1 files changed, 20 insertions, 0 deletions
diff --git a/gfx/layers/apz/test/mochitest/helper_scroll_thumb_dragging.html b/gfx/layers/apz/test/mochitest/helper_scroll_thumb_dragging.html
new file mode 100644
index 0000000000..821cf00be7
--- /dev/null
+++ b/gfx/layers/apz/test/mochitest/helper_scroll_thumb_dragging.html
@@ -0,0 +1,20 @@
+<!DOCTYPE html>
+<script src="/tests/SimpleTest/SimpleTest.js"></script>
+<script src="/tests/SimpleTest/paint_listener.js"></script>
+<script src="apz_test_utils.js"></script>
+<script src="apz_test_native_event_utils.js"></script>
+<style>
+iframe {
+  width: 500px;
+  height: 50px; /* lower height relative to the root scrollable height */
+}
+</style>
+<div style="height: 200vh;"></div>
+<iframe src="http://example.org/"></iframe>
+<div style="height: 200vh;"></div>
+<script>
+  // Silence SimpleTest warning about missing assertions by having it wait
+  // indefinitely. We don't need to give it an explicit finish because the
+  // entire window this test runs in will be closed after subtestDone is called.
+  SimpleTest.waitForExplicitFinish();
+</script>