Bug 1607894 - Add debugging assert to Normandy test for intermittent r=leplatrem

Differential Revision: https://phabricator.services.mozilla.com/D63936

--HG--
extra : moz-landing-system : lando

toolkit/components/normandy/test/browser/browser_RecipeRunner.js

@@ -244,6 +244,7 @@ decorate_task(
     // Will timeout if notifications were not received.
     await startPromise;
     await endPromise;
+    ok(true, "The test should pass without timing out");
   }
 );
 
@@ -303,6 +304,15 @@ decorate_task(
     await rsCollection.db.saveLastModified(42);
     rsCollection.db.close();
 
+    let recipesFromRS = (await RecipeRunner._remoteSettingsClientForTesting.get()).map(
+      ({ recipe, signature }) => recipe
+    );
+    Assert.deepEqual(
+      recipesFromRS,
+      [matchRecipe, noMatchRecipe, missingRecipe],
+      "The recipes should be accesible from Remote Settings"
+    );
+
     await RecipeRunner.run();
 
     Assert.deepEqual(