1 files changed, 50 insertions, 0 deletions
diff --git a/dom/tests/mochitest/fetch/test_fetch_csp_block.html b/dom/tests/mochitest/fetch/test_fetch_csp_block.html
new file mode 100644
index 0000000000..0347c7319e
--- /dev/null
+++ b/dom/tests/mochitest/fetch/test_fetch_csp_block.html
@@ -0,0 +1,50 @@
+<!DOCTYPE HTML>
+<html>
+<head>
+  <meta charset="utf-8">
+  <title>Test fetch() rejects when CSP blocks</title>
+  <script src="/tests/SimpleTest/SimpleTest.js"></script>
+  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
+</head>
+<body>
+<script type="application/javascript">
+SimpleTest.waitForExplicitFinish();
+
+function withFrame(url) {
+  return new Promise(resolve => {
+    let frame = document.createElement('iframe');
+    frame.addEventListener('load', _ => {
+      resolve(frame);
+    }, { once: true });
+    frame.src = url;
+    document.body.appendChild(frame);
+  });
+}
+
+function asyncTest(frame) {
+  return new Promise((resolve, reject) => {
+    addEventListener('message', evt => {
+      if (evt.data === 'REJECTED') {
+        resolve();
+      } else {
+        reject();
+      }
+    }, { once: true });
+    frame.contentWindow.postMessage('GO', '*');
+  });
+}
+
+withFrame('file_fetch_csp_block_frame.html').then(frame => {
+  asyncTest(frame).then(_ => {
+    ok(true, 'fetch rejected correctly');
+  }).catch(e => {
+    ok(false, 'fetch resolved when it should have been CSP blocked');
+  }).then(_ => {
+    frame.remove();
+    SimpleTest.finish();
+  });
+});
+
+</script>
+</body>
+</html>