1 files changed, 48 insertions, 0 deletions
diff --git a/testing/web-platform/tests/html/semantics/forms/the-select-element/select-multiple.html b/testing/web-platform/tests/html/semantics/forms/the-select-element/select-multiple.html
new file mode 100644
index 0000000000..e348064151
--- /dev/null
+++ b/testing/web-platform/tests/html/semantics/forms/the-select-element/select-multiple.html
@@ -0,0 +1,48 @@
+<!doctype html>
+<meta charset=utf-8>
+<title>HTMLSelectElement ask for reset</title>
+<link rel="author" title="Sebastian Mayr" href="wpt@smayr.name">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<select multiple id="initial-selected">
+  <option selected>Test 1</option>
+  <option selected>Test 2</option>
+</select>
+<select multiple id="scripted-select">
+  <option selected>Test 1</option>
+  <option>Test 2</option>
+</select>
+<div id=log></div>
+<script>
+"use strict";
+
+test(() => {
+
+  const select = document.getElementById("initial-selected");
+  assert_true(select.options[0].selected, "first option should be selected.");
+  assert_true(select.options[1].selected, "second option should be selected.");
+
+}, "multiple selected options exist, both set from markup");
+
+test(() => {
+
+  const select = document.getElementById("initial-selected");
+  select.options[1].selected = true;
+
+  assert_true(select.options[0].selected, "first option should be selected.");
+  assert_true(select.options[1].selected, "second option should be selected.");
+
+}, "multiple selected options exist, one set from script");
+
+// crbug.com/1245443
+test(() => {
+  let select = document.createElement("select");
+  select.length = 4;
+  let o1 = select.options.item(1);
+  select.multiple = true;
+  select.selectedIndex = 2;
+  o1.selected = true;
+  select.multiple = false;
+  assert_equals(select.selectedOptions.length, 1);
+}, "Removing multiple attribute reduces the number of selected OPTIONs to 1");
+</script>