1 files changed, 60 insertions, 0 deletions
diff --git a/testing/web-platform/tests/fetch/nosniff/stylesheet.html b/testing/web-platform/tests/fetch/nosniff/stylesheet.html
new file mode 100644
index 0000000000..8f2b5476e9
--- /dev/null
+++ b/testing/web-platform/tests/fetch/nosniff/stylesheet.html
@@ -0,0 +1,60 @@
+<!-- quirks mode is important, text/css is already required otherwise -->
+<script src=/resources/testharness.js></script>
+<script src=/resources/testharnessreport.js></script>
+<div id=log></div>
+<script>
+  var fails = [null, "", "x", "x/x", "text/html", "text/json"],
+      passes = ["text/css", "text/css;charset=utf-8", "text/css;blah"]
+
+  const get_url = (mime) => {
+    let url = "resources/css.py"
+    if (mime != null) {
+        url += "?type=" + encodeURIComponent(mime)
+    }
+    return url
+  }
+
+  fails.forEach(function(mime) {
+    async_test(function(t) {
+      var link = document.createElement("link")
+      link.rel = "stylesheet"
+      link.onerror = t.step_func_done()
+      link.onload = t.unreached_func("Unexpected load event")
+      link.href = get_url(mime)
+      document.body.appendChild(link)
+    }, "URL query: " + mime)
+  })
+
+  fails.forEach(function(mime) {
+    async_test(function(t) {
+      var link = document.createElement("link")
+      link.rel = "stylesheet"
+      link.onerror = t.step_func_done()
+      link.onload = t.unreached_func("Unexpected load event")
+      link.href = get_url(mime)
+      document.body.appendChild(link)
+    }, "Revalidated URL query: " + mime)
+  })
+
+  passes.forEach(function(mime) {
+    async_test(function(t) {
+      var link = document.createElement("link")
+      link.rel = "stylesheet"
+      link.onerror = t.unreached_func("Unexpected error event")
+      link.onload = t.step_func_done()
+      link.href = get_url(mime)
+      document.body.appendChild(link)
+    }, "URL query: " + mime)
+  })
+
+  passes.forEach(function(mime) {
+    async_test(function(t) {
+      var link = document.createElement("link")
+      link.rel = "stylesheet"
+      link.onerror = t.unreached_func("Unexpected error event")
+      link.onload = t.step_func_done()
+      link.href = get_url(mime)
+      document.body.appendChild(link)
+    }, "Revalidated URL query: " + mime)
+  })
+</script>