1 files changed, 45 insertions, 0 deletions
diff --git a/dom/url/tests/test_url_data.html b/dom/url/tests/test_url_data.html
new file mode 100644
index 0000000000..a4d017936a
--- /dev/null
+++ b/dom/url/tests/test_url_data.html
@@ -0,0 +1,45 @@
+<!DOCTYPE HTML>
+<html>
+<head>
+  <meta charset="utf-8">
+  <title>Test URL API - data:plain</title>
+  <script src="/tests/SimpleTest/SimpleTest.js"></script>
+  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
+</head>
+<body>
+<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=1018682">Mozilla Bug 1018682</a>
+
+<script type="application/javascript">
+
+var base = new URL("data:text/plain,");
+
+let relative;
+try {
+  relative = new URL("a", base);
+  ok(false, "Relative URL from a data:text/plain should not work.");
+} catch (e) {
+  ok(true, "Relative URL from a data:text/plain should not work.");
+}
+
+base.protocol = "chrome:";
+is(base.protocol, "chrome:", "The protocol should be changed from data to chrome.");
+
+try {
+  relative = new URL("a", base);
+  ok(true, "Relative URL from a chrome: should work.");
+} catch (e) {
+  ok(false, "Relative URL from a chrome: should work.");
+}
+
+base.protocol = "http:";
+ok(true, "Protocol: http changed");
+is(base.href, "http://text/plain,", "Base URL is correct");
+
+relative = new URL("a", base);
+ok(relative, "This works.");
+is(relative.href, "http://text/a", "Relative URL is correct");
+
+</script>
+
+</body>
+</html>