1 files changed, 99 insertions, 0 deletions
diff --git a/devtools/client/performance/test/helpers/synth-utils.js b/devtools/client/performance/test/helpers/synth-utils.js
new file mode 100644
index 000000000..d4631a3f1
--- /dev/null
+++ b/devtools/client/performance/test/helpers/synth-utils.js
@@ -0,0 +1,99 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+"use strict";
+
+/**
+ * Generates a generalized profile with some samples.
+ */
+exports.synthesizeProfile = () => {
+  const { CATEGORY_MASK } = require("devtools/client/performance/modules/categories");
+  const RecordingUtils = require("devtools/shared/performance/recording-utils");
+
+  return RecordingUtils.deflateProfile({
+    meta: { version: 2 },
+    threads: [{
+      samples: [{
+        time: 1,
+        frames: [
+          { category: CATEGORY_MASK("other"), location: "(root)" },
+          { category: CATEGORY_MASK("other"), location: "A (http://foo/bar/baz:12)" },
+          { category: CATEGORY_MASK("css"), location: "B (http://foo/bar/baz:34)" },
+          { category: CATEGORY_MASK("js"), location: "C (http://foo/bar/baz:56)" }
+        ]
+      }, {
+        time: 1 + 1,
+        frames: [
+          { category: CATEGORY_MASK("other"), location: "(root)" },
+          { category: CATEGORY_MASK("other"), location: "A (http://foo/bar/baz:12)" },
+          { category: CATEGORY_MASK("css"), location: "B (http://foo/bar/baz:34)" },
+          { category: CATEGORY_MASK("gc", 1), location: "D (http://foo/bar/baz:78:9)" }
+        ]
+      }, {
+        time: 1 + 1 + 2,
+        frames: [
+          { category: CATEGORY_MASK("other"), location: "(root)" },
+          { category: CATEGORY_MASK("other"), location: "A (http://foo/bar/baz:12)" },
+          { category: CATEGORY_MASK("css"), location: "B (http://foo/bar/baz:34)" },
+          { category: CATEGORY_MASK("gc", 1), location: "D (http://foo/bar/baz:78:9)" }
+        ]
+      }, {
+        time: 1 + 1 + 2 + 3,
+        frames: [
+          { category: CATEGORY_MASK("other"), location: "(root)" },
+          { category: CATEGORY_MASK("other"), location: "A (http://foo/bar/baz:12)" },
+          { category: CATEGORY_MASK("gc", 2), location: "E (http://foo/bar/baz:90)" },
+          { category: CATEGORY_MASK("network"), location: "F (http://foo/bar/baz:99)" }
+        ]
+      }]
+    }]
+  });
+};
+
+/**
+ * Generates a simple implementation for a tree class.
+ */
+exports.synthesizeCustomTreeClass = () => {
+  const { Cu } = require("chrome");
+  const { AbstractTreeItem } = Cu.import("resource://devtools/client/shared/widgets/AbstractTreeItem.jsm", {});
+  const { Heritage } = require("devtools/client/shared/widgets/view-helpers");
+
+  function MyCustomTreeItem(dataSrc, properties) {
+    AbstractTreeItem.call(this, properties);
+    this.itemDataSrc = dataSrc;
+  }
+
+  MyCustomTreeItem.prototype = Heritage.extend(AbstractTreeItem.prototype, {
+    _displaySelf: function (document, arrowNode) {
+      let node = document.createElement("hbox");
+      node.style.marginInlineStart = (this.level * 10) + "px";
+      node.appendChild(arrowNode);
+      node.appendChild(document.createTextNode(this.itemDataSrc.label));
+      return node;
+    },
+
+    _populateSelf: function (children) {
+      for (let childDataSrc of this.itemDataSrc.children) {
+        children.push(new MyCustomTreeItem(childDataSrc, {
+          parent: this,
+          level: this.level + 1
+        }));
+      }
+    }
+  });
+
+  const myDataSrc = {
+    label: "root",
+    children: [{
+      label: "foo",
+      children: []
+    }, {
+      label: "bar",
+      children: [{
+        label: "baz",
+        children: []
+      }]
+    }]
+  };
+
+  return { MyCustomTreeItem, myDataSrc };
+};