1 files changed, 49 insertions, 0 deletions
diff --git a/toolkit/components/extensions/test/xpcshell/test_ext_webRequest_style_cache.js b/toolkit/components/extensions/test/xpcshell/test_ext_webRequest_style_cache.js
new file mode 100644
index 0000000000..296bee3685
--- /dev/null
+++ b/toolkit/components/extensions/test/xpcshell/test_ext_webRequest_style_cache.js
@@ -0,0 +1,49 @@
+"use strict";
+
+const BASE = "http://example.com/data/";
+
+const server = createHttpServer({ hosts: ["example.com"] });
+
+server.registerDirectory("/data/", do_get_file("data"));
+
+add_task(async function test_stylesheet_cache() {
+  let extension = ExtensionTestUtils.loadExtension({
+    manifest: {
+      permissions: ["webRequest", "webRequestBlocking", "<all_urls>"],
+    },
+    background() {
+      const SHEET_URI = "http://example.com/data/file_stylesheet_cache.css";
+      let firstFound = false;
+      browser.webRequest.onBeforeRequest.addListener(
+        details => {
+          browser.test.assertEq(
+            details.url,
+            firstFound ? SHEET_URI + "?2" : SHEET_URI
+          );
+          firstFound = true;
+          browser.test.sendMessage("stylesheet found");
+        },
+        { urls: ["<all_urls>"], types: ["stylesheet"] },
+        ["blocking"]
+      );
+    },
+  });
+
+  await extension.startup();
+
+  let cp = await ExtensionTestUtils.loadContentPage(
+    BASE + "file_stylesheet_cache.html"
+  );
+
+  await extension.awaitMessage("stylesheet found");
+
+  // Need to use the same ContentPage so that the remote process the page ends
+  // up in is the same.
+  await cp.loadURL(BASE + "file_stylesheet_cache_2.html");
+
+  await extension.awaitMessage("stylesheet found");
+
+  await cp.close();
+
+  await extension.unload();
+});