1 files changed, 118 insertions, 0 deletions
diff --git a/remote/cdp/test/browser/page/browser_getLayoutMetrics.js b/remote/cdp/test/browser/page/browser_getLayoutMetrics.js
new file mode 100644
index 0000000000..db8b3e8f3c
--- /dev/null
+++ b/remote/cdp/test/browser/page/browser_getLayoutMetrics.js
@@ -0,0 +1,118 @@
+/* Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/publicdomain/zero/1.0/ */
+
+"use strict";
+
+add_task(async function documentSmallerThanViewport({ client }) {
+  const { Page } = client;
+  await loadURL(toDataURL("<div>Hello world"));
+
+  const { contentSize, layoutViewport } = await Page.getLayoutMetrics();
+  await checkContentSize(contentSize);
+  await checkLayoutViewport(layoutViewport);
+
+  is(
+    contentSize.x,
+    layoutViewport.pageX,
+    "X position of content is equal to layout viewport"
+  );
+  is(
+    contentSize.y,
+    layoutViewport.pageY,
+    "Y position of content is equal to layout viewport"
+  );
+  ok(
+    contentSize.width <= layoutViewport.clientWidth,
+    "Width of content is smaller than the layout viewport"
+  );
+  ok(
+    contentSize.height <= layoutViewport.clientHeight,
+    "Height of content is smaller than the layout viewport"
+  );
+});
+
+add_task(async function documentLargerThanViewport({ client }) {
+  const { Page } = client;
+  await loadURL(toDataURL("<div style='margin: 150vh 0 0 150vw'>Hello world"));
+
+  const { contentSize, layoutViewport } = await Page.getLayoutMetrics();
+  await checkContentSize(contentSize);
+  await checkLayoutViewport(layoutViewport, { scrollbars: true });
+
+  is(
+    contentSize.x,
+    layoutViewport.pageX,
+    "X position of content is equal to layout viewport"
+  );
+  is(
+    contentSize.y,
+    layoutViewport.pageY,
+    "Y position of content is equal to layout viewport"
+  );
+  ok(
+    contentSize.width > layoutViewport.clientWidth,
+    "Width of content is larger than the layout viewport"
+  );
+  ok(
+    contentSize.height > layoutViewport.clientHeight,
+    "Height of content is larger than the layout viewport"
+  );
+});
+
+add_task(async function documentLargerThanViewportScrolledXY({ client }) {
+  const { Page } = client;
+  await loadURL(toDataURL("<div style='margin: 150vh 0 0 150vw'>Hello world"));
+
+  await SpecialPowers.spawn(gBrowser.selectedBrowser, [], () => {
+    content.scrollTo(50, 100);
+  });
+
+  const { contentSize, layoutViewport } = await Page.getLayoutMetrics();
+  await checkContentSize(contentSize);
+  await checkLayoutViewport(layoutViewport, { scrollbars: true });
+
+  is(
+    layoutViewport.pageX,
+    contentSize.x + 50,
+    "X position of content is equal to layout viewport"
+  );
+  is(
+    layoutViewport.pageY,
+    contentSize.y + 100,
+    "Y position of content is equal to layout viewport"
+  );
+  ok(
+    contentSize.width > layoutViewport.clientWidth,
+    "Width of content is larger than the layout viewport"
+  );
+  ok(
+    contentSize.height > layoutViewport.clientHeight,
+    "Height of content is larger than the layout viewport"
+  );
+});
+
+async function checkContentSize(rect) {
+  const expected = await getContentSize();
+
+  is(rect.x, expected.x, "Expected x position returned");
+  is(rect.y, expected.y, "Expected y position returned");
+  is(rect.width, expected.width, "Expected width returned");
+  is(rect.height, expected.height, "Expected height returned");
+}
+
+async function checkLayoutViewport(viewport, options = {}) {
+  const { scrollbars = false } = options;
+
+  const expected = await getViewportSize();
+
+  if (scrollbars) {
+    const { width, height } = await getScrollbarSize();
+    expected.width -= width;
+    expected.height -= height;
+  }
+
+  is(viewport.pageX, expected.x, "Expected x position returned");
+  is(viewport.pageY, expected.y, "Expected y position returned");
+  is(viewport.clientWidth, expected.width, "Expected width returned");
+  is(viewport.clientHeight, expected.height, "Expected height returned");
+}