(graph._selection.start === null,
+    "The graph's selection start value is initially null.");
+  ok(graph._selection.end === null,
+    "The graph's selection end value is initially null.");
+
+  ok(graph._selectionDragger.origin === null,
+    "The graph's dragger origin value is initially null.");
+  ok(graph._selectionDragger.anchor.start === null,
+    "The graph's dragger anchor start value is initially null.");
+  ok(graph._selectionDragger.anchor.end === null,
+    "The graph's dragger anchor end value is initially null.");
+}