1 files changed, 36 insertions, 0 deletions
diff --git a/testing/web-platform/tests/preload/dynamic-adding-preload-imagesrcset.html b/testing/web-platform/tests/preload/dynamic-adding-preload-imagesrcset.html
new file mode 100644
index 0000000000..6188355e26
--- /dev/null
+++ b/testing/web-platform/tests/preload/dynamic-adding-preload-imagesrcset.html
@@ -0,0 +1,36 @@
+<!DOCTYPE html>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/preload/resources/preload_helper.js"></script>
+<script>
+    var t = async_test('Makes sure that a dynamically added preload with imagesrcset works');
+</script>
+<body>
+<script>
+    t.step(function() {
+        verifyPreloadAndRTSupport();
+        var expectation = new Array(4).fill(0);
+        if (window.devicePixelRatio < 1.5) {
+          expectation[2] = 1;
+        } else if (window.devicePixelRatio >= 1.5) {
+          expectation[3] = 1;
+        }
+        var link = document.createElement("link");
+        link.as = "image";
+        link.rel = "preload";
+        link.href = "resources/square.png?default";
+        link.imageSrcset = "resources/square.png?200 200w, resources/square.png?400 400w, resources/square.png?800 800w";
+        link.imageSizes = "400px";
+        link.onload = t.step_func(function() {
+            t.step_timeout(function() {
+                verifyNumberOfResourceTimingEntries("resources/square.png?default", expectation[0]);
+                verifyNumberOfResourceTimingEntries("resources/square.png?200", expectation[1]);
+                verifyNumberOfResourceTimingEntries("resources/square.png?400", expectation[2]);
+                verifyNumberOfResourceTimingEntries("resources/square.png?800", expectation[3]);
+                t.done();
+            }, 0);
+        });
+        document.body.appendChild(link);
+    });
+</script>
+</body>