1 files changed, 27 insertions, 0 deletions
diff --git a/testing/web-platform/tests/css/css-images/image-set/resources/image-set-rendering-helper.js b/testing/web-platform/tests/css/css-images/image-set/resources/image-set-rendering-helper.js
new file mode 100644
index 0000000000..5045679b4c
--- /dev/null
+++ b/testing/web-platform/tests/css/css-images/image-set/resources/image-set-rendering-helper.js
@@ -0,0 +1,27 @@
+function setupTest() {
+  createPassingNotice();
+  createTestDiv();
+}
+
+function createPassingNotice() {
+  const notice = document.createElement('p');
+
+  notice.textContent =
+      'Test passes if the image below is green when devicePixelRatio is 1, not red.';
+
+  document.body.appendChild(notice);
+}
+
+function createTestDiv() {
+  const testDiv = document.createElement('div');
+
+  testDiv.id = 'test';
+
+  testDiv.style.width = '100px';
+  testDiv.style.height = '100px';
+  testDiv.style.backgroundColor = 'red';
+
+  document.body.appendChild(testDiv);
+}
+
+document.addEventListener("DOMContentLoaded", setupTest);