1 files changed, 55 insertions, 0 deletions
diff --git a/comm/mailnews/base/test/unit/test_accountMgrRemoveDefault.js b/comm/mailnews/base/test/unit/test_accountMgrRemoveDefault.js
new file mode 100644
index 0000000000..640c314499
--- /dev/null
+++ b/comm/mailnews/base/test/unit/test_accountMgrRemoveDefault.js
@@ -0,0 +1,55 @@
+/* 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/. */
+
+/**
+ * This tests that if the default account is removed, the default becomes
+ * another account or null. The removed account must not remain the default.
+ */
+var { MailServices } = ChromeUtils.import(
+  "resource:///modules/MailServices.jsm"
+);
+
+function run_test() {
+  // Create account prefs.
+
+  Services.prefs.setCharPref("mail.account.account1.identities", "id1");
+  Services.prefs.setCharPref("mail.account.account1.server", "server1");
+  Services.prefs.setCharPref("mail.account.account2.identities", "id2");
+  Services.prefs.setCharPref("mail.account.account2.server", "server2");
+  Services.prefs.setCharPref("mail.account.account3.identities", "id3");
+  Services.prefs.setCharPref("mail.account.account3.server", "server3");
+
+  Services.prefs.setCharPref("mail.server.server1.hostname", "Local Folders");
+  Services.prefs.setCharPref("mail.server.server1.type", "none");
+  Services.prefs.setCharPref("mail.server.server2.hostname", "host2.invalid");
+  Services.prefs.setCharPref("mail.server.server2.type", "pop3");
+  Services.prefs.setCharPref("mail.server.server3.hostname", "host3.invalid");
+  Services.prefs.setCharPref("mail.server.server3.type", "pop3");
+
+  Services.prefs.setCharPref(
+    "mail.accountmanager.accounts",
+    "account2,account3,account1"
+  );
+  Services.prefs.setCharPref("mail.accountmanager.defaultaccount", "account3");
+
+  // Load of the accounts setup above.
+  Assert.equal(MailServices.accounts.accounts.length, 3);
+  Assert.equal(
+    Services.prefs.getCharPref("mail.accountmanager.accounts"),
+    "account2,account3,account1"
+  );
+  Assert.equal(MailServices.accounts.defaultAccount?.key, "account3");
+
+  // Remove the default account, account3. The default should be set to a
+  // sensible replacement, account2.
+
+  MailServices.accounts.removeAccount(MailServices.accounts.defaultAccount);
+  Assert.equal(MailServices.accounts.defaultAccount?.key, "account2");
+
+  // Remove the default account, account2. No remaining accounts can be the
+  // default, so it should become null.
+
+  MailServices.accounts.removeAccount(MailServices.accounts.defaultAccount);
+  Assert.equal(MailServices.accounts.defaultAccount, null);
+}