1 files changed, 54 insertions, 0 deletions
diff --git a/devtools/client/debugger/test/mochitest/browser_dbg-sourcemaps-redirect.js b/devtools/client/debugger/test/mochitest/browser_dbg-sourcemaps-redirect.js
new file mode 100644
index 0000000000..afde670811
--- /dev/null
+++ b/devtools/client/debugger/test/mochitest/browser_dbg-sourcemaps-redirect.js
@@ -0,0 +1,54 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at <http://mozilla.org/MPL/2.0/>. */
+
+// Test the redirects on the sourceMappingURL are blocked and not followed.
+
+"use strict";
+
+const httpServer = createTestHTTPServer();
+const BASE_URL = `http://localhost:${httpServer.identity.primaryPort}`;
+
+httpServer.registerContentType("html", "text/html");
+httpServer.registerContentType("js", "application/javascript");
+
+httpServer.registerPathHandler("/index.html", (request, response) => {
+  response.setStatusLine(request.httpVersion, 200, "OK");
+  response.write(`<!doctype html>
+    <html>
+      <head>
+        <script>
+          const foo = 2;
+          console.log(foo);
+          //# sourceMappingURL=${BASE_URL}/redirect
+        </script>
+      </head>
+    </html>
+  `);
+});
+
+httpServer.registerPathHandler("/redirect", (request, response) => {
+  response.setStatusLine(request.httpVersion, 301, "Moved Permanently");
+  response.setHeader("Location", `${BASE_URL}/evil`);
+});
+
+httpServer.registerPathHandler("/evil", (request, response) => {
+  response.setStatusLine(request.httpVersion, 200, "OK");
+  response.write(
+    `{"version":3,"sources":["evil.original.js"],"names":[], "mappings": ""}`
+  );
+});
+
+add_task(async function () {
+  const dbg = await initDebuggerWithAbsoluteURL(`${BASE_URL}/index.html`);
+
+  await getDebuggerSplitConsole(dbg);
+  await hasConsoleMessage(dbg, "Source map error");
+  const { value } = await findConsoleMessage(dbg, "Source map error");
+
+  is(
+    value,
+    `Source map error: NetworkError when attempting to fetch resource.\nResource URL: ${BASE_URL}/index.html\nSource Map URL: ${BASE_URL}/redirect[Learn More]`,
+    "A source map error message is logged indicating the redirect failed"
+  );
+});