1 files changed, 44 insertions, 0 deletions
diff --git a/testing/web-platform/tests/html/dom/elements/global-attributes/dataset-set.html b/testing/web-platform/tests/html/dom/elements/global-attributes/dataset-set.html
new file mode 100644
index 0000000000..a5bc177f50
--- /dev/null
+++ b/testing/web-platform/tests/html/dom/elements/global-attributes/dataset-set.html
@@ -0,0 +1,44 @@
+<!DOCTYPE html>
+<html>
+  <head>
+    <title>Dataset - Set</title>
+    <script src="/resources/testharness.js"></script>
+    <script src="/resources/testharnessreport.js"></script>
+  </head>
+  <body>
+    <h1>Dataset - Set</h1>
+    <div id="log"></div>
+    <script>
+      function testSet(prop, expected)
+      {
+        var d = document.createElement("div");
+        d.dataset[prop] = "value";
+        return d.getAttribute(expected) == "value";
+      }
+
+      test(function() { assert_true(testSet('foo', 'data-foo')); },
+        "Setting element.dataset['foo'] should also change the value of element.getAttribute('data-foo')");
+      test(function() { assert_true(testSet('fooBar', 'data-foo-bar')); },
+        "Setting element.dataset['fooBar'] should also change the value of element.getAttribute('data-foo-bar')");
+      test(function() { assert_true(testSet('-', 'data--')); },
+        "Setting element.dataset['-'] should also change the value of element.getAttribute('data--')");
+      test(function() { assert_true(testSet('Foo', 'data--foo')); },
+        "Setting element.dataset['Foo'] should also change the value of element.getAttribute('data--foo')");
+      test(function() { assert_true(testSet('-Foo', 'data---foo')); },
+        "Setting element.dataset['-Foo'] should also change the value of element.getAttribute('data---foo')");
+      test(function() { assert_true(testSet('', 'data-')); },
+        "Setting element.dataset[''] should also change the value of element.getAttribute('data-')");
+      test(function() { assert_true(testSet('\xE0', 'data-\xE0')); },
+        "Setting element.dataset['\xE0'] should also change the value of element.getAttribute('data-\xE0')");
+      test(function() { assert_throws_dom('SYNTAX_ERR', function() { testSet('-foo', 'dummy') }); },
+        "Setting element.dataset['-foo'] should throw a SYNTAX_ERR");
+      test(function() { assert_throws_dom('INVALID_CHARACTER_ERR', function() { testSet('foo\x20', 'dummy') }); },
+        "Setting element.dataset['foo\x20'] should throw an INVALID_CHARACTER_ERR");
+      test(function() { assert_throws_dom('INVALID_CHARACTER_ERR', function() { testSet('\u037Efoo', 'dummy') }); },
+        "Setting element.dataset['\u037Efoo'] should throw an INVALID_CHARACTER_ERR");
+      test(function() { assert_true(testSet('\u0BC6foo', 'data-\u0BC6foo')); },
+        "Setting element.dataset['\u0BC6foo'] should also change the value of element.getAttribute('\u0BC6foo')");
+
+    </script>
+  </body>
+</html>