1 files changed, 92 insertions, 0 deletions
diff --git a/devtools/client/inspector/test/browser_inspector_highlighter-measure_01.js b/devtools/client/inspector/test/browser_inspector_highlighter-measure_01.js
new file mode 100644
index 0000000000..6155cec2d7
--- /dev/null
+++ b/devtools/client/inspector/test/browser_inspector_highlighter-measure_01.js
@@ -0,0 +1,92 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+"use strict";
+
+const TEST_URL = `data:text/html;charset=utf-8,
+                    <div style='
+                        position:absolute;
+                        left: 0;
+                        top: 0;
+                        width: 40000px;
+                        height: 8000px'>
+                    </div>`;
+
+const PREFIX = "measuring-tool-";
+const HIGHLIGHTER_TYPE = "MeasuringToolHighlighter";
+
+const X = 32;
+const Y = 20;
+
+add_task(async function () {
+  const helper = await openInspectorForURL(TEST_URL).then(
+    getHighlighterHelperFor(HIGHLIGHTER_TYPE)
+  );
+
+  const { finalize } = helper;
+
+  helper.prefix = PREFIX;
+
+  await isHiddenByDefault(helper);
+  await areLabelsHiddenByDefaultWhenShows(helper);
+  await areLabelsProperlyDisplayedWhenMouseMoved(helper);
+
+  await finalize();
+});
+
+async function isHiddenByDefault({ isElementHidden }) {
+  info("Checking the highlighter is hidden by default");
+
+  let hidden = await isElementHidden("root");
+  ok(hidden, "highlighter's root is hidden by default");
+
+  hidden = await isElementHidden("label-size");
+  ok(hidden, "highlighter's label size is hidden by default");
+
+  hidden = await isElementHidden("label-position");
+  ok(hidden, "highlighter's label position is hidden by default");
+}
+
+async function areLabelsHiddenByDefaultWhenShows({ isElementHidden, show }) {
+  info("Checking the highlighter is displayed when asked");
+
+  await show();
+
+  let hidden = await isElementHidden("elements");
+  is(hidden, false, "highlighter is visible after show");
+
+  hidden = await isElementHidden("label-size");
+  ok(hidden, "label's size still hidden");
+
+  hidden = await isElementHidden("label-position");
+  ok(hidden, "label's position still hidden");
+}
+
+async function areLabelsProperlyDisplayedWhenMouseMoved({
+  isElementHidden,
+  synthesizeMouse,
+  getElementTextContent,
+}) {
+  info("Checking labels are properly displayed when mouse moved");
+
+  await synthesizeMouse({
+    selector: ":root",
+    options: { type: "mousemove" },
+    x: X,
+    y: Y,
+  });
+
+  let hidden = await isElementHidden("label-position");
+  is(hidden, false, "label's position is displayed after the mouse is moved");
+
+  hidden = await isElementHidden("label-size");
+  ok(hidden, "label's size still hidden");
+
+  const text = await getElementTextContent("label-position");
+
+  const [x, y] = text.replace(/ /g, "").split(/\n/);
+
+  is(+x, X, "label's position shows the proper X coord");
+  is(+y, Y, "label's position shows the proper Y coord");
+}