1 files changed, 74 insertions, 0 deletions
diff --git a/uriloader/exthandler/tests/mochitest/browser_protocolhandler_loop.js b/uriloader/exthandler/tests/mochitest/browser_protocolhandler_loop.js
new file mode 100644
index 0000000000..149701fb23
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+++ b/uriloader/exthandler/tests/mochitest/browser_protocolhandler_loop.js
@@ -0,0 +1,74 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+"use strict";
+
+add_task(async function test_helperapp() {
+  // Set up the test infrastructure:
+  const kProt = "foopydoopydoo";
+  const extProtocolSvc = Cc[
+    "@mozilla.org/uriloader/external-protocol-service;1"
+  ].getService(Ci.nsIExternalProtocolService);
+  const handlerSvc = Cc["@mozilla.org/uriloader/handler-service;1"].getService(
+    Ci.nsIHandlerService
+  );
+  let handlerInfo = extProtocolSvc.getProtocolHandlerInfo(kProt);
+  if (handlerSvc.exists(handlerInfo)) {
+    handlerSvc.fillHandlerInfo(handlerInfo, "");
+  }
+  // Say we want to use a specific app:
+  handlerInfo.preferredAction = Ci.nsIHandlerInfo.useHelperApp;
+  handlerInfo.alwaysAskBeforeHandling = false;
+
+  // Say it's us:
+  let selfFile = Services.dirsvc.get("XREExeF", Ci.nsIFile);
+  // Make sure it's the .app
+  if (AppConstants.platform == "macosx") {
+    while (
+      !selfFile.leafName.endsWith(".app") &&
+      !selfFile.leafName.endsWith(".app/")
+    ) {
+      selfFile = selfFile.parent;
+    }
+  }
+  let selfHandlerApp = Cc[
+    "@mozilla.org/uriloader/local-handler-app;1"
+  ].createInstance(Ci.nsILocalHandlerApp);
+  selfHandlerApp.executable = selfFile;
+  handlerInfo.possibleApplicationHandlers.appendElement(selfHandlerApp);
+  handlerInfo.preferredApplicationHandler = selfHandlerApp;
+  handlerSvc.store(handlerInfo);
+
+  await BrowserTestUtils.withNewTab("about:blank", async browser => {
+    // Now, do some safety stubbing. If we do end up recursing we spawn
+    // infinite tabs. We definitely don't want that. Avoid it by stubbing
+    // our external URL handling bits:
+    let oldAddTab = gBrowser.addTab;
+    registerCleanupFunction(() => (gBrowser.addTab = oldAddTab));
+    let wrongThingHappenedPromise = new Promise(resolve => {
+      gBrowser.addTab = function (aURI) {
+        ok(false, "Tried to open unexpected URL in a tab: " + aURI);
+        resolve(null);
+        // Pass a dummy object to avoid upsetting BrowserContentHandler -
+        // if it thinks opening the tab failed, it tries to open a window instead,
+        // which we can't prevent as easily, and at which point we still end up
+        // with runaway tabs.
+        return {};
+      };
+    });
+
+    let askedUserPromise = waitForProtocolAppChooserDialog(browser, true);
+
+    BrowserTestUtils.loadURIString(browser, kProt + ":test");
+    let dialog = await Promise.race([
+      wrongThingHappenedPromise,
+      askedUserPromise,
+    ]);
+    ok(dialog, "Should have gotten a dialog");
+
+    let closePromise = waitForProtocolAppChooserDialog(browser, false);
+    dialog.close();
+    await closePromise;
+    askedUserPromise = null;
+  });
+});