1 files changed, 41 insertions, 0 deletions
diff --git a/devtools/client/inspector/markup/test/browser_markup_screenshot_node_shadowdom.js b/devtools/client/inspector/markup/test/browser_markup_screenshot_node_shadowdom.js
new file mode 100644
index 0000000000..2f1382a6a3
--- /dev/null
+++ b/devtools/client/inspector/markup/test/browser_markup_screenshot_node_shadowdom.js
@@ -0,0 +1,41 @@
+/* Any copyright is dedicated to the Public Domain.
+ http://creativecommons.org/publicdomain/zero/1.0/ */
+
+"use strict";
+
+const TEST_URL = `data:text/html;charset=utf8,
+  <test-component></test-component>
+  <script>
+    'use strict';
+    customElements.define('test-component', class extends HTMLElement {
+      constructor() {
+        super();
+        let shadowRoot = this.attachShadow({mode: 'open'});
+        shadowRoot.innerHTML =
+          '<div style="width:30px;height:30px;background:rgb(0, 128, 0)"></div>';
+      }
+    });
+  </script>`;
+
+// Test that the "Screenshot Node" feature works with a node inside a shadow root.
+add_task(async function () {
+  const { inspector, toolbox } = await openInspectorForURL(encodeURI(TEST_URL));
+
+  info("Select the green node");
+  const greenNode = await getNodeFrontInShadowDom(
+    "div",
+    "test-component",
+    inspector
+  );
+  await selectNode(greenNode, inspector);
+
+  info("Take a screenshot of the green node and verify it looks as expected");
+  const greenScreenshot = await takeNodeScreenshot(inspector);
+  await assertSingleColorScreenshotImage(greenScreenshot, 30, 30, {
+    r: 0,
+    g: 128,
+    b: 0,
+  });
+
+  await toolbox.destroy();
+});