1 files changed, 34 insertions, 0 deletions
diff --git a/dom/base/test/meta_viewport/test_meta_viewport_remove_node.html b/dom/base/test/meta_viewport/test_meta_viewport_remove_node.html
new file mode 100644
index 0000000000..12104cdf50
--- /dev/null
+++ b/dom/base/test/meta_viewport/test_meta_viewport_remove_node.html
@@ -0,0 +1,34 @@
+<!DOCTYPE HTML>
+<html>
+<head>
+  <meta charset="utf-8">
+  <title>remove meta viewport node</title>
+  <script src="/tests/SimpleTest/SimpleTest.js"></script>
+  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
+  <meta id="viewport" name="viewport" content="width=device-width, initial-scale=1">
+  <script src="viewport_helpers.js"></script>
+</head>
+<body>
+  <script>
+    "use strict";
+
+    add_task(async function remove_viewport_node() {
+      await SpecialPowers.pushPrefEnv(scaleRatio(1.0));
+      let viewport = document.getElementById("viewport");
+
+      let info = getViewportInfo(800, 480);
+      is(info.defaultZoom, 1, "initial zoom is 1");
+      is(info.width, 800, "width should be 800");
+      is(info.height, 480, "height should be 480");
+
+      // Now there is no <meta name="viewport">, but we still retain the info
+      // from the last one.
+      viewport.remove();
+      info = getViewportInfo(800, 480);
+      is(info.defaultZoom, 1, "initial zoom is 1");
+      is(info.width, 800, "width should be 800");
+      is(info.height, 480, "height should be 480");
+    });
+  </script>
+</body>
+</html>