Bug 1598997 - Mock profile fetching function in xpcshell tests. r=eoger

Differential Revision: https://phabricator.services.mozilla.com/D54450

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

services/fxaccounts/tests/xpcshell/test_accounts.js

@@ -200,6 +200,11 @@ function MockFxAccounts(credentials = null) {
     device: {
       _registerOrUpdateDevice() {},
     },
+    profile: {
+      getProfile() {
+        return null;
+      },
+    },
   });
   // and for convenience so we don't have to touch as many lines in this test
   // when we refactored FxAccounts.jsm :)

services/sync/modules-testing/utils.js

@@ -197,6 +197,11 @@ var makeFxAccountsInternalMock = function(config) {
     _getAssertion(audience) {
       return Promise.resolve(config.fxaccount.user.assertion);
     },
+    profile: {
+      getProfile() {
+        return null;
+      },
+    },
   };
 };